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Enhanced peroxi-coagulation process for the treatment of anaerobically-treated palm oil mill effluent (POME)

Journal of Industrial and engineering Chemistry 2025年

作者： Ismail, Saiyidah Anisah Ang, Wei Lun Mahmoudi, Ebrahim Mohammad, Abdul Wahab Wong, Wai Yin Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Chemical and Water Desalination Engineering Program College of Engineering University of Sharjah Sharjah27272 United Arab Emirates Fuel Cell Institute Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia

This study investigated the effectiveness of the peroxi-coagulation (PC) process in removing dissolved organic impurities from palm oil mill effluent (POME). Key experimental parameters assessed in this study included wastewater pH, electrolysis duration, and the dosage of H2O2. After a five-hour treatment period, maximum breakdown of organic contaminants and removal of suspended particles were achieved, with around 86 % of soluble COD (SCOD), 91 % of total COD (TCOD), 99 % of true colour, and 84 % of turbidity were removed under optimal operating conditions (pH 3 and external dosing of 31.09 mM H2O2). These outcomes can be attributed to two removal mechanisms: the predominant Fenton oxidation reaction at low pH which promoted effective •OH generation from the dosed H2O2, and the simultaneous coagulation activity by the electrochemically produced Fe(OH)3 coagulant. This PC process was governed by the pseudo-first-order kinetic model, which achieved a maximum kinetic rate of 0.5321 min−1 under ideal operating conditions. The estimated energy consumption for POME degradation ranged from 0.461 to 1.874 kWh per kg of COD reduced, indicating low electrical energy intake. These findings demonstrate the potential of the PC process as a pre- or post- treatment step that can enhance the removal of COD and pigmentation in integrated POME treatment systems. © 2025 The Korean Society of Industrial and engineering Chemistry

关键词： Coagulation

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Methacrylic Acid (MAA)-chemical Grafted Polyethersulfone Nanofiltration Membrane for Forward Osmosis Application

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Macromolecular Symposia 2025年第1期414卷

作者： Ab Aziz, Siti Nudra Shafinie Abu Seman, Mazrul Nizam Tuan Chik, Syed Mohd Saufi Mohammad, Abdul Wahab Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Lebuh Persiaran Tun Khalil Yaakob Gambang Kuantan Pahang Pekan26300 Malaysia Universiti Malaysia Pahang Al-Sultan Abdullah Lebuh Persiaran Tun Khalil Yaakob Kuantan Gambang Pahang Pekan26300 Malaysia Chemical and Water Desalination Program College of Engineering University of Sharjah Sharjah27272 United Arab Emirates

This study successfully modifies NF2 PES membrane via chemical grafting with methacrylic acid (MAA) at predetermined monomer concentrations, reaction times, and initiator concentrations by means of producing forward osmosis (FO) membrane. The membranes are utilized in the FO system, and performance is discussed in terms of water and solute flux. The surface characteristics of the modified membrane are analyzed in terms of water contact angle, functional groups, and degree of grafting (DG), meanwhile, morphological studies are analyzed via AFM and FESEM characterization. Based on the FO test performance, it can be concluded that increasing monomer concentration results in an increase in the permeate fluxes until a certain value is reached;only then does the permeate flux start to decrease. However, the effect of monomer concentrations is not significant on the permeate flux when shorter reactions are applied. This is probably due to the limitation of reaction time, which only allows certain values at a time for co-polymerization to be completed, hence affecting the permeate flux. Increasing reaction time offers more reactions to occur, leading to more surface grafting activity. However, prolonging the reaction time does not always improve the surface grafting, especially when higher monomer concentration and initiator concentration are involved. © 2025 Wiley-VCH GmbH.

关键词： Monomers

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Navigating the nuclear tide: A comprehensive review of challenges, opportunities, and advances in managing marine contamination by radioactive contaminants

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Marine Pollution Bulletin 2025年 217卷 118113页

作者： Giwa, Adewale Eniola, Jamiu O. Salem, Ayesha Bilal Alshamsi, Aysha Ali Omar, Kinda Amin Alnuaimi, Noor Saleh Al-Fahad, Sara Ghazwan Rashed, Lulwa Ammar Chemical and Water Desalination Engineering Program Department of Mechanical and Nuclear Engineering University of Sharjah P.O. Box 27272 Sharjah University City United Arab Emirates Civil and Environmental Engineering Department Khalifa University Abu Dhabi United Arab Emirates

