Environmental risk assessment of cobalt and manganese from industrial sources in an estuarine system
| Autor: | Miguel Izquierdo, R. Álvarez, Fernando Barrio-Parra, Javier Elío, J.E. García-González, E. De Miguel |
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| Rok vydání: | 2017 |
| Předmět: |
Geologic Sediments
Environmental Engineering 010504 meteorology & atmospheric sciences Phthalic Acids Biological Availability Industrial Waste chemistry.chemical_element Fractionation Manganese 010501 environmental sciences Risk Assessment 01 natural sciences Calcium Carbonate Geochemistry and Petrology Soil Pollutants Environmental Chemistry Seawater 0105 earth and related environmental sciences General Environmental Science Water Science and Technology Total organic carbon Extraction (chemistry) Environmental engineering Sediment Cobalt General Medicine Hydrogen-Ion Concentration Bioavailability chemistry Spain Environmental chemistry Environmental science Estuaries Oxidation-Reduction Surface water Water Pollutants Chemical |
| Zdroj: | Environmental Geochemistry and Health. 40:737-748 |
| ISSN: | 1573-2983 0269-4042 |
| DOI: | 10.1007/s10653-017-0020-9 |
| Popis: | A total of 74 samples of soil, sediment, industrial sludge, and surface water were collected in a Mediterranean estuarine system in order to assess the potential ecological impact of elevated concentrations of Co and Mn associated with a Terephthalic (PTA) and Isophthalic (PIPA) acids production plant. Samples were analyzed for elemental composition (37 elements), pH, redox potential, organic carbon, and CaCO3 content, and a group of 16 selected samples were additionally subjected to a Tessier sequential extraction. Co and Mn soil concentrations were significantly higher inside the industrial facility and around its perimeter than in background samples, and maximum dissolved Co and Mn concentrations were found in a creek near the plant's discharge point, reaching values 17,700 and 156 times higher than their respective background concentrations. The ecological risk was evaluated as a function of Co and Mn fractionation and bioavailability which were controlled by the environmental conditions generated by the advance of seawater into the estuarine system during high tide. Co appeared to precipitate near the river mouth due to the pH increase produced by the influence of seawater intrusion, reaching hazardous concentrations in sediments. In terms of their bioavailability and the corresponding risk assessment code, both Co and Mn present sediment concentrations that result in medium to high ecological risk whereas water concentrations of both elements reach values that more than double their corresponding Secondary Acute Values. |
| Databáze: | OpenAIRE |
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