Article
Engineering, Chemical
Umair Baig, Abdul Waheed
Summary: A polymeric-inorganic nanocomposite membrane with self-cleaning properties was fabricated for treating water-containing emulsified oily feed. The membrane showed high separation efficiency and photocatalytic cleaning ability.
Review
Environmental Sciences
Syarifah Nazirah Wan Ikhsan, Norhaniza Yusof, Farhana Aziz, Ahmad Fauzi Ismail, Juhana Jaafar, Wan Norharyati Wan Salleh, Nurasyikin Misdan
Summary: The discharge of oily wastewater in industrial processes has significantly deteriorated water quality and posed negative impacts on human health. Traditional water treatment methods are inefficient and not applicable for oil/water emulsion separation, highlighting the urgent need for more efficient methods and materials to address this issue. Superwetting materials that repel oil while allowing water to pass through have been extensively researched to enable solid surfaces to separate oily emulsions with minimal energy consumption, showing promising potential for future applications in oily wastewater treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Chemical
Lia Vasquez, Katarzyna Dziza, Siew-Leng Loo, Vassilios Binas, Sofia Stefa, George Kiriakidis, Athanassia Athanassiou, Despina Fragouli
Summary: This paper reports the fabrication of multifunctional composite cryogels that can remove oil and dye from polluted water through gravity-driven filtration. The cryogels exhibit excellent adsorption capacity and photocatalytic self-cleaning property, maintaining good performance after multiple filtration cycles.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Parashuram Kallem, Ravi P. Pandey, Hanaa M. Hegab, Ruchi Gaur, Shadi W. Hasan, Fawzi Banat
Summary: In this study, a simple and eco-friendly approach was used to improve the wettability of the FO membrane substrate. By coating hydroxyl- and amino-functionalized TiO2 nanocomposites onto the substrate, the resulting TFC-FO membrane exhibited higher water flux and selectivity, as well as better fouling behavior with organic foulants. These findings demonstrate the significant potential of the fabricated TFC-FO membranes for sustainable water reclamation from oily wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Wirginia Tomczak, Marek Gryta
Summary: This study investigated the applicability of ultrafiltration ceramic membrane for separation of oily wastewaters in maritime transportation. It confirmed the excellent separation properties of the membrane, but also identified membrane fouling issues, which could be effectively cleaned using NaOH and H3PO4 solutions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Engineering, Environmental
Farah Abuhantash, Yazan H. Abuhasheesh, Hanaa M. Hegab, Isam H. Aljundi, F. Al Marzooqi, Shadi W. Hasan
Summary: The purification of oily wastewater is of significant importance for the environment and human health. Mixed matrix membranes (MMMs), which blend polymeric membranes with other polymers or nanomaterials, have shown better performance in treating oily wastewater compared to conventional techniques. Hydrophilic membranes have commendable oil rejection capabilities, while hydrophobic membranes exhibit high fouling resistance. Janus MMMs, with both hydrophilic and hydrophobic properties, have promising results in oily wastewater treatment. Challenges still remain in membrane fouling and recyclability, and researchers are exploring the use of sustainable and biodegradable polymers for MMMs.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Junwen Ding, Jinlong Wang, Xinsheng Luo, Daliang Xu, Yatao Liu, Peijie Li, Shirong Li, Rui Wu, Xinlei Gao, Heng Liang
Summary: This study proposed a novel strategy for controlling membrane fouling in continuous oily wastewater purification, which combined passive and active methods to reduce fouling. The addition of delta-MnO2 decoration layer and catalytic cleaning effectively improved the surface properties of the membrane, resulting in high water permeation flux and durable anti-oil-fouling performance. The membrane also showed high cleaning efficiency in the peroxymonosulfate (PMS) cleaning process.
