Sediment Toxicity and Ecological Risk of Trace Metals from Streams Surrounding a Municipal Solid Waste Landfill
- 257 Downloads
The present study is an attempt to assess the pollution intensity and corresponding ecological risk of heavy metals such as Cd, Ni, Pb, Cu, Zn and Cr using various indices like geo-accumulation index, concentration factor, pollution loading and ecological risk index. In all 21 surface sediments samples were collected from the stream flowing around the solid waste disposal landfill of Qayen city in southeastern Iran. Although Igeo values for Cd varied greatly, sites 18–21 with class 5 show heavy loads of Cd (values between 4.13 and 4.45). PLI values (3.37–12.89) clearly suggest strong contamination with respect to the measured metals. This study clearly indicates that the contamination risk in the downstream reservoir is much higher than upstream sites due to transfer and accumulation of leached metals from upstream to downstream.
KeywordsSurface sediment contamination Concentration factor Geo-accumulation index Potential ecological index
This study was funded by the Research Council of University of Birjand which as a Research Project was conducted in 2013. Authors are appreciated the authorities of Research Council and Faculty of Natural Resources and Environment, University of Birjand, due to their sincere cooperation. We also like to thank Dr. Mrs. Mahavash F. Kavian for editing the paper.
- Müller G (1986) Schadstoffe in Sedimenten—Sedimente als Schadstoffe. MitL österr Geol Ges 79:107–126Google Scholar
- Sayadi MH, Rezaei MR (2014) Impact of land use on the distribution of toxic metals in surface soils in Birjand city, Iran. Proc Int Acad Ecol Environ Sci 4(1):18–29Google Scholar
- Sayadi MH, Sayyed MRG, Saptarshi PG (2008) An assessment of the Chitgar River sediments for the short-term accumulation of the heavy metals from Tehran, Iran. Pollut Res 27(4):627–634Google Scholar
- Sayyed MRG, Sayadi MH (2011) Variations in the heavy metal accumulations within the surface soils from the Chitgar industrial area of Tehran. Proc Int Acad Ecol Environ Sci 1:36–46Google Scholar