Sorption of atrazine and mesotrione in oxisols and estimation of contamination potential

Química Nova

Hirsch, Mauro Mozael¹  Leite, Simone Benvenuti¹  Martinazzo, Rosane¹  Peralba, Maria do Carmo Ruaro¹  Dick, Deborah Pinheiro¹  Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil¹ 

关键词: isotherm;    environmental risk;    pesticides.;   

DOI  :  10.1590/S0100-40422011000800015

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Following application herbicides usually reach the soil and undergo several dissipation processes which determine their effects on target organisms and on the environment. This work aimed to evaluate atrazine and mesotrione sorption in Oxisols and estimate their potential impact on the environment. We observed that atrazine sorption was influenced by soil organic matter content and its hydrophobic character. Clay fraction was the main factor influencing mesotrione sorption followed in a lesser extent by soil organic matter content. In contrast to atrazine, mesotrione retention was favored by the higher carboxylic substitution in the aliphatic chains of soil organic matter. Atrazine and mesotrione were considered compounds that are likely to pose an appreciable risk of causing deleterious effects on the environment.

【 授权许可】

Unknown