Korean Journal of Chemical Engineering

, Volume 29, Issue 1, pp 64–71

Biosorption of chromium onto Erythrina Variegata Orientalis leaf powder

  • Gannavarapu Venkata Vamsi Aditya
  • Bhagavatula Padma Pujitha
  • Nalluri Chitti Babu
  • Paladugu Venkateswarlu
Environmental Engineering

DOI: 10.1007/s11814-011-0139-9

Cite this article as:
Aditya, G.V.V., Pujitha, B.P., Babu, N.C. et al. Korean J. Chem. Eng. (2012) 29: 64. doi:10.1007/s11814-011-0139-9

Abstract

The biosorption of chromium from an aqueous solution onto Erythrina Variegata Orientalis leaf powder was investigated in batch operations. The equilibrium agitation time was 180 min. The extent of chromium biosorption increased from 74.2% to 86.4% with decrease in biosorbent size from 150 to 45 μm for a dosage of 30 g/L. The biosorption decreased from 99.1 (0.45 mg/g) to 45.5% (1.64 mg/g) with an increase in chromium initial concentration (Co) from 22.5 to 180 mg/L. The extent of biosorption was maximum at pH=3. The experimental data were well explained by Langmuir and Redlich-Peterson isotherm models. The biosorption data followed second-order kinetics with a rate constant of 0.078 g/mg-min for 50 g/L of 45 μm size biosorbent. The biosorption was exothermic and feasible. The biosorption was tending towards irreversibility with increasing temperature.

Key words

ChromiumBiosorptionErythrinaThermodynamics

Copyright information

© Korean Institute of Chemical Engineers, Seoul, Korea 2011

Authors and Affiliations

  • Gannavarapu Venkata Vamsi Aditya
    • 1
  • Bhagavatula Padma Pujitha
    • 1
  • Nalluri Chitti Babu
    • 1
  • Paladugu Venkateswarlu
    • 2
  1. 1.Department of Chemical EngineeringAndhra UniversityVisakhapatnamIndia
  2. 2.PVP Siddhartha Institute of TechnologyVijayawadaIndia