Open dumping landfills are the most popular technique used to deal with Municipal solid waste in India. Landfills are a commonly used but also heavily polluted method of waste management. The improper design and maintenance of landfills have caused numerous environmental problems, such as the production of leachate and the emission of methane, which contributes to the increase in greenhouse gas emissions. Leachate is a liquid that enters a landfill from external sources such as rain. Delhi, India’s capital, currently have three high-operating landfill sites which are Ghazipur, Okhla, and Bhalswa. The types of contaminants that are present in leachate depend on the nature of the solid waste as well as the concurrent physical, chemical, and biological processes taking place inside the landfill. Hazardous metals like Pb, Zn, and Cd participate in biogeochemical cycles, and rather than the elements’ overall concentration, their mobility is mostly influenced by their chemical forms. Because of this, heavy metals in leachate may travel outside the confines of the disposal site and constitute a serious threat to the soil and water table nearby the landfill. In the present study, the Bhalswa dumpsite is selected, there is no liner system provided in this particular landfill. This study focuses on the change in characteristics and behavior of soil due to contamination from landfill leachate. The number of soil samples had been collected from the Bhalswa landfill to Delhi Technological University in lateral direction. The number of samples of leachate from Bhalswa landfill site has also been collected and estimated for chemical analysis. This chemical analysis includes parameters like pH, total dissolved solids, total hardness, alkalinity, sulphate, nitrate, electrical conductivity, chloride, and phosphate, calcium, magnesium.

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Effect of Leachate Contamination on Soil

  • Shivangi Bharadwaj,
  • Ashok Kumar Gupta,
  • Anil Kumar Sahu

摘要

Open dumping landfills are the most popular technique used to deal with Municipal solid waste in India. Landfills are a commonly used but also heavily polluted method of waste management. The improper design and maintenance of landfills have caused numerous environmental problems, such as the production of leachate and the emission of methane, which contributes to the increase in greenhouse gas emissions. Leachate is a liquid that enters a landfill from external sources such as rain. Delhi, India’s capital, currently have three high-operating landfill sites which are Ghazipur, Okhla, and Bhalswa. The types of contaminants that are present in leachate depend on the nature of the solid waste as well as the concurrent physical, chemical, and biological processes taking place inside the landfill. Hazardous metals like Pb, Zn, and Cd participate in biogeochemical cycles, and rather than the elements’ overall concentration, their mobility is mostly influenced by their chemical forms. Because of this, heavy metals in leachate may travel outside the confines of the disposal site and constitute a serious threat to the soil and water table nearby the landfill. In the present study, the Bhalswa dumpsite is selected, there is no liner system provided in this particular landfill. This study focuses on the change in characteristics and behavior of soil due to contamination from landfill leachate. The number of soil samples had been collected from the Bhalswa landfill to Delhi Technological University in lateral direction. The number of samples of leachate from Bhalswa landfill site has also been collected and estimated for chemical analysis. This chemical analysis includes parameters like pH, total dissolved solids, total hardness, alkalinity, sulphate, nitrate, electrical conductivity, chloride, and phosphate, calcium, magnesium.