Studying the Adsorption of Textile Dye "Direct Yellow (DY) dye" From Aqueous Solution by Using White Marble. | ||
| Journal of University of Babylon | ||
| Article 1, Volume 22, Issue 1, January 2014, Pages 434-444 | ||
| Authors | ||
| ASEEL M. ALJEBORI; ABBAS N. ALSHIRIFI | ||
| Abstract | ||
| The adsorption characteristics of Direct Yellow (DY) dye from aqueous solution were evaluated. The effect of various parameters such as initial concentration of DY, solution pH, temperature, adsorbent dose, and shaking contact time have been investigated. Adsorption capacity was found to increase with an increase in the initial concentration of DY and agitation time. The applicability of adsorption isotherms to study the adsorption behavior has also been analyzed by Langmuir, Freundlich and Tempkin isotherm models were used to illustrate the experimental isotherms and isotherm's constants, It was found Freundlich isotherm model give good fittings when compare with Langmuir and Tempkin model. The extent of adsorption was found decrease with the temperature increased. The thermodynamic parameters (ΔG, ΔH, and ΔS) were calculated, (ΔG) was calculated from equilibrium constant, and were explained in the mean of the chemical structure of the adsorbate. | ||
| Keywords | ||
| adsorption; white marbe; direct yellow | ||
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