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Environmental Effects of Using Chelating Agents in Polluted Sediment Remediation

  • Luca Di PalmaEmail author
  • Elisabetta Petrucci
  • Biancamaria Pietrangeli
Article

Abstract

The results of laboratory scale experimental tests of contaminant extraction from marine sediment slurries are presented and discussed. The objective of this study was to compare the effectiveness of EDTA and rhamnolipid in copper removal from an artificially contaminated sediment. The comparison was made in terms of metal extraction yield, and in the evaluation of its mobilization towards the more exchangeable fractions in the sediment. Results show that, under acidic conditions established during washing, EDTA ensured higher extractions efficiencies of Cu (up to 95 %) than rhamnolipid, although there was less mobilization into bioavailable forms with the use of rhamnolipid. In addition, in the view of a biological treatment of the spent solution, the use of rhamnolipid resulted in a lower decrease of the specific oxygen uptake rate with respect to EDTA. In fact, the low surfactants concentration required, partially compensated the toxic effect of Cu towards biomass.

Keywords

Sediment remediation Washing Biosurfactants Extractions Metal complexes Toxicity 

Notes

Acknowledgments

This work has been partially supported by INAIL, Grant. B 01/DIPIA, Programme 2009-11 P2.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Luca Di Palma
    • 1
    Email author
  • Elisabetta Petrucci
    • 1
  • Biancamaria Pietrangeli
    • 2
  1. 1.Dipartimento di Ingegneria Chimica Materiali AmbienteSapienza Università di RomaRomeItaly
  2. 2.Dipartimento AmbienteIstituto Nazionale Infortuni sul Lavoro (INAIL)RomeItaly

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