Since the 2011 Fukushima Daiichi Nuclear Power Plant (FDNPP) disaster, which resulted in the widespread release of radionuclides into the marine environment, there have been ongoing concerns about the long-term ecological and human health risks associated with such events. This review investigates the sources, transport mechanisms, and environmental impacts of key radionuclides, including cesium-137, strontium-90, plutonium isotopes, and tritium, which persist in marine ecosystems. The economic consequences of contamination and gaps in enforcement highlight the need for robust regulatory frameworks. Advancements in nuclear wastewater treatment technologies are explored, focusing on adsorption, membrane filtration, bioremediation, phytoremediation, ion exchange, the Advanced Liquid Processing System (ALPS), and hybrid approaches. Adsorption using nanomaterials, mesoporous silica, and waste-based adsorbents demonstrates high radionuclide removal efficiency, while membrane technologies such as reverse osmosis and forward osmosis offer promising solutions, particularly for tritium separation. Hybrid systems integrating adsorption and membrane filtration emerge as the most effective treatment strategies due to their scalability and enhanced radionuclide recovery. A comparative SWOT analysis underscores the advantages and limitations of each technology, emphasizing the need for continued research into real-world applications, predictive modeling, and continuous monitoring. The review also examines advanced modeling techniques, including hydrodynamic simulations and radionuclide diffusion models, to assess contaminant dispersion and bioaccumulation patterns. Additionally, international regulatory frameworks, including guidelines from the International Atomic Energy Agency (IAEA) and national policies on nuclear wastewater disposal, are analyzed. Case studies from the Haiyang and Pilgrim Nuclear Power Stations provide practical insights into treatment applications and risk

关键词： Marine pollution

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Innovative Synthesis of Aluminum Oxide Impregnated Carbon Nanotube Membranes for Effective Cr(VI) Removal

Innovative Synthesis of Aluminum Oxide Impregnated Carbon Na...

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2024 International Conference on Sustainable Energy: Energy Transition and Net-Zero Climate Future, ICUE 2024

作者： Ihsanullah, I. College of Engineering University of Sharjah Chemical and Water Desalination Engineering Program Sharjah27272 United Arab Emirates

ISBN: (数字)9798331517076

ISBN: (纸本)9798331517076

A facile method of synthesizing aluminum oxide-impregnated carbon nanotubes membrane is reported. In the first step, various loadings (1 to 20%) of aluminum oxide (Al2O3) were impregnated on the surface of multiwall carbon nanotubes (MWCNTs). In the second step, the impregnated MWCNTs were compacted at 200-300MPa and sintered at 1200-1400°C to procedure the disk-shaped membrane. The fabricated membranes have the advantage of producing a network of tightly held CNTs that can utilize the excellent properties of nanotubes for applications in water treatment. The fabricated membranes were employed for the removal of Cr(VI) ions from a large volume of water in a continuous filtration setup. The effect of Al2O3 loadings on the characteristics of the prepared membrane was also evaluated. Membrane with 10% Al2O3 content exhibited better Cr(VI) ions removal. © 2024 IEEE.

关键词： Multiwalled carbon nanotubes (MWCN)

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Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(Ⅵ) adsorption from aqueous solution

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Chinese Journal of chemical engineering 2024年第9期73卷 51-61页

作者： Alireza Nouri Siew Fen Chua Ebrahim Mahmoudi Abdul Wahab Mohammad Wei Lun Ang Department of Chemical and Process Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi 43600Malaysia Centre for Sustainable Process Technology(CESPRO) Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi 43600Malaysia Chemical and Water Desalination Engineering Program College of EngineeringUniversity of SharjahSharjah 27272United Arab Emirates

Confronting the severe health threats and environmental impacts of Cr(Ⅵ) in aquatic environments demands innovative and effective remediation approaches. In this study, Graphene oxide(GO)-decorated poly(dimethyl amino ethyl methacrylate)(PDMAEMA) brush nanocomposites(GOP1, GOP2, GOP3, and GOP4) were fabricated using atom transfer radical polymerization(ATRP) by the “graft from” *** resulting nanocomposites were utilized for removing Cr(Ⅵ) with good adsorption performance due to the electrostatic interaction of protonated nitrogen groups in the brush chains with negatively charged particles in the solution. The kinetic model of pseudo-second-order best represented the contaminants' adsorption characteristics. The Weber-Morris model further indicated that surface adsorption and intraparticle diffusion mechanisms primarily controlled the adsorption procedure. Additionally, the Langmuir and Temkin isotherm models were found to most accurately represent the adsorption characteristics of the pollutants on the nanocomposites, and GOP4 can achieve the maximum adsorption capacity of 164.4 mg·g^(-1). The adsorbents' capacity maintains above 85% after five cycles of adsorption-desorption. The nanocomposites in this study demonstrate promising potential for eliminating Cr(Ⅵ) from aqueous solutions.

