Occurrence and sorption of fluoroquinolones in poultry litters and soils from sao Paulo State, Brazil

Autor(es)

Pereira Leal, Rafael Marques ^[1] ; Figueira, Rafael Fernandes ^[1] ; Tornisielo, Valdemar Luiz ^[1] ; Regitano, Jussara Borges ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Lab Ecotoxicol, BR-13400970 Piracicaba, SP - Brazil

^[2] Univ Sao Paulo, ESALQ USP, Super Sch Agr Luiz de Queiroz, Dept Soil Sci, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 432, p. 344-349, AUG 15 2012.
• Citações Web of Science: 58

Resumo

Animal production is one of the most expressive sectors of Brazilian agro-economy. Although antibiotics are routinely used in this activity, their occurrence, fate, and potential impacts to the local environment are largely unknown. This research evaluated sorption-desorption and occurrence of four commonly used fluoroquinolones (norfloxacin, ciprofloxacin, danofloxacin, and enrofloxacin) in poultry litter and soil samples from Sao Paulo State, Brazil. The sorption-desorption studies involved batch equilibration technique and followed the OECD guideline for pesticides. All compounds were analyzed by HPLC, using fluorescence detector. Fluoroquinolones' sorption potential to the poultry litters (K-d <= 65 L kg(-1)) was lower than to the soil (K-d similar to 40,000 L kg(-1)), but was always high (>= 69% of applied amount) indicating a higher specificity of fluoroquinolones interaction with soils. The addition of poultry litter (5%) to the soil had not affected sorption or desorption of these compounds. Desorption was negligible in the soil (<= 0.5% of sorbed amount), but not in the poultry litters (up to 42% of sorbed amount). Fluoroquinolones' mean concentrations found in the poultry litters (1.37 to 6.68 mg kg(-1)) and soils (22.93 mu g kg(-1)) were compatible to those found elsewhere (Austria, China, and Turkey). Enrofloxacin was the most often detected compound (30% of poultry litters and 27% of soils) at the highest mean concentrations (6.68 mg kg(-1) for poultry litters and 22.93 mu g kg(-1) for soils). These results show that antibiotics are routinely used in poultry production and might represent one potential source of pollution to the environment that has been largely ignored and should be further investigated in Brazil. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 09/01596-9 - Monitoramento ambiental de resíduos de antibióticos usados na avicultura brasileira
• Beneficiário: Jussara Borges Regitano
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 07/08425-0 - Ocorrência e comportamento no ambiente de resíduos de antibióticos de uso veterinário
• Beneficiário: Rafael Marques Pereira Leal
• Modalidade de apoio: Bolsas no Brasil - Doutorado