Article
Chemistry, Physical
Yingqing Zhan, Guiyuan Zhang, Qingying Feng, Wei Yang, Jiaxin Hu, Xin Wen, Yucheng Liu, Shirui Zhang, Ao Sun
Summary: A durable super-wetting composite membrane was prepared for the synergistic treatment of oil-in-water emulsions and dye, showing stable super-wetting performance and separation efficiency under high-temperature and corrosive environments. This work provides an alternative platform for treating complicated oily wastewater in harsh environments.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Environmental
Chong Shen, Qian Zhang, Qin Meng
Summary: The hydrophilic hollow fiber membrane (HFM) prepared by grafting sulfobetaine methacrylate (SBMA) onto polysulfone (PSU) showed high efficiency in removing oil substances in wastewater and could completely recover flux through cleaning process.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Mengjiao Yan, Kangying Guo, Yue Gao, Qinyan Yue, Baoyu Gao
Summary: This study investigates the coagulation-ultrafiltration integrated process for oily wastewater treatment. It is found that polyaluminum chloride (PAC) is more effective than AlCl3 and Fe based coagulants. The PAC-PDMDAAC coagulation system forms large and loose flocs, indicating efficient removal of oil droplets.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Ghorbani, Mohammad Hassan Vakili, Elham Ameri
Summary: In this study, polymeric membranes were synthesized for separating oil/water emulsion in Iran's Mobarakeh steel company's effluent, and membranes containing silica nanoparticles showed better separation performance compared to those without.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Coatings & Films
Jingfang Zhu, Longyang Li, Zhixiang Zeng, Meng Dong, Haizhou Huang, Xiao Xie, Litao Sun
Summary: In this study, a robust self-similar under-liquid dual super-lyophobicity anti-fouling cement was reported. This material demonstrated stable underwater super-oleophobicity and under oil super-hydrophobicity through a simple mixture of cement and water. It not only possessed good mechanical robustness, but also exhibited excellent antifouling property. The material maintained its superlyophobic functionality even after mechanical damages.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Hajer Aloulou, Afef Attia, Wala Aloulou, Sudip Chakraborty, Lassaad Baklouti, Lasaad Dammak, Raja Ben Amar
Summary: This work aims to determine the optimized ultrafiltration conditions for the treatment of industrial wastewater with oil and heavy metals. A ceramic multitubular membrane was used for efficient removal, and statistical analysis and optimization techniques were applied to find the best operating conditions. The study also investigated the effect of concentration under the optimized conditions and estimated the fouling mechanism using Hermia's model. The efficiency of membrane regeneration was proved by testing water permeability after chemical cleaning.
Article
Engineering, Environmental
M. Monsefi Khosroshahi, Y. Jafarzadeh, M. Nasiri, M. Khayet
Summary: The synthesis of PEG-b-PDCE di-block copolymer and the preparation of PVC/PEG-b-PDCE blend membranes improved the membrane permeability and anti-fouling performance, showing promising applications in oily wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Zubaida Rukhsana Usha, Dafaalla M. D. Babiker, Yilei Zhao, Xin Chen, Liangbin Li
Summary: The use of advanced polymeric membrane-based separation technology with layer-by-layer modification technique has proven to be effective in preventing contaminations and achieving efficient water separation from oily wastewater. The modified membrane exhibits excellent superhydrophilic and underwater superoleophobic properties, leading to high separation efficiency and permeate flux. It also possesses antibacterial properties and can remove multiple pollutants from oily wastewater in an energy-efficient manner.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Polymer Science
Targol Hashemi, Mohammad Reza Mehrnia, Aydin Marandi, Ahmad Fauzi Ismail
Summary: Novel mixed matrix membranes were prepared using magnetic casting and nanocomposite technology, resulting in increased water flux and improved anti-fouling properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Furkan Turgut, Chun Yew Chong, Mustafa Karaman, Woei Jye Lau, Mehmet Gursoy, Ahmad Fauzi Ismail
Summary: In this study, two different monomers were used to modify graphene oxide (GO) nanosheets via an environmentally friendly plasma-enhanced method. The modified GOs were then used as nano-fillers for the development of a composite polyethersulfone ultrafiltration membrane with improved surface properties. The results showed that the membrane incorporated with hydrophilic-coated GOs achieved better oil rejection, antifouling resistance, and water recovery rate compared to the membrane incorporated with hydrophobic-coated GOs.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yanuardi Raharjo, Ahmad Fauzi Ismail, Mohd Hafiz Dzarfan Othman, Mochamad Zakki Fahmi, Saiful, Djoko Santoso, Mochamad Ifan Nugroho, Diana Merna, Maipha Deapati Arief, Risma Chikita Pratama
Summary: This study aimed to develop a novel imprinted zeolite (IZC) and incorporate it into a polyethersulfone (PES) and poly(vinyl pyrrolidone) (PVP) mixed matrix membrane (HF-MMM) for hemodialysis treatment. The optimized parameters showed that this membrane has the potential to effectively remove uremic toxins.
