The Effect of Unsanitary Landfill on Groundwater Quality (Case Study: Borujerd City)

Document Type : Original Article

Authors

1 - Associate Professor, Department of Environment, Faculty of Natural Resources and Environment, Malayer University, Malayer, Hamedan, Iran.

2 M.Sc. Graduated, Department of Environment, Faculty of Natural Resources and Environment, Malayer University, Malayer, Hamedan, Iran.

Abstract

Municipal solid waste landfill sites contaminate the surrounding groundwater by releasing pollutants due to leachate infiltration. The purpose of this study was to evaluate the groundwater quality around the Borujerd municipal landfill. To measure water quality variables, Atomic Absorption Spectrophotometer (AAS), Flame Photometer, pH, and EC meter were used. The results showed that the mean concentrations of lead, iron, nickel, zinc, copper, sodium, potassium, and nitrate in the downstream region were 1.36, 7.42, ND (Non-detectable), 2.87, 0.035, 136.84, 88.19, and 17.55 mg/l, respectively. Also the mean pH of 7 and the mean EC of 0.013 ds/cm were obtained. In the upstream region the values were 1.39, 4.39, ND, 1.43, 0.01, 32.8, 2.36, 5.86 mg/l, respectively. The mean pH was 7.33 and the mean EC was 0.008 ds/cm.
 Comparison of heavy metal concentrations and groundwater parameters around the landfill and control area showed that except for lead, concentrations around the landfill were higher than the control values. Comparison of heavy metal concentrations and groundwater parameters around landfill and control area with WHO standard showed that the values of lead and iron (in groundwater around landfill and control area) and potassium (in groundwater around landfill) was significantly higher than the WHO standard. Zinc, copper, sodium and nitrate concentrations were lower than this standard. The results of the HEI and HPI indices showed that the groundwater in the area is contaminated with heavy metals. The results of this study indicated that groundwater contamination around landfills was due to landfill leachate.

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References

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Iran-Water Resources Research
Volume 18, Issue 2 - Serial Number 61
September 2022
Pages 98-110

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History

  • Receive Date: 07 November 2020
  • Revise Date: 04 August 2022
  • Accept Date: 06 August 2022

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