ISSN: 1813-0410

Keywords : Removal


Removal of Azo Benzidine Reactive Dye From Aqueous Solution By Adsorption onto ZnO Surface

Wafaa Naser Mohammed Saeed

journal of kerbala university, Volume 9, Issue 4, Pages 11-18

In this study, the adsorption of azo benzidine reactive dye was carried out by using ZnO surface. Various parameters such as pH, adsorbent weight, initial dye concentration and contact time were studied in terms of their effect on the adsorption process. Furthermore, Lagergren’s equation was used to determine adsorption kinetics. It is observed that high removal of dye was obtained at pH=5. Removal of dye was increased by increasing initial dye concentration and contact time. High removal of dye was at the time equivalent of 90 min and reached equilibrium. Increasing of adsorbent weight leads to decrease dye adsorption where 0.1gm was the best weight. For kinetics the reaction onto ZnO followed pseudo-second order Lagergren’s equation.

Removal of Azo Dye Reactive Black 5 By Adsorption onto ZnO and CaO

Wafaa Naser Mohammed Saeed

journal of kerbala university, Volume 9, Issue 2, Pages 321-330

In this study, the adsorption of reactive black 5 dye was carried out by
using various surfaces, namely ZnO and CaO. The validity of the adsorption was evaluated by using UV Spectrophotometry through the determination the amount of adsorbed dye. Various parameters such as pH, adsorbent weight, initial dye concentration and contact time were studied in terms of their effect on the reaction progress. Furthermore, Lagergren’s equation was used to determine adsorption kinetics. It is observed that high removal of dye was obtained at pH=5. Removal of dye was increased by increasing initial dye concentration and contact time. High removal of dye was at the time equivalent of 70 min and reached equilibrium. Increasing of adsorbent weight leads to decrease dye adsorption where 0.1gm was the best weight. For kinetics the reaction onto CaO followed pseudo-first order Lagergren’s equation while the reaction onto ZnO followed pseudo-second order Lagergren’s equation and the adsorbed amount onto CaO surface was more than that of ZnO surface.

Adsorption of Methylene Blue Dye from Wastewater By Spent Tea Leaves

Ihsan Habib Dakhil

journal of kerbala university, Volume 9, Issue 1, Pages 5-14

The aim of present work was to investigate the ability adsorption of methylene blue (MB) dye from wastewater using low-cost adsorbent, spent tea leaves (STL), in batch isotherm adsorption technique. The adsorption experiments were carried out under different conditions of initial dye concentration (50-500) mg/l, STL dose (0.05-1) g, pH solution (2-11), and contact time (10-180) min under constant temperature of 30 oC. The results were indicated that the optimum conditions were adsorbent dose was 0.43 g per 100 ml dye solution, pH=7. The equilibrium isotherms have been analyzed using the Langmuir and Freundlich models. The experimental results were best described by the Freundlich isotherm model with maximum monolayer adsorption capacities found to be 62.2 mg/g with the high value of correlation coefficient. The results suggested that STL has high potential 98% to be used as effective adsorbent for MB dye removal.