中国环境科学

作者：王青云, 李凯, 文刚, 黄廷林

单位：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

关键词：超滤,膜污染,过一硫酸盐(PMS),CoFe2O4改性活性炭,污水厂二级出水有机物(EfOM)

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)

Activated carbon loaded with CoFe2O4 (CoFe2O4/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 CoFe2O4/PAC+PMS significantly alleviated membrane fouling. Compared with pretreatment by PAC+PMS, specific flux was increased by 55% after CoFe2O4/PAC+PMS pretreatment, and reversible and irreversible fouling resistance were decreased by 62% and 51%, respectively. The CoFe2O4/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, CoFe2O4/PAC+PMS pretreatment of EfOM resulted in 69% and 67% reduction of the reversible and irreversible fouling resistance, respectively. Additionally, CoFe2O4/PAC exhibited good magnetic separation performance and reusability.

来源：2024年第11期

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