Equilibrium and kinetic mechanism for Reactive Black 5 sorption onto high lime Soma fly ash

被引：61

作者：

Eren, Zeynep ^{[1
]}

Acar, Filiz Nuran ^{[1
]}

机构：

[1] Ataturk Univ, Dept Environm Engn, TR-25240 Erzurum, Turkey

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 143卷 / 1-2期

关键词：

Adsorption isotherms; Adsorption kinetics; High lime fly ash; Intraparticle diffusion; Pseudo-first-order kinetics; Pseudo-second-order kinetics; Reactive dye;

D O I：

10.1016/j.jhazmat.2006.09.017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Batch adsorption studies were carried out for the sorption of C.I. Reactive Black 5, a reactive dye, onto high lime fly ash, obtained from Soma Thermal Power Plant (Turkey), to be low cost adsorbent. The effect of various experimental parameters such as contact time, adsorbent dose and initial dye concentration were investigated. Determination of the adsorption equilibrium concentrations was determined by UV-vis spectrophotometry analytical method. Equilibrium data were fitted to the Freundlich and Langmuir isotherm equations and the equilibrium data were found to be well represented by the Freundlich isotherm equation. The adsorption kinetics of C.I. Reactive Black 5 onto high lime fly ash were also studied to characterize of the surface complexation reaction. A pseudosecond-order mechanism has been developed to predict the rate constant of the adsorption, the equilibrium capacity and initial adsorption rate with the effect of initial concentration. A single-stage batch adsorber design of the adsorption of C.I. Reactive Black 5 onto high lime fly ash has been studied based on the Freundlich isotherm equation.

引用

页码：226 / 232

页数：7

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