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Treatment of Wastewater from Soil Washing with Soluble Humic Substances Using Biochars and Activated Carbon

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  • Mariusz Z. Gusiatin

    (Department of Environmental Biotechnology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Słoneczna St. 45G, 10-709 Olsztyn, Poland)

  • Sylwia Pasieczna-Patkowska

    (Department of Chemical Technology, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska 3, 20-031 Lublin, Poland)

  • Magdaléna Bálintová

    (Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, 04200 Kosice, Slovakia)

  • Marcin Kuśmierz

    (Analytical Laboratory, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska 3, 20-031 Lublin, Poland)

Abstract

Energy can be obtained by pyrolysis of organic wastes, and the solid residue of pyrolysis (biochar) can be used as an adsorbent for the treatment of various types of wastewater. Although soil washing can effectively remediate metal-contaminated soils, it can generate significant amounts of soil washing wastewater (SWW). This study investigated the effectiveness of using activated carbon and various biochars to treat SWW from the remediation of soil heavily contaminated with cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) with soluble humic substances (SHS) from municipal sewage sludge. Willow biochar (BW), plant biomass biochar (BPB), coconut shell biochar (BCH), and Norit SX2 activated carbon (ACN) were tested at different dosages (12.5–100 g/L) and adsorption times (30–1440 min) for the treatment of SWW. At 100 g/L dosage, biochar removed Cd, Cu, Ni, Pb, and Zn with 56–83%, 32–41%, 18–42%, 75–83%, and 44–83% efficiency, respectively, while ACN removed them with 87–95% efficiency. Only BW and ACN removed soluble organics with efficiencies of 49% and 94%, respectively, at the highest dosage. Adsorption of metals and soluble organics was mainly controlled by physisorption and chemisorption. Diffusion of metals and soluble organics into the different pore sizes was not the most important rate-limiting step. ACN and BW had better structural properties and treated SWW most effectively. BPB and BCH removed metals but not soluble organics, which could be beneficial for SHS recycling.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4311-:d:1155018
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    References listed on IDEAS

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    1. Zygmunt M. Gusiatin & Dorota Kulikowska & Barbara Klik, 2020. "New-Generation Washing Agents in Remediation of Metal-Polluted Soils and Methods for Washing Effluent Treatment: A Review," IJERPH, MDPI, vol. 17(17), pages 1-19, August.
    2. María Alejandra Décima & Simone Marzeddu & Margherita Barchiesi & Camilla Di Marcantonio & Agostina Chiavola & Maria Rosaria Boni, 2021. "A Review on the Removal of Carbamazepine from Aqueous Solution by Using Activated Carbon and Biochar," Sustainability, MDPI, vol. 13(21), pages 1-50, October.
    3. 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.
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