摘要
设计了一套集重金属去除、氯化钠回收、大量固体废物再利用为一体的工艺并进行中试研究。调节pH至6~7和9~10可分别去除大部分Cu^2+、Sn^2+、Fe3+、Zn^2+、Pb^2+、Mg^2+等重金属离子,再串联反渗透和纳滤工艺,控制浓缩倍数5.3左右时截留率分别为97.7%和99.7%,终端串联的二级纳滤使NaCl浓度达到79092.5 mg/L。通过实验分析可知,该工艺可对溶液进行提纯、富集,使溶液中的氯化钠浓度、纯度均达到相应标准,从而实现氯化钠的回收利用。
A technology integrating with removing heavy metal,recovering sodium chloride and reusing large amount of solid waste is designed,and pilot study is carried out for it.Most of heavy metal ions such as Cu^2+,Sn^2+,Fe3+,Zn^2+,Pb^2+and Mg^2+can be removed by adjusting pH to 6-7 and 9-10,respectively,and then reverse osmosis and nanofiltration in series.The enterception rate reaches 97.7%after reverse osmosis and reaches 99.7%finally as the concentration multiple is controlled at around 5.3.NaCl concentration can reach 79092.5 mg·L-1 due to the secondstage nanofiltration in series terminal.Through the experimental analysis,it can be known that this process can purify and enrich the solution,and make the concentration and purity of sodium chloride in the solution reach the corresponding standards,so as to realize the recovery and utilization of sodium chloride.
作者
王慧雅
WANG Hui-ya(School of Environmental Engineering,Nanjing Institute of Technology,Nanjing 211167,China)
出处
《现代化工》
CAS
CSCD
北大核心
2020年第7期211-216,共6页
Modern Chemical Industry
基金
南京工程学院面上创新项目(CKJB201507)。
关键词
氯化钛渣
反渗透
纳滤
回收利用
chloride titanium slag
reverse osmosis
nanofiltration
recycle
