합성 Pyrethroid 계 살충제인 Bifenthrin 의 토양환경중 동태 : 제2보 Bifenthrin 의 토양중 분해산물의 동정 및 용탈 Ⅱ Identification of Degradation Product and Leaching of Bifenthrin in soil = Behavior of Synthetic Pyrethroid Insecticide Bifenthrin in Soil Environment

국문 초록 (Abstract)

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.

다국어 초록 (Multilingual 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.