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Hire Dr. Hamid R.

United Kingdom

USD 90 /hr

Environmental Engineering Specialist | Research-to-Impact Strategist | Grant & Publication Consultant

Profile Summary

Dual PhD-qualified academic specialist in Environmental and Civil Engineering with 16+ years’ experience in advanced water and wastewater treatment, environmental nanotechnology, persistent pollution remediation, nanomaterials synthesis, separation processes, and AMR mitigation. Proven track record in UKRI/EPSRC grant writing and high-impact scientific publishing. I offer expert support in research design, proposal development, scientific editing, and technical consultancy for clients seeking precision, innovation, and translational impact.

Subject Matter Expertise

• ☆ Catalysis
• ☆ Surface Science
• ☆ Materials Science & Engineering
• ☆ Nanotechnology & Nanomaterials
• ☆ Polymer Chemistry
• ☆ Analytical Chemistry
• ☆ Separation & Purification
• ☆ Environmental Engineering and Technology
• ☆ Environmental Science
• ☆ Environmental Remediation
• ☆ Environmental Chemistry

Services

• Writing
• Research
• Consulting
• Product Development

Writing Technical Writing, General Proofreading & Editing

Research Feasibility Study, Scientific and Technical Research, Systematic Literature Review

Consulting Scientific and Technical Consulting

Product Development Concept Development

Work Experience

Lecturer

University of Liverpool

November 2021 - Present

Education

PhD in Civil Engineering (Mechanical, Aerospace and Civil Engineering (MACE))

University of Manchester

September 2018 - September 2021

Certifications

• Certification details not provided.

Publications

JOURNAL ARTICLE

Hamid Rajabi, Samaneh Ghaedi, Mojgan Hadi Mosleh, Ben F Spencer, Majid Sedighi(2025). Assessing the efficiency and reusability of zirconium-based MOF-biochar composite for the removal of Pb (II) and Cd (II) in single and multi-ionic systems . Journal of Environmental Management. 380. p. 125122.

Hamid Rajabi, Haijian Xie, Xiaobin Chen, Yanghui Shi, Huaxiang Yan(2025). Methane Dynamics in Landfill Vegetated Covers: Steady-State Model for Oxidation and Diffusion . Journal of Environmental Engineering (United States). 151. (1). American Society of Civil Engineers (ASCE)

Hamid Rajabi, Samaneh Ghaedi, Mojgan Hadi Mosleh, Majid Sedighi(2024). MOF biochar composites for environmental protection and pollution control . Bioresource Technology. (131982). p. 131982--131982. Elsevier BV

UiO-67 metal-organic framework loaded on hardwood biochar for sustainable management of environmental boron contaminations @article{663fa113f2d248ebac29fce009d1612d, title = "UiO-67 metal-organic framework loaded on hardwood biochar for sustainable management of environmental boron contaminations", abstract = "Boron contamination in water poses significant potential risks to human health and the environment, necessitating the development of efficient, cost-effective, and sustainable remediation technologies. This study introduces a novel composite material combining a zirconium-based metal-organic framework (UiO-67) and a low-cost carbonaceous material (hardwood biochar, BC) with synergetic efficiency to address boron-polluted waters. The UiO-67-biochar (UBC) composite exhibits effective surface chemistry and a remarkably high specific surface area of approximately 881.9 m²/g, substantially increasing from the 19.7 m²/g of biochar. Our experimental results demonstrate that UBC removed up to 88.5 % of boron from 20 ppm polluted water, achieving levels compliant with the WHO standards. The composite also showed excellent reusability, maintaining 95 % efficiency over multiple cycles without loss of crystallinity. Life cycle assessment and cost analysis indicate that an optimal MOF to biochar ratio of approximately 60 wt% minimises CO2 emissions and costs while maximising the boron removal efficiency. The UiO-67-biochar composites proposed here offers a promising scalable solution for boron contamination and potentially other environmental pollutants, combining the high functionality of UiO-67 with the practical and economic advantages of biochar.", keywords = "Adsorption, Biochar, Boron contamination, Composites, Metal-organic frameworks", author = "Samaneh Ghaedi and Hamid Rajabi and Mosleh, {Mojgan Hadi} and Peyman Babakhani and Majid Sedighi", year = "2024", month = dec, day = "1", doi = "10.1016/j.jece.2024.114511", language = "English", volume = "12", journal = "Journal of Environmental Chemical Engineering", issn = "2213-3437", publisher = "Elsevier BV", number = "6", } . Journal of Environmental Chemical Engineering.

Hamid Rajabi, Qiao Wang, Fusheng Zha, Long Xu, Huaxiang Yan(2024). Decoding Methane Flow in Fractured Clay: A Semi‐Analytical Model With Matrix Diffusion and Advection . International Journal for Numerical and Analytical Methods in Geomechanics. 48. (18). p. 4443--4456. Wiley

Hamid Rajabi, Masoud Akbari, Jamal Rasouli, Kamal Rasouli, Samaneh Ghaedi, Milad Mohammadi, Samad Sabbaghi(2024). MXene-based composite photocatalysts for efficient degradation of antibiotics in wastewater . Scientific Reports. 14. (1). p. 31498.

Hamid Rajabi, Seyedeh Mahdieh Mousavi, Mohammad Sina Mohtaram, Kamal Rasouli, Soheil Mohtaram, Samad Sabbaghi(2024). Efficient Visible-Light-Driven Photocatalytic Degradation of Antibiotics in Water by MXene-Derived TiO2-Supported SiO2/Ti3C2 Composites: Optimisation, Mechanism and Toxicity Evaluation . Environmental Pollution. p. 125624--125624.

