본문 바로가기
HOME> 논문 > 논문 검색상세

학위논문 상세정보

殺蟲劑 Ethoprophos와 殺菌劑 procymidone의 土壤環境 중 動態 원문보기
Fate of Ethoprophos and Procymidone in Soil Environment

  • 저자

    최규일

  • 학위수여기관

    高麗大學校 大學院

  • 학위구분

    국내석사

  • 학과

    농화학과

  • 지도교수

  • 발행년도

    2004

  • 총페이지

    107p.

  • 키워드

    살충제 살균제 토양환경;

  • 언어

    kor

  • 원문 URL

    http://www.riss.kr/link?id=T10073466&outLink=K  

  • 초록

    살충제 ethoprophos와 살균제 procymidone의 토양 중 행적에 관한 흡·탈착, 분해, 용탈실험과 광분해 및 가수분해 실험을 하여 농업환경 중 동태를 규명코자 하였으며, 그 결과는 다음과 같다.흡착은 직선식과 Freundlich 식에 부합하였고, 분배계수는 ethoprophos 1.10∼3.11, procymidone 2.75∼12.18로 토양유기물에 비례하였다. 흡착에 미치는 온도 영향은 크지 않았고, 유기물의 산화에 흡착률이 감소하여 유기물의 영향이 큰 것으로 나타났다. Procymidone이 ethoprophos보다 강하게 흡착되어 탈착율이 낮았으며, 온도변화에 따른 반감기와 광분해는 ethoprophos가 짧게 조사되었다. 용탈이동성은 ethoprophos가 procymidone보다 크게 나타났으며, 가수분해 실험결과 procymidone은 알칼리 가수분해가 크게 나타났다. 이상의 결과 ethoprophos는 토양에서 흡착량이 낮고, 이동성이 높은 특징 및 빠른 분해특성을 보여지는바, 이동성 및 분해가 차지하는 비중이 크며, procymidone은 흡착량이 높고 이동성이 낮아 타환경계로의 전이 정도는 매우 낮은 것이며 이에 따른 약제의 소실은 살포된 당해 환경내에서 일어나게 될 것으로 판단되며, ethoprophos보다 분해가 어려우며 다소 느린 소실 속도를 보였다.


    Insecticides ethoprophos and fungicides procymidone were frequently detected on Korea agricultural products and farm land soil. So this study was focused on sorption properties, degradation by temperature, soil column leaching experiments, photolysis on soil surface under sunlight and hydrolysis at buffer solutions. Adsorption type of ethoprophos and procymidone were well fitted to Linear and Freundlich isotherm. Partition coefficient(Kd) were 1.10∼3.11 and 2.75∼12.18, respectively. The order of adsorption were Namgye>Baegsan>Jigog sereis proportion to organic matter contents. Freundlich isotherm Kf values ethoprophos and procymidone 1.64∼4.92 and 1.99∼9.98, 1/n values 0.55∼0.81, 0.74∼0.89, respectively. L-types adsorption indicates that strong adsorption were dependent on organic matter contents. Insignificant correlation between adsorption and temperature. Organic matter play an important role in adsorption levels, and oxdizied by H₂O₂ adsorption rate decreased. Ethoprophos desorption rate was 40.5∼75.9%(Namgye), 29.8∼43.5%(Jigog) and 31.4∼71.6%(Baegsan), hysteresis index(HI) was 0.24∼0.59, 0.56∼0.70, 0.28∼0.68. Procymidone desorption rate was 20.1∼34.0%(Namgye), 26.3∼44.6%(Jigog) and 31.6∼50.9%(Baegsan), HI was 0.65∼0.79, 0.55∼0.73, 0.49∼0.68 represents that procymidone more strongly adsorbed than ethoprophos. Half-lives of ethoprophos was 58.7∼84.5, 41.0∼55.0, 29.1∼52.5 days at 15, 25 and 40℃, respectively. Arrehenius activation energy(Ea) was 15.6(Namgye), 18.4(Jigog), 53.2KJ/mol (Baegsan) from 15 to 25℃. Procymidone half-lives was 76.2∼187.3, 75.3∼177.7, 17.0∼87.7 days at 15, 25 and 40℃, respectively. Arrehenius Ea was 13.8(Jigog), 40.6(Baegsan), 78.2KJ/mol (Namgye) from 25 to 40℃. Photolytic half-lives of ethoprophos and procymidone were 121∼165 hr and 630∼866 hr. Procymidone more stable than ethoprophos under sunlight, it's difficult to photolytic degradation. After 14 days leaching periods ethoprophos and procymidone was leached 14, 80, 74% and 0, 75, 48% from Namgye, Jigog and Baegsan series. Considering leaching availability ethoprophos and procymidone medium and low class, respectively. Hydrolysis of procymidone 85.5, 65.3 and 0.2


 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역