Removal of Cd(II) and Pb(II) from aqueous solution using dried water hyacinth as a biosorbent

Ibrahim H. S., Ammar N. S., SOYLAK M., Ibrahim M.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, vol.96, pp.413-420, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 96
  • Publication Date: 2012
  • Doi Number: 10.1016/j.saa.2012.05.039
  • Journal Name: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.413-420
  • Keywords: Molecular modeling, FTIR, Water hyacinth, Metals and kinetic models, HEAVY-METAL, WASTE-WATER, ADSORPTION, SORPTION, BIOSORPTION, CADMIUM, BIOMASS, IONS, LEAD, EQUILIBRIUM
  • Erciyes University Affiliated: Yes

Abstract

Possible usages of dried water hyacinth as biosorbent for metal ions were investigated. A model describing the plant is presented on density functional theory DFT and verified experimentally with FTIR. The model shows that water hyacinth is a mixture of cellulose and lignin. Dried shoot and root were found as good sorbent for Cd(II) and Pb(II) at optimum dosage of 5.0 g/l and pH 5.0; equilibrium time was attained within 30-60 min. The removal using root and shoot were nearly equal and reached more than 75% for Cd and more than 90% for Pb. Finally the second-order kinetics was the applicable model. Hydrogen bonds of reactive functional groups like COOH play the key role in the removal process. (C) 2012 Elsevier B.V. All rights reserved.