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

Quimica nova

Hirsch, Mauro Mozael¹  Leite, Simone Benvenuti¹  Martinazzo, Rosane¹  Peralba, Maria do Carmo Ruaro¹  Dick, Deborah Pinheiro¹ 

[1] Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil

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 applicationherbicides usually reach the soil and undergo several dissipation processeswhich determine their effects on target organisms and on the environment. Thiswork aimed to evaluate atrazine and mesotrione sorption in Oxisols and estimatetheir potential impact on the environment. We observed that atrazine sorptionwas influenced by soil organic matter content and its hydrophobic character.Clay fraction was the main factor influencing mesotrione sorption followed ina lesser extent by soil organic matter content. In contrast to atrazine, mesotrioneretention was favored by the higher carboxylic substitution in the aliphaticchains of soil organic matter. Atrazine and mesotrione were considered compoundsthat are likely to pose an appreciable risk of causing deleterious effects onthe environment.

【 授权许可】

CC BY