Hamid Rajabi, Samaneh Ghaedi, Mojgan Hadi Mosleh, Peyman Babakhani, Majid Sedighi(2024). UiO-67 metal-organic framework loaded on hardwood biochar for sustainable management of environmental boron contaminations . Journal of Environmental Chemical Engineering. (114511). p. 114511--114511. Elsevier BV

Hamid Rajabi, Petr Nikolaev, Andrey Jivkov, Huaxiang Yan, Xiaoming Zhu, Majid Sedighi(2024). Semi-analytical predictive model for natural and artificial thawing of circular ground-ice walls . Computers and Geotechnics. 171. (106394). p. 106394--106394. Elsevier BV

Hamid Rajabi, Roya Moosaei, Samad Sabbaghi, Mohammad Sadegh Jafari Zadegan, Kamal Rasouli, Samaneh Ghaedi(2024). Silver nanoparticles modified titanium carbide MXene composite for RSM-CCD optimised chloride removal from water . Journal of Molecular Liquids. 399. (124480). p. 124480--124480. Elsevier BV

Hamid Rajabi, Mojgan Hadi Mosleh(2024). NaOH-benzoic acid modified biochar for enhanced removal of aromatic VOCs . Separation and Purification Technology. 330. (125453). p. 125453--125453. Elsevier BV

Hamid Rajabi, Milad Esfandiaribayat, Mojtaba Binazadeh, Samad Sabbaghi, Milad Mohammadi, Samaneh Ghaedi(2024). Tetracycline removal from wastewater via g-C₃N₄ loaded RSM-CCD-optimised hybrid photocatalytic membrane reactor . Scientific Reports. 14. (1). p. 1163--1163.

Type-1 α-Fe2O3/TiO2 photocatalytic degradation of tetracycline from wastewater using CCD-based RSM optimization @article{b1a15a0d55b2463caf2a5e5d86d53165, title = "Type-1 α-Fe2O3/TiO2 photocatalytic degradation of tetracycline from wastewater using CCD-based RSM optimization", abstract = "Antibiotic pollution in water is a growing threat to public health and the environment, leading to the spread of antimicrobial-resistant bacteria. While photocatalysis has emerged as a promising technology for removing antibiotics from water, its limited efficiency in the visible light range remains a challenge. In this study, we present a novel method for the photocatalytic degradation of tetracycline, the second most commonly used antibiotic worldwide, using α-Fe2O3/TiO2 nanocomposites synthesized via rapid sonochemical and wet impregnation methods. The nanocomposites were characterised and tested using a range of techniques, including BET, TEM, FTIR, XRD, FESEM, EDS, and UV–Vis. The RSM-CCD method was also used to optimize the degradation process by varying four key variables (initial concentration, photocatalyst quantity, irradiation time, and pH). The resulting optimized conditions achieved a remarkable degradation rate of 97.5%. We also investigated the mechanism of photodegradation and the reusability of the photocatalysts, as well as the effect of light source operating conditions. Overall, the results demonstrate the effectiveness of the proposed approach in degrading tetracycline in water and suggest that it may be a promising, eco-friendly technology for the treatment of water contaminated with antibiotics.", keywords = "Photocatalytic degradation, RSM-CCD optimization, Tetracycline, Water treatment, α-Fe O /TiO", author = "Milad Mohammadi and Samad Sabbaghi and Mojtaba Binazadeh and Samaneh Ghaedi and Hamid Rajabi", year = "2023", month = sep, day = "1", doi = "10.1016/j.chemosphere.2023.139311", language = "English", volume = "336", journal = "Chemosphere", issn = "0045-6535", publisher = "Elsevier BV", } . Chemosphere.

Hamid Rajabi, Milad Mohammadi, Samad Sabbaghi, Mojtaba Binazadeh, Samaneh Ghaedi(2023). Type-1 α-Fe2O3/TiO2 photocatalytic degradation of tetracycline from wastewater using CCD-based RSM optimization . Chemosphere. 336. (139311). p. 139311--139311. Elsevier BV

Hamid Rajabi, Huaxiang Yan, Haijian Xie, Xiting Gu, Yun Chen(2023). Analytical solution for one-dimensional steady-state VOCs diffusion in simplified capillary cover systems . International Journal for Numerical and Analytical Methods in Geomechanics. 47. (12). p. 2304--2321.

Artificial Ground Freezing by Solid Carbon Dioxide – Analysis of Thermal Performance @article{1090ae5e2b58455fab073af8e79f2689, title = "Artificial Ground Freezing by Solid Carbon Dioxide – Analysis of Thermal Performance", abstract = "Artificial ground freezing (AGF) is a ground improvement technique that is commonly used to create temporary earth support and groundwater control system during underground constructions (tunnels, shafts and mines). In the past two decades, solid carbon dioxide (SCD) has received increasing interest as a source of cold to freeze the soils. SCD provides a faster and safer solution to lower the ground temperature below the freezing point compared with alternative and conventional AGF techniques using refrigerants such as liquid nitrogen (LN). The existing analytical models for the design of AGF cannot provide accurate prediction of the SCD-based artificial ground freezing as they do not consider the specificity of heat transfer to the sublimated SCD. In addition, they neglect the thermal resistance due to the effects of the layers of freeze pipe, drilling mud and casting materials in the overall heat transfer. We present a new semi-analytical model for the formation of a frozen body during SCD-based ground freezing that takes into account the presence of additional sources of thermal resistance at the freeze pipe. The proposed model describes the formation dynamics of single-ice cylinders and plane ice-wall along with temperature distributions within the freezing mass and SCD consumption. The proposed model is tested against the known laboratory test results and alternative numerical models to demonstrate the accuracy of the solution for predicting all characteristics of ice-wall dynamics.", keywords = "Artificial ground freezing, Ground improvement technique, Solid carbon dioxide, Tunnelling, Two-phase Stephan problem", author = "Petr Nikolaev and Majid Sedighi and Hamid Rajabi and Alexander Pankratenko", note = "Funding Information: Petr Nikolaev would like to thank Prof. Mikhail Shuplik who is one of the founders of this ground freezing method and who devoted more than 30 years to its development and introduction to many geotechnical projects; Prof. Shuplik was his supervisor for many years and introduced to him this unique ground freezing method and inspired him to develop this research. Publisher Copyright: {\textcopyright} 2022 The Author(s)", year = "2022", month = dec, day = "1", doi = "10.1016/j.tust.2022.104741", language = "English", volume = "130", journal = "Tunnelling and Underground Space Technology ", issn = "0886-7798", publisher = "Elsevier BV", } . Tunnelling and Underground Space Technology.

