Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, China.
Chemosphere. 2010 Sep;81(3):408-14. doi: 10.1016/j.chemosphere.2010.06.071. Epub 2010 Jul 23.
The degradation effectiveness and degradation mechanism of representative organophosphorus (OP) pesticide during oxygen plasma treatment have been studied. The identification and quantitative determination of OP pesticide, the degradation mechanisms for OP pesticide destruction, its destruction intermediates, and by-products were performed using gas chromatography/mass spectrometry (GC/MS). Plausible mechanisms of the degradation are discussed. Experimental results indicate that oxygen plasma treatment has noticeable effects on OP pesticide with satisfactory degradation efficiency, which mainly depends on related operating parameters including plasma treatment time, discharge power, distance from the center of the induction coil, and concentrations of OP pesticide. It was found that OP pesticide was degraded into less-toxic compounds, and free radical reaction and addition reaction were to be the dominated the degradation mechanisms for OP pesticides treated by oxygen plasma. Therefore, our results suggest that oxygen plasma is suitable for degradation of OP pesticide.
研究了氧等离子体处理过程中代表性有机磷（OP）农药的降解效果和降解机制。使用气相色谱/质谱（GC/MS）对 OP 农药的鉴定和定量测定、OP 农药破坏的降解机制、其破坏中间体和副产物进行了分析。讨论了可能的降解机制。实验结果表明，氧等离子体处理对 OP 农药具有显著的效果，具有令人满意的降解效率，这主要取决于相关的操作参数，包括等离子体处理时间、放电功率、感应线圈中心距离和 OP 农药浓度。研究发现，OP 农药被降解成毒性较小的化合物，自由基反应和加成反应是氧等离子体处理 OP 农药的主要降解机制。因此，我们的结果表明，氧等离子体适用于 OP 农药的降解。
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