基于锰渣制备催化剂高效去除双酚A  

Advanced oxidation catalyst prepared from manganese slag and sewage sludge to remove bisphenol A efficiently

作　　者：雒梦琦 熊道陵[1] 贺治国[2] 罗序燕[1] LUO Mengqi;XIONG Daoling;HE Zhiguo;LUO Xuyan(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000 [2]中南大学资源加工与生物工程学院,长沙410083

出　　处：《有色金属科学与工程》2023年第2期210-218,共9页Nonferrous Metals Science and Engineering

基　　金：江西省自然科学基金资助项目(2020BAB203020)。

摘　　要：制备基于硫酸根自由基的高级氧化(SR-AOPs)催化剂通常是耗时长且昂贵的。将电解锰渣(MS)和污泥(SS)复合改性,构建了一种新型的过一硫酸盐(PMS)活化剂(命名为MBA800)。通过化学改性,去除MS和SS上的杂质成分,高温焙烧后,出现等级孔从而增加催化剂的比表面积。该催化剂能激活并催化过一硫酸盐(PMS)生成大量的自由基包括硫酸根自由基(SO_(4)^(-)·)、羟基自由基(·OH)和超氧自由基(·O_(2)^(-)),同时还有单线氧(1O2)的产生。该体系在60 min内,通过吸附和降解协同作用,对20 mg/L的双酚A(BPA)去除率高达100%。利用MBA800活化PMS并去除BPA,研究MBA800对BPA的吸附行为,探讨了MBA800初始浓度、pH、PMS浓度和环境条件对BPA降解的影响,为复合改性MS和SS开发高效、易制备的高级氧化催化剂提供新思路。Preparation of sulfate radical based advanced oxidation(SR-AOPs)catalysts is usually time-consuming and expensive.In this study,a new type of activator(MBA800)for persulfate(PMS)was constructed by composite modification of electrolytic manganese slag and sludge.Firstly,the impurities in manganese slag and sludge were removed by chemical modification.After roasting at high temperature,hierachical pores appeared and the specific surface area of the catalyst increased.The catalyst could activate and catalyze the PMS to generate a large number of free radicals including sulfate radical(SO_(4)^(-)·),hydroxyl radical(·OH)and superoxide radical(·O_(2)^(-)),as well as the single oxygen(1O2).Within 60 min,the removal rate of 20 mg/L bisphenol A(BPA)reached to 100%through the synergistic effect of adsorption and degradation.In this paper,MBA800 was used to activate PMS and remove BPA oxidation,and the adsorption behavior of BPA on MBA800 was also studied.Moreover,the effects of initial concentration of MBA800,pH,PMS concentration and environmental conditions on the degradation of BPA were discussed.This study provides a new idea for the development of novel advanced oxidation catalysts with the advantages of high efficiency and easy preparation for composite modification of MS and SS.

关 键 词：电解锰渣 污泥 双酚A 高级氧化 过硫酸盐 

分 类 号：TF111.146[冶金工程—冶金物理化学]