چکیده:
In this study, removal of cadmium from aqueous solution was conducted by
chitosan and MCM-41 nano composite. Response surface methodology (RSM)
was used for modeling and optimizing the process, and to gain a better
understanding of the process performance. Centered Composite Design (CCD)
was used as the experimental design .Parameters effects such as temperature, pH,
contact time, initial Cd(II) concentration and adsorbent dose on the adsorption
process were studied. The numerical optimization revealed that the optimum
removal (87.15%) obtained at ct/mcm-41 dosage of 0.1g, initial Cd (II)
concentration of 20 mgL-1, contact time of 30 min, temperature 300c and pH of 6.
خلاصه ماشینی:
Application of response surface methodology for optimization of cadmium (II) in aqueous solution by chitosan/MCM-41 Abbas Teimouri* , Fatemeh Dadkhah Tehrani 1.
com; Fax: +98-31-33521802; Tel: +98-31-33521804 Abstract In this study, removal of cadmium from aqueous solution was conducted by chitosan and MCM-41 nano composite.
In this work, for the first time, we synthesized the Chitosan/ MCM-41 nano composite adsorbent for Cd (II) removal.
Also, the effects of different experimental conditions, such as initial Cd(II) concentration, the initial pH value of the cadmium solution, adsorbent dose, contact time and adsorption temperature, were investigated.
The central composite design (CCD) under RSM was used for determining the optimum conditions of Cd (II) removal from aqueous solution by varying the five independent factors of initial Cd (II) concentration, pH, contact time, temperature and dosage of chitosan/MCM-41.
The coded levels and the natural values of these factors set in the chosen variables were solution pH (x1), initial concentration of Cd (II) (mg L_1)(x2), chitosan/MCM-41 dosage (g L_1)(x3) , contact time(min)(x4) and temperature(x5) .
Application of Chitosan/ MCM-41 could be as an effective adsorbent for removing the Cd (II) from contaminated water resources.
This study tried to synthesize and characterize Chitosan/ MCM-41 and then examine their performance on Cd (II) removal from aqueous solution using CCD under the RSM.
The potential of synthesized Chitosan/ MCM-41 to remove Cd (II) from aqueous solutions was investigated in batch experiments, where several parameters such as the contact time, initial Cd (II) concentration, pH, temperature and Chitosan/ MCM-41 dosage were investigated.