文献类型：期刊文献

英文题名：Dual-Path Oxidation of Phenolic Organic Contaminants Triggered by the β-MnO2/Bisulfite System

作者：Zhou, Yi[1,2,3];Li, Xia[1];Chen, Xinyu[1];Lu, Jian[1];Zhou, Yanbo[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Multimedia Environm Catalysi, Shanghai 200237, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2022

卷号：2

期号：12

起止页码：2579

外文期刊名：ACS ES&T WATER

收录：WOS:【ESCI(收录号:WOS:000888021100001)】；

基金：This work was supported by the National Natural Science Foundation of China (21906056) , the Program of ShanghaiOutstanding Technology Leaders (Grant No. 20XD1433900) , and the Science and Technology Commission of Shanghai Municipality (Nos. 22ZR1418600, 20DZ2250400) .

语种：英文

外文关键词：advanced oxidation processes; bisphenol A; bisulfite; manganese oxides; superoxide radical

摘要：Manganese dioxide (MnO2) is often used to treat pollutants in water owing to its high oxidative activity. Bisulfite (BS) as an activator can promote the degradation efficiency of MnO2. However, the mechanism of different crystalline MnO2 in the presence of BS is still controversial. The oxidation performance of the tunnel type (alpha-MnO2, beta-MnO2) and the two-dimensional lamellar type (delta-MnO2) in the presence of BS was investigated. beta- MnO2/BS exhibited the highest oxidative activity under optimal conditions. The bisphenol A (BPA) oxidation kinetic constant of beta-MnO2/BS (0.737 min-1) was 6 and 2.3 times higher than that of delta-MnO2/BS and alpha-MnO2/BS, respectively. The mineralization efficiency of BPA reached 80.05% within 15 min, owing to the high content of Mn(IV) in beta-MnO2. BS could rapidly reduce beta-MnO2 to produce a high concentration of Mn(III). Soluble Mn(III) directly participates in the BPA oxidation, and the surface Mn(III) can react with the surface adsorbed oxygen molecules (Oad) to generate superoxide radicals (O2 center dot-) to promote the deep mineralization of target contaminants. Moreover, the beta-MnO2/BS system can efficiently oxidate various phenolic organic pollutants even in natural water. This research can provide new insights for better understanding of the oxidation process of different crystalline-phase MnO2/BS.