The Effects of Marine Sediments and NaCl as Impurities on the Calcination of Oyster Shells

굴패각 소성시 해저 퇴적물과 NaCl 불순물이 소성 특성에 미치는 영향

  • Ha, Su Hyeon (School of Earth System Sciences, Kyungpook National University) ;
  • Kim, Kangjoo (Department of Environmental Engineering, Kunsan National University) ;
  • Kim, Seok-Hwi (Center for Plant Engineering, Institute for Advanced Engineering) ;
  • Kim, Yeongkyoo (School of Earth System Sciences, Kyungpook National University)
  • 하수현 (경북대학교 지구시스템과학부) ;
  • 김강주 (군산대학교 환경공학과) ;
  • 김석휘 (고등기술연구원, 플랜트 엔지니어링 센터) ;
  • 김영규 (경북대학교 지구시스템과학부)
  • Received : 2019.05.31
  • Accepted : 2019.06.19
  • Published : 2019.06.28


The calcination of oyster shells have been studied as the possible substitute for the limestone used as an absorbent of $SO_2$ gas. However, since pure shells can not be used in calcination process, some impurities are contained and the changes in the characteristics of the calcination products are expected. In this study, the surface characteristics of the calcination products are investigated by mineralogical analysis according to the contents of NaCl, which can be derived from sea water, and sediments on the surface of the shell as impurities. The marine sediments on the shells were mainly composed of quartz, albite, calcite, small amounts of amphibole and clay minerals such as ilite, chlorite and smectite. After calcination of oyster shells mixed with 0.2-4.0 wt% sediments at $900^{\circ}C$ for 2 hours, regardless of the dehydration, dehydroxylation, and phase change of these minerals at the lower temperature than this experiment, no noticeable changes were observed on the specific surface area of the calcined product. However, when mixed with 0.1 to 2.0 wt% NaCl, the specific surface area generally increases as compared with the shell sample before calcination. The specific surface area increases with increasing amount of salt, and then decreases again. This is closely related to the changes of surface morphology. As the amount of NaCl increases, the morphology of the surface is similar to that of gel. It changes into a slightly angular, smaller particle and again looks like gel with increasing amount of NaCl. Our results show that NaCl affects morphological changes probably caused by melting of some oyster shells, but may have different effects on the specific surface area of calcination product depending on the NaCl contents.


oyeter shell;calcination;impurity;sediment;NaCl

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Fig. 1. XRD patterns of oyster shell and marine sediment collected from oyster shells before and after calcination (Ab: albite, Am: amphibole, C: calcite, Ch: chlorite, I:illite, K: kaolinite, Q: quartz, S: smectite).

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Fig. 2. SEM images of calcined pure Taean oyster shell powder. (a) 3000×, (b) 15000×.

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Fig. 3. SEM images of calcined Taean oyster shell powder containing sediment (a) 0.2 wt% (3000×), (b) 0.6 wt% (900×), (c) 1.4 wt% (3500×), (d) 2.4 wt% (2000×), (e) 4.0 wt% (3000×), (f) 4.0 wt% (1000×).

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Fig. 4. SEM images of calcined Taean oyster shell powder containing NaCl (3000×) (a), (b) 0.1 wt%, (c) 0.3 wt%, (d), (e) 0.7 wt%, (f) 1.2 wt%, (g), (h) 2.0 wt%.

Table 1. Chemical composition of sediment used in this experiment (wt%)

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Table 2. BET surface areas of Taean oyster shells containing sediment and NaCl salt (m2/g)

