Author/Authors :
Bazrafshan، Edris نويسنده Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran , , Rahdar، Somaiieh نويسنده Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran , , Balarak، Davoud نويسنده Student Research Committee, Department of Environmental Health, School of Health, Mazandaran University of Medical Sciences, Sari, Iran , , Mostafapour، FerdosKord نويسنده Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran , , Zazouli، Mohammad Ali نويسنده Department of Environmental Health Engineering, Faculty of Health and Health Sciences Research Center, Mazandaran University of Medical Sciences, Sari ,
Abstract :
Background and purpose:At present study, acid modified banana leaf ash was used as an adsorbent for the successful removal of Reactive Black 5 (RB5) dye from aqueous environments.
Materials and Methods:The effect of various operating parameters such as pH of solution, dye concentration, contact time, adsorbent dosage, and the temperature was investigated.
Results:Maximum adsorption capacity of the banana leaf ash was 191.32 mg/g at pH 2, the initial concentration of 200 mg/l and 323° K when 95.66% of the dye was removed. The process followed pseudo-second-order kinetics. Furthermore, equilibrium data were better represented by Freundlich isotherm among Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich equilibrium isotherm models. The negative values of free energy change confirmed the feasibility of the process and the spontaneous nature of adsorption. Furthermore, from the magnitude of ?H, the process was found to be endothermic physisorption.
Conclusion:According to the results of this study, it was found that the acid modified banana leaf ash is not only a low-cost adsorbent, but also has high performance in the removal of RB5 from aqueous environments.
