Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
582251 | Journal of Hazardous Materials | 2009 | 11 Pages |
Abstract
The purpose of this study is to suggest an efficient process, which does not require a huge investment for the removal of direct dye from wastewater. Activated carbon developed from agricultural waste material was characterized and utilized for the removal of Direct Navy Blue 106 (DNB-106) from wastewater. Systematic studies on DNB-106 adsorption equilibrium and kinetics by low-cost activated carbons were carried out. Adsorption studies were carried out at different initial concentrations of DNB-106 (50, 75, 100, 125 and 150 mg lâ1), contact time (5-180 min), pH (2.0, 3.0, 4.7, 6.3, 7.2, 8.0, 10.3 and 12.7) and sorbent doses (2.0, 4.0 and 6.0 g lâ1). Both Langmuir and Freundlich models fitted the adsorption data quite reasonably (R2 > 97). The maximum adsorption capacity was 107.53 mg gâ1 for 150 mg lâ1 of DNB-106 concentration and 2 g lâ1 carbon concentration. Various mechanisms were established for DNB-106 adsorption on developed adsorbents. The kinetic studies were conducted to delineate the effect of initial dye concentration, contact time and solid to liquid concentration. The developed carbon might be successfully used for the removal of DNB-106 from liquid industrial wastes.
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Authors
Azza Khaled, Ahmed El Nemr, Amany El-Sikaily, Ola Abdelwahab,