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Adsorption study of metal ions onto crosslinked seaweed Laminaria japonica

Kedar Nath KN Ghimire, Katsutoshi K Inoue, Keisuke K Ohto, and Takehiro T Hayashida

Bioresour Technol 99(1):6 (2008) PMID 17267212

An efficient and cost effective non-conventional adsorbent has been prepared from seaweed Laminaria japonica by crosslinking with epichlorohydrin. Its adsorption behavior for trivalent and divalent metal ions was studied and it was found to exhibit excellent selectivity towards several metal ions. As a typical example, binary mixture of Pb(II) and Zn(II) was studied by using a packed column, indicating that the Pb(II) ion can be easily separated from its mixture with a concentration factor of 74 times. The maximum adsorption capacity for Pb(II), Cd(II), Fe(III) was found to be 1.35, 1.1, 1.53molkg^-^1, respectively, while 0.87molkg^-^1 for both La(III) and Ce(III) from the single metal ion solution according to the adsorption isotherm. The obtained values are comparable to the commercially available synthetic chelating resins.

DOI: 10.1016/j.biortech.2006.11.057
Version: za2963e q8zae q8zb6 q8zc4 q8zd8 q8zec q8zf3 q8zga

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