살균제 Tolclofos-methyl의 화학적 처리에 의한 분해
Degradation of Fungicide Tolclofos-methyl by Chemical Treatment
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
살균제 tolclofos-methyl은 인삼 및 인삼 경작지 토양에서 빈번히 검출되고 있어 그 안전성이 문제시되고 있다. 이에tolclofos-methyl을 토양 slurry조건에서 여러 종류의 화학적 처리를 통하여 분해되는 정도를 조사하였다. ZVI를 처리한 경우 uZVI가 aZVI보다 tolclofos-methyl의 분해를 촉진하였으며 uZVI와 ZVZn의 경우에는 ZVZn가 더 촉진시키는 것으로 나타났다. uZVI와 ZVZn 처리구에서는 처리량이증가할수록 그리고 입경이 작을수록 더 잘 분해되는 것으로나타났다. pH 4.0 이하의 산성 조건하에서 처리된 ZVI는tolclofos-methyl의 분해를 더욱 촉진시켜 수용액에서 24시간 만에 94.4%까지 분해시켰다. Fenton 반응을 이용한tolclofos-methyl의 분해는 iron source로 Fe2(SO4)3가 가장 효과적이었으며, H2O2 500 mM 처리구에서 93.5%까지분해되었다. Sodium bisulfite를 이용한 토양 slurry 중의tolclofos-methyl의 분해는 처리량이 증가할수록 분해가 촉진되었으며 50 mM 처리구에서 52.9%가 분해되었다.
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 tolclofos-methyl 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 Fe2(SO4)3 as iron source showed better for degrading tolclofos-methyl in H2O2 500 mM treatment and sodium sulfite also showed the degradable possibility tolclofos-methyl in soil slurry.
참고문헌 (16)
- Bian, H., "Dechlorination of chloroacetanilide herbicides by plant growth regulator sodium bisulfite", Wat. Res., 43, pp.3556~3574
- Fennelly, J. P., "Reaction of 1,1,1-trichloroethane with zero-valent metals and bimetallic reductants", Envirion. Sci. Technol., 32(13), pp.1980~1988
- Kim, B. H., "Degradation of herbicide paraquat by Fenton reagent and UV light irradiation", Korean J. Pestic. Sci., 3(3), pp.20~26
- 김장억, "안전사용기준에 따라 살포된 살균제 Tolclofos-methyl, Azoxystrobin 및 Difenoconazole의 인삼 중 잔류량", 한국약용작물학회지, 16(6), pp.390~396 (2008), 한국약용작물학회
- 이주희, "살충제 Cypermethrin 및 살균제 Diethofencarb의살포방법에 따른 인삼 중 잔류", 한국환경농학회지, 28(4), pp.412~418 (2009), 한국환경농학회
- Liu, Y., "Catalytic dechlorination of chlorophenols in waterby palladium", iron, pp.35(8), 1887~1899
- Min, Z. W., "Accelerated effect of ferric salts on degradation of thiophosphate fungicide, tolclofos-methyl by zerovalent iron", J. Korean Soc. Appl. Biol. Chem., 52(6), pp.681~687
- Morales, J., "Dechlorination of chlorinated phenols by catalyzed and un catalyzed Fe(0) and Mg(0) particles", J. Hazardous Mater., B90, pp.97~108
- Rahman, M. M., "Remediation of water contaminated with herbicide oxadiazon using Fenton reagent", J. Korean Soc. Appl. Biol. Chem., 53(4), pp.458~463
- Roberts, A. L., "Reductive elimination of chlorinated ethylenes by zero-valent metals", Envirion. Sci. Technol., 30(8), pp.2654~2659
- Sarathy, V., "Degradation of 1,2,3-trichloropropane(TCP) : hydrolysis, elimination and reduction by iron and zinc", Envirion. Sci. Technol., 44, pp.787~793 (2010)
- Shea, P. J., "Accelerated remediation of pesticide-contaminated soil with zerovalent iron", Environ. Pollut., 132, pp.183~188
- Shin., H. S., "Dechlorination of organochlorine insecticide, endosulfan by zerovalent iron", Korean J. Environ. Agric., 28(2), pp.202~208
- Tomlin, C. D. S., "The Pesticide Manual, fourteenth edition", pp.1043~1044, BCPC
- Villa, R. D., "Oxidation of p,p′ -DDT and p,p′-DDE in highly and long-term contaminated soil using Fenton reaction in a slurry system", Total Envirion, 371, pp.11~18
- Yun, J. K., "Dechlorination of the fungicide chlorothalonil by zerovalent iron and manganese oxides", Korean J. Pestic. Sci., 12(1), pp.43~49