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Type: Artigo de periódico
Title: Sorption And Desorption Of Sulfadimethoxine, Sulfaquinoxaline And Sulfamethazine Antimicrobials In Brazilian Soils.
Author: Doretto, Keity Margareth
Peruchi, Livia Maniero
Rath, Susanne
Abstract: Adsorption and desorption are important processes that influence the transport, transformation and bioavailability of antimicrobials in soils. The adsorption-desorption characteristics of sulfadimethoxine, sulfaquinoxaline and sulfamethazine in Brazilian soils (sandy, sandy-clay and clay) were evaluated using the batch equilibrium method. The sulfonamides were quantified in the soil solutions by a previously in house validated HPLC-PAD method. The adsorption/desorption data for the sulfonamides in soils fit the Freundlich isotherms well in the logarithmic form. The Freundlich adsorption coefficients ranged from 1.4 to 19.0 μg(1-1/n)(cm(3))(1/n)g(-1), suggesting that all of the sulfonamides weakly adsorbed on the evaluated soils. The Freundlich desorption coefficients ranged from 0.85 to 24.8 μg(1-1/n)(cm(3))(1/n)g(-1), indicating that the sulfonamides tend to be leached from soils with high sand and low organic carbon contents, suggesting that there is high potential for surface and groundwater contamination.
Subject: Adsorption
Anti-infective Agents
Models, Chemical
Soil Pollutants
Batch Equilibrium Method
Freundlich Sorption Isotherms
Veterinary Drugs
Citation: The Science Of The Total Environment. v. 476-477, p. 406-14, 2014-Apr.
Rights: fechado
Identifier DOI: 10.1016/j.scitotenv.2014.01.024
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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