Sorção de Diuron em minerais da fração argila

Química Nova

Izabel Cristina Leinig Araujo²  Vander De Freitas Melo²  Gilberto Abate¹  Rafael Garrett Dolatto¹ 

[1] ,Universidade Federal do Paraná Setor de Ciências Agrárias Departamento de Solos e Engenharia AgrícolaCuritiba PR ,Brasil

关键词: smectite;    Fe oxides;    herbicides;   

DOI  :  10.1590/S0100-40422012000700006

来源: SciELO

【 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】

CC BY-NC   
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