Degradation of fenitrothion by ultrasound/ferrioxalate/UV system
Degradation of fenitrothion by ultrasound/ferrioxalate/UV system
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DOI：
10.1016/j.ultsonch.2009.06.011
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发表时间：
2010-01-01
影响因子：
8.4
通讯作者：
Ohta, Kiyohisa
中科院分区：
文献类型：
--
作者：
Katsumata, Hideyuki;Okada, Toshiko;Ohta, Kiyohisa
在铁离子和草酸盐存在下，研究了硫代磷酸酯类杀虫剂杀螟松的声化学光降解。Fe（III）和草酸盐的初始浓度对降解速率有很大影响。在最佳条件下，初始浓度为10 mg L（-1）的杀螟松在pH为6时，30 min后完全降解。因此，在草酸盐的存在下，光Fenton反应结合超声处理可在中性pH值左右。在超声波（US）/草酸铁/UV过程中观察到作为杀螟松矿化的结果TOC的减少。在该降解系统中观察到最终产物亚硝酸根和硫酸根离子的形成。杀螟硫磷的分解反应产生两种中间产物。根据中间产物的鉴定，提出了杀螟松的降解机理。因此，US/草酸铁/UV体系是一种处理杀螟硫磷废水的有效技术。(C)2009爱思唯尔有限公司版权所有。
The sonochemical photodegradation of fenitrothion, which is one of phosphorothiate insecticides, was carried out in the presence of Fe(III) and oxalate. The degradation rate was strongly influenced by initial concentrations of Fe(III) and oxalate. An initial fenitrothion concentration of 10 mg L(-1) was completely degraded after 30 min at pH 6 under the optimum conditions. Therefore, the photo-Fenton reaction combined with sonication in the presence of oxalate was available around neutral pH. The decrease of TOC as a result of mineralization of fenitrothion was observed during ultrasound (US)/ferrioxalate/UV process. In the formations of nitrite and sulfate ions as end-products were observed during this degradation system. The decomposition of fenitrothion gave two kinds of intermediate products. The degradation mechanism of fenitrothion was proposed on the base of the evidence of the identified intermediates. Based on these reulsts, US/ferrioxalate/UV system could be useful technology for the treatment of waste-water containing fenitrothion. (C) 2009 Elsevier B.V. All rights reserved.