荷正电纳滤膜的制备及其在重金属废水处理中的应用研究

发布时间：2018-01-17 21:04

本文关键词：荷正电纳滤膜的制备及其在重金属废水处理中的应用研究　出处：《水处理技术》2017年11期 　论文类型：期刊论文

【摘要】：以哌嗪(PIP)和均三苯甲酰氯(TMC)为两相单体,在聚醚砜(PES)基膜表面进行界面聚合反应得到TFC膜,进而通过添加2-氯-1-甲基吡啶摀碘化物活化接枝树状大分子改性制备了荷正电聚酰胺复合纳滤膜(G-TFC)。研究了3种膜的结构和性质,以及G-TFC膜对3种重金属离子的去除情况。结果表明,改性后的G-TFC膜亲水性增加,接触角由75.0°±2.0°降至46.9°±3.5°,且等电点提高至9.9 m V。G-TFC膜对质量浓度50~500 mg/L的单一Cu~(2+)、Ni~(2+)和Pb~(2+)离子溶液的通量在25~30 L/(m~2·h),截留率均90%,且满足Cu~(2+)Ni~(2+)Pb~(2+)的规律;对混合Cu~(2+)、Ni~(2+)和Pb~(2+)溶液的通量为30.6 L/(m~2·h),对Cu~(2+)和Pb~(2+)的截留率96%。
[Abstract]:The TFC film was prepared by interfacial polymerization on the surface of polyethersulfone (PES) base film using piperazine (piperazine) and tribenzoyl chloride (TMC) as two-phase monomers. Furthermore, the composite nanofiltration membrane of charged polyamide was prepared by adding 2-chloro-1-methylpyridine to activate graft dendrimer. The structure and properties of three kinds of membranes were studied. The results showed that the hydrophilicity of modified G-TFC membrane increased and the contact angle decreased from 75.0 掳卤2.0 掳to 46.9 掳卤3.5 掳. The isoelectric point was increased to 9.9m V.G-TFC membrane for a single Cu~(2 with a mass concentration of 50 ~ 500 mg/L). The fluxes of Ni~(2) and Pb~(2) ionic solutions were 2530 L / L / h ~ 2 路h ~ (-1), and the rejection rates were both 90%. And satisfied with the rule of Cu~(2. The fluxes of mixed Cu~(2 and Pb~(2) solutions are 30.6 L / m ~ (2 路h) 路h). The retention rate of Cu~(2 and Pb~(2) was 96%.
【作者单位】：镇江市疾病预防控制中心检验科;南京理工大学;
【分类号】：TQ051.893;X703
【正文快照】： 近年来,随着我国经济的快速发展,化学产品日益增多,经过各种途径进入水环境的有害物质越来越多[1]。在工业废水的排放过程中,重金属离子过量排放到环境水体中容易破坏生态平衡,并通过饮用水及食物链到达人体,在人体内长期累积、富集,影响人类健康,比如水俣病及骨疼病就是含汞

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