渗透
膜
聚偏氟乙烯
材料科学
化学工程
过电位
生物污染
超滤(肾)
刚果红
电渗析
过滤(数学)
色谱法
复合材料
化学
电极
有机化学
聚合物
吸附
渗透
电化学
生物化学
统计
工程类
物理化学
数学
作者
Weiming Yu,Ying Liu,Yanchao Xu,Renjie Li,Jianrong Chen,Baoqiang Liao,Liguo Shen,Hongjun Lin
标识
DOI:10.1016/j.memsci.2019.03.083
摘要
Ultrafiltration (UF) membrane has recently drawn interest in textile and dyeing wastewater treatment due to its unique advantages of low-cost and large flux. However, its low rejection to dyes and developing appropriate membrane materials remain the major hurdles for its large-scale application. Herein, we developed a novel conductive polyvinylidene fluoride (PVDF)-Ni membrane combined with an external electric field to treat typical dyes. The membrane could be fabricated by a facile and low-cost method. The conductive PVDF-Ni membrane showed favorable rejection rate of Congo red (CR) (100%) and extremely high permeance (137.5 ± 6.8 L m−2 h−1 bar−1). To our knowledge, the permeance has exceeded the maximal literature record for the membranes with similar rejection rates of CR. The novel membrane combined with external electric field also provided a unique aeration mode: in-situ aeration, due to its good electrocatalytic activity for hydrogen evolution reaction (HER) (overpotential of 157 mV at the current density of 10 mA cm−2). Benefit from the in-situ aeration, the PVDF-Ni membrane showed 94% flux recovery after filtration of bovine serum albumin (BSA). Additionally, the PVDF-Ni membrane exhibited evident resistance to dye absorption and antibacterial activity. These versatile proprieties, together with the facile fabrication process, indicated the tremendous application prospect of the fabricated PVDF-Ni membrane for textile and dyeing wastewater treatment.
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