title: Biosorption of Cu2+, Cd2+, Pb2+, and Zn2+ using dried marine green macroalga Caulerpa lentillifera.
abstract: The sorption of Cu2+, Cd2+, Pb2+, and Zn2+ by a dried green macroalga Caulerpa lentillifera was investigated. The removal efficiency increased with pH. The analysis with FT-IR indicated that possible functional groups involved in metal sorption by this alga were O-H bending, N-H bending, N-H stretching, C-N stretching, C-O, SO stretching, and S-O stretching. The sorption of all metal ions rapidly reached equilibrium within 20min. The sorption kinetics of these metals were governed by external mass transfer and intraparticle diffusion processes. The sorption isotherm followed the Langmuir isotherm where the maximum sorption capacities was Pb2+>Cu2+>Cd2+>Zn2+.
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand. prasert.p@chula.ac.th
authors.forename: Prasert
authors.initials: P
authors.lastname: Pavasant
authors.forename: Ronbanchob
authors.initials: R
authors.lastname: Apiratikul
authors.forename: Vimonrat
authors.initials: V
authors.lastname: Sungkhum
authors.forename: Prateep
authors.initials: P
authors.lastname: Suthiparinyanont
authors.forename: Suraphong
authors.initials: S
authors.lastname: Wattanachira
authors.forename: Taha F
authors.initials: TF
authors.lastname: Marhaba
mesh_terms: D000327:Adsorption; D002413:Cations, Divalent; D046068:Caulerpa; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000493:pharmacokinetics*; D010316:Particle Size; D013696:Temperature
chemical_list: D002413:Cations, Divalent; D019216:Metals, Heavy