JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editor in Chief
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
Read Journal
    Current Issue
    Journal Archives
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status
    JEB Awards

Google Search the Journal web-site:

    Abstract - Issue Oct 2007, 28 (4)                                     Back


Cr (VI) and Fe (III) removal using Cajanus cajan husk

N. Ahalya1, R.D. Kanamadi2 and T.V. Ramachandra*1


1Energy and Wetlands Research Group, Centre for Ecological Sciences

Indian Institute of Science, Bangalore-560 012, India

2Department of Zoology, Karnataka University, Dharwad-580 005, India

(Received: October 01, 2005 ; Revised received: March 15, 2006 ; Accepted: April 28, 2006)

Abstract: Husk of tur dal (Cajanus cajan) was investigated as a new biosorbent for the removal of Fe (III) and Cr (VI) ions from aqueous solutions. Parameters like agitation time, adsorbent dosage and pH were studied at different initial Fe (III) and Cr (VI) concentrations. The biosorptive capacity of the Tur dal husk was dependent on the pH of the chromium and ironsolution, with pH 2 and 2.5 respectively being optimal.The adsorption data fit well with Langmuir and Freundlich isotherm models. The practical limiting adsorption capacity (qmax) calculated from the Langmuir isotherm was 96.05 mg of Cr(VI)/g of the biosorbent at an initial pH of 2.0 and 66.65 mg/g at pH 2.5 . The infrared spectra of the biomass revealed that hydroxyl, carboxyl and amide bonds are involved in the uptake of Cr (VI) and Fe (III) ions. Characterisation of tur dal husk has revealed that it is an excellent material for treating wastewaters containing low concentration of metal ions.

Key words: Chromium biosorption, Iron biosorption, Agro-wastes, Tur dal husk, Cajanus cajan


Copyright © 2007 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission.¬†Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).