Effects of natural and calcined oyster shells on Cd and Pb immobilization in contaminated soils

  • Yong Sik Ok
  • , Sang Eun Oh
  • , Mahtab Ahmad
  • , Seunghun Hyun
  • , Kwon Rae Kim
  • , Deok Hyun Moon
  • , Sang Soo Lee
  • , Kyoung Jae Lim
  • , Weon Tai Jeon
  • , Jae E. Yang

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In Korea, soils adjacent to abandoned mines are commonly contaminated by heavy metals present in mine tailings. Further, the disposal of oyster shell waste by oyster farm industries has been associated with serious environmental problems. In this study, we attempted to remediate cadmium (Cd)- and lead (Pb)-contaminated soils typical of those commonly found adjacent to abandoned mines using oyster shell waste as a soil stabilizer. Natural oyster shell powder (NOSP) and calcined oyster shell powder (COSP) were applied as soil amendments to immobilize Cd and Pb. The primary components of NOSP and COSP are calcium carbonate (CaCO3) and calcium oxide (CaO), respectively. X-ray diffraction, X-ray fluorescence and scanning electron microscope analyses conducted in this study revealed that the calcination of NOSP at 770°C converted the less reactive CaCO3 to the more reactive CaO. The calcination process also decreased the sodium content in COSP, indicating that it was advantageous to use COSP as a liming material in agricultural soil. After 30 days of incubation, we found that the 0.1 N HCl extractable Cd and Pb contents in soil decreased significantly as a result of an increase in the soil pH and the formation of metal hydroxides. COSP was more effective in immobilizing Cd and Pb in the contaminated soil than NOSP. Overall, the results of this study suggest that oyster shell waste can be recycled into an effective soil ameliorant.

    Original languageEnglish
    Pages (from-to)1301-1308
    Number of pages8
    JournalEnvironmental Earth Sciences
    Volume61
    Issue number6
    DOIs
    Publication statusPublished - 2010

    Bibliographical note

    Funding Information:
    Acknowledgments This study was supported by the National Research Foundation of Korea Grant funded by the Korean Government (Project number: 2009-0071439). Instrumental analysis was supported by a grant from the Institute of Environmental Research, the Research Institute of Agricultural Science, and the Central Laboratory of Kangwon National University, Korea. The authors also thank Jung Eun Lim for conducting incubation experiments.

    UN SDGs

    This output contributes to the following UN Sustainable Development Goals (SDGs)

    1. SDG 12 - Responsible Consumption and Production
      SDG 12 Responsible Consumption and Production

    Keywords

    • Cadmium
    • Lead
    • Oyster shell
    • Soil quality
    • Stabilization
    • Waste recycling
    • pH

    ASJC Scopus subject areas

    • Global and Planetary Change
    • Environmental Chemistry
    • Water Science and Technology
    • Soil Science
    • Pollution
    • Geology
    • Earth-Surface Processes

    Fingerprint

    Dive into the research topics of 'Effects of natural and calcined oyster shells on Cd and Pb immobilization in contaminated soils'. Together they form a unique fingerprint.

    Cite this