Shayeghi M, Dehghani Mh, Fadaei Am
Dept. of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Iran J Public Health. 2011 Dec;40(4):122-8. Epub 2011 Dec 31.
Organophosphorus pesticides are one of the most prevalent usages for pest control in the country. Such pesticides enter into water sources by different routes. Since drinking of contaminated water at the higher doses than the standard level, may causes undesirable effects to human health and ecosystem. The object of this research was to investigate the effect of various parameters including time, power and concentration on sonodecomposition of malathion insecticide in the water.
The sonochemical degradation of malathion was investigated using acoustic wave technology (AWT). AWT with 130 kHz was used to study the decomposition of insecticide solution. Samples were analyzed using HPLC at different intervals times. Effectiveness of AWT at different times (20, 40, 60, 80, 100, and 120 minutes), concentrations of malathion at 2, 4 and 8 mg/L as well as powers of device (300W, 400W, 500W) are compared.
These findings showed that the degradation of the malathion insecticide at lower concentrations was greater in comparison to higher concentrations. Also, there was positive correlation between power increasing and the ability to malathion degradation
The sonodegradation of malathion at different concentrations and powers was successfully achieved. It has been shown that acoustical wave technology can be used to reduce the concentration of dissolved insecticide using high frequency.
有机磷农药是该国最普遍用于害虫防治的农药之一。此类农药通过不同途径进入水源。由于饮用受污染水的剂量高于标准水平，可能会对人类健康和生态系统造成不良影响。本研究的目的是调查包括时间、功率和浓度在内的各种参数对水中马拉硫磷杀虫剂声分解的影响。
采用声波技术（AWT）研究马拉硫磷的声化学降解。使用130kHz的AWT研究杀虫剂溶液的分解。在不同时间间隔使用高效液相色谱法（HPLC）对样品进行分析。比较了AWT在不同时间（20、40、60、80、100和120分钟）、马拉硫磷浓度为2、4和8mg/L以及设备功率（300W、400W、500W）下的效果。
这些结果表明，较低浓度的马拉硫磷杀虫剂降解程度高于较高浓度。此外，功率增加与马拉硫磷降解能力之间存在正相关。
成功实现了不同浓度和功率下马拉硫磷的声降解。结果表明，声波技术可用于利用高频降低溶解杀虫剂的浓度。