Hamid Rajabi, Petr Nikolaev, Majid Sedighi, Alexander Pankratenko(2022). Artificial ground freezing by solid carbon dioxide - Analysis of thermal performance . Tunnelling and Underground Space Technology. 130. (ARTN 104741).

Competitive adsorption of multicomponent volatile organic compounds on biochar @article{e05b60f01d4347c5aff458f079be9d13, title = "Competitive adsorption of multicomponent volatile organic compounds on biochar", abstract = "Crude oil contaminated lands are recognised to have significant contributions to airborne volatile organic compounds (VOCs) with adverse effects on human health and tropospheric ozone. Soil capping systems for controlling harmful emissions are critical engineering solutions where advanced soil remediation techniques are neither available nor feasible. Studies on the adsorption of single VOC species in biochar have shown promising results as a potential capping material; however, current understanding of mixed gas system and multi-component adsorption of VOCs on biochar which would represent more realistic in situ conditions is very limited. We present, for the first time, the results of a study on competitive adsorption of mixed VOCs, including aromatic and non-aromatic VOCs commonly emitted from crude oil contaminated sites on two types of biochar pyrolysed at 500°C from wheat straw and bagasse as feedstock. The kinetics of sorption of multicomponent VOCs including acetone, hexane, toluene and p-xylene in biochar are studied based on the results of an extensive experimental investigation using a bespoke laboratory setup. Both biochar types used in this study presented a high sorption capacity for VOC compounds when tested individually (51–110 mg/g). For the multicomponent mixture, the competition for occupying sorption sites on biochar surface resulted in a lower absolute sorption capacity for each species, however, the overall sorption capacity of biochar remained more or less similar to that observed in the single gas experiments (50–109 mg/g). The chemical interactions via hydrogen bonds, electrostatic attraction, and pore-filling were found to be the main mechanisms of adsorption of VOC in the biochar studied. The efficiency of biochar regeneration was assessed through five cycles of adsorption-desorption tests and was found to be between 88% and 96%. The incomplete desorption observed confirm the formation of likely permanent bonds and heel build-ups during the sorption process.", keywords = "Biochar, Crude oil-contaminated soil, Desorption, Multi-component sorption, VOCs", author = "Hamid Rajabi and {Hadi Mosleh}, Mojgan and Tirto Prakoso and Negin Ghaemi and Parthasarathi Mandal and Amanda Lea-Langton and Majid Sedighi", note = "Funding Information: H Rajabi acknowledges the financial support through Dean's Awards of the Faculty of Science and Engineering at the University of Manchester. M Hadi Mosleh and M Sedighi gratefully acknowledge the financial support provided for the project VOCaL by the University of Manchester Research England GCRF QR Allocation and the Department for Business, Energy and Industrial Strategy via British Council by grant 527663638 (GeoGrab). The authors would like to thank Prof. Yazid Bindar and Mr Pandit Hernowo from Bandung Institute of Technology (ITB) for their support in this project and the production of biochar. Funding Information: H Rajabi acknowledges the financial support through Dean's Awards of the Faculty of Science and Engineering at the University of Manchester . M Hadi Mosleh and M Sedighi gratefully acknowledge the financial support provided for the project VOCaL by the University of Manchester Research England GCRF QR Allocation and the Department for Business, Energy and Industrial Strategy via British Council by grant 527663638 (GeoGrab). The authors would like to thank Prof. Yazid Bindar and Mr Pandit Hernowo from Bandung Institute of Technology (ITB) for their support in this project and the production of biochar. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd", year = "2021", month = nov, day = "1", doi = "10.1016/j.chemosphere.2021.131288", language = "English", volume = "283", journal = "Chemosphere", issn = "0045-6535", publisher = "Elsevier BV", } . Chemosphere.

Hamid Rajabi and Mojgan Hadi Mosleh and Tirto Prakoso and Negin Ghaemi and Parthasarathi Mandal and Amanda Lea-Langton and Majid Sedighi(2021). Competitive adsorption of multicomponent volatile organic compounds on biochar . Chemosphere. 283. p. 131288. Elsevier {BV}

Hamid Rajabi, Mojgan Hadi Mosleh, Tirto Prakoso, Negin Ghaemi, Parthasarathi Mandal, Amanda Lea-Langton, Majid Sedighi(2021). Competitive adsorption of multicomponent volatile organic compounds on biochar . Chemosphere. 283. (131288). p. 131288--131288. Elsevier BV

Hamid Rajabi and Mojgan Hadi Mosleh and Parthasarathi Mandal and Amanda Lea-Langton and Majid Sedighi(2021). Sorption behaviour of xylene isomers on biochar from a range of feedstock . Chemosphere. 268. p. 129310. Elsevier {BV}

