Abstract
A screening for microcontaminants performed by gas chromatography detected several microcontaminants in 12 sediment samples from the eutrophic estuary Guanabara Bay (GB) in southeastern Brazil. Bisphenol A (BPA) ranged from 1.4 to 20.3ngg-1, 4-octylphenol, from <limit of detection (LD) to 0.9ngg-1, 4-nonylphenol, from <LD to 3ngg-1, gemfibrozil, from <LD to 1.4ngg-1, naproxen, from <LD to 15.5ngg-1m Ibuprofen, from <LD ng g-1 and diclofenac, from <LD to 0.9ngg-1. Among estrogens, estrone, estradiol, ethinylestradiol and estriol were detected, ranging, respectively from <LD to 5.7ngg-1, <LD to 18.1ngg-1, <LD to 22.9ngg-1 and <LD to 0.5ngg-1. A strong and positive correlation between 4-nonylphenol and estrone and a moderate and positive correlation between bisphenol A and estradiol were noted. These findings demonstrating high levels of the detected microcontaminants in all analyzed samples, indicating chronic GB pollution.
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