电絮凝─超滤协同去除水中的腐殖酸  

Removal ofhumic acid from water by hybrid electrocoagulation and ultrafiltration technology

作　　者：赵凯[1,2] 杨春风[1] 孙境求[2,3] 李静 胡承志[2] 

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中国科学院饮用水科学与技术重点实验室中国科学院生态环境研究中心,北京100085 [3]中国科学院大学,北京100049

出　　处：《环境工程学报》2017年第7期3965-3970,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51378490);国家水体污染控制与治理科技重大专项(2015ZX07402003-3)

摘　　要：采用电絮凝-超滤(electrocoagulation-ultrafiltration,EC-UF)技术协同去除水中腐殖酸(HA),主要考察了电流密度、初始pH、初始HA浓度、初始电导率等因素对HA去除率的影响,解析了在这些影响因素下HA的去除机理,并对滤饼层特征和膜污染机制进行了研究。结果表明,在电流密度j=10 A·m^(-2)、初始pH=7、初始电导率σ0=1 000μS·cm^(-1)、电解时间为15 min的条件下,初始HA浓度为10 mg·L^(-1)时,EC-UF工艺对水中的HA的去除率可以达到97.3%,膜污染为可逆污染,被污染的膜经过清洗后通量可恢复到初始的94%。This study investigated the removal of humic acid （HA） from water through hybrid electrocoagula- tion-ultrafiltration technology. The effects of main operating parameters,including current density,initial pH,ini- tial HA concentration, initial solution conductivity, and other factors on the removal of HA were studied. Perform- ances of these factors on the HA removal mechanism, cake layer characteristics, and mechanism of membrane fouling were analyzed. Furthermore, on the conditions that current density, initial pH, initial conductivity, elec- trolysis time, and HA concentration were 10 A · m -2,7,1 000 μS · cm^ - 1,15 min, and 10 mg· L^- 1, respective- ly,HA removal rate could reach 97.3%. Membrane fouling was reversible and cleaned-membrane flux could be recovered to 94% of the initial flux.

关 键 词：电絮凝 超滤 腐殖酸 水处理 

分 类 号：X703[环境科学与工程—环境工程]