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Experimental Investigation on Heavy Metal Adsorption From Sanitary Landfill Leachate Using Clay Layer Containing Zeolite

Shodjae, Ali | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41643 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Pak, Ali; Vosoughi, Manoochehr
  7. Abstract:
  8. Leachate migration from solid waste landfills into the subsurface environment is one of the significant problems of landfills. This can cause lots of problems for local soil and water to sources according to the contaminants appear in the leachate. Usually, landfill sites include at least one compact clay liner to prevent contamination of groundwater by produced leachate. Over the last decades investigators have been attracted to the structure and removal capacity of this liner. In this study, the effect of the addition of Zeolite to Kaolinite soil for the removal of heavy metal (manganese and zinc) from landfill leachate and the effect of decreasing the thickness of the soil layer has been investigated. The column used in this study, is made up of plexy glass with a inner diameter of 15 cm and height of 50 cm. Inlet synthesized leachate was produced in laboratory by solving ZnSO4.7H2O and MnSO4.H2O with different concentrations (5, 10 and 15 ppm) in distilled water. pH of the leachate was set to be 4.5 and 6.5. Atomic Absorption spectrophotometer facility was used to measure the heavy metal concentration in the outlet. Results indicate that by adding 3 to 9% of Zeolite, removal capacity of the clayey layer will increase up to 90%. Besides, it can be possible to decrease the layer thickness by adding Zeolite. Consequently, it can be interpreted that using a mixture of Zeolite and Kaolinite at the base of the landfill sites can make the impermeable layer more economical and effective.

  9. Keywords:
  10. Leachate ; Heavy Metals ; ZINC ; Manganese ; Zeolite ; Kaolinte

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