Distribution coefficient of the insecticide thiamethoxam in the mineral fraction of soils under the effect of mono, di and tricarboxylic organic acids

Química Nova

Carvalho, Samara Andrade¹  Curi, Niton¹  Lima, José Maria de¹  Toledo, João Paulo Vaz Floriano¹  Soares, Flávia Villela¹  Universidade Federal de Lavras, Lavras, Brasil¹  Silva, Carlos Alberto¹ 

关键词: pesticide;    distribution coefficient;    environmental contamination.;   

DOI  :  10.1590/S0100-40422013000900008

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown