Production of Concentrated Magnesium Solution from Seawater Using Industrial By-products

산업부산물을 이용한 해수로부터 고농도 마그네슘 용액의 제조

Cho, Taeyeon;Kim, Myoung-Jin

  • Received : 2016.04.27
  • Accepted : 2016.06.09
  • Published : 2016.06.30


With the purpose of concentrating the magnesium from seawater, in this study, we have conducted experiments to precipitate the magnesium using three precipitants (NaOH, cement kiln dust, and paper sludge ash), and then extract it using sulfuric acid. Results show that the precipitation and extraction performance does not depend so significantly on the kind of precipitant: for all the precipitants used, the precipitation efficiency is measured almost 100% and the extraction efficiency is in the short range of 77 - 89%. The magnesium concentration in the extract is measured 4975 - 5775 mg/L, implying that the magnesium in seawater should be 3.8 - 4.4 times concentrated through the precipitation and extraction reactions. The reaction efficiency of the industrial by-product used as a precipitant in this study is almost 100% similar to those of the other existing expensive precipitants.


Mg;seawater;recovery;industrial by-product;cement kiln dust;paper sludge ash


  1. Shim, J.D., Lee, D.H., 2011 : Microstructure Control, Forming Technologies of Mg alloys and Mg Scrap Recycling, Journal of Korean Institute of Resources Recycling, 20(1), pp. 69-79.
  2. Park, H.G., Kang, M.C., 2011 : Current Status on the Domestic Recycling of Magnesium, Journal of Korean Institute of Resources Recycling, 20(3), pp. 3-11.
  3. Elsner, D., Rothon, R., 1998 : Magnesium process. U.S. Patent : 5,843,389
  4. Ozedmir, M., Cakir, D., Kipcak, I., 2009 : Magnesium recovery from magnesite tailings by acid leaching and production of magnesium chloride hexahydrate from leaching solution by evaporation, International Journal of Mineral Processing, 93(2), pp. 209-212.
  5. Ju, C.S., Lee,K.O., Jeong, S.W., Park, H.J., Na, S.E., Jeong, K.S., 2001 : A study on the Separation and Recovery of Magnesium from Waste Bittern, Journal of the Korean Environmental Sciences Society, 10(5), pp. 381-386.
  6. Henrist, C., Mathieu, J.-P., Vogels, C., Rulmont, A., Cloots, R., 2003 : Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution, Journal of Crystal Growth 249, pp. 321-330.
  7. Lee, S.W., Lim, J.H., 2007 : Recovery of magnesium oxide and magnesium hydroxide from the waste bittern, Advanced Materials Research, 26(28), pp. 1019-1022.
  8. Lehmann, O., Nir, O., Kuflik, M., Lahav, O., 2014 : Recovery of high-purity magnesium solutions from RO brines by adsorption of $Mg(OH)_2(s)$ on $Fe_3O_4$ micro-particles and magnetic solids separation, Chemical Engineering Journal, 235, pp. 37-45.
  9. Lee, J.M., W.C. Bauman., 1980 : Recover of $Mg^{+\;+}$ from brines. U.S. Patent : 4,183,900
  10. Khamizov, R.K., Muraviev, D., Tikhonov, N. A., Krachak, A. N., Zhiguleva, T. I., Fokina, O. V., 1998 : Clean Ion-Exchange Technologies. 2. Recovery of High-Purity Magnesium Compounds from Seawater by an Ion-Exchange Isothermal Supersaturation Technique, Industrial & Engineering Chemistry Research, 37(6), pp. 2496-2501.
  11. Muraviev, D., J. Noguerol., M. Valiente., 1996 : Separation and concentration of calcium and magnesium from sea water by carboxylic resins with temperature-induced selectivity, Reactive and Functional Polymers, 28(2), pp. 111-126.
  12. Grinstead, R,R., Davis, J,C., 1970 : Extraction by phase separation with mixed lonic solvents. recovery of magnesium chloride from sea water concentrates, Industrial & Engineering Chemistry Product Research and Development, 9(1)
  13. Anil, K., Syamal, R., 1974 : Solvent extraction behavior of magnesium and calcium in versatic acid-amine systems, Separation Science and Technology, 9(3), pp. 261-268.
  14. Atashi, H., Sarkari, M., Zeinali, M., Aliabadi, H.Z., 2010 : Recovery of < agnesium Chloride from Resulting Potash Unit Concentrate Case Study: Iran Great Desert brine, Australian Journal of Basic and Applied Sciences, 4(10), pp. 4766-4771.
  15. Tran, K.T., Luong, T.V., An, J.W., Kang, D.J., Kim, M.J., Tran, T., 2013 : Recovery of magnesium from Uyuni salar brine as high purity magnesium oxalate, Hydrometallurgy, 138, pp. 93-99.
  16. Baird, T., Braterman, P., Cochrane, H., 1988 : Magnesium hydroxide precipitation as studied by hel growth methods, Journal of Crystal Growth, 91(4), pp. 610-616.
  17. Alamdari, A., Rahimpour, M.R., Esfandiari, N., Nourafkan, E., 2008 : Kinetics of magnesium hydroxide precipitation from sea bittern, Chemical Engineering and Processing, 47, pp. 215-221.
  18. Kang, D.H., Abu, A., Heo, S.J., Oh, C.H., Park, H.S., 2012 : Method for manufacturing concentrated magnesium from natural seawater, Patent : 10-1115372.
  19. Lee, M.H., Choi, S.I., Lee, J.Y., Lee, G.G., Park, J.U., 2011 : Soil and Groundwater Environment, DongHwa Technology Publishing Co.
  20. Leggett, C.J., Rao, L., 2015 : Complexation of calcium and magnesium with glutarimidedioxime: Implications for the extraction of uranium from seawater, Polyhedron, 95, pp. 54-59.
  21. Haynes, W.M., Lide, D.R., 2010 : CRC Handbook of Chemistry and Physics 91th Edition (2010-2011), CRC Press.

Cited by

  1. Precipitation of Magnesium Sulfate from Concentrated Magnesium Solution for Recovery of Magnesium in Seawater vol.25, pp.4, 2016,