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KMID : 1024519970060030285
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Journal of the Environmental Sciences
1997 Volume.6 No. 3 p.285 ~ p.291
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Adsorption of Chlorothalonil and Dicofol by the Soil of Cheju Island
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Kam Sang-Kyu
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Abstract
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In order to Investigate the adsorption characteristics of organochlorine pesticides chlorothaloul and dicofol with soul colors and re참tons far souls of an orange orchard, the souls were sampled at 3 re삼tons, respectively. among black volcanic, dark brown volcanic, and broom nonvolcanlc sorts. Every so6 has a higher clay proportion (49-75%) In sol tcuture and the organic carbon content and cation ekchange capacity with soil decreased in the following sequence: Black volcanic > Dark brown volcanic > Brown nonvolcanic sorts. Especially those In black volcauc trolls were much higher than others. The retention time, quantitative detection limit, and extractian , efficiencies of chlorothalonil and dicofol were 2.82min, 1.5ng/mL, 93.6% and 3.64min, 4.5ng/mL. 94 2%, repectlvely. The Freundlich constant, Kd, was higher in dicofol compared to chlorothalonil and In the black volcanic souls that have higher organic carbon content and cation Bkchange capacity. The Freundlich constant, 1 In, was In the range of 0.76-0.89 In the black volcanic sorts that have a higher organic matter(16.4-19.8%), whereas It was In the range of 1.02-1.13 In the brown nonvolcanic souls that have a lower organic matter(2.4-3.4%), and so It was considered that 1 In was dependent on the organic matter.
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KEYWORD
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adsorption, Kd, 1/n, chlorothalonil, dicofol, black valcanic soil, dark brown volcanic soil, brown nonvolcanoc soil
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