Enhanced oxidation of bisphenol A by permanganate in the presence of epigallocatechin gallate: Kinetics and mechanism
Enhanced oxidation of bisphenol A by permanganate in the presence of epigallocatechin gallate: Kinetics and mechanism
复制标题
表没食子儿茶素没食子酸酯存在下高锰酸盐增强双酚 A 的氧化：动力学和机制
DOI：
10.1016/j.seppur.2020.117025
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发表时间：
2020-09
影响因子：
8.6
通讯作者：
Bu Lingjun
中科院分区：
文献类型：
--
作者：
Shi Zhou;Li Zhexiong;Gao Jiong;Wu Yangtao;Zhou Shiqing;Bu Lingjun
在还原剂或配体存在下，高锰酸盐（PM）加速氧化新出现的污染物在以前的研究中有报道。表没食子儿茶素没食子酸酯（Epigallocatechin gallate，EGCG）是一种新型的水处理药剂，具有还原和螯合双重功能.因此，本研究将表没食子儿茶素没食子酸酯（EGCG）应用于促进PM氧化双酚A（BPA），并表现出比亚硫酸盐、羟胺、EDTA和柠檬酸盐更好的性能。研究了PM/EGCG摩尔比、pH、溶解氧、碱性和天然有机物对PM/EGCG工艺性能的影响。结果表明，PM/EGCG的最佳摩尔比为1：0.1，在pH 5-8范围内，EGCG对PM的氧化有显著的促进作用。溶解氧和碱度对PM/EGCG工艺中BPA的降解表现出抑制作用，而天然有机物对PM/EGCG工艺的性能影响不明显。利用猝灭实验（用焦磷酸盐）和紫外-可见全扫描光谱证实了活性Mn中间体的形成，表明活性Mn中间体是PM/EGCG过程中负责BPA降解的主要活性物种。总的来说，我们的研究提供了一个新的和环境友好的替代方案，以提高PM氧化。
Accelerated oxidation of emerging contaminants by permanganate (PM) in the presence of reducing reagents or ligands was reported in previous studies. Epigallocatechin gallate (EGCG) is a novel reagent used in water treatment, with simultaneous reducing and chelating ability. Therefore, EGCG was applied to enhance PM oxidation of bisphenol A (BPA) in this study, and showed a better performance than sulfite, hydroxylamine, EDTA, and citrate. The impacts of molar ratio of PM/EGCG, pH, dissolved oxygen, alkalinity, and natural organic matters on the performance of PM/EGCG process were investigated. The results demonstrated that optimum molar ratio of PM/EGCG was at 1:0.1, and EGCG significantly enhanced PM oxidation at pH 5-8. Dissolved oxygen and alkalinity showed inhibitory impacts on BPA degradation in PM/EGCG process, while natural organic matters have no obvious impact on the performance of PM/EGCG process. Formation of reactive Mn intermediates was confirmed using quenching experiments (with pyrophosphate) and UV-vis full scan spectra, indicating that reactive Mn intermediates were the predominant reactive species responsible for BPA degradation in PM/EGCG process. Overall, our study provides a novel and environmentally friendly alternative for enhancement of PM oxidation.
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影响因子：
5.8
作者：
Singh BN;Shankar S;Srivastava RK
通讯作者：
Srivastava RK
为什么溶解氧控制高锰酸盐/亚硫酸氢盐工艺中 Mn(III) 的形成和微污染物的消除？
影响因子：
15.1
作者：
Dong Huiyu;Duan Shule;Liu Chao;Yuan Xiangjuan;Qiang Zhimin
通讯作者：
Qiang Zhimin
影响因子：
15.1
作者：
Xuhui Sun;Mingbao Feng;Shuyu Dong;Y. Qi;Lin Sun;N. Nesnas;V. Sharma
通讯作者：
Xuhui Sun;Mingbao Feng;Shuyu Dong;Y. Qi;Lin Sun;N. Nesnas;V. Sharma
影响因子：
12.8
作者：
Kasprzyk-Hordern, Barbara;Dinsdale, Richard M.;Guwy, Alan J.
通讯作者：
Guwy, Alan J.
影响因子：
11.4
作者：
Sun, Bo;Guan, Xiaohong;Tratnyek, Paul G.
通讯作者：
Tratnyek, Paul G.