Spatial Eco-Risk Assessment of Heavy Metals in the Surface Soils of Industrial City of Aran-o-Bidgol, Iran
| Autor: | Saeed Masoum, Neda Ravankhah, Rouhollah Mirzaei |
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| Rok vydání: | 2015 |
| Předmět: |
010504 meteorology & atmospheric sciences
Soil test Health Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences Iran Toxicology 01 natural sciences Risk Assessment Soil Metals Heavy Humans Industry Soil Pollutants Cities 0105 earth and related environmental sciences Cadmium Ecology Urbanization Soil classification General Medicine Contamination Pollution Soil contamination chemistry Environmental chemistry Soil water Environmental science Spatial variability Environmental Monitoring |
| Zdroj: | Bulletin of environmental contamination and toxicology. 96(4) |
| ISSN: | 1432-0800 |
| Popis: | Heavy metals usually accumulate and migrate in soil environment due to human activities and this in return poses potential ecological and health risks. A total of 135 surface soil samples were collected from Aran-o-Bidgol City, Iran and were analyzed for their Cd, Pb, Ni and Cu concentrations to determine these elements' spatial distribution and potential ecological risks. To this end, interpolation mapping was conducted using Ordinary Kriging. The mean concentrations of Cd, Pb, Ni and Cu in the samples were 0.72, 11.41, 29.87 and 14.82 mg kg(-1), respectively, which were all higher than their background values. The spatial variation in the concentration of heavy metals could be attributable to point sources and vehicle emissions. Considering the severity of the potential ecological risks of metals, the descending order of contaminants' concentrations was Cd > Cu > Ni > Pb. The Potential Ecological Risk Index (RI) suggested that approximately 40 % and 59 % of the samples posed high and significantly high potential ecological risks, respectively. Moreover, ecological risk decreased progressively going from southwest to northeast over the under-study area. Considering the background values and RI, this area presented a relatively high level of contamination. |
| Databáze: | OpenAIRE |
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