Article
Engineering, Environmental
Hong-Yang Ren, Han Mao, Wen-Hui Jin, Jia-Min Wang, Liang Ma, Bing Wang
Summary: The ceramic membrane-ED-H/L pressure RO combined process was used to treat fracturing flowback fluid, with high removal efficiencies of TDS and COD. The decrease in membrane flux was caused by the formation of organic and inorganic composite. The removal efficiency of organic pollutants was positively correlated with operating voltage in ED, and further improved by RO operation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
MhdAmmar Hafiz, Alaa H. Hawari, Radwan Alfahel, Mohammad K. Hassan, Ali Altaee
Summary: This study compared the performance of nanofiltration and reverse osmosis technologies for the reclamation of ultrafiltered municipal wastewater for irrigation. The permeate from the reverse osmosis process met FAO standards at lower pressures, but did not comply with irrigation water standards at higher pressures in terms of chloride, sodium, and calcium concentrations.
Article
Engineering, Chemical
Jaewon Lee, Yeojin Shin, Chanhee Boo, Seungkwan Hong
Summary: Various industrial activities generate highly acidic wastewaters, posing a particular concern due to their large volume, environmental impact, and limited disposal options. Nanofiltration (NF) has the potential to provide energy-, cost-, and space-effective solutions for wastewater treatment at industrial sites.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Environmental Sciences
Jiaxin Liang, Tianqiao Xie, Yuanhui Liu, Qidong Wu, Yuhua Bai, Baicang Liu
Summary: This study proposed the use of fixed bed adsorption using granular activated carbon (GAC) combined with ultrafiltration (UF) for the treatment of shale gas flowback and produced water (SGFPW). The results showed that GAC fixed bed effectively removed dissolved organic carbon (DOC) and turbidity, mitigating membrane fouling. The integrated GAC fixed bed-UF process produced high-quality effluents that met water quality standards, making it an effective technology for SGFPW reuse.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Vilma Fernandez-Medrano, Beatriz Cuartas-Uribe, Maria-Amparo Bes-Pia, Jose-Antonio Mendoza-Roca
Summary: Tanneries produce wastewater with high concentrations of suspended solids, organic matter, and salts. Treatment and reuse of these effluents are important for water conservation and cost-saving. This study tested nanofiltration and reverse osmosis membranes and found that reverse osmosis may be the most feasible technique for water reuse in the tannery industry.
Article
Polymer Science
Guodong Zou, Bin Pan, Weiyao Zhu, Yuwei Liu, Shou Ma, Mingming Liu
Summary: Fracturing fluids are widely used in hydraulic fracturing of shale gas reservoirs, but the efficiency of fluid flowback is often less than 50%, which limits shale gas recovery. This study conducted microscopic experiments to simulate the flowback process of fracturing fluids in shale gas reservoirs and analyzed the mechanisms and factors affecting flowback/retention. The results showed that flowback efficiency is positively correlated with fluid concentration and gas driving pressure difference. The study also identified four mechanisms responsible for fluid retention and observed that flowback efficiency increases with higher capillary number. These findings contribute to the understanding of fracturing fluid flowback in shale gas reservoirs and provide guidance for reservoir development.
Article
Engineering, Chemical
Dong Wang, Jiaojiao Zhang, Jinmei Li, Wendong Wang, Ho Kyong Shon, Haoyong Huang, Yang Zhao, Zhining Wang
Summary: This study investigated the application of fertilizer drawn forward osmosis (FDFO) process for treating shale gas wastewater. It found that optimizing operational parameters can alleviate calcium sulfate and barium sulfate scaling issues, with the Aquaporin FO membrane exhibiting lower fouling tendency. Additionally, the effects of reverse salt diffusion on the scaling behavior of different salts in shale gas wastewater were analyzed.
Review
Engineering, Environmental
Hongrui Xiang, Xiaobo Min, Chong-Jian Tang, Mika Sillanpaa, Feiping Zhao
Summary: This review introduces the advantages of membrane separation method for heavy metal removal and summarizes the latest developments and applications of ultrafiltration, nanofiltration, reverse osmosis, and electrodialysis. The results indicate that membrane filtration methods have great potential for heavy metal removal.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Bahar Ozbey Unal
Summary: In recent years, wastewater reuse has become increasingly important in industrial zones. Reverse osmosis (RO) membranes are commonly used for this purpose, but membrane fouling is a significant issue, affecting membrane performance and lifespan. This study conducted an autopsy analysis of a fouled RO membrane from an industrial wastewater reuse plant in Turkey, revealing the presence of inorganic scaling and molybdenum contamination. An effective chemical cleaning protocol was suggested. This study provides insights into fouling control strategies for industrial wastewater reuse.
Article
Biochemistry & Molecular Biology
MhdAmmar Hafiz, Radwan Alfahel, Alaa H. Hawari, Mohammad K. Hassan, Ali Altaee
Summary: Municipal treated wastewater can be used for food crop irrigation, with nanofiltration and a hybrid FO-RO system being more efficient for enhancing water quality to meet irrigation standards.
Review
Environmental Sciences
Bin Tan, Zhengming He, Yuchun Fang, Lizhong Zhu
Summary: This review focuses on the concentration and chemical composition of organic matter in shale gas flowback and produced water (FPW) in China, as well as the hazards of organic pollutants. Organic removal techniques, including advanced oxidation processes, coagulation, sorption, microbial degradation, and membrane treatment, are systematically reviewed. The influences of high salt on each technique are highlighted. The study concludes that integrated coagulation-sorption-Fenton-membrane filtration represents a promising treatment process for FPW.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Agata Egea-Corbacho, Santiago Gutierrez, Dolores Coello, Jose Maria Quiroga
Summary: Evaluation of technology suitability should consider removal efficiency, energy costs, and personnel availability. Wastewater volume and intended use are crucial factors in technology selection. Membrane technologies and intermittent filters have shown effectiveness in removing emerging contaminants, with differences in water treatment capacity and energy consumption.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Energy & Fuels
Jinyuan Guo, Wei Guo, Lixia Kang, Xiaowei Zhang, Jinliang Gao, Yuyang Liu, Ji Liu, Haiqing Yu
Summary: Through machine learning analysis of a large amount of original geological, engineering, and dynamic data, the characteristics of hydraulic fracturing fluid flowback were systematically studied. A new indicator, single-cluster flowback ratio, was proposed based on data analysis and random forest forecasting. This indicator has better learnability and predictability. The main controlling factors of production and flowback ratio were also analyzed. This study provides a fundamental reference for analyzing the hydraulically fracturing fluid flowback for shale gas reservoirs.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Environmental Sciences
Marcus Verhuelsdonk, Karl Glas, Harun Parlar
Summary: The study investigated the long-term performance of a modular pilot scale plant reusing brewery wastewater, achieving drinking water quality. Economic estimation showed that reusing brewery wastewater can be economically viable in 77.2% of simulated cases, with the strongest dependency on costs for wastewater disposal.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Review
Environmental Sciences
Faryal Fatima, Hongbo Du, Raghava R. Kommalapati
Summary: Membrane technology, including MF, UF, NF, and RO, has been widely adopted for treating poultry slaughterhouse wastewater due to its excellent performance in pollutant removal, water recovery, and nutrient reuse, offering an economically efficient solution for purifying and reusing water in poultry processing.
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)