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Remediation of Toxic Heavy Metal Contaminated Soil by Combining a Washing Ejector Based on Hydrodynamic Cavitation and Soil Washing Process

Author

Listed:
  • Hyunsoo Kim

    (Department of Energy and Resource Engineering, Chosun University, Gwangju 61452, Korea)

  • Kanghee Cho

    (Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea)

  • Oyunbileg Purev

    (Department of Energy and Resource Engineering, Chosun University, Gwangju 61452, Korea)

  • Nagchoul Choi

    (Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea)

  • Jaewon Lee

    (JIU Corporation, Seoul 07528, Korea)

Abstract

Based on the features of hydrodynamic cavitation, in this study, we developed a washing ejector that utilizes a high-pressure water jet. The cavitating flow was utilized to remove fine particles from contaminated soil. The volume of the contaminants and total metal concentration could be correlated to the fine-particle distribution in the contaminated soil. These particles can combine with a variety of pollutants. In this study, physical separation and soil washing as a two-step soil remediation strategy were performed to remediate contaminated soils from the smelter. A washing ejector was employed for physical separation, whereas phosphoric acid was used as the washing agent. The particles containing toxic heavy metals were composed of metal phase encapsulated in phyllosilicates, and metal phase weakly bound to phyllosilicate surfaces. The washing ejector involves the removal of fine particles bound to coarse particles and the dispersion of soil aggregates. From these results we determined that physical separation using a washing ejector was effective for the treatment of contaminated soil. Phosphoric acid (H 3 PO 4 ) was effective in extracting arsenic from contaminated soil in which arsenic was associated with amorphous iron oxides. Thus, the obtained results can provide useful information and technical support for field soil washing for the remediation of soil contaminated by toxic heavy metals through emissions from the mining and ore processing industries.

Suggested Citation

  • Hyunsoo Kim & Kanghee Cho & Oyunbileg Purev & Nagchoul Choi & Jaewon Lee, 2022. "Remediation of Toxic Heavy Metal Contaminated Soil by Combining a Washing Ejector Based on Hydrodynamic Cavitation and Soil Washing Process," IJERPH, MDPI, vol. 19(2), pages 1-14, January.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:2:p:786-:d:722353
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    References listed on IDEAS

    as
    1. Kanghee Cho & Eunji Myung & Hyunsoo Kim & Cheonyoung Park & Nagchoul Choi & Cheol Park, 2020. "Effect of Soil Washing Solutions on Simultaneous Removal of Heavy Metals and Arsenic from Contaminated Soil," IJERPH, MDPI, vol. 17(9), pages 1-13, April.
    2. Lim, Seul-Ye & Min, Seo-Hyeon & Yoo, Seung-Hoon, 2016. "The public value of contaminated soil remediation in Janghang copper smelter of Korea," Resources Policy, Elsevier, vol. 50(C), pages 66-74.
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    Cited by:

    1. Sang Hyeop Park & Jinsung An & Agamemnon Koutsospyros & Deok Hyun Moon, 2023. "Assessment of the Stabilization of Cu-, Pb-, and Zn-Contaminated Fine Soil Using Cockle Shells, Scallop Shells, and Starfish," Agriculture, MDPI, vol. 13(7), pages 1-15, July.
    2. Sang Hyeop Park & Agamemnon Koutsospyros & Deok Hyun Moon, 2022. "Optimization of a High-Pressure Soil Washing System for Emergency Recovery of Heavy Metal-Contaminated Soil," Agriculture, MDPI, vol. 12(12), pages 1-15, November.
    3. Hyunsoo Kim & Oyunbileg Purev & Kanghee Cho & Nagchoul Choi & Jaewon Lee & Seongjin Yoon, 2022. "Removal of Inorganic Salts in Municipal Solid Waste Incineration Fly Ash Using a Washing Ejector and Its Application for CO 2 Capture," IJERPH, MDPI, vol. 19(4), pages 1-15, February.

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