|
KMID : 0903520070500040321
|
|
Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2007 Volume.50 No. 4 p.321 ~ p.326
|
|
|
Degradation Patterns of Orgaonophosphorus Insecticide, Chlorpyrifos by Functionalized Zerovalent Iron
|
|
Kim Dai-Hyeon
Choi Choong-Lyeal
Kim Tae-Hwa
Park Man
Kim Jang-Eok
|
|
|
Abstract
|
|
|
|
An organophosphorus insecticide, chlorpyrifos, has been of a great concern due to persistence, tox- icity and accumulation in soils and groundwaters. This study deals with degradation efficiency and dechlorination kinetics of chlorpyrifos by various types of zerovalent irons (ZVIs) for effective remediation of the soils contaminated with chlorinated pesticides. Chlorpyrifos degradation rate was increased with increasing ZVI treatment amount and reaction time. The degradation rate and dechlorination kinetics of chlorpyrifos increased in the order of mZVI > nZVI > cZVI in solutions and soils. Dechlorination number value of chlorpyrifos by cZVI, nZVI and mZVI treatment exhib- ited 1.08, 3.09 and 3.18, respectively. In soils, degradation efficiency and kinetics of chlorpyrifos sig- nificantly were affected by moisture content because of the limited contact between ZVIs and chlorpyrifos. These results suggest that nanosized and functionalized mZVI could be effectively applied to degradation of chlorinated pesticides in the soil and aqueous environments.
|
|
|
KEYWORD
|
|
|
Zerovalent iron, Chlorpyrifos, Degradation, Dechlorination
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|