02000naa a2200265 a 450000100080000000500110000800800410001910000140006024500960007426000090017052011650017965000160134465000240136065000180138465000130140265300110141565300270142665300160145370000190146970000230148870000200151170000200153170000300155177301530158110159702014-03-28       2007    bl uuuu     u00u1 u    #d1 aCARBO, L.  aAcetamiprid, carbendazim, diuron and thiamethoxam sorption in two Brazilian tropical soils.  c2007  aSorption of acetamiprid (E)-N1-[(6-chloro-3-pyridyl)methyl]-N2-cyano-N1-methylacetamidine), carbendazim (methyl benzimidazol-2-ylcarbamate), diuron (N-(3,4-dichlorophenyl)-N, N-dimethyl urea) and thiamethoxam (3-(2-chloro-thiazol-5-ylmethyl)-5-methyl-[1,3,5]oxadiazinan-4-ylidene-N-nitroamine) was evaluated in two Brazilian tropical soils, Oxisol and Entisol, from Primavera do Leste region, Mato Grosso State, Brazil. To describe the sorption process, batch experiments were carried out. Linear and Freundlich isotherm models were used to calculate the Kd and Kf coefficients from experimental data. The Kd values were utilized to calculate the partition coefficient normalized to soil organic carbon (Koc). For the pesticides acetamiprid, carbendazim, diuron and thiamenthoxan the Koc (mL g- 1) values ranged in both soils from 98 - 3235, 1024 - 2644, 145 - 2631 and 104 - 2877, respectively. From the studied pesticides, only carbendazim presented correlation (r2 = 0.82 and p &lt 0.01) with soil organic carbon (OC) content. Acetamiprid and thiamethoxam showed low sorption coefficients, representing a high risk of surface and ground water contamination.  aAgrotóxico  aPoluição da Água  aSolo Tropical  aSorção  aBrasil  aContaminação do solo  aMato Grosso1 aMARTINS, E. L.1 aDORES, E. F. G. C.1 aSPADOTTO, C. A.1 aWEBER, O. L. S.1 aDE-LAMONICA-FREIRE, E. M.  tJournal of Environmental Science and Health. Part B. Pesticides, Food Contaminants and Agricultural Wastes, New Yrokgv. 42, n. 5, p. 499-507, 2007.