title: Adsorption study of metal ions onto crosslinked seaweed Laminaria japonica.
abstract: 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, 1.53 mol kg(-1), respectively, while 0.8 7 mol kg(-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.
authors.affiliation: Department of Applied Chemistry, Saga University, Honjo 1, Saga 840-8502, Japan.
authors.forename: Kedar Nath
authors.initials: KN
authors.lastname: Ghimire
authors.forename: Katsutoshi
authors.initials: K
authors.lastname: Inoue
authors.forename: Keisuke
authors.initials: K
authors.lastname: Ohto
authors.forename: Takehiro
authors.initials: T
authors.lastname: Hayashida
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry; D003432:Cross-Linking Reagents / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007795:Laminaria / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry* / Q000493:pharmacokinetics*; D012624:Seaweed / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D000464:Alginates; D003432:Cross-Linking Reagents; D006603:Hexuronic Acids; D007477:Ions; D019216:Metals, Heavy; D014867:Water; D020723:Glucuronic Acid