膜科学与技术

EDTA对纳滤镉的去除效能影响研究

作者：冷婧白玲※ 常娟

单位：江西农业大学理学院，南昌 330045

关键词：络合纳滤； EDTA；镉去除率；pH；膜通量

出版年,卷(期):页码： 2016,36(4):134-138

摘要：

以EDTA为络合剂，选取含有重金属镉的土壤酸性沥出液为研究对象，探索络合纳滤工艺对镉离子的去除率和膜通量的强化效果，并研究了pH、EDTA浓度和压力对络合纳滤过程的影响，同时采用正交实验设计对络合纳滤工艺的操作条件进行了优化。结果表明，EDTA可以明显地增强纳滤膜对镉离子的截留率和膜通量，并获得了络合纳滤工艺去除镉的最佳操作条件。

Ethylene diamine tetraacetic acid(EDTA) was chosen as the complexing agent to study the enhanced effects of nanofiltration for the removal of cadmium from soil acidic leachate. The effects of pH ，concentration of EDTA and applied pressure on cadmium ion rejection were examined in complexation nanofiltration, and simultaneously its process conditions were optimized by orthogonal experimental design. The results showed that the cadmium ions rejection and the permeate flux increased obviously with the present of EDTA in nanofiltration process. In addition, this paper obtained the best operating conditions of complexation nanofiltration.

第一作者简介：冷婧（1989-)，女，江西省修水县人，硕士，研究方向为废水处理和资源化；E-mail:13207091459@163.com。 ※为通讯作者， E-mail: lingbb716@163.com。

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