Study of the Decomposition in Carbofuran by Fenton and Ultrasonic Processes

摘要：

Carbofuran (C12H15NO3) is one of the most toxic carbamates pesticides, which is used to control insects in a wide variety of field crops including potatoes, corn and soybeans. In this study, Fenton process and ultrasonic process were applied to degrade carbofuran from aqueous system by batch experiments. Initial carbofuran concentration was designed at 10 to 50 mg/L and the additions of ferrous and hydrogen peroxide were between 0 to 10 mg/L and 0 to 200 mg/L, respectively. The initial pH value was 3 and the reaction temperature was 25oC. Experimental results indicate that the decomposition efficiencies of carbofuran by Fenton process are more than 90% but around 40% by ultrasonic process. In addition, mineralization of carbofuran observed by the decrease in total organic carbon (TOC) was less than 43% by Fenton process and less than 15% by ultrasonic process. As the addition of ferrous or hydrogen peroxide increased, a better decomposition efficiency of carbofuran by Fenton process and ultrasonic process was observed. Three kinds of intermediates proposed by other researches including 1,4-Benzenedicarboxaldehyde anion, 7-Benzofuranol, 2,3-dihydro-2,2-dimethyl and 7-hydroxy-2,2-dimethyl-benzofuran-3-one were determined after the carbofuran treatment by Fenton and ultrasonic process. Therefore, the possible reaction mechanisms of carbofuran decomposition could be developed.

关键词： Carbofuran Fenton process ultrasonic process intermediates degradation pathway

作者: MA Yingshih LIN Jihgaw KUMAR Mathava SUNG Chihfang YEH Chinhsiang CHANG Shihhan HU Chuanpin

作者单位: 1Department of Environmental Engineering and Health,Yuanpei University 306 Yuanpei Street,300,Hsinch Institute of Environmental Engineering,National Chiao Tung University,Hsinchu,Taiwan,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 937-942

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）