Zoning concentration and ecological risk assessment of heavy metals in sediments of Mighan wetland

Document Type : Research Article


1 Assistant Professor, Faculty of Natural Resources and Environmental Science, Malayer University, Hamedan, Iran

2 M.Sc. Student of Environmental Pollution, Faculty of Natural Resources and Environmental Science, Malayer University, Hamedan, Iran


With the rise of population and the industry development, many pollutants had been released to environment. Besides, aquatic ecosystems are more vulnerable to chemicals with different combinations particularly heavy metals. In this study, the pollution of sediment around the basin of Mighan wetland with lead, zinc, and copper heavy metals was assessed by acid digestion and Atomic Absorption Spectroscopy, and Contamination Factor (CF) and Potential Ecological Risk Index (RI) were measured. Based on the results, comparisons of metal concentration with sediment quality guidelines (SQGs) were performed. Finally, zoning metals using Kernel Density Estimation showed that the southern and western parts of the wetlands because of industrial zones, agricultural lands wastewater, and industrial area have a high concentration of pollutants. Meanwhile, investigation of heavy metals represented a high concentration of copper metal relative to zinc and lead metals in the region. In the end, the requirement for contaminants controlling in the Mighan wetland is recommended.


Main Subjects

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Volume 4, Issue 2
June 2017
Pages 533-545
  • Receive Date: 30 December 2016
  • Revise Date: 05 February 2017
  • Accept Date: 15 March 2017
  • First Publish Date: 22 June 2017