生态与农村环境学报 ›› 2012, Vol. 28 ›› Issue (5): 539-543.doi:

• 污染控制与修复 • 上一篇    下一篇

丁虫腈在环境中的降解特性

何健,孔德洋,吴文铸,宋宁慧,单正军   

  1. 南京农业大学资源与环境科学学院

  • 收稿日期:2012-02-15 修回日期:2012-04-25 出版日期:2012-09-25 发布日期:2012-10-08
  • 通讯作者: 单正军 环境保护部部南京环境科学研究所 E-mail:szj@nies.org
  • 作者简介:何健(1988-),男,江苏淮安人,硕士生,主要从事污染物环境行为研究。E-mail:hejian0207@hotmail.com
  • 基金资助:
    国家自然科学基金(41101307);环保公益性行业科研专项(201109038

Degradation of Flufiprole in the Environment

HE  Jian, KONG  De-Yang, WU  Wen-Zhu, SONG  Ning-Hui, SHAN  Zheng-Jun   

  1. College of Resources and Environmental Sciences,Nanjing Agricultural University
  • Received:2012-02-15 Revised:2012-04-25 Online:2012-09-25 Published:2012-10-08
  • Contact: SHAN Zheng-Jun Nanjing Institute of Environmental Sciences,Ministry of Environmental Protection E-mail:szj@nies.org

摘要: 采用室内模拟试验研究丁虫腈在水体中的光解、水解及其在3种不同类型土壤中的降解特性。结果表明,丁虫腈在酸性和中性条件下比较稳定,不易水解,而在碱性条件下水解较快,在50 ℃、pH值为9.0的缓冲溶液中降解半衰期为26.7 d。通过对水解产物的鉴定,推断丁虫腈的水解机理为碱催化水解。在[光]照度为2 500 lx、紫外强度为25 μW·cm-2 的人工光源氙灯条件下,丁虫腈的降解半衰期为1.5 h,主要降解产物为氟虫腈。丁虫腈在太湖水稻土、江西红壤和陕西潮土中培养180 d以后均未发生明显降解,表明该农药在土壤中较难降解。

关键词: 丁虫腈, 光解, 水解, 土壤降解

Abstract: Degradation of flufiprole in water via various mechanisms,hydrolysis and photolysis,and in 3 different types of soil was investigated under laboratory conditions.Results show that flufiprole is rather stable and not easy to break down in acid and neutral solutions,but easily gets hydrolyzed in alkaline solution with half-life being 26.7 d in solution 9.0 in pH and 50 ℃ in temperature.Through identification of its hydrolytic products,it could be inferred that the hydrolysis of flufiprole in water is alkali-catalyzed one.Under the artificial light of a Xe lamp,2500 lx in light intensity and 25 μW·cm-2,flufiprole has a half-life of 1.5 hour,and its photolytic produce was mainly fipronil.But in the paddy soil of Taihu,red soil of Jiangxi and fluo-aquic soil of Shaanxi,flufiprole was found almost unchanged after 180 days of incubation,suggesting that flufiprole is hard to break down in soil.

Key words: flufiprole, photolysis, hydrolysis, degradation in soil

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