高锰酸钾降解染料废水的规律探讨  

Degradation Rule of Various Kinds of Dye Wastewater by Potassium Permanganate Oxidation

作　　者：檀雅琴[1] 申哲民[1] 郭卫民[1] 唐庆丽[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《安全与环境工程》2014年第1期58-61,共4页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(21177083);新世纪优秀人才支持计划(NCET)项目;上海交通大学无锡研究院项目(2011JDZX019)

摘　　要：采用高锰酸钾氧化法研究了8种有机化合物在不同pH值条件下的降解规律.试验结果表明：8种有机物的TOC去除率在碱性条件下优于酸性和中性条件,在酸性和中性条件下TOC去除率介于10％～40％之间,而在碱性条件下TOC去除率最高可达69％;8种有机物的TOC降解在开始的几分钟呈现出良好的线性关系,相关性很好,符合一级动力学反应,且在酸性条件下氧化降解有机物的一级反应动力学常数平均值（K）TOC=0.021 375±0.012 603,中性条件下KTOC=0.012 750±0.008 924,碱性条件下（K）TOC=0.027 000±0.013 169,说明高锰酸钾氧化降解有机物的反应速率在碱性条件下较快,较之酸性条件下提高了26.3％,较之中性条件下提高了112％;决定高锰酸钾氧化降解有机物的反应速率的因素主要是物质的结构、反应溶液的pH值及高锰酸钾的投加量.This paper studies the degradation rules of eight organic compounds which are oxidized by potassium per- manganate under different pH conditions. The results show that TOC removal ratio under alkaline condition is su- perior to that of acidic and neutral conditions ~ the TOC removal ratio arranges from 10% to 40% under acidic and neutral conditions while it can reach 69 ~ under alkaline condition. The TOC degradation of all organic compounds shows a good linear relationship with time in the first few minutes and the degradation rule conforms to the first order kinetics equation. The average of the first order reaction kinetics constants of 8 organic compounds （KToc） under acidic condition is 0.021 375±0. 012 603,Kwcv under neutral condition is 0. 012 750±0.008 924,and KToc under alkaline condition is 0.027 000±0.013 169. The TOC degradation rate under alkaline condition is the fastest and it respectively increases by 26.3% and 112% when compared with that of acidic condition and neutral condi- tions. The reaction rate of potassium permanganate oxidation depends on the structure of organic compounds, the pH value of reaction solutions and the dosage of potassium permanganate.

关 键 词：高锰酸钾 有机物 一级动力学 TOC去除率 KTOC 

分 类 号：X703[环境科学与工程—环境工程]