Quantitative analysis of toxic halogenated contaminants in Oluyoro stream of Nigeria |
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Authors: | Adedotun Adebowale Tuan Phan |
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Institution: | (1) Department of Chemistry, Texas Southern University, Houston, TX 77004, USA; |
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Abstract: | Analysis of organic contaminants is reported for the Oluyoro stream located in the South-Western Nigeria. Using gas chromatography
methods with flame ionization, electron capture and mass spectrometer detectors, alarming levels of organic pollutants including
alkanes, alkenes, alcohols and alkyl halides were detected. Remarkably, toxic halogenated organic substances such as 4,4′-dichlorodiphenyltrichloroethane
(4,4′-DDT), 4,4′-dichlorodiphenyldichloroethane (4,4′-DDD), beta-benzenehexachloride (beta-BHC), heptachlor epoxide, endrin
aldehyde and endrin ketone are found to be at 15,820, 6,176, 1,155, 336, 24 and 13 times, respectively, more than the permitted
levels of the United States Environmental Protection Agency (US-EPA). Furthermore, 4,4′-DDD, a probable human carcinogen,
and methoxychlor are detected for the first time when compared to the last report published in 1992. Activities such as high
influx of domestic and industrial wastes to the stream have drastically increased the concentrations of these halogenated
contaminants. Results presented in this article provide important information for potential future effects of these contaminants
on human health and the integrated environment in the region. |
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