Article
Environmental Sciences
Noresah Said, Woei Jye Lau, Muhammad Nidzhom Zainol Abidin, Amir Mansourizadeh, Ahmad Fauzi Ismail
Summary: In this study, poly(citric acid)-grafted graphene oxide (PGO) was incorporated into single-layer hollow fiber (SLHF) and dual-layer hollow fiber (DLHF) membranes to improve their antifouling properties during water treatment. The optimized PGO loading of 0.7 wt% in SLHF membrane resulted in higher water permeability and bovine serum albumin rejection compared to the neat membrane. Similarly, introducing 0.7 wt% PGO only to the outer layer of DLHF membrane improved its antifouling properties and increased the rejection rate of bovine serum albumin to 97.7%.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Polymer Science
Kopano Edward Mokubung, Lloyd Njoka Ndlovu, Woei Jye Lau, Edward Ndumiso Nxumalo, Nozipho Nonsikelelo Gumbi
Summary: This study fabricated mixed matrix membranes (MMMs) for ultrafiltration using 3-aminopropyltriethoxysilane modified magnetite iron oxide nanoparticles (A-Fe3O4 NPs) through a modified phase inversion technique. The physiochemical properties and surface morphologies of the synthesized A-Fe3O4 NPs and fabricated MMMs were examined using advanced characterization techniques. The incorporation of higher loadings of A-Fe3O4 NPs in the membrane matrix significantly improved the adsorptive ability and hydrophilicity of the adsorbent, leading to improved membrane water permeance, adsorption rate, and adsorption-filtration properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
A. Sumisha, G. Arthanareeswaran, A. F. Ismail
Summary: This study mainly focuses on the analysis of casein protein transport characteristics through ultrafiltration membranes. Polysulfone-based polymer membranes modified with different materials are used. The experimental results show that the transport of casein is controlled by convection.
SEPARATION SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Wan Nur Ain Shuhada Abdullah, Nadiene Salleha Mohd Nawi, Woei Jye Lau, Yeek Chia Ho, Farhana Aziz, Ahmad Fauzi Ismail
Summary: In this study, a new type of nanofiltration (NF) membrane with a hydrophilic coated PAN/PPSU substrate was fabricated, aiming to improve membrane performance for water and wastewater treatment. The PAN/PPSU substrate with a weight ratio of 1:5 produced the TFC membrane with the highest water flux and divalent salt rejection. Furthermore, the introduction of a hydrophilic PDA/GO coating layer improved the water flux of the membrane without compromising salt rejection.
Article
Biochemistry & Molecular Biology
Kathleen Foo, Yong Yeow Liang, Woei Jye Lau, Md Maksudur Rahman Khan, Abdul Latif Ahmad
Summary: Desalination of high-salinity water, also known as hypersaline brine, is a method to address the issue of brine disposal. However, the energy consumption is high in hypersaline brine desalination due to the high operating pressure. A parametric analysis on a spiral wound membrane module was conducted to predict the performance of hypersaline brine desalination. The study found that a minimum inlet pressure of 75 bar is recommended to minimize energy consumption, and higher feed velocity can increase productivity without significantly increasing energy requirements. The efficiency of pressure recovery and pump play a crucial role in reducing specific energy consumption (SEC) in hypersaline brine desalination using spiral wound membrane, and utilizing them with high efficiencies (eta(R) >= 95% and eta(pump) >= 50%) can reduce SEC by at least 33% while achieving a comparable SEC with seawater reverse osmosis (SWRO) desalination (<5.5 kWh/m(3)).
