Article
Engineering, Environmental
Yong-Le Dou, Xiu Yue, Chong-Jiang Lv, Akram Yasin, Bin Hao, Yuhong Su, Peng-Cheng Ma
Summary: This study synthesized a smart composite membrane with responsive wettability to pH and temperature by introducing a responsive copolymer. The membrane demonstrated high efficiency in separating different types of oil-water mixtures and surfactant-stabilized emulsions. Two membranes controlled by temperature and pH were designed to construct a logic AND gate for oil-water separation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Jiangyun Zhao, Yinglong Che, Shide Man, Minggang Shan, Xiaosan Song, Jianlin Liu, Bigui Wei
Summary: This study developed a pH-controllable quartz sand filter material that can switch between different wettability states. The material showed high adsorption capacity and separation efficiency, making it effective for separating oil/water mixtures and emulsions.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Materials Science, Textiles
Long Feng, Yimiao Hou, Qingqing Hao, Mingxing Chen, Shuo Wang, Xuemin Hu, Wenxiu Yang
Summary: This research developed three fabrics with pH-induced wettability transition for oil-water separation, showing excellent separation performance and photocatalytic degradation capabilities. The fabric coated with stearic acid/TiO2-Fe3O4 (FST) demonstrated superhydrophobic and hydrophilic properties in neutral and alkaline conditions, achieving consistent separation efficiency above 90%.
TEXTILE RESEARCH JOURNAL
(2022)
Article
Engineering, Chemical
Qian Sun, Jingcheng Du, Linghao Wang, Ayan Yao, Ziye Song, Linghao Liu, Dong Cao, Ji Ma, Weiwang Lim, Wen He, Shabi Ul Hassan, Cailong Zhou, Jiangtao Liu
Summary: In this study, a COF membrane with unique super-wettability was prepared using collected COF nanofibers by filtration assembly method. It showed controllable and switchable separation performance in oil/water separation field, achieving high separation efficiency and permeance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xingyu Lin, Yong Zhang, Ziteng Yang, Wenjian Yue, Ruoxin Zhang, Jie Qi, Hongsheng Lu
Summary: In this study, a smart quartz sand with controllable wettability was designed for efficient oil-water separation and water in oil emulsion separation. The quartz sand exhibited superhydrophobicity and hydrophilicity, maintaining separation performance under different pH conditions. It also demonstrated efficient demulsification and separation capacity, showing promising applicability in the field of oil recovery and oil quality improvement.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Textiles
Jinmei He, Jiehui Li, Lulu Liu, Qian Liu, Chen Yang, Xin Yang, Lei Peng, Xiaodan Jia, Mengnan Qu
Summary: The advanced application of superwettable surfaces with intelligent stimulus-responsive properties has created a new approach to designing controllable and effective oil-water separation materials. By utilizing a low-cost and eco-friendly method, a smart superwettable fabric with tunable wettability has been developed, showing excellent switchable surface properties based on pH values. This functionalized smart coating has potential as a promising candidate for oily wastewater remediation under various harsh settings.
FIBERS AND POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Jia Zhou, Jiahong Guo, Hui Yan, Jun Xiao, Jikui Wang
Summary: In this study, a superhydrophobic/superoleophilic ODP-TiO2 melamine sponge was fabricated, which exhibited a transition in wettability under UV light and excellent absorption capacities, selectivity, and recyclability for various oils, making it suitable for a wide range of oil/water emulsion separation applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Wang Zhiheng, Dai Yimin, Fang Chengqian, Chen Ling, Lu Qi, Li Yaqi, Cai Ling, Liu Bo, Zhang Yue-Fei, Li Yan, Wan Li
Summary: Smart oil-water separation materials with switchable wettability have been developed in this paper. A novel method using a pH-responsive melamine sponge has been developed, which can repeatedly switch between hydrophobic and hydrophilic states. The functionalized sponge with excellent 3D porous structure and smart wettability shows high separation efficiency in oil-water mixtures.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Cai Ling, Dai Yimin, Fang Chengqian, Wang Zhiheng, Li Yaqi, Yang Siwen, Wang Junlong, Liu Bo, Ding Xianglong, Zhang Yue-Fei, Li Yan, Wan Li
Summary: In this study, a novel and cost-effective approach is developed to produce a photothermal-responsive smart sponge. The resulting PCPO@PU exhibits switchable wettability controlled by the temperature response induced by the photothermal effect. The PCPO@PU shows excellent separation performance and can be recycled, making it a promising material for oil-water separation in marine environments.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Environmental Sciences
Ting-Ting Li, Shuxia Li, Fei Sun, Bing-Chiuan Shiu, Hai-Tao Ren, Ching-Wen Lou, Jia-Horng Lin
Summary: In this study, an intelligent pH-responsive nonwoven fabric with reversible wettability was prepared. It showed excellent performance in removing organic solvents and heavy metals from effluents, as well as selectively separating various oil/water mixtures under pH stimulus.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Chemical
Jian Chang, Chisiang Ong, Yusuf Shi, Jiayin Yuan, Zeyad Ahmed, Peng Wang
Summary: By grafting pH-responsive polymer and oleophilic/hydrophobic compound onto the surface of sand, a smart sand with recyclability and versatility was designed for controllable oil sorption and desorption, selective oil/water separation, offering an intelligent, low-cost, large-scale, and highly efficient solution to industrial oily wastewater and oil spill issues.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Jiajun Chen, Yimeng Ni, Yukui Gou, Tianxue Zhu, Lan Sun, Zhong Chen, Jianying Huang, Dapeng Yang, Yuekun Lai
Summary: Organogels have shown wide application prospects as adsorbent materials in the field of oil-water separation, with the ability to effectively treat oily wastewater in complex environments and high adsorption capacity and recyclability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Chemistry, Physical
Zetian Zhang, Guochen Dai, Yang Liu, Weiwei Fan, Kaifeng Yang, Zhengjun Li
Summary: The A-CFM, prepared through in-situ graft copolymerization, demonstrates high separation efficiency for both surfactant-free and surfactant-stabilized emulsions even after multiple cycles. The tunable wettability of A-CFM by altering pH value not only enhances recycling performance but also improves antifouling properties. Additionally, the analysis of oil-water separation mechanism indicates that hydrophobicity, capillary force, and electrostatic interactions play key roles in separating emulsions stabilized by ionic surfactants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Weiwei Sui, Huawen Hu, Yinlei Lin, Peng Yi, Lei Miao, Haichen Zhang, Haiying He, Guangji Li
Summary: The study has developed a material with pH responsiveness through dopamine coating and silver particle construction, which can efficiently achieve bidirectional oil-water separation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Ki-Yoon Kim, Ravi P. Srivastava, Dahl-Young Khang
Summary: In this study, wettability switching of membranes was achieved by structure control only, enabling effective oil-water separation. The fabricated isoporous membranes allowed for separation of oil-water mixtures with varying pore sizes, and demonstrated excellent efficiency and flux. Furthermore, the durability of the membranes was ensured due to the thermoset nature of the membrane material.
JOURNAL OF MEMBRANE SCIENCE
(2022)
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)