壳聚糖络合-陶瓷膜耦合技术处理含铅废水  

REMOVAL OF LEAD FROM WASTEWATER BY CHITOSAN COMPLEXATION-CERAMIC MEMBRANE PROCESS

作　　者：江程斌 刘景洋[2] 张岩峰 马万里 张建强[1] 孙晓明[2] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610000 [2]中国环境科学研究院国家环境保护生态工业重点实验室,北京100012 [3]国电沈阳热电有限公司,辽宁沈阳110142

出　　处：《水处理技术》2015年第7期76-79,82,共5页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07202-001)

摘　　要：以壳聚糖为络合剂,采用孔径为200 nm的陶瓷膜处理去除溶液中Pb2+。结果表明,溶液p H、壳聚糖与Pb2+质量比(装载比M/P)是影响Pb2+截留率的决定因素。当p H为6.5、M/P为10、运行压力为0.2 MPa的优化条件下,Pb2+截留率达到100%,且具有很高的膜通量;溶液离子强度、Ca2+含量的增加均不利于Pb2+的截留;对运行浓缩的壳聚糖-铅溶液进行酸化解络并全倍数过滤回收壳聚糖溶液,回收的壳聚糖溶液对Pb2+能达到98%的截留率。Zirconia ceramic membrane with pore size being 200nm was chosen and chitosan was used as complexing agent to remove Pb2＋ from the wastewater. The value of pH, chitosan and Pb^2＋ mass ratio （M/P） were found to be the key parameters in the process of complexation; the rejection coefficient of lead reached 100% and the permeate had a high flux while pH was 6.5, M/P was 10 and operating pressure was 0.2 MPa; the increase of ionic strength and Ca^2＋ was not beneficial to the lead rejection; the chitosan-lead concentrated solution was acidified and then the chitosan was regenerated by diafiltration. And the regenerated chitosan solution was subsequently used to remove Pb^2＋ by complexation, and the rejection coefficient of lead could reach 98%.

关 键 词：含铅废水 壳聚糖 络合 陶瓷膜 

分 类 号：TQ028.8[化学工程] X703.1[环境科学与工程—环境工程]