SORPTION OF DINICONAZOLE AND METOLACHLOR BY FOUR SOILS, CALCIUM‐ORGANIC MATTER AND CALCIUM‐MONTMORILLONITE
作者:
JEROME WEBER,
LEN SWAIN,
期刊:
Soil Science
(OVID Available online 1993)
卷期:
Volume 156,
issue 3
页码: 171-177
ISSN:0038-075X
年代: 1993
出版商: OVID
数据来源: OVID
摘要:
Diniconazole was sorbed by four soils in amounts 7 to 20 times that for metolachlor, by Ca-organic matter (Ca-OM) in amounts twice that for metolachlor, and by Camontmorillonite (Ca-Mont.) in amounts similar to metolachlor. Sorption of diniconazole greatly increased and desorption decreased from Ca-OM and Ca-Mont as solution pH decreased. Sorption by the soils, as indicated by Freundlich K values, were highly correlated with the organic carbon content of the soils for diniconazole and with organic carbon and clay contents of soils for metolachlor. Sorption of diniconazole was through physical sorption forces at neutral pH levels and was by way of cation exchange forces at low pH levels.
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