催化作用
化学
双酚A
浸出(土壤学)
金属有机骨架
电子顺磁共振
煅烧
环境化学
X射线光电子能谱
矿化(土壤科学)
锰
化学工程
降级(电信)
污染物
无机化学
核化学
吸附
有机化学
土壤水分
环氧树脂
土壤科学
工程类
物理
电信
核磁共振
氮气
计算机科学
环境科学
作者
Prosper Kwame Klu,Muhammad Abdul Nasir Khan,Chaohai Wang,Junwen Qi,Xiuyun Sun,Jiansheng Li
标识
DOI:10.1016/j.envres.2021.112148
摘要
Development of efficient catalysts for peroxymonosulfate (PMS) activation and further understanding its mechanism on organic pollutants degradation is of significant importance for advanced oxidation processes (AOPs). Herein, hollow (Co, Mn)3O4 catalysts were synthesized by calcination of Co, Mn containing metal-organic frameworks (MOFs) and further used to evaluate the effectiveness of organic pollutants (Bisphenol A (BPA), atrazine (ATZ), and diethyl phthalate (DEP)) degradation by PMS activation. The PMS utilization efficiency in (Co, Mn)3O4/PMS system (36.4%) was estimated to be 28.0% and 43.8% higher than that of Co3O4/PMS and Mn5O8/PMS system, respectively. Notably, the metal leaching in (Co, Mn)3O4/PMS system was significantly suppressed. The utilization efficiency also reveals an inverse proportionality relationship with BPA mineralization but decreases with increasing initial pH value. A synergy between oxides of Co and Mn was perceived to enhance PMS utilization efficiency and BPA degradation. The results indicate enhanced catalytic performance with (Co, Mn)3O4 compared to Co3O4 derived from Co-MOF and other reported catalysts, with 99% of BPA degradation within 4 min. The oxidation mechanism was then proposed based on the electron paramagnetic resonance (EPR) and XPS results. Our findings might have contributed to designing heterogeneous catalysts for efficient PMS utilization in AOPs.
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