净水技术2018，Vol.37Issue(2)：17-23,37,8.DOI:10.15890/j.cnki.jsjs.2018.02.004
单过硫酸氢钾复合粉降解水中甲氧苄啶的效能与机理
Efficiency and Mechanism of Trimethoprim Degradation by Oxone in Aqueous Solution
摘要
Abstract
This experiment investigated the kinetics and mechanisms of TMP degradation by oxone,a new type of drinking water disinfectant.The active subustance generated in the reaction was identified using the indirect method.Some important operating parameters,such as dosages of oxone,initial pH of solution,temperature,were systematically investigated.The results showed that oxone generated active chlorine species by non-radical reaction at room temperature.TMP degradation fit well with the pseudo-firstorder kinetics.The pseudo-first-order-constant was 9.15× 10-2 min-1(R2＞0.99),increased with the increasing of the initial oxone concentration.Different initial pH environment had certain effect on the degradation of TMP.When the initial pH value was changed from acidic to alkaline,the degradation rate of TMP had a tendency to drop and then elevate,which could reach 62.4％.Elevating solution temperature would efficiently accelerate degradation of TMP,when temperature was 15～55 ℃.The reaction activation energy was 34.12 kJ/mol.The results of disinfection byproduct analysis showed that the DBPs produced during the degradation of TMP by oxone (mainly CHC13).Results from this study showed oxidation of TMP by oxone might be an efficient approach to remove TMP from waters.关键词
单过硫酸氢钾复合粉/甲氧苄啶/活性氯/反应动力学/消毒副产物Key words
oxone/trimethoprim (TMP)/active chlorine/reaction kinetics/disinfection by-products (DBPs)分类
资源环境引用本文复制引用
古振川,高乃云,陈菊香,安娜..单过硫酸氢钾复合粉降解水中甲氧苄啶的效能与机理[J].净水技术,2018,37(2):17-23,37,8.基金项目
国家科技重大专项(2012ZX07403-001) （2012ZX07403-001）
国家科技重大专项(2014ZX07406-002) （2014ZX07406-002）
国家自然基金(51608372) （51608372）
