Treatment of Landfill Leachates by Electrodialysis in Three-chamber Cell Divided by Two Membranes

Chinese Journal of Applied Chemistry ›› 2009, Vol. 26 ›› Issue (11): 1336-1340.

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Treatment of Landfill Leachates by Electrodialysis in Three-chamber Cell Divided by Two Membranes

CHEN Ri-Yao¹, CHEN Zhen^1,2*, GENG Ya-Min¹, ZHENG Xi¹, CHEN Xiao¹

(1.College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007;
2.Chemistry Department,Fujian Ningde Teachers College,Ningde 352100)

Received:2008-10-09 Revised:2009-06-09 Published:2009-11-10 Online:2009-11-10
Supported by:
Fujian Provincial Natural Science Foundtion

Abstract

Abstract:

Electrodialysis and Fenton reagent method were combined to decrease the concentration of NH₄⁺-N and COD_Cr in landfill leachates by means of coupling membrane triple chamber cell. NH₄⁺-N in landfill leachates was enriched in catholyte by electrodialysis, then removed by chemical precipitation. In the meantime, Fe²⁺ was generated at the Fe anode. H₂O₂ was dropped into the anolyte to produce Fenton reagent, which could degrade organic compounds and decrease the concentration of COD_Cr. The experimental results show that the removal rate of NH₄⁺-N in simulated wastewater was up to 80% , and the concentrations of NH₄⁺-N and COD_Cr in the landfill leachates were decreased from 1982 mg/L and 2248mg/L to 200mg/L and 127mg/L,respectively.

Key words: landfill leachates, electrodialysis, Fenton reagent

CLC Number:

O646

CHEN Ri-Yao1, CHEN Zhen1,2*, GENG Ya-Min1, ZHENG Xi1, CHEN Xiao1. Treatment of Landfill Leachates by Electrodialysis in Three-chamber Cell Divided by Two Membranes[J]. Chinese Journal of Applied Chemistry, 2009, 26(11): 1336-1340.

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Treatment of Landfill Leachates by Electrodialysis in Three-chamber Cell Divided by Two Membranes

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