水溶液中乐果的光芬顿辅助反应
Photo-fenton assisted reaction of dimethoate in aqueous solutions.
作者信息
Nikolaki M D, Oreopoulou A G, Philippopoulos C J
机构信息
Chemical Process Engineering Laboratory, Department of Chemical Engineering, National Technical University, Athens, Greece.
出版信息
J Environ Sci Health B. 2005;40(2):233-46. doi: 10.1081/PFC-200045543.
The photo-Fenton reaction of an organophosphorus insecticide, dimethoate (O,O-dimethyl methylcarbamoylmethyl phosphorodithioate), was studied by following the identification and determination of the decomposition products and the total carbon removal rate. The reactions were performed in a batch recycle reactor, at room temperature, using UV radiation, H2O2 as oxidant, and FeCl3 x 6H2O as catalyst. The oxidation results were determined with a total organic carbon (TOC) analyzer and ion chromatography. The presence of reaction products was identified by gas chromatography-mass spectrometry (GC-MS). Apart from the sulfate, phosphate, and ammonium ions, the presence of dimethyl phosphite, N-methyl-acetamide, and formic acid was also detected. Excess of H2O2 concentration did not influence the reaction rate. The expression for the total carbon removal was assessed and the TOC removal rate constants were calculated.
通过追踪有机磷杀虫剂乐果（O,O-二甲基甲氨基甲酰基甲基二硫代磷酸酯）分解产物的鉴定与测定以及总碳去除率，研究了其光芬顿反应。反应在间歇循环反应器中于室温下进行，使用紫外线辐射、H₂O₂作为氧化剂以及FeCl₃·6H₂O作为催化剂。用总有机碳（TOC）分析仪和离子色谱法测定氧化结果。通过气相色谱-质谱联用仪（GC-MS）鉴定反应产物的存在。除了硫酸根、磷酸根和铵离子外，还检测到了亚磷酸二甲酯、N-甲基乙酰胺和甲酸的存在。H₂O₂浓度过高并不影响反应速率。评估了总碳去除的表达式并计算了TOC去除速率常数。
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