%0 Journal Article
%T Influential Factors and Degradation Pathway of Imidacloprid by Homogeneous Co/PMS System<br>均相Co/PMS系统降解吡虫啉的影响因素及降解途径研究
%A CHEN Xiao-yang
%A CHEN Xiao-yang
%A CHEN Jing-wen
%A YANG Ping
%A QIAO Xian-liang
%A <br>陈晓旸
%A 陈晓
%A 陈景文
%A 杨萍
%A 乔显亮
%J 环境科学
%D 2007
%I 
%X Cobaltous-mediated decomposition of peroxymonosulfate (Co/PMS) system is one of novel advanced oxidation technologies (AOTs), which leads to the formation of very strong oxidizing species in aqueous. Effects of PMS concentrations, Co2+ concentrations and various inorganic anions (H2PO4?, HCO3?, NO3?, Cl?) on the degradation of Imidacloprid induced by Co/PMS system was investigated as emphasis. The degradation kinetics of Imidacloprid followed pseudo first-order kinetics and reaction rates related to PMS and Co2+ concentrations. The reaction rates increased with increasing PMS] and Co2+] when the other parameters were constant. However, the decrease of degradation rates was found when the molar ratio of PMS versus Imidacloprid was over 20. The effects of H2PO4? had positive effect on the degradation of Imidacloprid, low concentration HCO3? had positive effect and high concentration HCO3? has negative effect, Cl? had negative effect, while NO3? had little effect. Based on the results of GC/MS, two main intermediates were identified, 6-chloronicotinic acid and 6-chloronicotinamide, and the reaction pathway for SO4?? induced by homogeneous Co/PMS was proposed accordingly.
%K advanced oxidation technologies (AOTs)
%K sulfate radical
%K inorganic ion
%K degradation mechanism
%K wastewater treatment
%K Imidacloprid<br>高级氧化技术(AOTs)
%K 硫酸自由基
%K 无机离子
%K 降解机理
%K 废水处理
%K 吡虫啉
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=68600CC102E1CF34AAD31F8BE613F466&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=59906B3B2830C2C5&sid=192794C56A88C67F&eid=5DBE03845979A02E&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=19