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Article

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

School of Resources and Civil Engineering, Northeastern University, 3-11 Wenhua Road, Heping District, Shenyang 110819, China
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Academic Editors: Fayuan Wang, Liping Li, Lanfang Han and Aiju Liu
Int. J. Environ. Res. Public Health 2022, 19(3), 1060; https://doi.org/10.3390/ijerph19031060
Received: 19 November 2021 / Revised: 6 January 2022 / Accepted: 9 January 2022 / Published: 18 January 2022
(This article belongs to the Special Issue New Advances in Soil Pollution and Remediation)
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. View Full-Text
Keywords: β-CD modified BC; stabilization/solidification; response surface methodology; synchronous adsorption investigations; PHe β-CD modified BC; stabilization/solidification; response surface methodology; synchronous adsorption investigations; PHe
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MDPI and ACS Style

Li, G.; Li, H.; Li, Y.; Chen, X.; Li, X.; Wang, L.; Zhang, W.; Zhou, Y. Stabilization/Solidification of Heavy Metals and PHe Contaminated Soil with β-Cyclodextrin Modified Biochar (β-CD-BC) and Portland Cement. Int. J. Environ. Res. Public Health 2022, 19, 1060. https://doi.org/10.3390/ijerph19031060

AMA Style

Li G, Li H, Li Y, Chen X, Li X, Wang L, Zhang W, Zhou Y. Stabilization/Solidification of Heavy Metals and PHe Contaminated Soil with β-Cyclodextrin Modified Biochar (β-CD-BC) and Portland Cement. International Journal of Environmental Research and Public Health. 2022; 19(3):1060. https://doi.org/10.3390/ijerph19031060

Chicago/Turabian Style

Li, Geng, Haibo Li, Yinghua Li, Xi Chen, Xinjing Li, Lixin Wang, Wenxin Zhang, and Ying Zhou. 2022. "Stabilization/Solidification of Heavy Metals and PHe Contaminated Soil with β-Cyclodextrin Modified Biochar (β-CD-BC) and Portland Cement" International Journal of Environmental Research and Public Health 19, no. 3: 1060. https://doi.org/10.3390/ijerph19031060

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