Sorção de atrazina e de mesotriona em latossolos e estimativa do potencial de contaminação

Química Nova

Rosane Martinazzo²  Deborah Pinheiro Dick¹  Mauro Mozael Hirsch¹  Simone Benvenuti Leite¹  Maria Do Carmo Ruaro Peralba¹ 

[1] ,Universidade Federal do Rio Grande do Sul Faculdade de Agronomia Departamento de SolosPorto Alegre RS ,Brasil

关键词: isotherm;    environmental risk;    pesticides;   

DOI  :  10.1590/S0100-40422011000800015

来源: SciELO

【 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】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License