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Degradation of Leachate Biochemical Effluents Using Heat Activated Persulfacte Processes:Parameters Optimization and Removal Characteristics of Contaminants


Affiliations
1 Planning and Design Research Institute, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330031, China
2 School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China
 

Using heat to activate persulfacte for the generation of sulfate radicals (SO4 -.) was proposed for the treatment of leachate biochemical effluents. The effects of different variables on the oxidation efficiency, including oxidant dosage, temperature, pH value and reaction time, were investigated. The experimental results showed that the contaminants in the leachate biochemical effluents can be efficiently removed using the heat/Na2S2O8 system. Using the single factor variable method, the optimal conditions included 4 g/L oxidant dosage, 60°C reaction temperature, pH 4 and 12 h reaction time, resulting in the COD and colour removal efficiency of 63% and 100%, respectively. The analyses of three-dimensional excitationemission matrix fluorescence spectrum (3DEEMFS) and ultraviolet-visible spectra (UV-vis), both illuminated that the macromolecular HA in the wastewater samples were degraded into smaller molecular fulvic acids (FA) via heat/Na2S2O8 system. All these encouraged results demonstrated that the persulfacte activation used heat is a promising and efficient technology for the treatment of leachate biochemical effluents.

Keywords

Landfill Leachate, Heat Activation, Persulfacte Process, Sulfate Radicals.
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  • Degradation of Leachate Biochemical Effluents Using Heat Activated Persulfacte Processes:Parameters Optimization and Removal Characteristics of Contaminants

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Authors

Na Sun
Planning and Design Research Institute, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330031, China
Xian Li
School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China
Peng Zhan
School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China
Fengping Hu
Planning and Design Research Institute, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330031, China
Zhanmeng Liu
School of Civil Engineering and Architecture, East China Jiao Tong University, 808 East Shuanggang Road, Nanchang, 330013, China

Abstract


Using heat to activate persulfacte for the generation of sulfate radicals (SO4 -.) was proposed for the treatment of leachate biochemical effluents. The effects of different variables on the oxidation efficiency, including oxidant dosage, temperature, pH value and reaction time, were investigated. The experimental results showed that the contaminants in the leachate biochemical effluents can be efficiently removed using the heat/Na2S2O8 system. Using the single factor variable method, the optimal conditions included 4 g/L oxidant dosage, 60°C reaction temperature, pH 4 and 12 h reaction time, resulting in the COD and colour removal efficiency of 63% and 100%, respectively. The analyses of three-dimensional excitationemission matrix fluorescence spectrum (3DEEMFS) and ultraviolet-visible spectra (UV-vis), both illuminated that the macromolecular HA in the wastewater samples were degraded into smaller molecular fulvic acids (FA) via heat/Na2S2O8 system. All these encouraged results demonstrated that the persulfacte activation used heat is a promising and efficient technology for the treatment of leachate biochemical effluents.

Keywords


Landfill Leachate, Heat Activation, Persulfacte Process, Sulfate Radicals.

References