Pesquisa Agropecuária Brasileira
On-line version ISSN 1678-3921
OLIVEIRA, Maurílio Fernandes de; PRATES, Hélio Teixeira; SANTANNA, Derli Prudente and OLIVEIRA JUNIOR, Rubem Silvério de. Imazaquin sorption in surface and subsurface soil samples. Pesq. agropec. bras. [online]. 2006, vol.41, n.3, pp.461-468. ISSN 1678-3921. http://dx.doi.org/10.1590/S0100-204X2006000300013.
The objective of this work was to study the sorption and desorption of imazaquin, in surface and subsurface soil samples from Brazil. Sorption and desorption steps were carried out using batch equilibration and high performance liquid chromatography analytical routines. The value of Kf,ads was positively correlated with clay content, and negatively correlated with pH of supernatant. Samples from Typic Haplustox, clayey soil profile having high clay content, provided higher Kf,ads values, and negative correlation with organic carbon, silt content, cation exchange capacity and pH.
Keywords : retention; desorption; oxisol; sustainability.