International Journal of Applied Science and Engineering
Published by Chaoyang University of Technology

D. Krishnaa*, K. Siva Krishnaa, and R. Padma Sreeb

aDepartment of Chemical Engineering, M.V.G.R. College of Engineering, Vizianagaram, India
bDepartment of Chemical Engineering, A.U. Collge of Engg (A), Visakhapatnam, India


 

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ABSTRACT


The potential use of Borasus flabellifer coir powder for the removal of chromium (VI) from aqueous solution has been investigated in batch mode experiments. Percentage removal of chromium (VI) is found to be 97.6% at pH 2, amount of adsorbent dosage of 0.5 g in 50 mL solution and temperature of 303 K. Influences of parameters like initial chromium (VI) concentration (5-30 mg/L), pH (1-3), and biomass dosage (10-14 g/L) on chromium (VI) adsorption were examined using response surface methodology. The Box-Behnken experimental design in response surface methodology was used for designing the experiments as well as for full response surface estimation and 15 trials as per the model were run. The optimum conditions for maximum removal of chromium (VI) from an aqueous solution of 20 mg/L were as follows: adsorbent dosage (10.1869 g/L), pH 1.9 and initial chromium (VI) concentration (6.3244 mg/L). The high correlation coefficient (R2 =0.989) between the model and the experimental data showed that the model was able to predict the removal of chromium (VI) from aqueous solution using B. flabellifer coir powder efficiently.


Keywords: Box-behnken design (BBD); borasus flabellifer coir powder; chromium (VI); adsorption.


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ARTICLE INFORMATION


Received: 2012-12-10
Revised: 2013-03-15
Accepted: 2013-03-26
Available Online: 2013-06-01


Cite this article:

Krishna, D., Krishna, K.S., Sree, R.P. 2013. Response surface modeling and optimization of chromium (Vi) removal from aqueous solution using borasus flabellifer coir powder. International Journal of Applied Science and Engineering, 11, 213–226. https://doi.org/10.6703/IJASE.2013.11(2).213