改性纳滤膜处理镧离子稀土废水  

Treatment of Lanthanum Ion Rare Earth Wastewater by Modified Nanofiltration Membrane

作　　者：李柳 黄万抚[2] 李新冬[1] 黄李金鸿 包亚晴 袁佳彬 LI Liu;HUANG Wanfu;LI Xindong;HUANG Lijinhong;BAO Yaqing;YUAN Jiabin(School of Architectural and Surveying&Mapping Engineering,Jiangxi University of Science and Technology;School of Resource and Environmental Engineering,Jiangxi University of Science and Technology;School of Architecture and Design,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学土木与测绘工程学院 [2]江西理工大学资源与环境工程学院 [3]江西理工大学建筑与设计学院,江西赣州341000

出　　处：《水处理技术》2022年第4期85-88,103,共5页Technology of Water Treatment

基　　金：国家自然科学基金项目(41662004)。

摘　　要：研究以石墨烯量子点(GQDs)作为水相添加剂加入到哌嗪(PIP)水溶液中与均三苯甲酰氯(TMC)发生界面聚合反应制备复合纳滤膜,并用该膜处理镧离子稀土废水。通过正交实验确定制备改性膜的最佳比例质量分数为1.5% PIP、0.2% TMC、0.003% GQDs。在 30 ℃、0.6 MPa 条件下,改性纳滤膜对镧离子稀土废水的综合处理效果最好,长时间运行后改性纳滤膜的通量和截留率分别保持在 27.73 L/(m^(2)·h)和 97.31%。有望为今后纳滤膜处理稀土尾矿水提供方向。In this study, graphene quantum dots (GQDs) were added into the piperazine (PIP) aqueous solution, and the PIP solution was reacted with the isotribenzoyl chloride (TMC) solution to prepare the composite nanofiltration membranes, which were used to treat lanthanum ion rare earth wastewater. The optimum concentration of the modified membrane was determined by the orthogonal experiment of 1.5wt% PIP, 0.2wt% TMC, and0.003wt % GQDs., The modified nanofiltration membrane showed the best comprehensive treatment effect for the lanthanum ion rare earth wastewater under the conditions of 30 ℃ and 0.6 MPa, The flux and rejection rate of the modified nanofiltration membrane after long operation were kept at 27.73 L/(m^(2)·h) and 97.31%, respectively. It was expected to provide a direction for the treatment of rare earth tailings water by nanofiltration membrane.

关 键 词：石墨烯量子点 纳滤膜 稀土 镧离子 

分 类 号：TQ028.8[化学工程]