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• W1263326188 abstract "This work is focussed on the determination of a kinetic model and the thermodynamic study of the electrochemical entrapment of the model azo dye, Acid Red 1, at conducting polypyrrole films, which is proposed as a potential green technology for treatment of azo dyes in industrial effluents. The entrapment kinetic data were found to follow a pseudosecond order model involving an intra-particle diffusion. However, the equilibrium data obtained for Acid Red 1 entrapment at polypyrrole did not obey any common surface adsorption models such as the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms. Accordingly, the entrapment process may lead to an enhanced quantity of dye embedded in a polypyrrole film, making it a more effective and efficient technology than those involving only adsorption. Similarly, dye leakage from polypyrrole film surface to a sample matrix will be easily prevented. For this treatment process, a negative ΔG° range between -1.46±0.78 and -2.94±0.24 kJ mol(-1) at the corresponding temperature range of 298-318 K, and a ΔH° of 20.5±2.5 kJ mol(-1) indicate a spontaneous and endothermic entrapment process. Also, a positive ΔS° (73.6±8.2 J mol(-1) K(-1)) reveals increased randomness of the interface and an affinity of Acid Red 1 towards polypyrrole films. A low activation energy (7.67±0.80 kJ mol(-1)) confirms a physical process for Acid Red 1 entrapment at polypyrrole films." @default.
• W1263326188 created "2016-06-24" @default.
• W1263326188 creator A5016020246 @default.
• W1263326188 creator A5049234117 @default.
• W1263326188 date "2015-11-01" @default.
• W1263326188 modified "2023-09-27" @default.
• W1263326188 title "Kinetic model and thermodynamic study of Acid Red 1 entrapment at electropolymerised polypyrrole films" @default.
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• W1263326188 doi "https://doi.org/10.1016/j.jcis.2015.06.049" @default.
• W1263326188 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26183343" @default.
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