Thermodynamic and Kinetic Study of Adsorption of Azo Dyes Derived for 4-amino Anti pyrene by Activated Carbon

Hekmat, Salah

doi:10.33899/edusj.2019.125920.1006

	Thermodynamic and Kinetic Study of Adsorption of Azo Dyes Derived for 4-amino Anti pyrene by Activated Carbon
Journal of Education and Science
Article 5, Volume 29, Issue 2, 2020, Pages 63-81 PDF (618.52 K)
Document Type: Review Paper
DOI: 10.33899/edusj.2019.125920.1006
Author
Salah Hekmat^*
قسم الکیمیاء کلیة التربیة للعلوم الصرفة جامعة الموصل
Abstract
A commercial activated carbon was used for the study of adsorption of two di- azo dyes from aqueous solution employing batch method. These dyes were synthesized in our laboratory from the reaction of 4-amino-antipyrene 4-AAP and β-Naphthol with p-amino phenol and p-amino benzaldehyde via diazonium ions. The effect of pH, temperature, and contact time on dye removal was investigated. The apparent thermodynamic parameters were estimated and the obtained results concluded that, the dyes adsorbed onto activated carbon are driven by entropy effect, exothermic and spontaneous processes. The kinetic study of adsorption of the considered dyes was conducted by applying four models the pseudo-first order, pseudo-second order ,Elovich and intra particules diffusion kinetic models. The results showed that, the second order equation fit better the experimental data. The intra particule diffusion model indicates that, there are more than mechanism controlling the adsorption process.the adsorption process occurs through more than one mechanical and that the intra particule diffusion model is not the only mechanical that controls the adsorption of systems Studied.
Keywords
4-amino antipyrin,,; ,،,؛Thermodynamic of adsorption,,; ,،,؛Kinetic of adsorption

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