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Soil Washing Optimization, Recycling of the Solution, and Ecotoxicity Assessment for the Remediation of Pb-Contaminated Sites Using EDDS

Author

Listed:
  • Massimiliano Fabbricino

    (Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy)

  • Alberto Ferraro

    (Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via di Biasio 43, 03043 Cassino, Italy)

  • Vincenzo Luongo

    (Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy)

  • Ludovico Pontoni

    (Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy)

  • Marco Race

    (Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy)

Abstract

This paper presents the results of an experimental study aimed at investigating the applicability of ethylenediamine- N , N ′-disuccinic acid (EDDS) as a washing solution for the remediation of Pb-contaminated soil. All aspects of the treatment are analyzed and optimized, including the reuse and the final disposal of the EDDS spent solution. Different molar concentrations of the washing solutions and the efficiencies of varying solid/liquid ratio are tested at different pH values. More than 90% of the mobile Pb fraction is removed in about 24 h at pH 6. Accordingly, soil toxicity strongly decreases as a consequence of the treatment. The regenerated solution exhibits a reduced, but not negligible, extractive capacity. The total extraction of Pb is approximately 50% of the initial value after one regeneration cycle, and almost 20% after a second regeneration cycle. Respirometric tests, conducted using an activated sludge sampled in a municipal wastewater treatment plant, indicate that the spent solutions are not biodegradable, but they do not exert any toxic effect on the biomass. On the contrary, tests on regenerated solutions displayed the same biodegradability as the fresh ones.

Suggested Citation

  • Massimiliano Fabbricino & Alberto Ferraro & Vincenzo Luongo & Ludovico Pontoni & Marco Race, 2018. "Soil Washing Optimization, Recycling of the Solution, and Ecotoxicity Assessment for the Remediation of Pb-Contaminated Sites Using EDDS," Sustainability, MDPI, vol. 10(3), pages 1-12, February.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:3:p:636-:d:133893
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    Citations

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    Cited by:

    1. Mariusz Z. Gusiatin & Sylwia Pasieczna-Patkowska & Magdaléna Bálintová & Marcin Kuśmierz, 2023. "Treatment of Wastewater from Soil Washing with Soluble Humic Substances Using Biochars and Activated Carbon," Energies, MDPI, vol. 16(11), pages 1-31, May.
    2. Marco Race & Alberto Ferraro & Massimiliano Fabbricino & Agostino La Marca & Antonio Panico & Danilo Spasiano & Alice Tognacchini & Francesco Pirozzi, 2018. "Ethylenediamine- N , N ′-Disuccinic Acid (EDDS)—Enhanced Flushing Optimization for Contaminated Agricultural Soil Remediation and Assessment of Prospective Cu and Zn Transport," IJERPH, MDPI, vol. 15(3), pages 1-13, March.
    3. Yan Ma & Zhenhai Liu & Yanqiu Xu & Shengkun Zhou & Yi Wu & Jin Wang & Zhanbin Huang & Yi Shi, 2018. "Remediating Potentially Toxic Metal and Organic Co-Contamination of Soil by Combining In Situ Solidification/Stabilization and Chemical Oxidation: Efficacy, Mechanism, and Evaluation," IJERPH, MDPI, vol. 15(11), pages 1-19, November.
    4. Parviz Heidari & Antonio Panico, 2020. "Sorption Mechanism and Optimization Study for the Bioremediation of Pb(II) and Cd(II) Contamination by Two Novel Isolated Strains Q3 and Q5 of Bacillus sp," IJERPH, MDPI, vol. 17(11), pages 1-20, June.

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