Huang, Y.; Gao, R.; Sun, J.; Zhang, S.; Jia, Z.; Yang, F.; Yao, J.; Song, X. Experimental Study on Remediation of Lead-contaminated Soil With Citric Acid as Cleaning Agent. Preprints2023, 2023091719. https://doi.org/10.20944/preprints202309.1719.v1
APA Style
Huang, Y., Gao, R., Sun, J., Zhang, S., Jia, Z., Yang, F., Yao, J., & Song, X. (2023). Experimental Study on Remediation of Lead-contaminated Soil With Citric Acid as Cleaning Agent. Preprints. https://doi.org/10.20944/preprints202309.1719.v1
Chicago/Turabian Style
Huang, Y., Jia Yao and Xiangyu Song. 2023 "Experimental Study on Remediation of Lead-contaminated Soil With Citric Acid as Cleaning Agent" Preprints. https://doi.org/10.20944/preprints202309.1719.v1
Abstract
Soil washing is a rapid and efficient method for heavy metals removal. In this study, in order to prove the feasibility of leaching remediation technology for remediation of lead-contaminated soil around a smelter, intermittent oscillating washing tests and extensive continuous tests were conducted to remediate Pb contaminated soils. Plant growth tests with wheat (Bainong Aikang 58) were also conducted to investigate the effects of leaching on plant growth and the Pb content of stems and leaves. The results revealed that in soils, Pb mainly exists in the forms of PbCO3, Pb5(PO4)3Cl2, PbSO4, and in small amounts of PbS. The intermittent oscillating washing tests showed that a lower liquidsolid(L/S) ratio and a higher leaching temperature and time were related to increased Pb removal efficiency. The Pb removal efficiency rates in the oscillating washing tests and the extensive continuous tests were 72.50% and 69.94%, respectively. In addition, the chemical and physical characteristics of the soil were basically unchanged after the leaching regimes. The results of the plant growth tests showed that the leaching regimes did not have a negative effect on the survival rate and growth of the wheat, and the heavy metal contents of the stem and leaf were effectively reduced. This study provides a reference for the large-scale remediation of contaminated soils.
Keywords
Pb contaminated soils; repair; soil washing; intermittent and continuous experiments
Subject
Environmental and Earth Sciences, Environmental Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
