文献类型：期刊文献

英文题名：Mechanistic insights into fluoranthene degradation: Activation of peroxymonosulfate by mackinawite and pyrite in aqueous solution and soil slurry

作者：Liu, Yulong[1];Ali, Meesam[2];Zhang, Longbin[1];Sui, Qian[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;[2]Muhammad Nawaz Sharif Univ Engn & Technol, Dept Chem Engn, Multan 60000, Pakistan

年份：2025

卷号：374

外文期刊名：ENVIRONMENTAL POLLUTION

收录：;EI(收录号：20251518208306);WOS:【SCI-EXPANDED(收录号:WOS:001469408800001)】；

基金：This study was financially supported by a grant from the National Natural Science Foundation of China (No. 52470189) .

语种：英文

外文关键词：Peroxymonosulfate; Mackinawite; Pyrite; Activation mechanism; Groundwater remediation

摘要：The slow regeneration of Fe(II) in conventional Fenton and Fenton-like systems poses significant limitations for sustained and continuous generation of reactive oxygen species (ROS), which is critical for effective pollutant degradation. This study investigates the use of iron sulfide minerals-specifically, mackinawite (FeS) and pyrite (FeS2)-as both activators and reductants in peroxymonosulfate (PMS)-based Fenton-like systems to enhance Fe (II) regeneration and improve pollutant degradation efficiency. Results demonstrate that over 90 % of fluoranthene (FLT) was degraded within 60 min using the PMS/FeS and PMS/FeS2 systems. Reactive species including SO4-center dot, HO center dot, and 1O2 were generated in both systems, with SO4-center dot playing a primary role in FLT degradation, while 1O2 contributed partially to the process. Both FeS and FeS2 maintained structural stability during PMS activation, with surface Fe(II) oxidized to Fe(III) and reductive sulfur species (S2-in FeS and S22-in FeS2) facilitating the Fe(III)/Fe(II) cycle before ultimately converting to SO42-.These systems demonstrated robust performance across diverse water matrices, achieving excellent FLT degradation in actual groundwater and soil slurry, underscoring the promising application potential of PMS/FeS and PMS/FeS2 systems for remediating FLT-contaminated environments.