College of Food Science & Nutritional Engineering, Key Laboratory of Fruits and Vegetables Processing, Ministry of Agriculture, Engineering Research Centre for Fruits and Vegetables Processing, Ministry of Education, China Agricultural University, Beijing 100083, China.
Chemosphere. 2011 Feb;82(8):1109-15. doi: 10.1016/j.chemosphere.2010.11.081. Epub 2010 Dec 21.
In this paper, elimination of two types of organophosphorus pesticides (OPPs), chlorpyrifos and diazinon spiked in aqueous solution by ultrasonic irradiation was investigated. Results showed that chlorpyrifos and diazinon could be effectively and rapidly degraded by ultrasonic irradiation, and the degradation of both pesticides was strongly influenced by ultrasonic power, temperature and pH value. Furthermore, two and seven products for the degradation of chlorpyrifos and diazinon formed during ultrasonic irradiation have been identified by gas chromatography-mass spectrometry, respectively. The hydrolysis, oxidation, hydroxylation, dehydration and decarboxylation were deduced to contribute to the degradation reaction and the degradation pathway for each pesticide under ultrasonic irradiation was proposed. Finally, the toxicity evaluation indicated that the toxicity decreased for diazinon solution after ultrasonic irradiation, but it increased for chlorpyrifos solution. The detoxification of OPPs by ultrasonic irradiation was discriminative.
本文研究了超声波辐照对水溶液中两种有机磷农药（OPPs）——毒死蜱和二嗪农的去除效果。结果表明，超声波辐照能有效快速地降解毒死蜱和二嗪农，且超声功率、温度和 pH 值对两种农药的降解均有显著影响。此外，通过气相色谱-质谱联用仪分别鉴定出了超声波辐照过程中二嗪农和毒死蜱降解生成的两种和七种产物。推断水解、氧化、羟化、脱水和脱羧作用共同促进了降解反应，提出了超声辐照下两种农药的降解途径。最后，毒性评价表明，超声波辐照后二嗪农溶液的毒性降低，但毒死蜱溶液的毒性增加。超声波辐照对 OPPs 的解毒作用具有选择性。
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