title: Biosorption of Pb2+ from aqueous solution by waste biomass of aerial roots of Rhizophora mangle (red mangrove).
abstract: The processing waste of the aerial roots of Rhizophora mangle was used in both its unmodified or mercaptoacetic acid (MAA) modified form for the sorption of Pb2+ from aqueous solution. The biomass rapidly and strongly sorbed Pb2+ at pH 5.0, which indicated chemisorption. A significant increase in Pb2+ sorption resulted from MAA treatment of the biomass, indicating that sorption occurs through an ion-exchange process. From sorption-capacity experiments, the unmodified and modified materials extracted, at pH 5, 31.3 and 85.5 mg of Pb2+ per gram of biomass, respectively, from aqueous solutions. Our studies may contribute to an innovative method for the economical and ecologically save removal and recovery of heavy-atom metal ions from contaminated waters through biosorption.
authors.affiliation: Department of Pure & Industrial Chemistry, University of Port Harcourt, P.O. Box 402, Choba, Port Harcourt, Nigeria. horsfalljnr@yahoo.com
authors.forename: Michael
authors.initials: M
authors.lastname: Horsfall
authors.forename: Fred
authors.initials: F
authors.lastname: Ogban
authors.forename: Eyitemi Emmanuel
authors.initials: EE
authors.lastname: Akporhonor
mesh_terms: D000327:Adsorption; D018533:Biomass; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism*; D043982:Rhizophoraceae / Q000737:chemistry / Q000378:metabolism*; D012996:Solutions / Q000737:chemistry; D013696:Temperature; D013864:Thioglycolates / Q000737:chemistry; D013995:Time; D014866:Waste Products / Q000032:analysis*
chemical_list: D012996:Solutions; D013864:Thioglycolates; D014866:Waste Products; D007854:Lead; C017487:2-mercaptoacetate