化工进展2016，Vol.35Issue(11)：3683-3689,7.DOI:10.16085/j.issn.1000-6613.2016.11.045
共存物质对UV/PS降解莠灭净的影响及降解路径
Effect of coexisting substances on degradation of Ametryn in UV/persulfate process and possible reaction pathways
摘要
Abstract
The degradation of Ametryn(AMT)was evaluated by UV activated persulfate(PS).The degradation process was based on generation of sulfate radical(•SO4–),hydroxyl radical(•OH).The effectiveness and the reaction kinetics model of the UV/PS process in the degradation of AMT was investigated. Effects of different concentrations of inorganic anions(Cl–,HCO3–,NO3–),natural organic matter(humic acid)in aqueous solution for the effectiveness and the kinetics of AMT degradation was studied,while emphasis was given on the degradation of AMT in ultrapure water,tap water,effluent water of different process in XiDong Water Plant as the solution backgrounds,and the possible degradation products and pathways of AMT were proposed.The results showed that the degradation of AMT in UV/PS would follow the first-order reaction kinetics model(R2≥0.94). When Cl– concentration was 5mmol/L,the decomposition of AMT would be inhibited,while the influence of other Cl–concentration were ignored.kobs decreased with the increase ofHCO3–,NO3–would speed upthe removal of AMT,when NO3– concentration was 200mmol/L,the increasing extent was weakened. kobs decreased with the increase of humic acid.The degradation rate of AMT in ultrapure water was highest among different water matrices.The major degradation products in this study are 2-methylthio-4,6-diamino-1,3,5 -triazine,2-hydroxy -4-ethylamino-6-isopropylamino-1,3,5-triazine.关键词
无机阴离子/过硫酸盐/莠灭净/动力学/降解产物Key words
inorganic anions/persulfate/Ametryn/kinetics/degradation products分类
资源环境引用本文复制引用
李卫平,王超慧,高乃云,杨文焕,于玲红,敬双怡..共存物质对UV/PS降解莠灭净的影响及降解路径[J].化工进展,2016,35(11):3683-3689,7.基金项目
国家科技重大项目（2012ZX07403-001）。 （）
