Immobilization of lead in contaminated firing range soil using biochar

Deok Hyun Moon, Jae Woo Park, Yoon Young Chang, Yong Sik Ok, Sang Soo Lee, Mahtab Ahmad, Agamemnon Koutsospyros, Jeong Hun Park, Kitae Baek

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80 Citations (Scopus)

Abstract

Soybean stover-derived biochar was used to immobilize lead (Pb) in military firing range soil at a mass application rate of 0 to 20 wt.% and a curing period of 7 days. The toxicity characteristic leaching procedure (TCLP) was performed to evaluate the effectiveness of the treatment. The mechanism responsible for Pb immobilization in military firing range soil was evaluated by scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDX) and x-ray absorption fine structure (XAFS) spectroscopy analyses. The treatment results showed that TCLP Pb leachability decreased with increasing biochar content. A reduction of over 90 % in Pb leachability was achieved upon treatment with 20 wt.% soybean stover-derived biochar. SEM-EDX, elemental dot mapping and XAFS results in conjunction with TCLP leachability revealed that effective Pb immobilization was probably associated with the pozzolanic reaction products, chloropyromorphite and Pb-phosphate. The results of this study demonstrated that soybean stover-derived biochar was effective in immobilizing Pb in contaminated firing range soil.

Original languageEnglish
Pages (from-to)8464-8471
Number of pages8
JournalEnvironmental Science and Pollution Research
Volume20
Issue number12
DOIs
Publication statusPublished - 2013 Jul 16
Externally publishedYes

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Keywords

  • Biochar
  • Firing range soil
  • Immobilization
  • Pb
  • Soybean

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Moon, D. H., Park, J. W., Chang, Y. Y., Ok, Y. S., Lee, S. S., Ahmad, M., Koutsospyros, A., Park, J. H., & Baek, K. (2013). Immobilization of lead in contaminated firing range soil using biochar. Environmental Science and Pollution Research, 20(12), 8464-8471. https://doi.org/10.1007/s11356-013-1964-7