生态与农村环境学报 ›› 2009, Vol. 25 ›› Issue (4): 88-91.doi: CNKI:SUN:NCST.0.2009-04-018

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甲氨基阿维菌素苯甲酸盐的降解性研究

孔德洋, 石利利, 单正军, 许静, 高士祥   

  1. 南京大学环境学院
  • 收稿日期:2009-02-27 出版日期:2009-10-25 发布日期:2011-04-08
  • 作者简介:孔德洋(1977-),男,山东滕州人,助理研究员,主要从事有机污染物的生态风险影响研究。E-mail:kongdeyang@hotmail.com
  • 基金资助:

    国家水体污染控制与治理科技重大专项(2008ZX07101-006-05)

Photolysis and Hydrolysis of Emamectin Benzoate and Its Degradation in Soils

 KONG  De-Yang, SHI  Li-Li, SHAN  Zheng-Jun, XU  Jing, GAO  Shi-Xiang   

  1. School of the Environment,Nanjing University
  • Received:2009-02-27 Online:2009-10-25 Published:2011-04-08

摘要: 采用室内模拟试验方法,测定了甲氨基阿维菌素苯甲酸盐在水体中光解、水解及其在东北黑土、江西红壤和太湖水稻土3种不同类型土壤中的降解特性,结果发现:在光[照]度为2 370 lx、紫外辐[射]照度为13.5μW·cm-2的人工光源氙灯条件下,甲氨基阿维菌素苯甲酸盐较易光解,半衰期为1.73 h;25℃时甲氨基阿维菌素苯甲酸盐在pH5.0、7.0条件下较难水解,推测其半衰期大于1 a,而在pH9.0条件下较易水解,半衰期为45.3 d,温度升高能加快其水解速率;甲氨基阿维菌素苯甲酸盐在江西红壤、太湖水稻土和东北黑土中的降解半衰期分别为16.3、91.2和41.5 d,其在土壤中的降解主要为微生物降解,降解速率与土壤有机质含量有关。 

关键词: 甲氨基阿维菌素苯甲酸盐, 光解, 水解, 土壤降解

Abstract: An indoor simulation experiment was carried out to study photolysis and hydrolysis of emamectin benzoate in buffer solution,and degradation of emamectin benzoate in three different types of soils,black soil from Northeast China,red soil from Jiangxi and paddy soil from the Lake Taihu region.Results show that the photolytic half-life of emamectin benzoate in solution under the Xe lamp with optical intensity of 2 370 lx and ultraviolet radiation intensity of 13.5 μW·cm-2 was determined to be 1.73 h.In solution with temperature 25 ℃ and pH 5.0 and 7.0 emamectin benzoate was hard to hydrolyze and its half-life was reckoned to be over 1 year.However,it was easy to hydrolyze in solution of pH 9.0 with a half-life being 45.3 days,which was shortened in solution of higher temperature.The half-life of emamectin benzoate in red soil,black soil and paddy soil was 16.3,41.5 and 91.2 days,respectively,which was affected mainly by biodegradation and hence the content of soil organic matter. 

Key words: emamectin benzoate, photolysis, hydrolysis, degradation in soil

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