Sorption behaviour of xylene isomers on biochar from a range of feedstock @article{3d9bad7b70bd46e4ad1394287c7d54cb, title = "Sorption behaviour of xylene isomers on biochar from a range of feedstock", abstract = "Inland oil spillage is one of the widespread sources of crude oil volatile organic compound emissions (CVEs) for which the long-term remedial solutions are often complex and expensive. This paper investigates the potential of a low-cost containment solution for contaminated solids by volatile organic compounds (VOCs) using biochar. The results of an extensive experimental investigation are presented on the sorption kinetics of xylene isomers (one type of the most frequently detected CVEs) on commercial biochar produced by prevalent feedstocks (wheat, corn, rice and rape straw as well as hardwood) at affordable temperatures (300–500°C). Chemical and physical properties of biochar were analysed in terms of elemental composition, scanning electron microscopy, specific surface area, ATR-FTIR spectra and Raman spectrometry. We show that for high-temperature biochar with similar surface chemistry, the sorption efficiency is mainly controlled by porous structure and pore size distribution. Biochar samples with higher specific surface area and higher volume of mesopores showed the highest sorption capacity (45.37–50.88 mg/g) since the sorbate molecules have more access to active sites under a greater intra-particle diffusion and elevated pore-filling. P-xylene showed a slightly higher sorption affinity to biochar compared to other isomers, especially in mesoporous biochar, which can be related to its lower kinetic diameter and simpler molecular shape. The sorption capacity of biochar produced at higher pyrolysis temperatures was found to be more sensitive to changes in ambient temperature due to dominant physical adsorption. Elovich kinetic model was found to be the best model to describe xylenes{\textquoteright} sorption on biochar which indirectly indicates π–π stacking and hydrogen bonding as the main mechanism of xylene sorption on these types of biochar.", keywords = "Adsorption, Biochar, Crude oil contaminated soil, Partitioning, VOCs, Xylene isomers", author = "Hamid Rajabi and {Hadi Mosleh}, Mojgan and Parthasarathi Mandal and Amanda Lea-Langton and Majid Sedighi", note = "Funding Information: H Rajabi acknowledges the financial support through the PhD Scholarship under the Dean{\textquoteright}s Awards of the Faculty of Science and Engineering at the University of Manchester . M Hadi Mosleh and M Sedighi gratefully acknowledge the financial support provided for the project VOCaL by the University of Manchester Research England GCRF QR Allocation . Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd", year = "2021", month = apr, doi = "doi.org/10.1016/j.chemosphere.2020.129310", language = "English", volume = "268", journal = "Chemosphere", issn = "0045-6535", publisher = "Elsevier BV", } . Chemosphere.

Hamid Rajabi, Mojgan Hadi Mosleh, Parthasarathi Mandal, Amanda Lea-Langton, Majid Sedighi(2021). Sorption behaviour of xylene isomers on biochar from a range of feedstock . Chemosphere. 268. (ARTN 129310).

Hamid Rajabi, Mojgan Hadi Mosleh, Parthasarathi Mandal, A.R.Lea-Langton, Majid Sedighi(2020). Emissions of volatile organic compounds from crude oil processing - global emission inventory and environmental release . Science of the Total Environment. Elsevier BV

Hamid Rajabi, Mojgan Hadi Mosleh, Parthasarathi Mandal, Amanda Lea-Langton, Majid Sedighi(2020). Emissions of volatile organic compounds from crude oil processing - Global emission inventory and environmental release . Science of the Total Environment. 727. (ARTN 138654).

Rajabi, H., Sharifipour, M.(2019). Geotechnical properties of hydrocarbon-contaminated soils: a comprehensive review . Bulletin of Engineering Geology and the Environment. 78. (5). p. 3685-3717.

Hamid Rajabi, Mohammad Sharifipour(2019). Geotechnical properties of hydrocarbon-contaminated soils: a comprehensive review . Bulletin of Engineering Geology and the Environment. 78. (5). p. 3685--3717.

Hamid Rajabi, Mohammad Sharifipour(2019). Effects of light crude oil contamination on small-strain shear modulus of Firoozkooh sand . European Journal of Environmental and Civil Engineering. 23. (11). p. 1351--1367. Taylor & Francis

Hamid Rajabi, Mohammad Sharifipour(2019). Effects of light crude oil contamination on small-strain shear modulus of Firoozkooh sand . European Journal of Environmental and Civil Engineering. 23. (11). p. 1351--1367.

Hamid Rajabi, Mohammad Sharifipour(2018). Geotechnical properties of hydrocarbon-contaminated soils: a comprehensive review . Bulletin of Engineering Geology and the Environment. Springer Nature

Influence of weathering process on small-strain shear modulus (Gmax) of hydrocarbon-contaminated sand @article{facf1f2eb20f4274aaf5e6df3f775331, title = "Influence of weathering process on small-strain shear modulus (Gmax) of hydrocarbon-contaminated sand", abstract = "The engineering characteristics of hydrocarbon-contaminated soils have been concentrated so far. However, besides influential effects of weathering on hydrocarbon-contaminated soils, a substantial majority of these studies have been devoted to short-term analyses. By the same token, the present paper aims at comparing short- and long-term effects of light crude oil contamination on maximum shear modulus () of two sand (Ottawa and Firoozkooh sand). To this aim, a series of bender element tests was conducted on both newly and aged contaminated sand samples under similar circumstances so as to characterize short- and long-term influences of the hydrocarbon contamination on . In the short term, of Firoozkooh sand was more sensitive to the contamination compared to Ottawa sand; however, the tendency of their responses was almost similar so that presence of 4 wt% of crude oil into both sand types could greatly increase the value of , and adding further contamination made markedly negative changes in to some extent that of both 8 wt% contaminated sand types was lower than that of clean ones. Furthermore, of both sand types were not sensitive to adding more crude oil (≥ 8 wt%). Generally, in the long term, weathering process could obviously increase the value of of both sand types such that the changes were more detectable during the first 6 months, and more importantly, the majority of these alterations took place in the first 2 months. Additionally, in contrast to short-term findings, contaminated Ottawa sand samples were more sensitive to weathering process, and the degree of weathering effects on was more observable in 4 wt% contaminated samples of both sand types in comparison with specimens containing 8 and 12 wt% of crude oil.", author = "Hamid Rajabi and Mohammad Sharifipour", year = "2018", month = apr, doi = "10.1016/j.soildyn.2018.01.006", language = "English", pages = "129--140", journal = "Soil Dynamics and Earthquake Engineering", issn = "0267-7261", publisher = "Elsevier BV", } . Soil Dynamics and Earthquake Engineering.