关键词： Graphene oxide PDMAEMA brush Polymerization Nanoparticles Adsorption Chromium

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Emerging magnetic MXenes in water treatment, desalination, and resource recovery: Advances, challenges, and prospects

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Separation and Purification Technology 2025年 372卷

作者： Ihsanullah, I. Bilal, Muhammad Sajid, Muhammad Chemical and Water Desalination Engineering Program College of Engineering University of Sharjah Sharjah27272 United Arab Emirates Department of Chemical and Biological Engineering Monash University ClaytonVIC3800 Australia Applied Research Center for Environment and Marine Studies Research Institute King Fahd University of Petroleum and Minerals Dhahran31261 Saudi Arabia

MXenes are a class of two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides that have gained significant attention due to their outstanding physicochemical properties. Among their derivatives, magnetic MXene-based composites have emerged as promising candidates for a wide range of environmental applications. Their effectiveness is attributed to features such as high specific surface area, tunable interlayer spacing and surface chemistry, abundant active sites, and ease of functionalization into magnetic nanostructures. This review critically assesses the potential of magnetic MXenes in environmental remediation, with particular emphasis on water treatment, desalination, and resource recovery. The applications discussed include the removal of hazardous dyes, heavy metals, radionuclides, nutrients, and pharmaceuticals, along with the catalytic degradation of persistent organic pollutants. The potential of these materials for oil recovery and desalination is also examined. Key factors such as regeneration capability, long-term stability, and adsorption selectivity are analyzed in depth. Special attention is given to their performance in real water matrices, underscoring their applicability in practical scenarios. Furthermore, this review summarizes reported studies on life cycle assessment (LCA), environmental impacts, and toxicity to provide a comprehensive perspective on the sustainable use of MXenes. Finally, existing challenges associated with the use of magnetic MXenes are highlighted, along with proposed strategies to address them. © 2025 Elsevier B.V.

关键词： Surface chemistry

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MXene:From synthesis to environment remediation

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Chinese Journal of chemical engineering 2023年第9期61卷 260-280页

作者： Ali Nikkhah Hasan Nikkhah Hadis langari Alireza Nouri Abdul Wahab Mohammad Ang Wei Lun Ng law Yong Rosiah Rohani Ebrahim Mahmoudi Department of Chemical and Process Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi 43600Malaysia Department of Mechanical and Aerospace Engineering University at BuffaloBuffaloUSA Department of Chemical and Biomolecular Engineering University of ConnecticutStorrsUSA Department of Chemistry and Medicinal Chemistry University at BuffaloBuffaloUSA Chemical and Water Desalination Engineering Program College of EngineeringUniversity of SharjahSharjah 27272United Arab Emirates Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul RahmanJalan Sungai LongBandar Sungai LongKajangSelangorMalaysia

A new burgeoning family of two-dimensional(2D)transition metal carbides/nitrides,better known as MXenes,have received extensive attention because of their distinct properties,such as metallic conductivity,good hydrophilicity,large surface area,good mechanical stability,and *** 40 different MXenes have been synthesized,and dozens more structures and properties have been theoretically ***,the recent progress in MXenes development is not well covered in chronological order based on different *** review article focuses on emerging synthesis methods,the properties of MXenes,and mainly the applications of MXenes and MXene-based material family in environmental remediation,a comprehensive review of gaseous and aqueous pollutants treatment.

关键词： MXene 2D materials Wastewater treatment CO_(2)capture Adsorption Photodegradation

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Influence of dope composition of polyethersulfone membrane blend with cellulose nanocrystal and carboxylated multi-walled carbon nanotube on humic acid rejection 6

Influence of dope composition of polyethersulfone membrane b...

引用

6th National Conference on Postgraduate Research, NCON-PGR 2022

作者： Mahmud, Nor Azura C. Abu Seman, Mazrul Nizam Takriff, Mohd Sobri Ang, Wei Lun Saufi, Syed M. Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuhraya Persiaran Tun Khalil Yaakob Gambang Kuantan Pahang26300 Malaysia Chemical and Water Desalination Engineering Program College of Engineering United Arab Emirates Department of Chemical & Process Engineering Faculty of Engineering & Built Environment Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia

A full factorial experimental design was employed to investigate the dope composition of a membrane made of cellulose nanocrystal (CNC), multi-walled carbon nanotube (MWCNT), and polyethersulfone (PES) for its ability to reject humic acid (HA). Four factors were screened, including PES composition, polyvinylpyrrolidone content, CNC content, and carboxylated MWCNT content. The membranes were tested for HA rejection using a 10-ppm aqueous feed solution. The results indicated that the percentage of MWCNT had the most significant impact, contributing 72.31% to the overall contribution. The fabricated membranes exhibited high HA removal capacity of up to 90% for the membrane embedded with MWCNT. The model's predicted values agreed reasonably with the experimental data, indicating the model's validity. This study provides insights into the development of CNC/MWCNT/PES membranes for efficient HA rejection in water treatment applications. © 2022 Elsevier Ltd. All rights reserved.

