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Removal of Copper, Iron and Zinc from Soil Washing Effluents Containing Ethylenediaminedisuccinic Acid as Chelating Agent Through Sunlight Driven Nano-TiO2-Based Photocatalytic Processes

  • Laura Clarizia
  • Marco Race
  • Luca Onotri
  • Ilaria Di Somma
  • Nunzio Fiorentino
  • Roberto Andreozzi
  • Raffaele MarottaEmail author
Chapter
  • 902 Downloads

Abstract

The aim of the present study is the application of integrated solar nano-TiO2 based photocatalytic processes for the removal of copper, iron, zinc and (S,S)-ethylenediamine-N,N′-disuccinic acid (EDDS), used as chelating agent, from soil washing effluents produced by the remediation of samples of potentially polluted soils taken in the “Land of Fires” (Italy). Removal efficiencies of 93.5% (copper), 99.6% (iron), 99.4% (zinc), 97.2% (EDDS) and 80.7% (TOC) were reached through sunlight driven photocatalytic treatments carried out in parabolic trough collectors located in Naples (Italy). The removal degrees were achieved for an incident UVA solar energy per unit volume (Q j,n ) of 580 kJ L−1, estimated by taking into account both the effective irradiated surface area of the photoreactor (9.79 × 10−2 m2) and the local solar irradiances collected during the experiments. The combined nano-TiO2-photocatalytic processes applied were shown to sufficiently decontaminate the soil washing effluents to permit the recycling in the soil washing treatment or discharging to public sewers. The study suggests that the two-step solar photocatalytic process investigated can be really adopted as a useful solution for the decontamination of soil washing streams from some heavy metals and chelating organic agents.

Keywords

Solar nano-photocatalysis Soil washing effluent EDDS Metal removal Sacrificial nano-photocatalysis “Land of Fires” 

Notes

Acknowledgements

This study was carried out within the EU Project LIFE11 ENV/IT/000275 (ECOREMED).

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Laura Clarizia
    • 1
  • Marco Race
    • 2
  • Luca Onotri
    • 3
  • Ilaria Di Somma
    • 4
  • Nunzio Fiorentino
    • 3
  • Roberto Andreozzi
    • 1
    • 3
  • Raffaele Marotta
    • 1
    • 3
    Email author
  1. 1.Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione IndustrialeUniversità di Napoli Federico IINaplesItaly
  2. 2.Dipartimento di Ingegneria Civile, Edile ed AmbientaleUniversità di Napoli Federico IINaplesItaly
  3. 3.Centro Interdipartimentale di Ricerca AmbienteUniversità di Napoli Federico IINaplesItaly
  4. 4.Centro Nazionale delle Ricerche IRC-CNRIstituto di Ricerche sulla CombustioneNaplesItaly

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