Water, Air, and Soil Pollution

, Volume 191, Issue 1, pp 305–318

Kinetic and Equilibrium Modeling for Cr(III) and Cr(VI) Removal from Aqueous Solutions by Citrus reticulata Waste Biomass

  • Ammara Zubair
  • Haq Nawaz Bhatti
  • Muhammad Asif Hanif
  • Faiza Shafqat
Article

DOI: 10.1007/s11270-008-9626-y

Cite this article as:
Zubair, A., Bhatti, H.N., Hanif, M.A. et al. Water Air Soil Pollut (2008) 191: 305. doi:10.1007/s11270-008-9626-y
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Abstract

The pulp left after the extraction of juice from Citrus reticulate (kinnow), is a waste material, which was used as a potential sorbent for Cr(III) and Cr(VI) in the present study. The effect of experimental parameters such as pH, biosorbent dosage, biosorbent particle size, initial metal concentrations, temperature, shaking speed and sorption time on the Cr removal is apparent from the obtained results. The Freundlich isotherm and pseudo second order kinetic models fitted well to the data of Cr(III) and Cr(VI) biosorption by Citrus reticulata waste biomass. Effect of several pretreatments such as gases, natural coagulant and many other chemicals on Cr(III) and Cr(VI) sorption capacity of Citrus reticulata waste biomass was first time analyzed in the present study. The metal sorption capacity of Citrus reticulata waste biomass after a specific pretreatment was not only related to the nature of chemical but also strongly dependent on the oxidation state of the metal.

Keywords

Cr (III)Cr(VI)BiosorptionKineticsCitrus reticulataPretreatment

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Ammara Zubair
    • 1
  • Haq Nawaz Bhatti
    • 1
  • Muhammad Asif Hanif
    • 1
    • 2
  • Faiza Shafqat
    • 1
  1. 1.Industrial Biotechnology Laboratory, Department of ChemistryUniversity of AgricultureFaisalabadPakistan
  2. 2.Rose Laboratory, Institute of Horticultural SciencesUniversity of AgricultureFaisalabadPakistan