Sorption of Sulfachloropyridazine in Brazilian Soils

Author(s)

Alessandra Paula Vieira ^[1] ; Susanne Rath ^[2] ; Anne Hélène Fostier ^[3]

Affiliation

^[1] Universidade Estadual de Campinas. Instituto de Química - Brasil

^[2] Universidade Estadual de Campinas. Instituto de Química - Brasil

^[3] Universidade Estadual de Campinas. Instituto de Química - Brasil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 28, n. 1, p. 158-167, 2017-01-00.

Abstract

Sulfonamides are among the most widely employed antibacterial in veterinary medicine. Because a substantial proportion of sulfonamides are excreted unchanged as parent compounds after administration or are excreted as their metabolites through urine and feces, their presence in soils is a matter of concern. Adsorption and desorption are important processes that influence the transport, transformation and bioavailability of antimicrobials in soils, and data related to sorption capacity are therefore needed for environmental risk assessments. The sorption potential of sulfachloropyridazine (SCP) was assessed in four Brazilians soils using batch equilibrium experiments. The adsorption/desorption data fit well Freundlich isotherms. The sorption coefficients (KD) ranged from 1.00 to 4.48 cm3 g-1, and the Freundlich adsorption coefficient (KF) ranged from 1.89 to 5.63 µg1-1/n (cm3)1/n g-1 showing that SCP adsorption is generally low in the studied soils. The results were compared with previously published data obtained for the sorption of other sulfonamides in the same four soils. (AU)

• FAPESP's process: 09/17470-4 - SORPTION OF VETERINARY MEDICINES ON BRAZILIAN SOILS
• Grantee: Anne Helene Fostier
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/09543-7 - Residues of veterinary drugs in the environment
• Grantee: Susanne Rath
• Support Opportunities: Research Projects - Thematic Grants