Biosorption of mercury(II), cadmium(II) and lead(II) ions from aqueous system by microalgae Chlamydomonas reinhardtii immobilized in alginate beads


Bayramoglu G., Tuzun I., Celik G., Yilmaz M., Arica M. Y.

International Journal of Mineral Processing, cilt.81, sa.1, ss.35-43, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 81 Sayı: 1
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.minpro.2006.06.002
  • Dergi Adı: International Journal of Mineral Processing
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.35-43
  • Anahtar Kelimeler: heavy metal, alginate, adsorption, biosorption, adsorption kinetic, microalgae, HEAVY-METALS, ADSORPTION, BIOMASS, REMOVAL, KINETICS, BINDING, COPPER, PH, EQUILIBRIUM, TEMPERATURE
  • Ankara Hacı Bayram Veli Üniversitesi Adresli: Hayır

Özet

The potential use of the immobilized microalgae (in Ca-alginate) of Chlamydomonas reinhardtii to remove Hg(II), Cd(II) and Pb(II) ions from aqueous solutions was evaluated using bare Ca-alginate bead as a control system. Ca-alginate beads containing immobilized microalgae were incubated for the uniform growth at 22 °C for 5 days. Effects of pH, temperature, initial concentration of metal ions and biosorbent dosages on the adsorption of Hg(II), Cd(II) and Pb(II) ions were studied. Adsorption of Hg(II), Cd(II) and Pb(II) ions on the immobilized microalgae showed highest values at around pH 5.0 to 6.0. The adsorption equilibrium was represented with Langmuir and Freundlich adsorption isotherms. The adsorption of these ions on the immobilized microalgae followed second-order kinetics and equilibrium was established in about 60 min. The temperature change in the range of 5-40 °C did not affect the adsorption capacities of the immobilized microalgae. The immobilized-algal systems can be regenerated using 2 M NaCl for Hg(II), Cd(II) and Pb(II) ions. © 2006 Elsevier B.V. All rights reserved.