Electrocoagulation for removal of chemical oxygen demand and heavy metals in leachate from Jeram sanitary landfill, Malaysia
The increasing amount of solid waste generation in Malaysia has become a problem in Solid Waste Management (SWM), since it creates serious impact to the environment especially on the landfill site. The generation of leachate during landfilling operation may impair environment by contaminating sur...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/91441/1/FPAS%202013%205%20-%20IR.pdf http://psasir.upm.edu.my/id/eprint/91441/ |
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| Summary: | The increasing amount of solid waste generation in Malaysia has become a problem
in Solid Waste Management (SWM), since it creates serious impact to the
environment especially on the landfill site. The generation of leachate during
landfilling operation may impair environment by contaminating surface and ground
water system either directly or indirectly from the site. Eventhough at a present most
sanitary landfill is equipt with high level of leachate treatment facilities, leachate is
still considered as a significant source of environmental pollution because their
constituent that are difficult to be treated successfully. Therefore, innovative, cheap
and effective techniques of purifying landfill leachate are needed before the leachate
being discharged into water systems. The present study was conducted to investigate
the efficiency of electrocoagulation processes in the removal of Chemical Oxygen
Demand (COD) and heavy metals (Zn and Cu) from Jeram Sanitary Landfill leachate
influenced by several parameters, thus proposing the optimum condition for
pollutants removal. The electrocoagulation reaction was conducted in a batch reactor
using aluminum as sacrificial electrodes. The effecting parameters such as applied voltage, conductivity and initial pH were studied to determine the condition of
optimum removal. The variation of conductivity, pH and temperature also were
noted during the electrocoagulation process. In this process, samples of 25 mL were
taken out from the beaker at 10, 20, 40, 60, 80 and 100 minutes of electrolysis time.
From the results obtained, the optimum operation conditions of the
electrocoagulation process for the removal of COD, Zn and Cu was found to be as
follows: applied voltage of 10 V 0=0.0207 m.A/cm"), conductivity of 28.00 mS/cm
or lower, initial pH of 6 and 100 minuntes of electrolysis time. At these conditions,
approximately, 61.86 % COD, 74.41 % Zn and 97.47 % Cu removals can be reached.
In this study, the electrocoagulation process has proved to be effective in the removal
of COD and heavy metals from sanitary landfill leachate. |
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