Removal of Various Pollutants from Leachate Using a Low-Cost Technique: Integration of Electrolysis with Activated Carbon Contactor

Removal of Various Pollutants from Leachate Using a Low-Cost Technique: Integration of Electrolysis with Activated Carbon Contactor

Landfill leachate contains a high concentration of organic pollutants that are active agents in water pollution. This study was conducted to remove various pollutants from landfill leachate through electrolysis and activated carbon (AC) treatments. A simple electrolytic reactor was designed to inves...

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Bibliographic Details
Published in:Water, air, and soil pollution Vol. 225; no. 12; pp. 1 - 9
Main Authors: Ahsan, Amimul, Kamaludin, Masksedah, Rahman, M. M, Anwar, A. H. M. F, Bek, M. A, Idrus, S
Format: Journal Article
Language:English
Published: Cham Springer-Verlag 01-12-2014
Springer International Publishing
Springer
Springer Nature B.V
Subjects:
Activated carbon
Air conditioning
Alternating current
Atmospheric Protection/Air Quality Control/Air Pollution
Biochemical oxygen demand
Chemical oxygen demand
Civil engineering
Climate Change/Climate Change Impacts
Color removal
decolorization
Earth and Environmental Science
Efficiency
Effluents
electric current
Electric currents
Electrolysis
Environment
Environmental monitoring
Filtration
Hydrogeology
Laboratories
Landfill
landfill leachates
Landfills
Leachates
Methods
Organic contaminants
Oxidation
Pollutant removal
Pollutants
Retention
Soil Science & Conservation
Studies
Total dissolved solids
Total suspended solids
Waste disposal sites
Water pollution
Water Quality/Water Pollution
Water treatment
Malaysia
Electrolysis
Pollutants
Leachate
Activated carbon
BOD
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Summary:Landfill leachate contains a high concentration of organic pollutants that are active agents in water pollution. This study was conducted to remove various pollutants from landfill leachate through electrolysis and activated carbon (AC) treatments. A simple electrolytic reactor was designed to investigate the removal efficiency of these treatments for biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSSs), and total dissolved solids (TDSs) from landfill leachate at different electric current densities (CDs) and retention times (RTs). The results showed that the highest removal efficiencies for BOD and COD were 75.6 and 57 %, respectively, under a 7-V current for 4 h. It was also found that BOD, COD, TSS, and TDS removal efficiencies improved in proportion to an increase in CD and RT. However, pH gradually increased with an increase in CD and RT. A number of treated leachate samples were further polished by AC filtration to compare the effect of this additional process on the removal of color, BOD, COD, TSS, and TDS. This secondary treatment resulted in a higher removal of color and other pollutants than electrolysis alone. At 4 h RT, the BOD removal efficiency was 54.6 % at 3 V and 66.4 % at 5 V, and the efficiency increased to 61.5 and 70.5 %, respectively, after treatment by AC filtration. Under the same conditions, COD removal efficiency increased from 7.5 to 38.5 % at 3 V and from 31.1 to 49.5 % at 5 V. TSS and TDS removal efficiencies were also significantly improved by AC filtration. It is therefore concluded that 7 V of CD and 4 h of RT are the optimum parameters for removing pollutants from leachate and that the secondary treatment of AC filtration is an efficient method of further polishing.
Bibliography:http://dx.doi.org/10.1007/s11270-014-2163-y
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-014-2163-y