Comparative study of the metal pollution treatment from leachates by physical and biological methods

Authors

  • Hanane El Fadel Faculty of Science Dhar el Mahraz,PO Box 1796, Atlas-Fez, University of Sidi Mohamed Ben Abdellah, Fez, Morocco
  • Mohammed Merzouki Faculty of Science Dhar el Mahraz,PO Box 1796, Atlas-Fez, University of Sidi Mohamed Ben Abdellah, Fez, Morocco
  • Mohammed Benlemlih Faculty of Science Dhar el Mahraz,PO Box 1796, Atlas-Fez, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

Keywords:

Leachates, Filtration, Fly Ash, Heavy metals

Abstract

The purpose of this study is a comparative study of the treatment of the metallic pollution of the leachates of the controlled public landfill of the city of Fez by application of the biological processes by aeration and physical by filtration.

The treatment of leachates by aeration allows an accumulation of heavy metals (Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) by specific aerobic microorganisms present in the leachate, mainly Mn2+ ions with a rate of reduction between 90,8% and 93,3%.

For the physical treatment by infiltration-percolation, we carried out a comparative study of the filtrations on different matrices in order to choose the best filter medium. We used as filter media: three types of clay, fly ash, bottom ash and marine sand. The best reductions in heavy metals are observed with the filtering substrate S3 formed of clays designated A1 and fly ash, with concentrations lower than Moroccan standards for direct discharges and reduction rates higher than those found after 7 days of leachate treatment by aeration.

Author Biographies

Hanane El Fadel, Faculty of Science Dhar el Mahraz,PO Box 1796, Atlas-Fez, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

Department of Biology

Mohammed Merzouki, Faculty of Science Dhar el Mahraz,PO Box 1796, Atlas-Fez, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

Department of Biology

Mohammed Benlemlih, Faculty of Science Dhar el Mahraz,PO Box 1796, Atlas-Fez, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

Department of Biology

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Published

21-05-2024

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Section

Articles