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  

Study on the Preparation of Positively Charged Nanofiltration Membrane and Its Application in Heavy Metal Wastewater Treatment

作　　者：蒲彦利[1,2] 薛渊[1] 曹文婷[1] 潘春燕[1] 张轩[2] 徐虹[1] 

机构地区：[1]镇江市疾病预防控制中心检验科,江苏镇江212004 [2]南京理工大学,江苏南京210094

出　　处：《水处理技术》2017年第11期19-22,26,共5页Technology of Water Treatment

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-甲基吡啶鎓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%。Polyamide composite nanofiltration membrane was prepared by piperazine and three benzoyl chloride through interfacial polymerization on the surface ofpolyether sulfone basement membrane, and it was modified by adding 2-chloro-1-methylpyridinium iodide to prepare positively charged polyamide nanofiltration membrane （G-TFC）. The structure and property of three membranes and the G-TFC membrane removal efficiency for three heavy metal ion were studied. The results showed that, the hydrophilia of G-TFC was enhanced, the contact angle decreased from 75.0°±2.0° to 46.9°±3.5° and the isoelectric point increased to 9.9 mV. The flux of G-TFC membrane for Cu^2＋, Ni^2＋ and Pb^2＋ single solution with 50~500 mg/L mass concentration was 25~30 L/（m^2·h）, and the rejection rate was more than 90%, and satisfied the rule of Cu^2＋〉Ni^2＋〉PbC The flux for the Cu^2＋, Ni^2＋ and Pb^2＋ mixed solution was 30.6 L/（m^2· h）, and the rejection rate for Cu^2＋ and Pb^2＋ was more than 96%.

关 键 词：荷正电聚酰胺复合纳滤膜 表面接枝 荷正电 重金属去除 

分 类 号：TQ028.8[化学工程]