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《ACTA SCIENTIAE CIRCUMSTANTIAE》 2000-05
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Studies on photodegradation of carbendazim in solvents and aqueous solutions

XU Baocai,YUE Yongde,HU Yinghui,HUA Rimao\ (Anhui Agricultural University,Hefei\ 230036)  
Under sunlight or high pressure mercury lamp(HPML),the phototransformation of carbendazim in solvents and aqueous solutions was studied.The main results were summarized as follows:Carbendazim decomposed very slowly in aqueous phase, n \|hexane and methanol under sunlight.The photolytic rate of MBC in acetone was high with half\|life of 33.80?h.Photosensitizer such as riboflavin,0 5% acetone and Fe +3 ,can enhance photolysis of MBC in aqueous solutions.Among them,riboflavin is the most senstivive one MBC can be degraded by 53 47% after 16 hours.Three pesticides,namely,triadimefon,butachlor,and carbofuran can affected significantly the photodecomposition of MBC in water under HPML.By 2 hours irradiation,the photoquench efficiency of triadimefon,butachlor and carbofuran on cabendazim are 244 05%,252 81%,and 262 92%,respectively.Under HPML,direct photolysis is the main process.The half\|life in redistilled water is 74 62?min.The photolytic rates of carbendazim in different water types or pH show following sequence:redistilled waterriver waterpond water,or,pH4pH9pH7.
【Fund】: 国家自然科学基金!资助项目 ( 2 98770 0 1 )
【CateGory Index】: X592
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