Article
Engineering, Chemical
Tong Wu, Hanyu Wu, Xunda Feng, Shuangjiang Luo, Minghong Wu, Yizhou Zhang
Summary: Protonation-regulated interfacial polymerization using phosphate saline buffer can create ultra-thin, highly charged polyamide membranes with excellent permeation performance and anti-scaling and anti-fouling characteristics. This method allows for tailored membrane functionality and enables their use in water purification under various water conditions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Mengjiao Xia, Wentian Zhang, Yanchao Xu, Hongjun Lin, Yang Jiao, Liguo Shen, Renjie Li, Meijia Zhang, Huachang Hong
Summary: In this study, a facile and controllable one-pot synthesis of novel ZIF-8@TA core-shell NPs was demonstrated. These NPs were used as an interlayer in polyamide nanofiltration membranes. Compared with single-component interlayers, the novel ZIF-8@TA interlayer showed improved dispersion and hydrophilicity, resulting in enhanced performance of the polyamide membranes.
Article
Chemistry, Physical
Lixue Liu, Ling Yu, Baoleerhu Borjigin, Qinyi Liu, Changwei Zhao, Deyin Hou
Summary: The optimized beta-CD/TMC membrane, fabricated through interfacial polymerization, showed high pure water flux and efficient dye/salt separation performance, with high rejections for dyes and low rejection for NaCl. Additionally, the membrane exhibited good stability, retaining 82.9% of the initial flux after 16 hours of filtration, indicating its great potential in salt-containing dye wastewater treatment with improved selectivity for dye/salt separation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yu Fang, Cheng-Ye Zhu, Hao-Cheng Yang, Chao Zhang, Zhi-Kang Xu
Summary: This study demonstrates the advantages of vacuum-assisted interfacial polymerization (VAIP) in fabricating polyimide nanofiltration membranes. By using vacuum filtration, aqueous solutions of PIP can be evenly distributed on different microfiltration substrates, leading to the fabrication of uniform and ultra-thin polyamide layers with excellent performance. The membranes exhibit high rejection rates and water permeance, as well as satisfactory long-term stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Lulu Qian, Chengyu Yuan, Xu Wang, Haiguang Zhang, Lei Du, Gaoliang Wei, Shuo Chen
Summary: In this study, a MXene ultrafiltration membrane with good electroconductivity and hydrophilicity was prepared and exhibited excellent fouling resistance. Under external voltage, the fluxes were significantly improved during the treatment of raw water containing bacteria, natural organic matter (NOM), and coexisting bacteria and NOM. Moreover, the membrane also showed improved performance in the treatment of actual surface water, with increased flux and TOC removal. The MXene membrane demonstrated great potential in advanced water treatment due to its excellent antifouling ability.
Article
Engineering, Chemical
Yuchen Du, Biplob Kumar Pramanik, Yang Zhang, Veeriah Jegatheesan
Summary: Beta-cyclodextrin (beta-CD) and tannic acid (TA) were used as an organic phase, and zeolitic imidazolate framework-8 (ZIF-8) was added to synthesize nano-filtration (NF) membranes with trimesoyl chloride (TMC) as a monomer. The study investigated the effects of monomer concentration, substrate morphology, and reaction temperature on membrane performance. The results showed that the membranes had the highest selectivity for salts when the concentrations of beta-CD and TA were both 1 wt%, and a 10-fold increase in TMC concentration optimized membrane selectivity and flux. The introduction of ZIF-8 increased membrane roughness, decreased removal rate of monovalent salts, and resulted in higher salt selectivity and flux.
