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http://dx.doi.org/10.5322/JESI.2019.28.8.689

Adsorption and Leaching Characteristics of Ionic Pesticides in the Soils of Jeju Island, Korea  

Chun, Si-Bum (Jeju National University Biotechnology Regional Innovation Center)
Hyun, Ik-Hyun (Research Institute of Health & Environment, Jeju Special-Governing Province)
Kam, Sang-Kyu (Department of Environmental Engineering, Jeju National University)
Publication Information
Journal of Environmental Science International / v.28, no.8, 2019 , pp. 689-700 More about this Journal
Abstract
The adsorption and leaching characteristics of five ionic pesticides including four acidic pesticides (2,4-D, dicamba, MCPA, and MCPP) and one amphoteric pesticide (imazaquin) in agricultural soils were investigated. Soils around spring waters that were heavily affected by pesticide run-off and soils around wells considering the regional characteristics in Jeju Island were collected at 24 stations. The Freundlich constant, $K_F$ value, which is a measure of the adsorption capacity, decreased in the order of 2,4-D > MCPA > MCPP > dicamba > imazaquin. The adsorption capacity of these ionic pesticides decreased with increasing pH owing to the effects of ionization of pesticides and different ionizable functional groups of soils. The leaching of ionic pesticides in the soil column showed a reverse relationship with their adsorption in soils, namely, the ionic pesticides were leached more quickly for the pesticides with lower adsorption capacity. The groundwater contamination potential of the ionic pesticides was evaluated in the order of imazaquin > MCPA > MCPP > dicamba > 2.4-D according to the groundwater ubiquity score based on soil Koc and the half-life of the pesticide.
Keywords
Adsorption; Leaching; Ionic pesticides; Soils of Jeju Island; Freundlich constant ($K_F$); Groundwater ubiquity score;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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