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Enhanced reducing leachate pollution index through electrocoagulation using response surface methodology
Fateme Ameli1, Hassan Hashemi2, Mohammad Reza Samaei2
1Department of Environmental Health Engineering, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran.
Heliyon
|October 9, 2024
Summary
Electrocoagulation effectively treats landfill leachate, significantly reducing its pollution index. This study demonstrates electrocoagulation
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
- Chemical Engineering
Background:
- Landfill leachate poses significant risks to human health and the environment.
- Effective management of landfill leachate is an urgent global challenge.
- Previous research has not experimentally evaluated electrocoagulation for leachate pollution index reduction.
Purpose of the Study:
- To investigate the efficacy of electrocoagulation (EC) in reducing the pollution potential of landfill leachate.
- To utilize the leachate pollution index (LPI) as a key metric for evaluating EC treatment efficiency.
- To optimize EC process parameters for maximum LPI reduction using Response Surface Methodology.
Main Methods:
- Application of Central Composite Design (CCD), a Response Surface Methodology (RSM) approach.
- Analysis of variance (ANOVA) and multivariate regression for data analysis.
- Assessment of variable interactions using 3D plots.
Main Results:
- Optimal EC conditions achieved high removal rates: 97.48% COD, 91.42% BOD5, 98.52% N-NH3, and 91.6% TDS.
- Significant reductions observed for TKN (94.81%), Cl- (87.20%), CN- (82.80%), As (96.66%), Cr (99.28%), Zn (99.18%), and Ni (96.56%).
- Leachate pollution index (LPI) decreased by 81%, from 38.06 to 7.22, meeting discharge standards.
Conclusions:
- Electrocoagulation is a highly effective method for treating landfill leachate.
- The EC process significantly reduces key pollutants and the overall LPI.
- Optimized EC treatment successfully meets established leachate discharge standards.
Keywords:
Central composite designElectrocoagulationLeachate pollution indexResponse surface methodologyMore Related Videos
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