S(Ⅳ)介导Cr(Ⅵ)与阿特拉津的自促进降解综合实验设计  

A Comprehensive Experimental Design for the Self-Promoted Degradation of Cr(VI)and Atrazine Mediated by S(IV)

作　　者：袁颐进 姚成立[1] YUAN Yijin;YAO Chengli(School of Pharmaceutical and Chemical Engineering,Hefei Normal University,Hefei 230601,China)

机构地区：[1]合肥师范学院化学与制药工程学院,合肥230601

出　　处：《重庆科技学院学报（自然科学版）》2023年第4期86-91,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：安徽省研究生教育教学改革研究项目“‘数字化实验’融研究生培养和中学化学教改为一体的探索与研究”(2022JYJXGGYJ348);安徽省高等学校省级质量工程教学研究重点项目“融‘大创’训练于物理化学实验教学改革的研究”(2022JYXM1308);合肥师范学院思政示范课程“物理化学实验”(2022SZSFKC03)。

摘　　要：基于学生实验能力的培养目标,设计利用亚硫酸钠处理含Cr(Ⅵ)和常用农药阿特拉津(ATZ)的模拟复合废水实验。此实验考察了亚硫酸钠浓度、Cr(Ⅵ)浓度、溶液初始pH对ATZ降解效果的影响,通过自由基捕获实验探究其反应机理。实验结果表明:Cr(Ⅵ)的还原和ATZ的降解具有自促进效应;当亚硫酸钠浓度为1 mmol/L,Cr(Ⅵ)质量浓度为15 mg/L,溶液初始pH为3.5,反应时间为30 min时,阿特拉津的降解率达92%;Cr(Ⅴ)对阿特拉津的去除起主导作用,SO_(4)·-起次要作用。Based on the goal of cultivating students'experimental ability,the experiment of treating simulated compound wastewater containing Cr(Ⅵ)and common pesticide atrazine(ATZ)with Sodium sulfite was designed.In this experiment,the effects of sodium sulfite concentration,Cr(Ⅵ)concentration and initial pH of solution on the degradation of atrazine were investigated,and the reaction mechanism was explored by free radical trapping experiment.The results show that the reduction of Cr(Ⅵ)and degradation of atrazine have self-promoting effects.When the concentration of sodium sulfite was 1 mmol/L,the mass concentration of Cr(Ⅵ)was 15 mg/L,the initial pH of the solution was 3.5,and the reaction time was 30 min,the degradation efficiency of atrazine reached 92%.Cr(Ⅴ)plays a leading role in the removal of atrazine,while SO_(4)·-plays a minor role.

关 键 词：六价铬 亚硫酸盐 阿特拉津 自促进降解效应 综合化学实验 

分 类 号：O665[理学—分析化学]