Removal of metals from landfill enriched-leachate with electrolytic process

Min Her Leu, Juu En Chang

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

In this study, electrolytic processes were used to treat enriched-leachate. The characteristic of the enriched-leachate contains refractory pollutant for low BOD/COD ratio, metals (Cr, Cu, Zn, Pb....) and chloride (12700 mg/L). The overall plan of electrolytic process included electrolytic oxidation and electrolytic foam separation with chelating surfactant S40 (Sodium dimethyl dithiocarbamate). In electrolytic oxidation, chloride was used as supporting electrolyte to produce strong oxidant (Cl2/HClO) that could oxide refractory organics by indirect oxidation effect. The experimental results showed that the deep-brown color of enriched-leachate became light-yellow in 6 hours operation time by electrolytic oxidation, the COD removal of leachate was 54% under a current density 5.0 Amp./dm2. In addition a sequent electrolytic foam separation was used to separate metals from leachate. When the chelating surfactant to metals (S/M) ratio equaled to 1 and after 10 minutes flotation, removal of total metals were over 93%.

Original languageEnglish
Pages (from-to)452-459
Number of pages8
JournalProceedings of the International Conference on Solid Waste Technology and Management
Publication statusPublished - 1999 Dec 1
EventProceedings of the International Conference on Solid Waste Technology and Mangement - Philadelphia, PA, USA
Duration: 1999 Dec 121999 Dec 15

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Land fill
leachate
landfill
Oxidation
metal
oxidation
Chelation
Metals
Refractory materials
Foams
Surface active agents
foam
surfactant
chloride
Biochemical oxygen demand
Flotation
Oxidants
Current density
oxidant
electrolyte

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Waste Management and Disposal

Cite this

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title = "Removal of metals from landfill enriched-leachate with electrolytic process",
abstract = "In this study, electrolytic processes were used to treat enriched-leachate. The characteristic of the enriched-leachate contains refractory pollutant for low BOD/COD ratio, metals (Cr, Cu, Zn, Pb....) and chloride (12700 mg/L). The overall plan of electrolytic process included electrolytic oxidation and electrolytic foam separation with chelating surfactant S40 (Sodium dimethyl dithiocarbamate). In electrolytic oxidation, chloride was used as supporting electrolyte to produce strong oxidant (Cl2/HClO) that could oxide refractory organics by indirect oxidation effect. The experimental results showed that the deep-brown color of enriched-leachate became light-yellow in 6 hours operation time by electrolytic oxidation, the COD removal of leachate was 54{\%} under a current density 5.0 Amp./dm2. In addition a sequent electrolytic foam separation was used to separate metals from leachate. When the chelating surfactant to metals (S/M) ratio equaled to 1 and after 10 minutes flotation, removal of total metals were over 93{\%}.",
author = "Leu, {Min Her} and Chang, {Juu En}",
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journal = "Proceedings of the International Conference on Solid Waste Technology and Management",
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TY - JOUR

T1 - Removal of metals from landfill enriched-leachate with electrolytic process

AU - Leu, Min Her

AU - Chang, Juu En

PY - 1999/12/1

Y1 - 1999/12/1

N2 - In this study, electrolytic processes were used to treat enriched-leachate. The characteristic of the enriched-leachate contains refractory pollutant for low BOD/COD ratio, metals (Cr, Cu, Zn, Pb....) and chloride (12700 mg/L). The overall plan of electrolytic process included electrolytic oxidation and electrolytic foam separation with chelating surfactant S40 (Sodium dimethyl dithiocarbamate). In electrolytic oxidation, chloride was used as supporting electrolyte to produce strong oxidant (Cl2/HClO) that could oxide refractory organics by indirect oxidation effect. The experimental results showed that the deep-brown color of enriched-leachate became light-yellow in 6 hours operation time by electrolytic oxidation, the COD removal of leachate was 54% under a current density 5.0 Amp./dm2. In addition a sequent electrolytic foam separation was used to separate metals from leachate. When the chelating surfactant to metals (S/M) ratio equaled to 1 and after 10 minutes flotation, removal of total metals were over 93%.

AB - In this study, electrolytic processes were used to treat enriched-leachate. The characteristic of the enriched-leachate contains refractory pollutant for low BOD/COD ratio, metals (Cr, Cu, Zn, Pb....) and chloride (12700 mg/L). The overall plan of electrolytic process included electrolytic oxidation and electrolytic foam separation with chelating surfactant S40 (Sodium dimethyl dithiocarbamate). In electrolytic oxidation, chloride was used as supporting electrolyte to produce strong oxidant (Cl2/HClO) that could oxide refractory organics by indirect oxidation effect. The experimental results showed that the deep-brown color of enriched-leachate became light-yellow in 6 hours operation time by electrolytic oxidation, the COD removal of leachate was 54% under a current density 5.0 Amp./dm2. In addition a sequent electrolytic foam separation was used to separate metals from leachate. When the chelating surfactant to metals (S/M) ratio equaled to 1 and after 10 minutes flotation, removal of total metals were over 93%.

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