文献类型：期刊文献

英文题名：Incorporating etched ZnO nanoparticles to fabricate positively charged composite membrane for heavy metal removal

作者：Yan, Hong-Fei[1];Luo, Li-Han[1];Xu, Zhen-Liang[1];Fang, Yin-Xin[1];Pandaya, Dibakar[1];Dai, Jia-Yue[1];Liang, Jing[1];Xu, Sun-Jie[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, Sch Chem Engn, Sch Mat Sci & Engn,State Key Lab Chem Engn,Membran, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：574

外文期刊名：DESALINATION

收录：;EI(收录号：20240215346997);WOS:【SCI-EXPANDED(收录号:WOS:001164810900001)】；

基金：The authors gratefully acknowledge for the financial support received from the State Key R & D Program of China (2021YFB3801103 and 2021YFB3801101) and National Natural Science Foundation of China (22078092, 21176067 and 22208101) as well as the research funding provided by the Fundamental Research Funds for the Central Universities (JKA01231522) .

语种：英文

外文关键词：Nanofiltration (NF) membrane; Divalent heavy metal ions; Thin-film nanocomposite membrane (TFN); Chemical etching; Zinc oxide (ZnO)

摘要：The removal of heavy metal ions by nanofiltration (NF) membranes is attractive, but it is limited by a trade-off effect between permeation and solute rejection. Generally, the permeability of the NF membrane is closely related to its hydrophilicity, while the solute rejection is closely related to size exclusion and the Donnan effect. In this study, porous etched zinc oxide (ZnO) nanoparticles were prepared through alkali etching, and a thin-film nanocomposite (TFN) NF membrane was fabricated by interfacial polymerization (IP) method between PEI and TMC on a polysulfone (PSF) substrate. The incorporation of 0.01 wt% etched ZnO nanoparticles increased the hydrophilicity and positive charge of the NF membrane, resulting in an increase in the permeability (from 6.0 L m- 2 h- 1 bar- 1 to 8.1 L m- 2 h-1 bar 1) and rejection of heavy metal ions (Cu2+, Zn2+, and Ni2+ increased from 85 % to over 96 %). Long-term filtration experiments using the simulated wastewater demonstrated that the prepared NF membrane exhibited good stability and had the potential for industrial applications. It opens a new pathway for studying TFN NF membranes, indicating that alkaline etching can transform smooth nanoparticles into nanoparticles with higher specific surface area and porosity, thereby improving the performance of membranes.