Using Urban Streams as Drinking Water: the Potential Risk in Respect to Polycyclic Aromatic Hydrocarbons (PAHs) Content in Sediments

Using Urban Streams as Drinking Water: the Potential Risk in Respect to Polycyclic Aromatic Hydrocarbons (PAHs) Content in Sediments

Author Nino, Leidy R. Google Scholar
Torres, Ronaldo José Autor UNIFESP Google Scholar
Mozeto, Antonio A. Google Scholar
Fadini, Pedro S. Google Scholar
Institution Universidade Federal de São Carlos (UFSCar)
Universidade Federal de São Paulo (UNIFESP)
Abstract Several polycyclic aromatic hydrocarbons are considered carcinogenic and mutagenic. 16 of these compounds are listed as priority control pollutants by the USEPA. the present study aimed at the evaluation of the presence of PAHs in sediments of an urban stream by GC-MS. the study area was located in Indaiatuba-São Paulo-Brazil, and supplies to approximately 40,000 people of a region with limited availability of water. Therefore, this water body flowing in the urban region represents a case study of the potential risk in using this water for drinking. the results show that, in general, the sampling site near the intake of the water treatment plant for human consumption had the highest concentration of total PAHs (247.7 mu g kg(-1)). This is the site that presents more contact with urban pollution and surface runoff from the streets. the PAHs composition pattern by ring number presented a higher proportion of hydrocarbons of 4- and 5-rings, and showed a tendency, in the majority of the samples, of predominance of the high-molecular-weight PAHs, except for samples collected on June 2011 that had a high concentration of naphthalene (a 2-ring PAH). the application of a principal component analysis helped to identify the sources of hydrocarbons as pyrogenic (PC1) and petrogenic origin (PC2). Through this statistical tool it is postulated that, in some periods, the stream was exposed to point and non-point sources of contamination, showing that this type of water supply option has a high degree of vulnerability mainly during the first rain after of a long dry period, and its consumption can cause long-term problems.
Keywords PAHs
principal components analysis
sediment
urban water
Language English
Sponsor Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Date 2014-01-01
Published in Polycyclic Aromatic Compounds. Abingdon: Taylor & Francis Ltd, v. 34, n. 5, p. 518-531, 2014.
ISSN 1040-6638 (Sherpa/Romeo, impact factor)
Publisher Taylor & Francis Ltd
Extent 518-531
Origin http://dx.doi.org/10.1080/10406638.2014.918553
Access rights Closed access
Type Article
Web of Science ID WOS:000341570600004
URI http://repositorio.unifesp.br/handle/11600/37267

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