关键词： Nanoclay

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Co-Al layered double oxide activated carbon composite for eliminating lead ions from water

Co-Al layered double oxide activated carbon composite for el...

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2023 Sharjah International Conference on Physics of Advanced Materials, SICPAM 2023

作者： Abushawish, Alaa Chatla, Anjaneyulu Almanassra, Ismail W Shanableh, Abdallah Atieh, Muataz Ali Research Institute of Sciences & Engineering University of Sharjah Sharjah27272 United Arab Emirates Department of Civil and Environmental Engineering University of Sharjah Sharjah27272 United Arab Emirates Chemical and Water Desalination Engineering Program College of Engineering University of Sharjah Sharjah27272 United Arab Emirates

In the current study, preparation of cobalt-aluminum layered double oxide doped activated carbon (Co-Al LDO/AC) was achieved by the co-precipitation technique and utilized for the remediation of lead (Pb2+) from water. Various methods were employed to examine the properties of the composite material, including BET, XRD, FTIR, SEM, and EDS analysis. The material characterization outcomes indicated that the LDO structure was successfully incorporated into the AC matrices with a surface area of 189.4 m2/g. The influence of adsorption parameters including Co-Al LDO/AC dosage, period of contact, initial Pb2+ loading, and initial solution pH were investigated. Moreover, the isotherm and kinetic models were investigated to provide a deeper understanding of the elimination mechanism of Pb2+ ions. The adsorption results illustrated that pH has a substantial influence on Pb2+ removal with a highest removal effectiveness at pH = 6 and a fast adsorption rate within 7 h. The kinetic data were well aligned with the pseudo-second-order model while the isotherm data obeyed the Sips model (R2>0.966). The highest adsorption uptake, estimated by the Sips model was 25.09 mg/g. Considering the modeling and characterization of the spent Co-Al LDO/AC, a chemical interaction process was involved in the elimination process and mainly controlled by ion exchange, electrostatic interactions, and surface complexation mechanisms. Accordingly, the Co-Al LDO/AC could have great potential as a promising hybrid for the purification of toxic Pb2+ ions from contaminated water streams. © Published under licence by IOP Publishing Ltd.

关键词： Ions

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Effects of superhydrophobic sand mulching on evapotranspiration and phenotypic responses in tomato (Solanum lycopersicum) plants under normal and reduced irrigation

Plant-Environment Interactions

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Plant-Environment Interactions 2022年第2期3卷 74-88页

作者： Odokonyero, Kennedy Gallo, Adair Dos Santos, Vinicius Mishra, Himanshu Environmental Science and Engineering Program Biological and Environmental Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Water Desalination and Reuse Center (WDRC) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Chemical Engineering Program Physical Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia

Irrigated agriculture in arid and semi-arid regions is a vital contributor to the global food supply. However, these regions endure massive evaporative losses that are compensated by exploiting limited freshwater resources. To increase water-use efficiency in these giga-scale operations, plastic mulches are utilized;however, their non-biodegradability and eventual land-filling renders them unsustainable. In response, we have developed superhydrophobic sand (SHS) mulching technology that is comprised of sand grains or sandy soils with a nanoscale coating of paraffin wax. Here, we investigate the effects of 1 cm-thick SHS mulching on the evapotranspiration and phenotypic responses of tomato (Solanum lycopersicum) plants as a model system under normal and reduced irrigation inside controlled growth chambers. Experimental results reveal that under either irrigation scenario, SHS mulching suppresses evaporation and enhances transpiration by 78% and 17%, respectively relative to the unmulched soil. Comprehensive phenotyping revealed that SHS mulching enhanced root xylem vessel diameter, stomatal aperture, stomatal conductance, and chlorophyll content index by 21%, 25%, 28%, and 23%, respectively, in comparison with the unmulched soil. Consequently, total fruit yields, total dry mass, and harvest index increased in SHS-mulched plants by 33%, 20%, and 16%, respectively compared with the unmulched soil. We also provide mechanistic insights into the effects of SHS mulching on plant physiological processes. These results underscore the potential of SHS for realizing food–water security and greening initiatives in arid regions. © 2022 The Authors. Plant-Environment Interactions published by New Phytologist Foundation and John Wiley & Sons Ltd.

关键词： chlorophyll content index evapotranspiration food–water security mulching Solanum lycopersicum stomatal conductance superhydrophobic sand transpiration efficiency

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