Rajabi, H., Sharifipour, M.(2018). Influence of weathering process on small-strain shear modulus (G<inf>max</inf>) of hydrocarbon-contaminated sand . Soil Dynamics and Earthquake Engineering. 107. p. 129-140.

Hamid Rajabi, Mohammad Sharifipour(2018). Influence of weathering process on small-strain shear modulus (G_max) of hydrocarbon-contaminated sand . Soil Dynamics and Earthquake Engineering. 107. p. 129--140.

An Experimental Characterization of Shear Wave Velocity (V-s) in Clean and Hydrocarbon-Contaminated Sand @article{85ca95bddce846e0a75f8c1be663353f, title = "An Experimental Characterization of Shear Wave Velocity (V-s) in Clean and Hydrocarbon-Contaminated Sand", abstract = "The characteristics of hydrocarbon-contaminated soils have been among major concerns of geotechnical engineers due to its significant frequency of event and also its influential consequences on our surroundings from various environmental and engineering viewpoints. Heretofore, the effects of diverse kinds of hydrocarbon contaminants on majority of geotechnical properties of fine- and coarse-grained soils such as grain size, hydraulic conductivity, plasticity, compressibility, internal friction, cohesion, and shear strength have been investigated. However, there has not been a concentrated research study examining shear wave velocity ( Vs ) of hydrocarbon-contaminated soils as an important geotechnical property of soil due to this fact that, in small/very small strain levels, the maximum shear modulus of soils ( Gmax ) can be determined using shear wave velocity ( Gmax=ρV2s ). This paper aims to investigate effects of hydrocarbon contamination on shear wave velocity of sandy soils by comparing shear wave velocities in identically prepared clean and contaminated samples. To this aim, an Iranian light crude oil, a standard type of silica sand (Ottawa sand), and a bender element apparatus were used to minutely measure shear wave velocity of clean and crude oil contaminated sand samples. Moreover, dry and quasi-moist tamping methods were employed in order to provide comparable clean and contaminated specimens (containing 4, 6, 8, 10, and 12 wt% of crude oil), respectively. Firstly, a comprehensive bender element (BE) and resonant column tests were conducted on the identically prepared clean sand samples at various amounts of frequency (2–20 kHz) and under various confining pressure (50–500 kPa) to find the best methods of accurately determining shear wave travel time in BE tests. Thereafter, BE tests were conducted to examine shear wave velocity in contaminated specimens. Based on the results, it was found that there was a critical value for crude oil content with the maximum shear wave velocity so that shear wave velocity of 4 wt% contaminated sand (Vs-4 wt%) was about 1.2 times higher than clean one (Vs-clean), and contrastingly adding further crude oil up to 6 wt% made a significant reduction in value of shear wave velocity to some extent that Vs-6 wt% was slightly lower than Vs-clean (Vs-6 wt% = 0.95–0.97Vs-clean). Moreover, adding more contaminant (8–12 wt%) into sand had negligible influences on shear wave velocity. In this paper, the effects of crude oil contamination on sand microstructure were also evaluated using scanning electron microscopy.", keywords = "Hydrocarbon contamination, Shear wave velocity, Ottawa sand, Bender element test, Resonant column test", author = "Hamid Rajabi and Mohammad Sharifipour", year = "2017", month = dec, doi = "10.1007/s10706-017-0274-0", language = "English", volume = "35", pages = "2727--2745", journal = "Geotechnical and Geological Engineering", issn = "0960-3182", publisher = "Springer Nature", number = "6", } . Geotechnical and Geological Engineering.

Rajabi, H., Sharifipour, M.(2017). An Experimental Characterization of Shear Wave Velocity (V<inf>s</inf>) in Clean and Hydrocarbon-Contaminated Sand . Geotechnical and Geological Engineering. 35. (6). p. 2727-2745.

Hamid Rajabi, Mohammad Sharifipour(2017). An Experimental Characterization of Shear Wave Velocity (V_s) in Clean and Hydrocarbon-Contaminated Sand . Geotechnical and Geological Engineering. 35. (6). p. 2727--2745.

Rajabi, H., Sharifipour, M.(2017). Effects of light crude oil contamination on small-strain shear modulus of Firoozkooh sand . European Journal of Environmental and Civil Engineering. p. 1-17.

PES mixed matrix nanofiltration membrane embedded with polymer wrapped MWCNT @article{8cd797957ac54f109a24edc4577fe524, title = "PES mixed matrix nanofiltration membrane embedded with polymer wrapped MWCNT: Fabrication and performance optimization in dye removal by RSM", abstract = "MWCNTs were wrapped by poly(sodium 4-styrenesulfonate) (PSS), and different amounts of raw and polymer wrapped MWCNTs were implemented to fabricate PES mixed matrix membranes by phase inversion method. Success of wrapping was probed by FTIR spectroscopy, and prepared membranes were characterized by SEM, AFM, porosity, and water contact angle measurements. Response surface methodology (RSM) was employed to optimize the permeate flux and dye removal efficiency of membranes with three variables of concentration, pH of dye solution, and membrane composition. A response surface (RS) with a D-optimal design was defined to build the mathematical model, minimize the number of experiments, and investigate the effect of parameters on the response. Adequacy of the obtained model was confirmed by means of variance analysis and additional experiments. Based on observed and predicted results, wrapping CNTs by PSS improved permeation flux and dye removal efficiency of MMMs. Validity of model was verified according to the good agreement between predicted and experimental results. Membrane mixed with 0.1 wt.% polymer wrapped MWCNTs offered the highest permeation flux as well as dye removal efficiency. According to the model response, in order to achieve a higher dye removal, an acidic pH and a moderate dye solution concentration are recommended. Additionally, basic solution pH (9.0) and a dilute dye solution are suggested to reach a higher permeation flux.", keywords = "Nanofiltration, Mixed matrix membrane, Polymer wrapped MWCNT, Dye removal, Response surface methodology (RSM)", author = "Negin Ghaemi and Madaeni, {Sayed S.} and Parisa Daraei and Hamid Rajabi and Tahereh Shojaeimehr and Farshad Rahimpour and Bita Shirvani", year = "2015", month = nov, day = "15", doi = "10.1016/j.jhazmat.2015.05.018", language = "English", volume = "298", pages = "111--121", journal = "Journal of Hazardous Materials", issn = "0304-3894", publisher = "Elsevier BV", } . Journal of Hazardous Materials.

