Sorption of S-triazines in brazilian rainforest soils.
2008
MATALLO, M. B. | ALMEIDA, S. D. B. | COSTA, E. A. D. da | LUCHINI, L. C. | GOMES, M. A. F. | SPADOTTO, C. A. | CERDEIRA, A. L. | MOURA, M. A. M. | FRANCO, D. A. S. | MARCUS BARIFOUSE MATALLO, Instituto Biológico de Campinas; SIDNEY D. B. ALMEIDA, Instituto Biológico; EDUARDO ANTONIO DROLHE DA COSTA, APTA Vale do Paraíba; LUIZ CARLOS LUCHINI, Instituto Biológico; MARCO ANTONIO FERREIRA GOMES, CNPMA; CLAUDIO APARECIDO SPADOTTO, SGTE; ANTONIO LUIZ CERDEIRA, CNPMA; MONICA A M MOURA, Instituto Biológico; DANIEL ANDRADE SIQUEIRA FRANCO, APTA Campinas.
This research was conducted to evaluate the sorption of Ametryn, Atrazine, Simazine, Prometrine and Metamitron to soils from ?Mata Atlântica? at Ubatuba region (Atlantic rainforest soils), employing the batch equilibrium approach. The herbicides were weakly retained in soils with low soil organic matter (SOM) content and thus presenting high potential to water contamination. All herbicides have shown high Koc at Typic Humaquepts soil, the higher in SOM content. The sorption isotherms for the herbicides at Typic Humaquepts soil suggested specific interactions between herbicides and SOM probably with partial protonation of herbicides followed by ion-exchange processes and/or hydrogen bonding formation of hydroxyl groups on the SOM surface.
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