Mitigation of organic fouling of ultrafiltration membrane by peroxymonosulfate activated by activated carbon loaded with CoFe2O4
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
摘要 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.
Abstract：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.
王青云, 李凯, 文刚, 黄廷林. CoFe2O4改性活性炭活化PMS控制超滤膜有机污染[J]. 中国环境科学, 2024, 44(11): 6132-6138.
WANG Qing-yun, LI Kai, WEN Gang, HUANG Ting-lin. Mitigation of organic fouling of ultrafiltration membrane by peroxymonosulfate activated by activated carbon loaded with CoFe2O4. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(11): 6132-6138.
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