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Degradation of Fungicide Tolclofos-methyl by Chemical Treatment

살균제 Tolclofos-methyl의 화학적 처리에 의한 분해

  • Shin, Kab-Sik (School of Applied Biosciences, Kyungpook National University) ;
  • Jeon, Young-Hwan (School of Applied Biosciences, Kyungpook National University) ;
  • Kim, Hyo-Young (School of Applied Biosciences, Kyungpook National University) ;
  • Hwang, Jung-In (School of Applied Biosciences, Kyungpook National University) ;
  • Lee, Sang-Man (School of Applied Biosciences, Kyungpook National University) ;
  • Shin, Jae-Ho (School of Applied Biosciences, Kyungpook National University) ;
  • Kim, Jang-Eok (School of Applied Biosciences, Kyungpook National University)
  • 신갑식 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 전영환 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 김효영 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 황정인 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 이상만 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 신재호 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 김장억 (경북대학교 농업생명과학대학 응용생명과학부)
  • Received : 2010.11.19
  • Accepted : 2010.12.20
  • Published : 2010.12.30

Abstract

Tolclofos-methyl is one of the most widely used organophosphorous pesticides in control of soil-borne diseases in ginseng field. In Korea, residues of tolclofosmethyl in ginseng and cultivation soil is quite often detecting. The objective of this study was to know the possibility for the accelerated degradation of tolclofos-methyl by various chemical treatment under soil slurry condition. The degradation of tolclofos-methyl was accelerated by zerovalent metals treatment in soil slurry. The degradation rate of tolclofos-methyl was found to be at higher zerovalent zinc than unannealed zerovalent and annealed zerovalent iron. The effect of different sizes of zerovalent iron on tolclofos-methyl degradation was showed that the smaller size of zerovalent iron, the greater the degradation rate. In aqueous solution of pH 4.0 below the degradation rate of tolclofos-methyl was very high. Under this experimental condition, tolclofos-methyl degradation was the greatest at 2% (w/v) of ZVI under 0.1 N of HCl in 24 hours, the degradation rate was 94.4%. By testing various chemicals, it was found that $Fe_2(SO_4)_3$ as iron source showed better for degrading tolclofos-methyl in $H_2O_2$ 500 mM treatment and sodium sulfite also showed the degradable possibility tolclofos-methyl in soil slurry.

Acknowledgement

Supported by : 농촌진흥청

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Cited by

  1. Translocation of Tolclofos-methyl from Ginseng Cultivated Soil to Ginseng (Panax ginseng C. A. Meyer) and Residue Analysis of Various Pesticides in Ginseng and Soil vol.18, pp.3, 2014, https://doi.org/10.7585/kjps.2014.18.3.130
  2. Evaluation of Residual Pesticides in Fresh Ginseng Collected in Seoul vol.56, pp.1, 2013, https://doi.org/10.3839/jabc.2013.006