钴
化学
膜
降级(电信)
催化作用
污染物
单线态氧
氮化碳
过滤(数学)
石墨氮化碳
化学工程
水处理
无机化学
氧气
光催化
有机化学
环境工程
统计
工程类
数学
电信
生物化学
计算机科学
作者
Wei Zhang,Shaoze Zhang,Chenchen Meng,Zhenghua Zhang
标识
DOI:10.1016/j.apcatb.2022.122098
摘要
Sulfate radical-based advanced oxidation processes (SR-AOPs) constitute an efficient method for the effective removal of organic pollutants in water bodies. A novel cobalt-functionalized graphitic carbon nitride ([email protected]3N4) membrane was designed and prepared for the first time to activate peroxymonosulfate (PMS) for pollutant degradation. The prepared [email protected]3N4 membrane demonstrated a long-term stability over 100 h continuous operation at a flux of 113.2 L∙m−2∙h−1 and a retention time of 33 ms for 100 % removal of ranitidine (5 mg/L) as the target pollutant with the first-order rate constant 4–6 orders of magnitude higher than that in previously reported AOP systems. Singlet oxygen significantly contributed to the degradation of diverse pollutants within the numberless nanoconfined spaces of membrane. Oxygen vacancies in [email protected]3N4 can effectively promote the redox cycle of ≡Co(II)/ ≡Co(III) to maintain the catalytically active center. The developed membrane herein combining membrane filtration and AOP would provide a novel strategy for water and wastewater treatment.
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