Natural siderite derivatives activated peroxydisulfate toward oxidation of organic contaminant: A green soil remediation strategy  

作　　者：Chengwei Zhong Yinying Jiang Quanfeng Liu Xiaoshuang Sun Jiang Yu 

机构地区：[1]Department of Environmental Science and Engineering,College of Architecture and Environment,Sichuan University,Chengdu 610065,China [2]Yibin Institute of Industrial Technology,Sichuan University,Yibin 644000,China [3]Institute of New Energy and Low Carbon Technology,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Environmental Sciences》2023年第5期615-627,共13页环境科学学报（英文版）

基　　金：supported by the National Key Research and Development Program(No.2018YFC1802605);Sichuan Province Department of Science and Technology(No.2022YFQ0081);International Cooperation Project of Sichuan Province(No.2019YFH1027);Sichuan University-Yibin City school and City Strategic Cooperation Project(Nos.2019CDYB-26,2020CDYB-9).

摘　　要：Natural siderite(FeCO_(3)),simulated synthetic siderite and nZVI/FeCO_(3) composite were used as green and easily available iron-based catalysts in peroxydisulfate activation for remediating 2-chlorophenol as the target contaminant and this technique can effectively degrade organic pollutants in the soil.The key reaction parameters such as catalysts dosage,oxidant concentration and pH,were investigated to evaluate the catalytic performance of different materials in catalytic systems.The buffering property of natural soil conduced satisfactory degradation performance in a wide pH range(3-10).Both the main non-radical of ^(1)O_(2) and free radicals of SO_(4)^(-) and OH·were evidenced by quenching experiment and electron paramagnetic resonance.The reduction of nZVI on FFC surface not only has the advantage for electronic transfer to promote the circulation of Fe(Ⅲ)to Fe(Ⅱ),but also can directly dechlorinate.Furthermore,the intermediates were comprehensively analyzed by GC-MS and a potential removal mechanism of three oxidant system for 2-CP soil degradation was obtained.Briefly,this research provides a new perspective for organic contaminate soil treatment using natural siderite or simulated synthetic siderite as efficient and environmental catalytic material.

关 键 词：Natural siderite 2-CHLOROPHENOL Soil PEROXYDISULFATE Reactive radicals 

分 类 号：X53[环境科学与工程—环境工程]