살충제 Sulfoxaflor 및 대사체들의 토양 잔류 특성 (Residual Characteristics of Insecticide Sulfoxaflor and Its Metabolites in Soil)

서지정보

· 발행기관 : 한국농약과학회
· 수록지 정보 : 농약과학회지 / 24권 / 3호 / 312 ~ 320페이지
· 저자명 : 곽세연, 강자군, 이상협, 남애지, 이동주, 허예진, 김장억

초록

살충제 sulfoxaflor 및 대사체들의 토양 중에서의 동태를 파악하기 위하여 토양 중에서의 잔류양상 및 흡탈착 특성 그리고 저감화 정도를 조사하였다. 토양 중 sulfoxaflor의 토양 미생물 유무에 따른 잔류양상을 조사하기 위해 살균 및 비살균 토양에 대한 생물학적 분해 반감기를 조사한 결과 살균 토양에서 69.3-138.6일, 비살균 토양에서16.5-19.3일로 나타났다. Sulfoxaflor 및 대사체의 토양 중 흡착 양상은 시험 토양에서 대부분(sulfoxaflor 및 X-1 : 99%, X-2 : 98%) 흡착되어 유기물을 제거한 토양(sulfoxaflor : 76%, X-1 : 79%, X-2 : 67%)에 비해 높은 흡착율을보여 토양 유기물에 크게 영향을 받았다. 그러나 sulfoxaflor의 탈착율은 유기물의 유무에 관계없이 높게 나타났다.
토양에 잔류된 sulfoxaflor 및 대사체들을 저감시키기 위해 Fenton 반응을 유도한 결과 Fe2+를 처리하였을 때 분해율은 sulfoxaflor의 경우 2.4 %, 대사체들은 15.7-49.2%로 나타나Fe3+ 처리시 sulfoxaflor가 1.3%, 대사체들이 1.9-9.8% 분해된 것에 비해 높게 나타났다. 그러나, H2O2, UV 및 persulfate를 함께 처리한 경우에는 Fe2+ 처리시 40.2-100.0%, Fe3+ 처리시 1.2-100.0%를 보여 sulfoxaflor의 가속적인 저감화 효과를 나타내었다.

영어초록

In order to understand the behavior of the insecticide sulfoxaflor and its metabolites in the soil, the residual patterns, adsorption and desorption properties, and degree of reduction in soil were investigated.
To study the role of soil microbes on residual pattern of sulfoxaflor in soil, as the results of the biological half-life of sterilized and non-sterilized soil, it was calculated in the range of 69.3-138.6 days in sterilized soil and 16.5-19.3 days in non-sterilized soil. Sulfoxaflor and its metabolites were found to be higher in the soil with organic matter (sulfoxaflor and X-1 : 99%, X-2 : 98%), and lower amount of tested chemical were found in the soil without organic matter (sulfoxaflor : 76%, X-1 : 79%, X-2 : 67%). Thus, the adsorption of sulfoxaflor and metabolites was affected by soil organic matter. However, the desorption rate of sulfoxaflor was high regardless of the presence or absence of soil organic matter. The results of Fenton reaction to reduce residual sulfoxaflor and its metabolites in the soil was as followed. When Fe2+ (ferrous) was treated, the degradation rate was 2.4% for sulfoxaflor, and 15.7-49.2% for metabolites, which was higher than that of 1.3% of sulfoxaflor and 1.9-9.8% of metabolites when treated with Fe3+ (ferric). Additionally, the reaction kinetics was accelerated when H2O2, UV, and persulfate were treated together (with Fe2+ : 40.2-100.0%> with Fe3+ : 1.2-100.0%) and effective degradation has been achieved up to 100%.

참고자료

· 없음