پديدآورندگان :
Ghasemi Shokokoofeh School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran , Mansouri Siavash Faculty of Chemical Engineering, Babol University of Technology, Babol, Iran , Mehdipour Ghazi Mohsen School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran , ghorbani Mohsen Faculty of Chemical Engineering, Babol University of Technology, Babol, Iran
كليدواژه :
nanocomposite , Zn ions , column , effluent , breakthrough
چكيده فارسي :
In the present study, maghemite (γ−Fe2O3) nanoparticles were synthesized in one step by co-precipitation method and then coated by polyrhodanine via chemical oxidation polymerization. The prepared magnetic nanocomposite was used as an effective adsorbent to separate zinc ions from aqueous solution in a fixed-bed column. The effect of influent Zn concentration on the breakthrough characteristics of the adsorption system was determined. Various initial Zn concentrations from 50 to 150mg/L were used. The breakthrough time, exhausted time and treated volume decreased with the increase of influent concentration. The maximum percentage of Zn adsorption on γ−Fe2O3/polyrhodanine nanocomposite was 59.5% at 50mgL-1 influent concentration of Zn ions. The amount of maximum adsorption capacity increased from 20.59mg/g to 33.6mg/g with increasing influent concentration from 50mg/L to 150mg/L. The increase of maximum capacity with increasing of initial Zn concentration may be due to the higher driving force which led to decrease of mass transfer resistance.
