Occurrence of endocrine disrupters and pharmaceuticals products in surface waters in the Atibaia river basin / Ocorrencia de interferentes endocrinos e produtos farmaceuticos nas aguas superficiais da bacia do rio Atibaia

AUTOR(ES)

Cassiana Carolina Montagner Raimundo

DATA DE PUBLICAÇÃO

2007

RESUMO

Numerous organic compounds called endocrine disruptors have been found at low levels in surface waters. Several compounds such as hormones (17b-estradiol, 17a-ethinylestradiol, estrone, progesterone and levonorgestrel), phthalates (diethylphthalate and dibutylphthalate), surfactants (4-octylphenol and 4-nonylphenol), bisphenol A, among others are included in this class. Some pharmaceutical products, such as paracetamol, acetyl salicylic acid, diclofenaco and ibuprofen have also been detected in surface waters. Due to the degradation of the surface water quality in the State of São Paulo. especially the Atibaia river which is used for public supply to the Campinas Metropolitan Region, this work presents an updated evaluation of the occurrence of 14 compounds mentioned above, as well as caffeine, used as a chemical tracer of human activity. The determination of these compounds was accomplished using established methods, including solid phase extraction (SPE) of 1 L of sample, followed by High Performance Liquid Chromagraphy (HPLC) equipped with DAD and fluorescence detector. In order to evaluate spatial and temporal variations, four sampling campaigns were carried out from February/2006 - January/2007, involving two dry and two wet seasons sampling series. From the 15 targeted compounds, 12 of them were found at least in one of the samples analyzed. Highest concentrations were found in Anhumas river in second sampling campaign (127 mg L of caffeine). Compounds more frequently found were caffeine, dibutylphthalate, bisphenol A and 17b-estradiol. Highest concentrations were associated to populational density and in the dry season. Ibuprofen, diethylphthalate and estrone not found considering the limit of detection of 51, 33 e 16 ng L, respectively.

ASSUNTO(S)

produtos farmaceuticos surface waters interferentes endocrinos pharmaceuticals products rio atibaia endocrine disrupters aguas superficiais atibaia river

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