title: Biosorption of lead ion by chemically-modified biomass of marine brown algae Laminaria japonica.
abstract: In this paper, marine brown algae Laminaria japonica was chemically-modified by crosslinking with epichlorohydrin (EC(1), EC(2)), or oxidizing by potassium permanganate (PC), or only washed by distilled water (DW). They were used for equilibrium sorption uptake studies with lead. As can be seen from the experimental results that biosorption equilibriums were rapidly established in about 2h. The lead adsorption was strictly pH dependent, and maximum removal of lead on biosorbents were observed at pH 5.3. The effects solid/liquid ratio on lead biosorption was also investigated. The maximum lead uptakes were 1.67 mmol g(-1), 1.62 mmol g(-1), 1.54 mmol g(-1) and 1.21 mmol g(-1), respectively for EC(1), EC(2), PC and DW. The order of maximum lead uptakes for different pretreated and raw alga was EC(1)>EC(2)>PC>DW. A comparison of different isotherm models revealed that the combination of Langmuir and Freundlich (L-F) isotherm model fitted the experimental data best.
authors.affiliation: Institute of Polyoxometalate Chemistry, Department of Chemistry, Northeast Normal University, Changchun 130024, PR China. luof746@nenu.edu.cn
authors.forename: Fang
authors.initials: F
authors.lastname: Luo
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Li
authors.forename: Zhexian
authors.initials: Z
authors.lastname: Xuan
authors.forename: Jiutong
authors.initials: J
authors.lastname: Ma
mesh_terms: D000327:Adsorption; D018533:Biomass; D004811:Epichlorohydrin / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D007795:Laminaria / Q000737:chemistry* / Q000187:drug effects; D007854:Lead / Q000737:chemistry / Q000302:isolation & purification*; D008956:Models, Chemical; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D014874:Water Pollutants, Chemical; D004811:Epichlorohydrin; D007854:Lead