Sorption of the insecticide thiamethoxam by organic and mineral fraction from a brazilian oxisol

Química Nova

Curado, Lauro Dormivil de Amorim¹  Martins, Eucarlos de Lima¹  Weber, Oscarlina Lúcia dos Santos¹  Dores, Eliana Freire Gaspar de Carvalho¹  Universidade Federal de Mato Grosso, Cuiabá, Brasil¹ 

关键词: bath experiment;    soil organic matter;    environmental contamination.;   

DOI  :  10.1590/S0100-40422009000900003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The sorption of thiamethoxam in a Brazilian Oxisol was determined in soil samples with and without organic matter for two different dephs (0-0.1 and 0.4-0.7 m). The results indicated a predominant sorption of thiamethoxam on soil without organic matter. The following Kd values of 4.25 mL g-1 (0-0.1 m, r2 = 0.8534) and 5.30 mL g-1 (0.4-0.7 m, r2 = 0.9884) and Kf values, 7.65 mL g-1 (0-0.1 m, r2 = 0.9623) and 7.72 mL g-1 (0.4-0.7 m, r2 = 0.9775) were obtained. Those sorption coefficient values indicated a small interaction between thiamethoxam for both original soil and soil without organic matter.

【 授权许可】

Unknown