文献类型：期刊文献

英文题名：Peroxymonosulfate activation by β-cyclodextrin modified amorphous manganese oxides for a high-efficiency bisphenol A degradation

作者：Chen, Xinyu[1];Duan, Chengyu[1];Zhou, Yi[1,2];Yang, Linyan[1,2];Zhou, Yanbo[1,2]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2023

卷号：395

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20230713598330);WOS:【SCI-EXPANDED(收录号:WOS:000948082000001)】；

基金：This work was supported by Program of Shanghai Outstanding Technology Leaders (Grant No. 20XD1433900) , the National Natural Science Foundation of China (Grant No. 21906056, 51778230) , the Science and Technology Commission of Shanghai Municipality (22ZR1418600) .

语种：英文

外文关键词：Bisphenol A; Peroxymonosulfate; Manganese oxides; beta-cyclodextrin

摘要：Manganese oxide activated peroxymonosulfate (PMS) has gradually become one of the research focuses in the field of advanced oxidation. In this work, beta-cyclodextrin (beta-CD) modified amorphous manganese oxide (CD-AM) catalyst was obtained from a mild reaction condition (80 degrees C oil bath), high temperature crystallization is avoided in the synthesis process, which reduces the difficulty of catalyst preparation process and energy consumption. beta-CD is involved in the formation of manganese oxides. Amorphous manganese oxides have larger specific surface area and better PMS activation effect than crystalline manganese oxides, which is different from previous studies. The enrichment of cyclodextrin on BPA can improve the removal activity of amorphous manganese oxide/PMS system on BPA. The introduction of beta-CD increased the bisphenol A (BPA) degradation efficiency from 33.1% to 99.4%, and brought the kinetic constant to its 14.9 times. The 94% BPA degradation efficiency was obtained under neutral conditions that is more favorable for the actual process. During the degradation process, O-1(2) and .OH were the main ROS in CD-AM/PMS system, and O.-2 not only promoted the conversion of O.- 2 to O-1(2) but also accelerated the cycle of Mn (III)/Mn (IV). In addition, a simpler material recovery process for application was achieved by transforming CD-AM into the "supported membrane" (AMSM), and better performance and lower Mn ion leaching concentration were accessible. With the utilization of AMSM, Mn ion concentration in the filtrate after first filtration was about 1.2 mg/L, which was only 37% of the Mn ion concentration firstly detected in CD-AM. And after four cycles, the BPA degradation efficiency was 96.9%. When AMSM/PMS system was used to treat BPA in river water, the final degradation efficiency reached 94.8%. CD-AM as a catalyst for activating PMS shows great application potential in actual water.