电絮凝-超滤除氟工艺参数优化研究  

Study of parameters optimization in defluoridation by electrocoagulation-ultrafiltration process

作　　者：王树青[1,2] 胡承志[2] 杨春风[1] 李静[1] 刘会娟[2] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085

出　　处：《环境工程学报》2015年第7期3093-3098,共6页Chinese Journal of Environmental Engineering

基　　金：环境水质学国家重点实验室专项经费资助项目(13Z02-ESPCT);国家"水体污染控制与治理"科技重大专项(2012ZX07414-001)

摘　　要：电絮凝-超滤（electrocoagulation-ultrafiltration,EC-UF）工艺在饮用水除氟方面具有良好的应用前景。研究了EC-UF除氟效果和膜污染过程,考察了电流密度、水力停留时间、初始pH、初始氟浓度对除氟效果和膜污染的影响。结果表明,在连续流下EC-UF工艺除氟效果良好,在电流密度30 A/m2、水力停留时间20 min、初始pH在6.0~7.0的最佳工艺条件下,氟的去除率达到80%以上。膜污染主要是由电解过程产生的铝絮凝剂与氟离子形成的颗粒物质导致。上述结果为EC-UF除氟工艺改进提供了参考和依据。The electrocoagulation-ultrafiltration process（EC-UF） has been recognized as a promising method for the fluoride removal from drinking water.The removal efficiency of fluoride by EC-UF and corresponding membrane fouling was investigated.Simultaneously,effects of current density,hydraulic retention time,initial pH values and initial fluoride concentration were investigated.The results indicated that in the continuous running,the fluoride can be largely removed by the EC-UF process.The removal rate of fluoride was up to 80% with optimizing the current density of 30 A/m2,hydraulic retention time of 20 min and initial pH of 6.0—7.0.It was observed that the membrane fouling was mainly caused by the particulates of the aluminum coagulants in electrolytic process and fluoride ions.The above results provide a reference and basis for EC-UF defluoridation process improvement.

关 键 词：电絮凝 超滤 饮用水 氟 膜污染 

分 类 号：X703[环境科学与工程—环境工程]