文章基本信息

标题：UV Photo-Fenton Treatment of Combined Chlorpyrifos, Cypermethrin and Chlorothalonil Pesticides Aqueous Solution
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作者：Augustine Chioma Affam ; Malay Chaudhuri
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2013
卷号：12
期号：1
语种：English
出版社：Technoscience Publications
摘要：The study examined the effect of the operating conditions of the UV photo-Fenton process on COD andTOC removal, biodegradability improvement and mineralization of combined chlorpyrifos, cypermethrin andchlorothalonil pesticides in aqueous solution. The optimum operating conditions for treatment of an aqueoussolution containing 100 mg/L of chlorpyrifos, 50 mg/L of cypermethrin and 250 mg/L of chlorothalonil wereobserved to be H 2 O 2 /COD molar ratio 2, H 2 O 2 /Fe 2+ molar ratio 25 and pH 3. Under the optimum operatingconditions, complete degradation of the pesticides occurred in 1 min. Biodegradability (BOD 5 /COD ratio)increased from zero to 0.38 and COD and TOC removal were 78.56 and 63.76%, respectively in 60 min.The treatment resulted in release and mineralization of organic carbon and nitrogen from the pesticidemolecules as evident from TOC degradation (removal), and decrease in NH 3 -N from 22 to 3.9 mg/L andincrease in NO 3 -N from 0.7 to 19.3 mg/L in 60 min. The study shows that UV photo-Fenton process iseffective in pretreatment of combined chlorpyrifos, cypermethrin and chlorothalonil pesticides aqueous solutionfor biological treatment.