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Stabilization/Solidification of Heavy Metals and PHe Contaminated Soil with β-Cyclodextrin Modified Biochar (β-CD-BC) and Portland Cement

Author

Listed:
  • Geng Li

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

  • Haibo Li

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

  • Yinghua Li

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

  • Xi Chen

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

  • Xinjing Li

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

  • Lixin Wang

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

  • Wenxin Zhang

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

  • Ying Zhou

    (School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China)

Abstract

Conventional stabilization/solidification materials have defects in the simultaneous treatment of heavy metals (HMs) and phenanthrene (PHe). In order to solve this problem, a new functional material β-cyclodextrin modified biochar (β-CD-BC) was prepared by integrating the properties of biochar (BC) and the hydrophilic and hydrophobic properties of the β-CD surface and combined with Portland cement (PC) to cure and stabilize HMs and PHe. The effect of key parameters on the treatment effect was discussed by response surface method. The results showed that the minimum leaching concentration if HMs was 16.81 mg·L −1 , and the leaching concentration of PHe can be as low as 0.059 μg/kg under the conditions of β-CD-BC and Portland cement ratio of 9.75% and 11.4%, curing for 22.85 d. The weak acid soluble state reduced from 9~13% to 0.5~6%, the residual state was increased from 37~61% to 77~87%. The unconfined compressive strength of sample is more than 50 kPa. The results of this study can provide a new technical scheme for long-term curing and stabilization of HMs and PHe.

Suggested Citation

  • Geng Li & Haibo Li & Yinghua Li & Xi Chen & Xinjing Li & Lixin Wang & Wenxin Zhang & Ying Zhou, 2022. "Stabilization/Solidification of Heavy Metals and PHe Contaminated Soil with β-Cyclodextrin Modified Biochar (β-CD-BC) and Portland Cement," IJERPH, MDPI, vol. 19(3), pages 1-18, January.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:3:p:1060-:d:727741
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    References listed on IDEAS

    as
    1. 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.
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    Cited by:

    1. Liping Li & Lanfang Han & Aiju Liu & Fayuan Wang, 2022. "Imperfect but Hopeful: New Advances in Soil Pollution and Remediation," IJERPH, MDPI, vol. 19(16), pages 1-3, August.

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