Investigating the concentration of heavy metals (lead, chromium, zinc, nickel) in the municipal solid waste landfill of Sarayan using pollution indices

Ways to produced urban wastes is concern in most urban areas of Iran. Increasing population density, industrialization and the amount of waste produced are of great importance. The introduction of heavy metals through urban wastewater into natural ecosystems, especially soils, is one of the most important environmental concerns. The purpose of this study is to investigate the concentration of some heavy metals (lead, chromium, zinc, nickel) in the soil of landfill site of Sarayan.

For this purpose, 20 soil samples were collected from urban landfills and analyzed in a laboratory using Contraa 700 atomic absorption spectrophotometer and then analyzed by statistical techniques and Excel and IBM SPSS statistical software version 25.

To determine the contamination of the studied area, contamination factors (CF) and land accumulation (Igeo) were used and the results showed that the highest amount of contamination was related to surface-level chromium and the lowest was related to surface water and the amount of earthquake index Igeo) was found for chromium metal between 1 and 3.

According to the study, the chromium metal in the slightly infected and highly infected classes and other samples collected in non-infected classes of metals were slightly contaminated.