Rajabi, H., Ghaemi, N., Madaeni, S.S., Daraei, P., Astinchap, B., Zinadini, S., Razavizadeh, S.H.(2015). Nano-ZnO embedded mixed matrix polyethersulfone (PES) membrane: Influence of nanofiller shape on characterization and fouling resistance . Applied Surface Science. 349. p. 66-77.

Hamid Rajabi, Negin Ghaemi, Sayed S Madaeni, Parisa Daraei, Bandar Astinchap, Sirus Zinadini, Sayed Hossein Razavizadeh(2015). Nano-ZnO embedded mixed matrix polyethersulfone (PES) membrane: Influence of nanofiller shape on characterization and fouling resistance . Applied Surface Science. 349. p. 66--77.

Ghaemi, N., Madaeni, S.S., Daraei, P., Rajabi, H., Zinadini, S., Alizadeh, A., Heydari, R., Beygzadeh, M., Ghouzivand, S.(2015). Polyethersulfone membrane enhanced with iron oxide nanoparticles for copper removal from water: Application of new functionalized Fe<inf>3</inf>O<inf>4</inf> nanoparticles . Chemical Engineering Journal. 263. p. 101-112.

Hamid Rajabi, Negin Ghaemi, Sayed S Madaeni, Parisa Daraei, Sirus Zinadini, Abdolhamid Alizadeh, Rouhollah Heydari, Mojtaba Beygzadeh, Sohrab Ghouzivand(2015). Polyethersulfone membrane enhanced with iron oxide nanoparticles for copper removal from water: Application of new functionalized Fe₃O₄ nanoparticles . Chemical Engineering Journal. 263. p. 101--112.

Hamid Rajabi, Negin Ghaemi, Sayed S Madaeni, Parisa Daraei, Tahereh Shojaeimehr, Farshad Rahimpour, Bita Shirvani(2015). PES mixed matrix nanofiltration membrane embedded with polymer wrapped MWCNT: Fabrication and performance optimization in dye removal by RSM . Journal of Hazardous Materials. 298. p. 111--121.

Ghaemi, N., Madaeni, S.S., Daraei, P., Rajabi, H., Shojaeimehr, T., Rahimpour, F., Shirvani, B.(2015). PES mixed matrix nanofiltration membrane embedded with polymer wrapped MWCNT: Fabrication and performance optimization in dye removal by RSM . Journal of Hazardous Materials. 298. p. 111-121.

Nanoclay embedded mixed matrix PVDF nanocomposite membrane @article{3b353eed63f54efc9fc04a5f5dd2e013, title = "Nanoclay embedded mixed matrix PVDF nanocomposite membrane: Preparation, characterization and biofouling resistance", abstract = "In this paper, nanocomposite PVDF/nanoclay membranes were prepared with addition of different concentrations of organically modified montmorillonite (OMMT) into the polymeric casting solution using combination of solution dispersion and phase inversion methods. Membranes were characterized by use of X-ray diffraction (XRD), water contact angle, scanning electron microscopy (SEM) and atomic force microscopy (AFM), and their performances were evaluated in terms of pure water flux and fouling parameters. The surface hydrophilicity of all nanocomposites markedly improved compared to nascent PVDF. In addition, XRD patterns revealed the formation of intercalated layers of mineral clays in PVDF matrix. SEM and AFM images showed that addition of OMMT resulted in nanocomposite membranes with thinner skin layer and higher porosity rather than PVDF membranes. Pure water flux of PVDF/OMMT membranes increased significantly (particularly for fabricated membranes by 4 and 6 wt.% OMMT) compared to that of PVDF membrane. Moreover, nanocomposite membranes showed the elevated antifouling properties, and flux recovery of nascent PVDF membranes increased from 51 to 72% with addition of 2 wt.% OMMT nanoparticles. These nanocomposite membranes also offered a remarkable reusability and durability against biofouling.", keywords = "Nanocomposite membranes, Poly(vinylidene fluoride) (PVDF), Nanoclay, Organically modified montmorillonite (OMMT), Biofouling", author = "Hamid Rajabi and Negin Ghaemi and Madaeni, {Sayed S.} and Parisa Daraei and Khadivi, {Mohammad Ali} and Monir Falsafi", year = "2014", month = sep, day = "15", doi = "10.1016/j.apsusc.2014.05.185", language = "English", volume = "313", pages = "207--214", journal = "Applied Surface Science", issn = "0169-4332", publisher = "Elsevier BV", } . Applied Surface Science.

Hamid Rajabi, Negin Ghaemi, Sayed S Madaeni, Parisa Daraei, Mohammad Ali Khadivi, Monir Falsafi(2014). Nanoclay embedded mixed matrix PVDF nanocomposite membrane: Preparation, characterization and biofouling resistance . Applied Surface Science. 313. p. 207--214.

Rajabi, H., Ghaemi, N., Madaeni, S.S., Daraei, P., Khadivi, M.A., Falsafi, M.(2014). Nanoclay embedded mixed matrix PVDF nanocomposite membrane: Preparation, characterization and biofouling resistance . Applied Surface Science. 313. p. 207-214.

Ghaemi, N., Madaeni, S.S., Alizadeh, A., Rajabi, H., Daraei, P., Falsafi, M.(2012). Effect of fatty acids on the structure and performance of cellulose acetate nanofiltration membranes in retention of nitroaromatic pesticides . Desalination. 301. p. 26-41.

