Modelling of a single-staged bioseparation process for simultaneous removal of iron(III) and chromium(VI) by using Chlorella vulgaris

Aksu Z., Acikel U.

BIOCHEMICAL ENGINEERING JOURNAL, vol.4, no.3, pp.229-238, 2000 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 4 Issue: 3
  • Publication Date: 2000
  • Doi Number: 10.1016/s1369-703x(99)00053-4
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.229-238
  • Hacettepe University Affiliated: No


In this study, the competitive biosorption of iron(III) and chromium(VI) to Chlorella vulgaris from a binary metal mixture was investigated in a single-staged batch reactor as a function of V-0/X-0 (volume of solution containing heavy metal mixture/quantity of biosorbent) ratio and second metal ion concentration at pH 2. The obtained results showed that the increase in biomass quantity (or the decrease of V-0/X-0 ratio) with the addition of second metal ion affected the removed quantities of iron(III) or chromium(VI). The sorption phenomenon was expressed by the competitive, multi-component Langmuir adsorption isotherm and this expression was used for calculating each residual or adsorbed metal ion concentration at equilibrium (C-eq,C-i or C-ad,C-eq,C-i) at a constant V0X0 ratio for a given combination of heavy metal ions in a single-staged batch reactor. Experimental C-eq,C-i and C-ad,C-eq,C-i values were compared to those calculated and graphically determined. (C) 2000 Elsevier Science S.A. All rights reserved.