Article
Biochemistry & Molecular Biology
En Qi Lim, Mei Qun Seah, Woei Jye Lau, Hasrinah Hasbullah, Pei Sean Goh, Ahmad Fauzi Ismail, Daryoush Emadzadeh
Summary: Many commercial nanofiltrations (NF) and reverse osmosis (RO) membranes were evaluated for their efficiency in removing phthalates from water sources. It was found that the NF3 membrane showed the best performance in removing phthalates regardless of pH, due to its surface properties and appropriate pore size. Additionally, the NF3 membrane exhibited higher water flux compared to the RO membranes. However, further research is needed to investigate the effects of other compounds on membrane performance.
Article
Engineering, Chemical
Komathi Kannathasan, Juhana Jaafar, Nuor Sariyan Suhaimin, Nurul Natasha Mohammad Jafri, Sadaki Samitsu, N. H. Alias, A. F. Ismail, T. Matsuura, M. H. D. Othman, Mukhlis A. Rahman, Farhana Aziz, Norhaniza Yusof, Mohammed Rasool Qtaishat, M. I. Ismail
Summary: A novel method of fabricating translucent photocatalytic membrane using a modified morphological structure as a photocatalyst has been developed. The study highlights the effect of translucency on the efficiency of photocatalytic reactions.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Environmental
Nor Akalili Ahmad, Lih Jang Tam, Pei Sean Goh, Nurfirzanah Azman, Ahmad Fauzi Ismail, Khairulnadzmi Jamaluddin, Gangasalam Arthanareeswaran
Summary: In this study, a thin film composite (TFC) reverse osmosis (RO) membrane with high long-term stability and antifouling properties was developed by spray coating the polyamide (PA) layer with oppositely charged titania nanosheets (TNS). The manufactured membranes showed improved permeability and radionuclide rejection, making them suitable for treating radionuclide-containing wastewater. The findings highlight the potential of tailored TFC RO membranes in the treatment of radioactive wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Noor Fauziyah Ishak, Nur Hidayati Othman, Najihah Jamil, Nur Hashimah Alias, Fauziah Marpani, Munawar Zaman Shahruddin, Lau Woei Jye, Ahmad Fauzi Ismail
Summary: Modifying polymeric membranes using ZIF-8 functionalized-2D nanofillers showed improved gas permeability and selectivity performance. The rGO/ZIF-8 and MoS2/ZIF-8 nanofillers were successfully synthesized and characterized. Addition of 10 wt% of each nanofiller to the PES solution resulted in MMMs with enhanced thermal stability. Compatibility between the 2D nanofillers and PES matrix was confirmed by FTIR and XRD analysis. The obtained MMMs exhibited significantly improved gas separation properties, demonstrating the potential of using 2D nanofillers for high-performance membranes.
PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Nurul Syazana Fuzil, Nur Hidayati Othman, Nur Hashimah Alias, Fauziah Marpani, Muhammad Shafiq Mat Shayuti, Munawar Zaman Shahruddin, Mohd Rizuan Mohd Razlan, Norazah Abd Rahman, Woei Jye Lau, Mohd Hafiz Dzarfan Othman, Ahmad Fauzi Ismail, Tutuk Djoko Kusworo, Anwar Ul-Hamid
Summary: In this study, the performance of membrane distillation (MD) was improved by coating MoS2-TiO2 on a PVDF-based hollow fiber membrane. The MoS2-TiO2/PP20 membrane showed enhanced hydrophobicity and porosity, leading to significantly improved MD performances. This work suggests that the MoS2-TiO2 coating can overcome the typical permeability/rejection rate trade-off effect and play a significant role in enhancing MD performances.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Engineering, Environmental
Nur Fajrina, Norhaniza Yusof, Ahmad Fauzi Ismail, Farhana Aziz, Muhammad Roil Bilad, Meshel Alkahtani
Summary: This article summarizes recent developments in membrane technology tailored for biogas upgrading, including the structure and classification of membrane materials as well as effective approaches to overcome the trade-off between permeability and selectivity. Additionally, other challenges are comprehensively discussed, and future research required to tackle biogas upgrading issues is projected.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