Hamid Rajabi, Negin Ghaemi, Sayed S Madaeni, Abdolhamid Alizadeh, Parisa Daraei, Monir Falsafi(2012). Effect of fatty acids on the structure and performance of cellulose acetate nanofiltration membranes in retention of nitroaromatic pesticides . Desalination. 301. p. 26--41.

Preparation, characterization and performance of polyethersulfone/organically modified montmorillonite nanocomposite membranes in removal of pesticides @article{46ac29d44e674a99901a585abe54a130, title = "Preparation, characterization and performance of polyethersulfone/organically modified montmorillonite nanocomposite membranes in removal of pesticides", abstract = "Nanocomposite membranes containing polyethersulfone (PES) and organically modified montmorillonite (OMMT) were prepared by a combination of solution dispersion and wet-phase inversion methods and accordingly, the effect of OMMT addition to the properties and performance of fabricated nanofiltration membranes was investigated. The membranes were characterized by contact angle measurement, scanning electron microscopy (SEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), X-ray diffraction (XRD), mechanical strength evaluation, thermogravimetric analysis (TGA), and zeta potential. The performance of the membranes was elucidated by the removal of pesticides (nitrophenols (NPs)) in neutral and acidic pHs. The hydrophilicity of the membranes was strongly enhanced by increasing the OMMT concentration. The SEM and AFM images showed that addition of OMMT to the casting solution resulted in nano-structure membranes with a thinner skin layer and a smaller surface pore size. XRD patterns revealed the formation of intercalated and exfoliated layers of mineral clays in the PES matrix which was also confirmed by TEM images. The addition of OMMT improved the mechanical properties and thermal stability of the membranes. Moreover, the pure water flux, permeation and, rejection of NPs were significantly improved. The performance of fabricated NF membranes in removal of NPs varied depending on the solute and membrane properties as well as solution condition. Finally, a comparison between fabricated membranes and a commercial NF membrane (NF45, Dow Filmtec) proved that the OMMT addition is a convenient procedure for producing nanocomposite membranes with superior characterization and performance.", keywords = "Nanofiltration, Polymer-clay nanocomposite membranes, Organically modified Montmorillonite, Pesticide, Polyethersulfone", author = "Negin Ghaemi and Madaeni, {Sayed S.} and Abdolhamid Alizadeh and Hamid Rajabi and Parisa Daraei", year = "2011", month = oct, day = "15", doi = "10.1016/j.memsci.2011.08.004", language = "English", volume = "382", pages = "135--147", journal = "Journal of Membrane Science", issn = "0376-7388", publisher = "Elsevier BV", number = "1-2", } . Journal of Membrane Science.

Hamid Rajabi, Negin Ghaemi, Sayed Siavash Madaeni, Mahdieh Abolhasani, Gholamreza Zahedi(2011). Modeling the Presence of Humic Acid in Ultrafiltration of Xenobiotic Compounds: Elman Recurrent Neural Network . Chemical Engineering and Technology. 34. (11). p. 1891--1898.

Ghaemi, N., Madaeni, S.S., Abolhasani, M., Zahedi, G., Rajabi, H.(2011). Modeling the presence of humic acid in ultrafiltration of xenobiotic compounds: Elman recurrent neural network . Chemical Engineering and Technology. 34. (11). p. 1891-1898.

Ghaemi, N., Madaeni, S.S., Alizadeh, A., Rajabi, H., Daraei, P.(2011). Preparation, characterization and performance of polyethersulfone/organically modified montmorillonite nanocomposite membranes in removal of pesticides . Journal of Membrane Science. 382. (1-2). p. 135-147.

Hamid Rajabi, Negin Ghaemi, Sayed S Madaeni, Abdolhamid Alizadeh, Parisa Daraei(2011). Preparation, characterization and performance of polyethersulfone/organically modified montmorillonite nanocomposite membranes in removal of pesticides . Journal of Membrane Science. 382. (1-2). p. 135--147.

CONFERENCE PAPER

Containment of emerging VOC pollutants by biochar @inproceedings{7d8dda536be247969401b189cab9134e, title = "Containment of emerging VOC pollutants by biochar", abstract = "Air pollutants are known to be responsible for up to 8.9 million premature deaths per year across the world. Among the pollutions are, emerging organic pollutants such as volatile organic compounds (VOC) that pose significant global risk to human health and the environment. Contaminated lands by crude oil and petrochemical products are major source for the emission of VOCs in the world. Long-term solutions for remediation of VOC contaminations in soil and water are expensive and require advanced technologies. The challenge of access to affordable and practical solutions is particularly highlighted in the case of vast contaminated lands. Hence, the provision of a simple, affordable, easy-to-localise and environmentally sustainable solution is critical to contain the emission of harmful gases or contamination of the groundwater resources. This paper presents the results of a series of experimental investigations on efficiency and sustainability of biochar-based containment systems for VOC contaminated lands. A bespoke experimental setup was developed to study the kinetics of VOC sorption in biochar manufactured from a range of feedstock and pyrolysis temperatures. Sorption behaviour of pure and mixed VOC gases in biochar was investigated, and the effects of various parameters on the sorption capacity including material characteristics and environmental conditions were evaluated and dominant sorption mechanisms were identified. The results show that the uptake of VOC by biochar is mainly controlled by factors such as porous structure, surface chemistry and pore size distribution of adsorbents along with molecular properties of adsorbates. ", author = "{Hadi Mosleh}, Mojgan and Hamid Rajabi and Majid Sedighi", year = "2023", month = jul, day = "3", doi = "10.53243/ICEG2023-271", language = "English", volume = "1", pages = "162--168", booktitle = "Proceedings of the 9th International Congress on Environmental Geotechnics (9ICEG)", note = "9th International Congress on Environmental Geotechnics, ICEG2023 ; Conference date: 25-06-2023 Through 28-06-2023", } . Proceedings of the 9th International Congress on Environmental Geotechnics (9ICEG).

