Removal of Textile Dye by Bentonite and organo-bentonite

Title: Removal of Textile Dye by Bentonite and organo-bentonite
Paper category : conference
Book title: 2nd International Conference on Waste Engineering and Management - ICWEM 2010
Editor(s): J.Zh. Xiao, Y. Zhang, M.S. Cheung and Reuben P. K. Chu
Print-ISBN: 978-2-35158-102-5
e-ISBN: 978-2-35158-103-2
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 854 - 864
Total Pages: 11
Nb references: 23
Language: English

Abstract: Because of economic considerations, finding an alternative cost-effective sorbent is important. Clays are inexpensive minerals and available in many countries. Bentonite is one type of clay which is hydrophilic and ineffective for organic pollutant removal. Bentonite has an exchangeable cation which can be substituted by cationic detergent. Modification of bentonite is a method to convert organophobic material to organophilic sorbent.
In this study Bentonite was modified by commercial benzalkonium chloride. Aqueous solutions prepared from disperse blue 56 and pigment blue 60 were used and batch kinetic and isotherm experiments were carried out.
The adsorption was reached in equilibrium within 6h of contact time. Adsorption kinetics obeys a Pseudo-second order reaction. Adsorption isotherms were fitted with Langmuir and Freundlich models. Corresponding constants of both models were calculated. Adsorption efficiencies were increased with increasing the sorbents dose. Results indicated 85% and 78% removal of disperse blue and pigment blue respectively by organo-bentonite compared with a removal of 52 % and 45% achieved by ordinary bentonite.
Adsorption capacity of bentonite for dye removal can be effectively increased by modification with commercial cationic detergent.

Online publication: 2011-01-25
Publication type : full_text
Public price (Euros): 0.00

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