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Performance of electrocoagulation process for the removal of heavy metals (copper, zinc, cobalt) from landfill leachate in Tehran
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Amir hossein Mahvi1   , Maryam Meserghani * 2, Zhila Agharezaei3 , Mina Shirjian4 |
1- Tehran University of Medical Sciences
2- Kerman University of Medical Sciences , m_eserghany@yahoo.com
3- Kerman University of Medical Sciences
4- Environmental Health. Tehran West Health Center |
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Abstract: (9921 Views) |
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Introduction: Heavy metal from municipal waste landfill leachate has caused many environmental problems . The purpose this study was investigate the efficiency of Ec process in removal of heavy metal (Cu,Zn,Co) of landfill leachate of Tehran on the economic performance.
Materials and Methods: This study was conducted as a pilot plant. using a Plexiglas tank glass with an effective size 0.7 liters containing 9 aluminum electrode was a page. In order to convert alternating current to direct the electrodes to the monopolar power supply were connected with a parallel arrangement. tank was filled with landfill leachate Tehran. Percent removal of heavy metals (Cu, Zn, Co) in the range of current density (50, 70, 90, 110 mA/cm2), reaction time (5, 10, 15, 20, 25, 30, 35 and 40 min) and pH values (4, 7, 9) was determined .
Findings: In this study, the optimal efficiency of removal of heavy metals in the leachate flow density 110 mA/cm2 after 25 time exposure (time optimal) in leachate pH, respectively88.2, 88.6 and 93.1 per cent respectively. Under these conditions the amount of electrical energy and electrode consumption, respectively, 3.7 kilowatt hours per cubic meter leachate and 1.26 gram aluminum. per liter of leachate was .
Discussion &Conclusion: This research study showed that electrocoagulation is an efficient technique for treatment of heavy metal(Cu, Zn, Co) landfill leachate Tehran. |
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| Keywords: Electrocoagulation, removal of heavy metal, Leachate, Operation cost. |
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Full-Text [PDF 738 kb]
(4142 Downloads)
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Type of Study: Research |
Subject:
Environmental health
Received: 2011/10/31 | Accepted: 2013/10/20 | Published: 2013/12/30
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