文献类型：期刊文献

英文题名：Ascorbic acid enhanced the circulation between Fe(II) and Fe(III) in peroxymonosulfate system for fluoranthene degradation

作者：Zhang, Longbin[1];Gao, Jianxiong[1];Liu, Yulong[1];Zhou, Zhengyuan[1];Sheng, Xianxian[1];Li, Dexiao[1];Chen, Yuantian[1];Lyu, Shuguang[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China

年份：2024

卷号：89

期号：7

起止页码：1682

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20241715978807);WOS:【SCI-EXPANDED(收录号:WOS:001190847000001)】；

基金：This study was financially supported by a grant from the National Natural Science Foundation of China (No. 41977164).

语种：英文

外文关键词：ascorbic acid; Fe(II); Fe(III); peroxymonosulfate; remediation

摘要：In this research, ascorbic acid (AA) was used to enhance Fe(II)/Fe(III)-activated permonosulfate (PMS) systems for the degradation of fluoranthene (FLT). AA enhanced the production of ROS in both PMS/Fe(II) and PMS/Fe(III) systems through chelation and reduction and thus improved the degradation performance of FLT. The results of the effect of chemical dosages on FLT removal showed that the optimal molar ratio in PMS/Fe(II)/AA/FLT and PMS/Fe(III)/AA/FLT processes were 2/2/4/1 and 5/10/5/1, respectively. In addition, the experimental results on the effect of FLT degradation under different groundwater matrixes indicated that PMS/Fe(III)/AA system was more adaptable to different water quality conditions than PMS/Fe(II)/AA system. SO4 center dot- was the major reactive oxygen species (ROS) responsible for FLT removal through the probe and scavenging tests in both systems. Furthermore, the degradation intermediates of FLT were analyzed using gas chromatograph-mass spectrometry (GC-MS), and the probable degradation pathways of FLT degradation were proposed. In addition, the removal of FLT was also tested in actual groundwater and the results showed that by increasing the dose and pre-adjusting the solution pH, 88.8 and 100% of the FLT were removed for PMS/Fe(II)/AA and PMS/Fe(III)/AA systems.