Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

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Characteristics of Chemical Equilibrium, Kinetics and Mechanism of Sorptive Removal of Reactive Dye (Blue MR) Using Activated Carbons

Author(s): Ch. Suresh Babu, Ch. Chakrapani and K. Somasekhara Rao

Investigations are made to examine the commercial reactive dye (Blue MR) removal from water by prepared activated carbons, exploring the mechanism involved. Three activated carbon adsorbents, NCDC, NCMC and NCAC are prepared from peels of some selected citrus fruits citrus documana, citrus medica and citrus aurantifolia respectively. These are characterized by SEM-EDAX, FT-IR analysis. The Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich (D-R) isotherms were used to describe adsorption equilibrium. The results indicate that Langmuir isotherm was fitted well with the adsorption equilibrium data. The kinetic process was investigated using the pseudo-first-order, pseudo-second-order, intra-particle diffusion, pore diffusion and Elovich models. The adsorption process offered excellent fit with pseudo-secondorder model. The pH plays an important role in adsorption process. The adsorption capacity is not significantly affected in presence of electrolytes. Amino groups present on the carbon surface are believed to be binding sites for dye adsorption.


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