Biosorption of Cu2+, Cd2+, Pb2+, and Zn2+ using dried marine green macroalga Caulerpa lentillifera

Prasert Pavasant, Ronbanchob Apiratikul, Vimonrat Sungkhum, Prateep Suthiparinyanont, Suraphong Wattanachira, Taha F. Marhaba

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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 O-H bending, N-H bending, N-H stretching, C-N stretching, C-O, S{double bond, long}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+.

Original languageEnglish (US)
Pages (from-to)2321-2329
Number of pages9
JournalBioresource Technology
Issue number18
StatePublished - Dec 2006

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal


  • Biosorbent
  • Heavy metals
  • Sorption
  • Wastewater treatment


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