气液混合放电对水中阿特拉津的降解  

DEGRADATION OF ATRAZINE IN AQUEOUS SOLUTION BY GAS-LIQUID HYBRID DISCHARGE

作　　者：冯景伟[1] 郑正[1] 罗兴章[1] 聂耳[1] 赵国华[1] 高顺枝[1] 黄星发[1] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210093

出　　处：《环境化学》2008年第6期707-711,共5页Environmental Chemistry

基　　金：国家自然科学基金资助项目(编号:10475040);上海同济高廷耀环保科技发展基金;南京大学博士学位文论文培育基金资助

摘　　要：采用气液混合放电降解水溶液中的阿特拉津,考察了放电输出功率、溶液pH值和Fe2+浓度对阿特拉津降解的影响,并初步探讨了其降解动力学.结果表明,提高放电输出功率、降低溶液pH值均能提高阿特拉津的降解率.相同实验条件下,添加Fe2+显著提高了阿特拉津的降解率,在Fe2+添加量分别为0.2,0.6,2.0mmol·l-1时,随着Fe2+浓度的升高阿特拉津的降解率也不断提高.阿特拉津在气液混合放电反应器中的降解符合一级反应动力学.阿特拉津降解过程中的中间产物主要通过以下4种途径产生∶脱烷基作用、烷基氧化作用、脱氯羟化作用和脱氯羟化-氧化作用.Degradation of Atrazine in aqueous solution was conducted in a gas-liquid hybrid discharge reactor. The effect of output power, pH value and Fe^2＋ concentration on the degradation efficiency of Atrazine was examined. The initial investigation on the degradation kinetics of atrazine was conducted. The results revealed that the degradation efficiency of Atrazine increased with increasing output power and decreasing pH value, respectively. Under the same experimental conditions, the degradation efficiency of Atrazine increased dramatically in increasing Fe^2＋ the presence concentration of Fe^2＋ Furthermore, the degradation efficiency of atrazine increased with at the concentration of 0. 2, 0. 6, by gas-liquid hybrid discharge fitted first-order reaction kinetics. The degradation intermediates of Atrazine were produced by dealkylation, alkylic-oxidation, dechlorination and dechlorination-oxidation processes.

关 键 词：阿特拉津 气液混合放电 降解 

分 类 号：X132[环境科学与工程—环境科学]