INVESTIGATION OF CARBOFURAN DECOMPOSITION BY A COMBINATION OF ULTRASOUND AND FENTON PROCESS
INVESTIGATION OF CARBOFURAN DECOMPOSITION BY A COMBINATION OF ULTRASOUND AND FENTON PROCESS
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超声与 Fenton 工艺相结合研究呋喃丹分解
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Chi
中科院分区：
文献类型：
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作者：
Ying;Chi
呋喃是一种毒性最强的氨基甲酸酯类杀虫剂，用于控制包括土豆、玉米和大豆在内的各种大田作物的昆虫。超声波工艺是众所周知的在低pH下氧化污染的有机化合物。因此，本研究在批量实验中考察了超声波氧化呋喃的可行性。初始呋喃浓度为20 mg L -1，过氧化氢加入量为0300 mg L -1。H2SO4调节初始pH值为3℃，温度控制器将反应温度维持在25℃。超声波在120 min内氧化了40%以上的呋喃。而通过总有机碳的减少观察到的呋喃矿化小于15%。这说明部分呋喃被氧化为中间体。本研究还尝试将超声波工艺与Fenton试剂相结合，在30 min内将呋喃的降解效率提高到99%以上，矿化率达到40%。通过实验研究发现，超声波/Fenton工艺对呋喃的分解效果显著。
Carbofuran is one of the most toxic carbamate pesticides used to control the insects in a wide variety of field crops including potatoes, corn and soybeans. Ultrasonic process is well known at low pH for the oxidation of contaminated organic compounds. Therefore, the feasibility of carbofuran oxidation by ultrasonic process was investigated in this study in batch experiments. Initial carbofuran concentration was at 20 mg L -1 and the additions of hydrogen peroxide were between 0300 mg L -1 . The initial pH value was adjusted by H2SO4 at 3 and the reaction temperature was maintained at 25 °C by a temperature controller. More than 40% of carbofuran was oxidized by ultrasonic process in 120 min. However, the mineralization of carbofuran observed by the decrease in total organic carbon was less than 15%. This reveals that part of carbofuran was oxidized to intermediates. This study also tried to combine the ultrasonic process with Fenton reagents and the degradation efficiency of carbofuran was increased to more than 99% with 40% mineralization within 30 min. Based on this experimental investigation, it is found that the carbofuran can be significantly decomposed by an ultrasound/Fenton process.