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Journal of Environmental Biology

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

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        Abstract - Issue Nov 2016, 37 (6)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Removal of high concentrations of chromium from aqueous solutions using leaves of Tamarindus indica: Kinetics and equilibrium studies

 

A. Muthulakshmi1,3*, R. Baskaran2 and N. Ashwin Karthick3

 1Sathyabama University, Chennai-600 119, India

2Department of Chemical Engineering, St. Joseph's Engineering College, Chennai-600 119, India

3Department of Biotechnology, Jeppiaar Engineering College, Chennai-600 119, India

*Corresponding Author E-mail: visitmuthu1980@gmail.com

 

 

 Publication Data

Paper received:

20 September 2015

 

Revised received:

10 May 2016

 

Accepted:

20 August 2016

 

Abstract

The need for removal of heavy metal from the environment has been increasing. The present study was conducted to identify a potential ability of the plant leaf powder in removal of high concentrations of Cr (VI). Tamarindus indica, a widespread plant capable of growing under all climatic and soil conditions was evaluated for its potential to remove high concentration of Cr (VI) (1000 mgl-1) using leaf. The effect of process parameters such as pH, contact time and adsorbent dosage for Cr (VI) adsorption was studied. The results showed that at pH 3.0, up to 560 mgl-1 of Cr (VI) was adsorbed onto the surface of 1g of leaf within 30 min. However, desorption occurred with increase in contact time. While, stable adsorption of 260 mgl-1 was observed at pH 6.0 using 1g of adsorbent after 2 hrs. Further, it was observed that the adsorption phenomenon followed Langmuir adsorption isotherm. The kinetics of the adsorption studies was studied, and it was observed that the adsorption followed second order kinetics with second order rate constant of 2.4x10-4 g mg-1 min-1.   

 

 

 Key words

Adsorption isotherm, Adsorption kinetics, Chromium (VI), Tamarindus indica

 

 

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