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Removal of Cu(II) with the Recycled Hydroxylapatite from Animal Bones  

Kim, Mu-Nui (Department of Environmental Engineering, Kwandong University)
Kim, Won-Gee (Green Tech.)
Lee, Seung-Mok (Department of Environmental Engineering, Kwandong University)
Yang, Jae-Kyu (Division of General Education, Kwangwoon University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.31, no.9, 2009 , pp. 735-742 More about this Journal
Abstract
The bone of spinal animals has a hydroxylapatite ($Ca_{10}(PO_4)_6(OH)_2$, HAp) structure which is well known as an excellent inorganic ion exchanger for various heavy metal ions in solutions. In this study, the reusability of cow-bone, pig-bone and fish-bone as a potential material for the removal of heavy metals in solutions was evaluated from the removal of Cu(II) ion in batch tests. The surface properties of three bones, calcined at different temperatures, were measured with SEM, XRD, FT-IR analyses. From the SEM analysis, a clear development of heterogeneity as well as pores having small diameter was observed as the calcination temperature increased. The results of X-ray diffraction analysis showed well developed crystallinity on the surface of calcined bones obtained at higher temperatures, suggesting a transform of amorphous type to crystalline type. Fourier transform infrared (FT-IR) analysis showed disappearance of water molecule on the surface of HAp and organic functional groups of the HAp with increasing the calcination temperatures. Cu(II) removal in the control test was below 15%. By the way, additional 40% increase of Cu(II) removal was observed in the presence of calcined bones. For three bones, Cu(II) removal was decreased as the calcined temperature increased. Cu(II) removal was increased as the solution pH increased due to a favorable condition for the cation exchange as well as precipitation.
Keywords
Hydroxylapatite; Bone; Calcination; Copper;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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