Hamid Rajabi, M H Mosleh, M Sedighi(2023). Containment of emerging VOC pollutants by biochar . Proceedings of the International Congress on Environmental Geotechnics. p. 162--168.

Dye Removal by PES Mixed Matrix Membrane Embedded with Polymer Wrapped MWCNT @inproceedings{1fcadca2085343f5a7be64269a541d5c, title = "Dye Removal by PES Mixed Matrix Membrane Embedded with Polymer Wrapped MWCNT", author = "Hamid Rajabi and Negin Ghaemi and Parisa Daraei", year = "2015", month = may, day = "22", language = "English", booktitle = "The Second Iran Membrane Conference, Tehran, Iran", } . The Second Iran Membrane Conference, Tehran, Iran.

Application of iron oxide/PES mixed matrix membranes in adsorptive removal of copper from water resource @inproceedings{3e3631b375bb4c9db365cc96f4311daf, title = "Application of iron oxide/PES mixed matrix membranes in adsorptive removal of copper from water resource", author = "Hamid Rajabi and Negin Ghaemi and Parisa Daraei", year = "2015", month = mar, day = "8", language = "English", booktitle = "In proceeding of Asian Nano Forum Congress (ANFC2015) 2015, Kish Island, Iran", } . In proceeding of Asian Nano Forum Congress (ANFC2015) 2015, Kish Island, Iran.

Effect of different modified Fe3O4 nanoparticles on adsorptive removal of copper from water using nano-enhanced membranes @inproceedings{840ab06a31fc4b838d55742f6d5f76ac, title = "Effect of different modified Fe3O4 nanoparticles on adsorptive removal of copper from water using nano-enhanced membranes", author = "Hamid Rajabi and Negin Ghaemi and Parisa Daraei", year = "2015", month = mar, day = "8", language = "English", booktitle = "In proceeding of Asian Nano Forum Congress (ANFC2015), Kish Island, Iran", } . In proceeding of Asian Nano Forum Congress (ANFC2015), Kish Island, Iran.

Effect of nano-ZnO shape on characterization and water flux of PES membrane @inproceedings{1f10eb46abde4f6c90ed716c88c4541f, title = "Effect of nano-ZnO shape on characterization and water flux of PES membrane", author = "Hamid Rajabi and Negin Ghaemi and Parisa Daraei and Madaeni, {Sayed Siavash}", year = "2015", month = feb, day = "17", language = "English", booktitle = "In proceeding of The 15th Iranian NationalCongress of Chemical Engineering (IChEC 2015), University of Tehran, Tehran, Iran,", } . In proceeding of The 15th Iranian NationalCongress of Chemical Engineering (IChEC 2015), University of Tehran, Tehran, Iran,.

Conventional methods to evaluate shear wave travel-time in laboratory tests @inproceedings{6a710adcb320468c83ff422ab0429c60, title = "Conventional methods to evaluate shear wave travel-time in laboratory tests", author = "Hamid Rajabi and Mohammad Sharifipour", year = "2014", month = dec, day = "4", language = "English", booktitle = "In proceeding of 1st National Congress on Soil Mechanics and Foundation Engineering Shahid Rajaee Teacher Training University, Tehran, Iran", } . In proceeding of 1st National Congress on Soil Mechanics and Foundation Engineering Shahid Rajaee Teacher Training University, Tehran, Iran.

Numerical modelling of confinement effects on failure pattern of brittle rocks @inproceedings{8e39e89b190c4a06800f35dae70264dd, title = "Numerical modelling of confinement effects on failure pattern of brittle rocks", author = "Hamid Rajabi", year = "2014", month = dec, day = "3", language = "English", booktitle = "In proceeding of 1st National Congress on Soil Mechanics and Foundation Engineering Shahid Rajaee Teacher Training University", } . In proceeding of 1st National Congress on Soil Mechanics and Foundation Engineering Shahid Rajaee Teacher Training University.

Hamid Rajabi, Mohammad Sharifipour(2014). Temporal and mathematical methods to evaluate shear wave travel-time in laboratory tests . In proceeding of 8thnational Congress on Civil Engineering (8NCCE), Babol Noshirvani University of Technology, Babol, Iran.

Hamid Rajabi, Negin Ghaemi, Sayed Siavash Madaeni, Abdolhamid Alizadeh, Parisa Daraei(2011). Performance of PES/OMMT nanocomposite membranes in the removal of nitroaromatic pesticide . In proceeding of 7th International Chemical Engineering Congress (IChEC), Kish Island, Iran.

Hamid Rajabi, Aliakbar Golshani(2010). Numerical Modeling of Confinement Effects on Mechanical Properties and Failure Pattern of Brittle Rocks in Triaxial Tests with PFC3D . Second Australasian Ground Control in Mining Conference 2010, Sydney, Australia, 23/11/10.

Hamid Rajabi(2009). Chemical stabilization of sandy soil using cement and lime . 2nd International Conference on New Technology of Construction Industry.

Hamid Rajabi(2009). Critical chain project management (CCPM) and total project cost management . In proceeding of 2ndinternational conference on New Technology of Construction Industry, Tehran, Iran.

BOOK

(2015). Advances in Membrane Technologies for Water Treatment . Elsevier

Hamid Rajabi, Negin Ghaemi, Sayed Siavash Madaeni(2015). Advances in Membrane Technologies for Water Treatment-Materials, Processes and Applications .

BOOK CHAPTER

Madaeni, S.S., Ghaemi, N., Rajabi, H.(2015). Advances in polymeric membranes for water treatment . Advances in Membrane Technologies for Water Treatment: Materials, Processes and Applications. p. 3-41.

Hamid Rajabi, S S Madaeni, N Ghaemi(2015). Advances in polymeric membranes for water treatment . 3--41Elsevier