Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Behavior of Synthetic Pyrethroid Insecticide Bifenthrin in Soil Environment II) Identification of Degradation Product and Leaching of Bifenthrin in soil

합성 Pyrethroid 계 살충제인 Bifenthrin의 토양환경중 동태 제2보. Bifenthrin의 토양중 분해산물의 동정 및 용탈

  • Kim, Jang-Eok (Department of Agricultural Chemistry, College of Agriculture, Kyungpook National University) ;
  • Choi, Tae-Ho (Department of Agricultural Chemistry, College of Agriculture, Kyungpook National University)
  • 김장억 (경북대학교 농과대학 농화학과) ;
  • 최태호 (경북대학교 농과대학 농화학과)
  • Published : 1992.10.30
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Abstract

This study was conducted to know degradation products of the synthetic pyrethroid insecticide bifenthrin under soil, aqueous solution and UV-light irradation, and know its movement by leaching in soil. The major degradation product of bifenthrin was identified with 2-methylbiphenyl -3-y1 methanol by HPLC, UV, Mass and NMR under soil, aqueous solution and UV-light irradiation, The main degradation route was hydrolysis of the ester linkage. On exposure to UV-light, bifenthrin was decomposed almost completely in concentrations of 10 and 100 ppm in 24 hr but decomposed about 80% in 1,000 ppm. Bifenthrin was immobile in soil column system and on soil thin-layer chromatography system. Mostly bifenthrin remained in the 0-2.0㎝ layer of soil column and soil TLC.

토양 및 수용액조건에서와 자외선조사시의 bifenthrin의 주 분해대사산물을 확인하고 토양중 에서의 용탈을 조사한 결과는 다음과 같다. 토양 및 수용액조건에서와 자외선조사시 bifenthrin의 일차분해산물은 2-methylbiphenyl-3-ylmethanol로 HPLC, UV, Mass 및 NMR로 확인되었으며 bifenthrin의 주 분해경로는 ester결합의 가수분해 작용으로 나타났다. 자외선 조사시 bifenthrin은 첨가농도 10,100ppm에서 24시간만에 거의 분해 소실되었으며 1,000ppm일 때는 약 80%정도 분해되었다. Soil TLC 및 column상에서 bifenthrin은 거의 용탈되지 않고 표토에 존재하였다.

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