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Supported by : 한국연구재단


  1. Alidoust, D., Kawahigashi, M., Yoshizawa, S., Sumida, H. and Watanabe, M. (2015) Mechanism of cadmium biosorption from aqueous solutions using calcined oyster shells. J. Environ. Manage., v.150, p.103-110.
  2. Araujo, H., da Silva, N.F., Acchar, W. and Gomes, U.U. (2004) Thermal decomposition of illite. Mater. Res., v.7, p.359-361.
  3. Brindley, G.W. and Ali, S.Z. (1950) X-ray study of thermal transformations in some mgnesium chlorite minerals. Acta. Chrystallogr., v.3, p.25-30.
  4. Cao X, Dermatas D, X.X. and Shen, G. (2008) Immobilization of lead in shooting range soils by means of cement, quicklime, and phosphate amendments. Environ. Sci. Pollut. R., v.15, p.120-127.
  5. Castilho, S., Kiennemann, A., Pereira, M.F.C. and Dias, A.P.S. (2013) Sorbent for $CO_2$ capture from biogenesis calcium wastes. Chem. Eng. J., v.226, p.146-153.
  6. Chen, J., Yao, H. and Zhang, L. (2012) A study on the calcination and sulphation behaviour of limestone during oxy-fuel combustion. Fuel, v.102, p.386-395.
  7. de Diego, L.F., de las Obras-Loscertales, M., Garcia-Labiano, F., Rufas, A., Abad, A., Gayan, P. and Adanez, J. (2011) Chracterization of a limestone in a batch fluidized bed reactor for sulfur retention under oxyfuel operating conditions. Int. J. Greenh. Gas. Con., v.5, p.1190-1198.
  8. Garcia-Labiano, F., Rufas, A., de Diego, L.F., de las Obras-Loscertales, M., Gayan P., Abad, A. and Adanez, J. (2011) Calcium-based sorbents behaviour during sulphation at oxy-fuel fluidised bed combustion conditions. Fuel, v.90, p.3100-3108.
  9. Ha, S.H., Cha, M.K., Kim, K., Kim, S.H. and Kim, Y. (2017) Mineralogical and chemical characteristics of the oyster shells from Korea. J. Miner. Soc. Korea, v.30, p.149-159.
  10. Hur, Y.B., Min, K.S., Kim, T.E., Lee, S.J. and Hur, S.B. (2008) Larvae growth and biochemical composition change of the Pacific oyster, Crassostrea gigas, larvae during artificial seed production. J. Aquaculture, v.21, p.203-212.
  11. Kouzu, M., Kajita, A. and Fujimori, A. (2016) Catalytic activity of calcined scallop shell for rapeseed oil transesterification to produce biodiesel. Fuel, v.182, p.220-226.
  12. Lim, H.J., Back, S.H., Lim, M.S., Choi, E.H. and Kim, S.K. (2012) Regional variations in Pacific oyster, Crassostrea gigas, growth and the number of larvae occurrence and spat settlement along the west coast, Korea. Korean J. Malacol., 28, 259-267.
  13. Laursen, K., Grace, J.R., and Lim, C.J. (2001) Enhancement of the sulfur capture capacity of limestones by the addition of $Na_2CO_3$ and NaCl. Environ. Sci. Technol., v.35, p.4384-4389.
  14. Lee, J.W., Choi, S.H., Kim, S.H., Cha, W.S., Kim, K. and Moon, B.K. (2018) Mineralogical changes of oyster shells by calcination: A comparative study with limestone. Econ. Environ. Geol., v.51, p.485-492.
  15. Ma, K.W. and Teng, H. (2009) CaO powders from oyster shells for efficient $CO_2$ capture in multiple carbonation cycles. J. Am. Ceram. Soc., v.93, p.221-227.
  16. Malek, Z., Balek, V., Garfinkel-Shweky, D. and Yariv, S. (1997) The study of the dehydration and dehydroxylation of smectites by emanation thermal analysis. J. Therm. Analysis, v.48, p.83-92.
  17. Moon, D.H., Kim, K.W., Yoon, I.H., Grubb, D.G., Shin, D.Y., Cheong, K.H., Choi, H.I., Ok, Y.S. and Park, J.H. (2011) Stabilization of arsenic-contaminated mine tailings using natural and calcined oyster shells. Environ. Earth Sci., v.64, p.597-605.
  18. Mymrin, V.A., Alekseev, K.P., Catai, R.E., Izzo, R.L.S., Rose, J.L., Nagalli, A. and Romano, C.A. (2015) Construction material from construction and demolition debris and lime production wastes. Const. Build. Mater., v.79, p.207-213.
  19. Ok, Y.S., Oh, S.E., Ahmad, M., Hyun, S., Kim, K.R., Moon, D.H., Lee, S.S., Lim, K.J., Jeon, W.T. and Yang, J.E. (2010) Effects of natural and calcined oyster shells on Cd and Pb immobilization in contaminated soils. Environ. Earth Sci., v.61, p.1301-1308.
  20. Salvador, C., Lu, D., Anthony, E.J. and Abanades, J.C. (2003) Enhancement of CaO for CO2 capture in an FBC environment. Chem. Eng. J., v.96, p.197-195.
  21. Scala, F., Chirone, R., Meoni, P., Carcangju, G., Manca, M., Mulas, G. and Mulas, A. (2013) Fluidized bed desulfurization using lime obtained after slow calcination of limestone particles. Fuel, v.114, p99-105.
  22. Shearer, J.A., Johnson, I. and Turner, C.B. (1979) Effects of sodium chloride on limestone calcunation and sulfation in fluidized-bed combustion. Environ. Sci. Techn., v.13, p.1113-1118.
  23. Seki, Y. and Kenedy, G.C. (1964) The breakdown of potassium feldspar, KAlSi3O8 at high temperatures and high pressures. Am. Mineral., v.49, p.1688-1706.
  24. Stanmore, B.R. and Gilot, P. (2005) Review-calcination and carbonation of limestone during thermal cycling for $CO_2$ sequestration. Fuel. Process Technol., v.86, p.1707-1743.
  25. Roy, R., Roy, D.M. and Francis, E.E. (1955) New data on thermal dexomposition of kaolinite and halloysite. J. Am. Ceram. Soc., v.38, p.198-205.
  26. Wang, H., Li, C., Peng, Z. and Zhang, S. (2011) Characterization and thermal behavior of kaolin. J. Them. Anal. Calorim., v.105, p.157-160.
  27. Yen, H.Y. and Li, J.Y. (2015) Process optimization for Ni(II) removal from wastewater by calcined oyster shell powders using Taguchi method. J. Environ. Manage., v.161, p.344-349.
  28. Yeskis, D., van Groos, A.F.K. and Guggenheim, S. (1985) The dhydroxylation of kaolinite. Am. Mineral., v.70, p.159-164.