Adsorption study for removal of basic red dye using bentonite

Hu, Q. H., Qiao, S. Z., Haghseresht, F., Wilson, M. A. and Lu, G. Q. (2006) Adsorption study for removal of basic red dye using bentonite. Industrial & Engineering Chemistry Research, 45 2: 733-738.


Author Hu, Q. H.
Qiao, S. Z.
Haghseresht, F.
Wilson, M. A.
Lu, G. Q.
Title Adsorption study for removal of basic red dye using bentonite
Journal name Industrial & Engineering Chemistry Research  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2006
Sub-type Article
DOI 10.1021/ie050889y
Volume number 45
Issue number 2
ISSN 0888-5885
Start page 733
End page 738
Total pages 6
Editor Donald R. Paul
Spiro D. Alexandratos
Place of publication United States
Publisher American Chemical Society
Collection year 2006
Language eng
Subject C1
291804 Nanotechnology
670799 Other
Abstract Colored wastewater poses a challenge to the conventional wastewater treatment techniques. Solid-liquid phase adsorption has been found to be effective for the removal of dyes from effluent. In this paper, the ability of bentonite as an adsorbent for the removal of a commercial dye, Basic Red 2 (BR2), from an aqueous solution has been investigated under various experimental conditions. The adsorption kinetics was shown to be pseudo-second-order. It was found that bentonite had high adsorption capacity for BR2 due to cation exchange. The adsorption equilibrium data can be fitted well by the Langmuir adsorption isotherm model. The effect of the experimental parameters, such as temperature, salt, and pH was investigated through a number of batch adsorption experiments. It was found that the removal of dye increased with the increase in solution pH. However, the change of temperature (15-45 degrees C) and the addition of sodium chloride were found to have little effect on the adsorption process. The results show that electrostatic interactions are not dominant in the interaction between BR2 and bentonite. It was found that the adsorption was a rapid process with 80-90% of the dye removed within the first 2-3 min. Bentonite as an adsorbent is promising for color removal from wastewater.
Keyword Engineering, Chemical
Low-cost Adsorbents
Aqueous-solutions
Acid Dye
Surface-chemistry
Methylene-blue
Waste-water
Sorption
Decolorization
Equilibrium
Dyestuffs
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 10:10:29 EST