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| Case Study of Ex-situ Solidification/Stabilization Technique for Remediation of Heavy Metal Contaminated Soil |
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Received:April 19, 2023
Revised:May 22, 2023
Accepted:May 23, 2023
Published Online:July 10, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.08.018 |
| KeyWord:heavy metal pollution; soil; solidification/stabilization; ex-situ remediation |
| Author | Institution |
| ZHU Fang-xu |
核工业二七0研究所 |
| CHENG Shao-juan |
核工业二七0研究所 |
| XIONG Zhen-yu |
核工业二七0研究所 |
| LIU Jiang-hao |
核工业二七0研究所 |
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| Abstract: |
| The ex-situ solidification/stabilization technique was used to repair heavy metal contaminated soil in abandoned land of an industrial park. The specific process was "waste residue/soil + cement + lime + stabilizer (ferric chloride)". The remediation process for contaminated soil is as follows: demolish and repair the hardened ground of the land parcel; Clean and excavate contaminated soil, transfer it to the remaining workshop within the plot for temporary storage and repair, and conduct solidification/stabilization treatment in batches; Transport the treated soil that meets the standards for industrial land or subgrade through maintenance, testing, and other means. The maximum detection pH value in leachates of the restored soil sampless is 8.56, and the maximum concentration detection values of Cu, Pb, Zn, Cd, As, Ni, Be, Sb and Co in the soil samples leachates after remediation are 0.004 4, 0.009 0, 0.998 9, 0.003 4, 0.032 0, 0.005 2, 0.000 4, 0.009 0, 0.020 9 mg/L, respectively, meeting the remediation standard limits of these 9 heavy metals. |
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