Coeficiente de distribuição do inseticida tiametoxam na fração mineral de solos sob efeito de ácidos orgânicos mono, di e tricarboxílicos

Química Nova

Samara Andrade Carvalho¹  José Maria De Lima¹  Niton Curi¹  Carlos Alberto Silva¹  João Paulo Vaz Floriano Toledo¹  Flávia Villela Soares¹ 

[1] ,Universidade Federal de Lavras Departamento de Ciência do Solo Lavras MG ,Brasil

关键词: pesticide;    distribution coefficient;    environmental contamination;   

DOI  :  10.1590/S0100-40422013000900008

来源: SciELO

【 摘 要 】

The aim of this study was to investigate the sorption and desorption of thiamethoxam in contrasting soils under the effect of organic acids. The results showed that MTo sorption had higher Kd. The presence of organic acids increased sorption and reduced desorption of thiamethoxam at MTo. The opposite was observed for the LVdf where the presence of 400 µmol L-1 of acid reduced the sorption of thiamethoxam in a concentration of 20 µmol L-1, not influencing desorption. The dynamics of organic acids with minerals from the soil particles were clarified by infrared analysis.

【 授权许可】

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