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Environmental Science and Pollution Research

, Volume 23, Issue 11, pp 10577–10586 | Cite as

Effect of EDTA, EDDS, NTA and citric acid on electrokinetic remediation of As, Cd, Cr, Cu, Ni, Pb and Zn contaminated dredged marine sediment

  • Yue Song
  • Mohamed-Tahar Ammami
  • Ahmed BenamarEmail author
  • Salim Mezazigh
  • Huaqing Wang
Recent sediments: environmental chemistry, ecotoxicology and engineering

Abstract

In recent years, electrokinetic (EK) remediation method has been widely considered to remove metal pollutants from contaminated dredged sediments. Chelating agents are used as electrolyte solutions to increase metal mobility. This study aims to investigate heavy metal (HM) (As, Cd, Cr, Cu, Ni, Pb and Zn) mobility by assessing the effect of different chelating agents (ethylenediaminetetraacetic acid (EDTA), ethylenediaminedisuccinic acid (EDDS), nitrilotriacetic acid (NTA) or citric acid (CA)) in enhancing EK remediation efficiency. The results show that, for the same concentration (0.1 mol L−1), EDTA is more suitable to enhance removal of Ni (52.8 %), Pb (60.1 %) and Zn (34.9 %). EDDS provides effectiveness to increase Cu removal efficiency (52 %), while EDTA and EDDS have a similar enhancement removal effect on As EK remediation (30.5∼31.3 %). CA is more suitable to enhance Cd removal (40.2 %). Similar Cr removal efficiency was provided by EK remediation tests (35.6∼43.5 %). In the migration of metal–chelate complexes being directed towards the anode, metals are accumulated in the middle sections of the sediment matrix for the tests performed with EDTA, NTA and CA. But, low accumulation of metal contamination in the sediment was observed in the test using EDDS.

Keywords

Electrokinetic Remediation Chelates Heavy metals Dredged sediment Removal 

Notes

Acknowledgments

This work was supported by Haute-Normandie Region (France) in the framework of the research network SCALE, within SEDEVAR project.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Yue Song
    • 1
    • 2
  • Mohamed-Tahar Ammami
    • 1
  • Ahmed Benamar
    • 1
    Email author
  • Salim Mezazigh
    • 2
  • Huaqing Wang
    • 1
  1. 1.Laboratoire Ondes et Milieux Complexes, UMR CNRS 6294Université du HavreLe HavreFrance
  2. 2.Laboratoire Morphodynamique Continentale et CôtièreUMR CNRS 6143 Université de CaenCaenFrance

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