The Zoning of Semi-Enclosed Bodies of Water According to the Sediment Pollution: The Bay of Algeciras as a Case Example |
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Authors: | Elisa Rojo-Nieto Carmen Garrido-Pérez Giorgio Anfuso-Melfi Francisco Lopez-Aguayo Diego Sales-Marquez Jose Antonio Perales-Vargas-Machuca |
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Institution: | (1) Andalusian Centre of Marine Science and Technology (CACYTMAR), Department of Environmental Technologies, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;(2) Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;(3) Department of Earth Sciences, Faculty of Marine and Environmental Sciences, University of Cadiz, 11510 Puerto Real, Cadiz, Spain |
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Abstract: | This paper reports a study of the occurrence and levels of polycyclic aromatic hydrocarbons (PAHs) in a bay characterised
by a chronic persistent impact. A total of 55 sediment samples were taken at different depths up to 111 m in two sampling
campaigns. Chemical analyses were carried out by gas chromatography-mass spectroscopy. The results indicate that: (1) significant
spatial variations exist, (2) levels of PAHs are related more strongly to the spatial distribution of sediments than to mineralogy/granulometry,
(3) the sediments are slightly-to-moderately contaminated by PAHs, and (4) these PAHs derive from pyrolytic and petrogenic
sources. Through use of an innovative data classification system (proposed according to depth and spatial location of sampling
points), and using factorial and cluster techniques, five zones have been differentiated depending on the contamination level
and source. |
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