CoFe_(2)O_(4)改性活性炭活化PMS控制超滤膜有机污染  

Mitigation of organic fouling of ultrafiltration membrane by peroxymonosulfate activated by activated carbon loaded with CoFe_(2)O_(4)

作　　者：王青云 李凯 文刚 黄廷林 WANG Qing-yun;LI Kai;WEN Gang;HUANG Ting-lin(Shaanxi Key Laboratory of Environmental Engineering,Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province,School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西省环境工程重点实验室,陕西省水污染控制与水质安全保障协同创新中心,陕西西安710055

出　　处：《中国环境科学》2024年第11期6132-6138,共7页China Environmental Science

基　　金：陕西省自然科学基金资助项目(2023-JC-YB-448);陕西省重点科技创新团队项目(2023-CX-TD-32)。

摘　　要：采用溶胶-凝胶法制备了负载CoFe_(2)O_(4)的改性活性炭(CoFe_(2)O_(4)/PAC),考察了其活化过一硫酸盐(PMS)用于超滤膜前预处理控制有机污染的效能与机制.结果表明,CoFe_(2)O_(4)/PAC+PMS预处理使腐殖酸(HA)造成的膜通量下降大幅减缓,与PAC+PMS预处理后相比,比通量提高了55%,可逆和不可逆污染阻力分别下降了62%和51%;CoFe_(2)O_(4)/PAC+PMS预处理对污水厂二级出水中有机物(Ef OM)矿化效率高,对DOC的去除率达到76.4%,对主要荧光组分的去除率达到53.1%~67.7%,且优先去除分子量较高的有机物,因此使可逆和不可逆污染阻力分别减少了69%和67%;此外,Co Fe_(2)O_(4)/PAC具有较好的磁分离性能和可重复利用性.Activated carbon loaded with CoFe_(2)O_(4)(CoFe_(2)O_(4)/PAC)was synthesized using the sol-gel method,and its efficiency and mechanism for activating peroxymonosulfate(PMS)for mitigating organic fouling of ultrafiltration membrane was investigated.The results indicated that pretreatment of humic acid(HA)solution by CoFe_(2)O_(4)/PAC+PMS significantly alleviated membrane fouling.Compared with pretreatment by PAC+PMS,specific flux was increased by 55%after CoFe_(2)O_(4)/PAC+PMS pretreatment,and reversible and irreversible fouling resistance were decreased by 62%and 51%,respectively.The CoFe_(2)O_(4)/PAC+PMS pretreatment exhibited high removal efficiency for effluent organic matter(EfOM)of wastewater treatment plant,with the removal rate for DOC reaching 76.4%,and the removal rate for main fluorescence components reaching 53.1%~67.7%.Moreover,organic matter with higher molecular weight was preferentially removed.Therefore,CoFe_(2)O_(4)/PAC+PMS pretreatment of EfOM resulted in 69%and 67%reduction of the reversible and irreversible fouling resistance,respectively.Additionally,CoFe_(2)O_(4)/PAC exhibited good magnetic separation performance and reusability.

关 键 词：超滤 膜污染 过一硫酸盐(PMS) CoFe_(2)O_(4)改性活性炭 污水厂二级出水有机物(EfOM) 

分 类 号：X523[环境科学与工程—环境工程]