Abstract
In this study, 79 bulk precipitation samples were collected at two sampling sites near Büyükçekmece Lake, one of the important drinking water sources of Istanbul, for the period of October 2001 to July 2002. The study comprised the determination of trace and toxic metals concentrations in rain water. The concentrations of the metals in this study were found to be higher than those reported by other researchers around the world. The solubility of toxic metals was found in the order of Cd > Cu > V > Zn > Ni > Pb > Cr. Solubility of metals under acidic conditions (pH < 5.5) was approximately five times higher than those under neutral conditions with Cd as the most soluble metal (50% soluble). Statistical evaluations including seasonal variations, crustal enrichment factors, and correlation matrix were discussed to identify the possible sources of these pollutants. The study revealed that anthropogenic elements were highly enriched especially for Cd > Cu > Pb which were found to be highly enriched. Significant portion of Cu and Pb could be increased by the effect of local sources like cement industry in the area; however, the rest of the investigated trace metals could be brought to the sampling site by long-range transport to the Büyükçekmece Lake watershed area.
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Başak, B., Alagha, O. Trace metals solubility in rainwater: evaluation of rainwater quality at a watershed area, Istanbul. Environ Monit Assess 167, 493–503 (2010). https://doi.org/10.1007/s10661-009-1066-7
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DOI: https://doi.org/10.1007/s10661-009-1066-7