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Evaluation of heavy metals and arsenic speciation discharged by the industrial activity on the Tinto-Odiel estuary, SW Spain |
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| Authors: | Pérez-López Rafael Nieto José Miguel López-Cascajosa M José Díaz-Blanco M Jesús Sarmiento Aguasanta M Oliveira Vanesa Sánchez-Rodas Daniel |
| Affiliation: | a Institute of Environmental Assessment and Water Research, IDÆA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain b Department of Geology, University of Huelva, Campus ‘El Carmen’, 21071 Huelva, Spain c Department of Chemical Engineering, University of Huelva, Campus ‘El Carmen’, 21071 Huelva, Spain d Department of Physicochemical, University of Cadiz, Polígono río San Pedro s/n, 11510 Puerto Real, Cadiz, Spain e Department of Chemistry and Material Sciences, University of Huelva, Campus ‘El Carmen’, 21071 Huelva, Spain |
| Abstract: | This study reports the annual amount of heavy metals discharged by industrial activity into the estuary of the Ría of Huelva (SW Spain). The findings showed that the discharged metals found in highest amounts were Fe (11 t y−1), Zn (3.4 t y−1) and Mo (0.88 t y−1). There were other metals with high pollutant charge, such as Ti (232 kg y−1), As (228 kg y−1), Ni (195 kg y−1), Pb (100 kg y−1), Cr (39 kg y−1) and Cd (33 kg y−1). These results were compared with pollutants transported via the Tinto and Odiel rivers from abandoned mining activities in the Iberian Pyrite Belt (IPB), and it was deduced that the amounts spilled exclusively by industries were less than 1% in relation to the total discharge. Hence, the treatment of residues from the IPB should be the priority goal to improve water quality in the estuary. |
| Keywords: | Heavy metal discharge Arsenic speciation Industrial activity Iberian Pyrite Belt Rí a of Huelva |
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