Journal
BIORESOURCE TECHNOLOGY
Volume 97, Issue 18, Pages 2321-2329Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2005.10.032
Keywords
sorption; biosorbent; heavy metals; wastewater treatment
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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 0-H bending, N-H bending, N-H stretching, C-N stretching, C-O, S=O stretching, and S-O stretching. The sorption of all metal ions rapidly reached equilibrium within 20 min. 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+. (c) 2005 Elsevier Ltd. All rights reserved.
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