Article
Polymer Science
Priyanka Dobariya, Ashwini Kaushik, Karan Marvaniya, Ashish Maurya, Soyeb Pathan, Shilpi Kushwaha, Ketan Patel
Summary: Polymeric membranes with enhanced permeability and selectivity are desired for liquid separation. An interfacial polymerization reaction between phloroglucinol and 1,3,5-trimesyol chloride was used to form a defect-free polymeric layer with thin, narrow pores and a surface charge to maximize membrane performance. The polymeric nanofilm showed high water permeance and rejection of molecules and multivalent ions.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Engineering, Environmental
Shao-Chun Wu, Yan Chen, Xi Yan, Xiao-Jing Guo, Wan-Zhong Lang
Summary: ZIF-8/WS2 composite membranes with high permeance and excellent stability in organic solvents were constructed by growing ZIF-8 nanoparticles in the WS2 membrane. The membranes showed remarkable stability in organic solvents and have potential applications in organic solvent nanofiltration.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Multidisciplinary Sciences
Huawen Peng, Kaicheng Yu, Xufei Liu, Jiapeng Li, Xiangguo Hu, Qiang Zhao
Summary: Researchers solved the problems of susceptibility to chlorine degradation and low permeance in current polyamide lithium extraction nanofiltration membranes by designing a new quaternized-spiro piperazine monomer and translating its beneficial properties into large-area membranes. The new membranes have high permeance and chlorine resistance, and their performance is stable even after 400 hours of immersion in sodium hypochlorite. The high performance is attributed to the spiral conformation and secondary amine structures of the monomer.
NATURE COMMUNICATIONS
(2023)
Review
Environmental Sciences
S. Elakkiya, G. Arthanareeswaran, A. F. Ismail, P. S. Goh, Lukka Y. Thuyavan
Summary: Membrane technology, especially nanofiltration, is crucial for water treatment, and the use of biomaterials and nanomaterials has provided new opportunities for membrane development. Understanding membrane characteristics is essential for optimizing performance and reducing fouling. Despite advancements in membrane technology, challenges in commercialization and large-scale applications still exist, requiring further research in this field.
ENVIRONMENTAL RESEARCH
(2021)
Article
Multidisciplinary Sciences
Yang Lu, Ruoyu Wang, Yuzhang Zhu, Zhenyi Wang, Wangxi Fang, Shihong Lin, Jian Jin
Summary: The study shows that the formation of NaCl crystal dendrites in TFC-PA nanofiltration membranes significantly increases water flux without compromising solute rejection, due to the reduced physical binding between the active layer and the support layer caused by the formation of crystal dendrites.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Engineering, Environmental
Krishanu Bhowmick, Sanjukta Roy, Subhamoy Bhowmick, Rachna Jain, Swachchha Majumdar, Ganesh C. Sahoo, Priyanka Mondal
Summary: In this study, positively charged ceramic-supported polymeric membranes were fabricated and characterized for their structure and performance. The membranes showed good water permeability, high rejection rates for salts and heavy metals, as well as excellent anti-fouling and antibiofouling properties. They have potential applications in wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Ning Cao, Ziyu Lin, Ruiyin Sun, Liyuan Chen, Jinhui Pang, Zhenhua Jiang
Summary: This study introduces stable and crosslinked GO membranes based on SPEEK substrates through PEI repairing, addressing the challenges of GO membranes' swelling and interlayer defects. These membranes exhibit high flux and good separation performance in organic solvents, along with long-term stability.
Article
Engineering, Chemical
Ming-yue Zhang, Xin-ping Wang, Rijia Lin, Yi Liu, Fu-shan Chen, Lian-sheng Cui, Xiang-min Meng, Jingwei Hou
Summary: In this study, a ZIF-8 nanocomposite membrane with satisfactory hydrostability was prepared by depositing a series of composite ZIF-8 thin film containing DNA molecules on dopamine-modified polysulfone substrates. The DNA-containing ZIF-8 membrane exhibited higher water flux, better water stability, higher rejections for organic dyes and inorganic salt ions, as well as enhanced anti-fouling property, compared with pure ZIF-8 materials. The utilization of biomacromolecules to stabilize ZIF membranes enables potential applications for ZIF membranes in wider water-related fields.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Hailan Wang, Lingna Wang, Enchao Li, Ruobin Dai, Zhiwei Wang
Summary: Customizing cleaning procedures based on membrane fouling characteristics is crucial for improving the cleaning efficiency of multi-step nanofiltration and reverse osmosis membrane processes in zero liquid discharge systems. Alkaline + acid cleaning procedures were effective for organic and inorganic fouling removal in the two-stage NF process, but failed to completely remove Si-Al complex scaling in the second stage RO process.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
