Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jhazmat.2012.09.019
Title: Competitive adsorption of Reactive Orange 16 and Reactive Brilliant Blue R on polyaniline/bacterial extracellular polysaccharides composite-A novel eco-friendly polymer
Authors: Janaki, V.
Vijayaraghavan, K. 
Ramasamy, A.K.
Lee, K.-J.
Oh, B.-T.
Kamala-Kannan, S.
Keywords: Biosorption
Competitive adsorption
Composite
Extra cellular polymeric substances
Polyaniline
Reactive dyes
Issue Date: 30-Nov-2012
Source: Janaki, V., Vijayaraghavan, K., Ramasamy, A.K., Lee, K.-J., Oh, B.-T., Kamala-Kannan, S. (2012-11-30). Competitive adsorption of Reactive Orange 16 and Reactive Brilliant Blue R on polyaniline/bacterial extracellular polysaccharides composite-A novel eco-friendly polymer. Journal of Hazardous Materials 241-242 : 110-117. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jhazmat.2012.09.019
Abstract: The performance of polyaniline/extracellular polymeric substances (Pn/EPS) composite as an adsorbent to remove the anionic reactive dyes, Reactive Brilliant Blue R (RBBR) and Reactive Orange 16 (RO), was investigated in single and binary systems. The pHpzc of Pn/EPS composite was calculated as 3.7 through potentiometric mass titration method. Electrostatic interaction between the dye anion and the nitrogen present in the polymer was identified as a major mechanism in adsorption process. Single component isotherms followed the Langmuir model with the maximum adsorption capacity of 0.5775mmolg-1 for RBBR and 0.4748mmolg-1 for RO. In binary system, both the reactive dye anions compete with each other and resulted in lower uptake. Binary adsorption data were interpreted well by the Sheindorf-Rehbun-Sheintuch equation as compared to extended Langmuir model with constant interaction factor. Kinetic analysis of single solute followed pseudo-first order model. Thermodynamic studies computed that RBBR and RO adsorption was endothermic, spontaneous, and feasible process. © 2012 Elsevier B.V.
Source Title: Journal of Hazardous Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/92853
ISSN: 03043894
DOI: 10.1016/j.jhazmat.2012.09.019
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