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 journalArticle

97 Citations (Scopus)

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 Aug 9

Fingerprint

shell (molluscs)
Cadmium
polluted soils
Powders
immobilization
cadmium
shell
Soils
powders
Abandoned mines
calcium oxide
Lime
Calcination
abandoned mine
Hydroxides
soil
lime
contaminated soil
effect
Calcium Carbonate

Keywords

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

ASJC Scopus subject areas

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

Cite this

Effects of natural and calcined oyster shells on Cd and Pb immobilization in contaminated soils. / Ok, Yong Sik; Oh, Sang Eun; Ahmad, Mahtab; Hyun, Seunghun; Kim, Kwon Rae; Moon, Deok Hyun; Lee, Sang Soo; Lim, Kyoung Jae; Jeon, Weon Tai; Yang, Jae E.

In: Environmental Earth Sciences, Vol. 61, No. 6, 09.08.2010, p. 1301-1308.

Research output: Contribution to journalArticle

Ok, YS, Oh, SE, Ahmad, M, Hyun, S, Kim, KR, Moon, DH, Lee, SS, Lim, KJ, Jeon, WT & Yang, JE 2010, 'Effects of natural and calcined oyster shells on Cd and Pb immobilization in contaminated soils', Environmental Earth Sciences, vol. 61, no. 6, pp. 1301-1308. https://doi.org/10.1007/s12665-010-0674-4
Ok, Yong Sik ; Oh, Sang Eun ; Ahmad, Mahtab ; Hyun, Seunghun ; Kim, Kwon Rae ; Moon, Deok Hyun ; Lee, Sang Soo ; Lim, Kyoung Jae ; Jeon, Weon Tai ; Yang, Jae E. / Effects of natural and calcined oyster shells on Cd and Pb immobilization in contaminated soils. In: Environmental Earth Sciences. 2010 ; Vol. 61, No. 6. pp. 1301-1308.
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AB - 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.

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