Diuron sorption onto clay mineral fractions

Química Nova

Melo, Vander de Freitas¹  Universidade Federal do Paraná, Curitiba, Brasil¹  Araujo, Izabel Cristina Leinig¹  Abate, Gilberto¹  Dolatto, Rafael Garrett¹ 

关键词: smectite;    Fe oxides;    herbicides.;   

DOI  :  10.1590/S0100-40422012000700006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The objective of the present study was to evaluate the adsorption of the herbicide Diuron onto smectite and Fe oxides minerals. Ninety mg of each mineral, 1 mL of 0.15 mol L-1 CaCl2 and 8 mL of Diuron (0.25-10.00 mg L-1) were used in triplicates. These materials were shaken, ultra centrifuged and the supernatant collected and analysed on a UV-Vis spectrophotometer. The Diuron presented low adsorption onto clay mineral fractions. Adsorption was greater onto Fe oxides at pH 7.0, possibly due to proximity to the point of zero charge of these minerals.

【 授权许可】

Unknown