Degradation of tartrazine by peroxymonosulfate through magnetic Fe_(2)O_(3)/Mn_(2)O_(3) composites activation  

作　　者：Gong Chen Li-Chao Nengzi Yingjie Gao Guixian Zhu Jianfeng Gou Xiuwen Cheng 

机构地区：[1]Key Laboratory of Western China's Environmental Systems(Ministry of Education)and Key Laboratory for Environmental Pollution Prediction and Control,Gansu Province,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China [2]Academy of Economics and Environmental Sciences,Xichang University,Xichang 615000,China

出　　处：《Chinese Chemical Letters》2020年第10期2730-2736,共7页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(No.51978319);National College Student Innovation and Entrepreneurship Training Program of Lanzhou University;Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lake,Chinese Academy of Sciences。

摘　　要：In this study,Fe_(2)O_(3)/Mn_(2)O_(3) composite was synthesized by a facile two-step technique,and several methods were carried out to characterize it.Then,the decomposition experiments of tartrazine(TTZ),a kind of refractory o rganic pollutant,were conducted under various enviro nmental condition to detect the catalyst performance,such as reaction system,the dosage of catalyst,peroxymonosulfate(PMS)concentration,initial pH,different natural water substances.The results exhibited that Fe_(2)O_(3)/Mn_(2)O_(3) composite with the mole rate 2:3 had the best PMS activation performance and the removal efficiency was 97.3%within 30 min.Besides,the optimum degradation conditions of TTZ we re also discussed,that is catalyst dosage(0.6 g/L),PMS concentration(0.8 g/L)and the initial pH 11.In addition,proved by the natural water substances adding experiments,HPO_(4)^(2)-,HCO_(3)^-,NO_(3)^-and NOM(nature organic matter)could slow down the experiments progressing,but Cl^-could boost it.Then inhibitor experiments indicated both the HO^·and SO_(4)^·-played a vital role in the experiments.Reusability and ions leaching experiments as well as the used catalyst physical characte rization images exhibited the excellent stability and cyclicity of the Fe_(2)O_(3)/Mn_(2)O_(3) composite.Finally,based on the XPS(X-ray photoelectro n spectro scopy)and the experiments results,the possible mechanism of TTZ degradation was proposed.This system might provide a novel thought for the decomposition of refractory organic pollutant and had potential in promotion of actual sewage treatment technology.

关 键 词：Fe_(2)O_(3)/Mn2O3 PEROXYMONOSULFATE TARTRAZINE DEGRADATION ACTIVATION Mechanism 

分 类 号：TQ426[化学工程] TB332[一般工业技术—材料科学与工程] X703[环境科学与工程—环境工程]