基于浓差电池技术的盐酸酸洗废液资源化处理研究  

Study on recycling and treatment of hydrochloric acid pickling waste liquid based on concentration difference cell

作　　者：沈博文 郑苏平 王忠东 胡勤海[1] 应文婷 SHEN Bowen;ZHENG Suping;WANG Zhongdong;HU Qinhai;YING Wenting(College of Environmental&Resource Sciences,Zhejiang University,Hangzhou Zhejiang 310058;Cangnan Branch of Wenzhou Ecology and Environment Bureau,Wenzhou Zhejiang 325800;Zhejiang Anammox Environmental Technology Co.,Ltd.,Hangzhou Zhejiang 310012)

机构地区：[1]浙江大学环境与资源学院,浙江杭州310058 [2]温州市生态环境局苍南分局,浙江温州325800 [3]浙江艾摩柯斯环境科技有限公司,浙江杭州310012

出　　处：《环境污染与防治》2020年第11期1330-1333,共4页Environmental Pollution & Control

基　　金：国家重点研发计划项目“固体废物填埋场地土壤污染风险管控与净化技术”(No.2018YFC1802300)。

摘　　要：盐酸酸洗废液现有处理方法仅关注酸和重金属去除,对盐差能利用和铁的回收鲜见报道。采用浓差电池技术处理盐酸酸洗废液,对铁和盐差能进行回收,并考察重金属去除效果,探讨了浓差电池高效处理和资源化利用盐酸酸洗废液的技术可行性,考察了离子交换膜种类、淡水室氯化钠浓度、淡水室曝气量对处理效果的影响。结果表明,当采用阳离子交换膜,浓差电池淡水室中氯化钠摩尔浓度为0.010 mol/L、曝气量为60 mL/s时,可以达到较好的盐差能和铁回收效果,重金属去除率较高,且经济成本较低。此时最大功率密度可达2.97 W/m^2,铁的回收率可以达到28.35%,重金属铜、镍、铅、镉去除率可分别达到92.76%、64.87%、42.12%、53.44%。The present treatment methods for hydrochloric acid pickling waste liquid only focus on the removal of acid and heavy metals.There are few researches focusing on the recycling of salinity gradient energy and iron.For the recycling of salinity gradient energy and iron,the concentration difference cell was used to treat hydrochloric acid pickling waste liquid,and the removal heavy metals was also studied.The effects of ion exchange membrane types,NaCl concentration in the fresh water chamber,and aeration amount in the fresh water chamber were discussed to measure recycling posibility.Result showed that when the NaCl molar concentration was 0.010 mol/L,and the aeration amount was 60 mL/s using cation exchange membrane,salinity gradient energy and iron could well recycled,and heavy metals could effectively removed with low costing.The maximal power density reached 2.97 W/m^2,iron recovery rate reached 28.35%,and the removal rates of Cu,Ni,Pb and Cd reached 92.76%,64.87%,42.12%and 53.44%,respectively.

关 键 词：盐酸酸洗废液 资源化 浓差电池 盐差能 

分 类 号：X703[环境科学与工程—环境工程]