Adsorption of Acid Red 57 from aqueous solutions onto polyacrylonitrile/activated carbon composite.
The adsorption of Acid Red 57 (AR57) onto Polyacrylonitrile/activated carbon (PAN/AC) composite was investigated in aqueous solution in a batch system with respect to contact time, pH and temperature. Physical characteristics of (PAN/AC) composite such as fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) were obtained. Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms and the isotherm constants were determined. The activation energy of adsorption was also evaluated for the adsorption of AR57 onto (PAN/AC) composite. The pseudo-first-order and pseudo-second-order kinetic models were used to describe the kinetic data. The dynamic data fitted the pseudo-second-order kinetic model well. The activation energy, change of free energy, enthalpy and entropy of adsorption were also evaluated for the adsorption of AR57 onto (PAN/AC) composite. The thermodynamics of the adsorption indicated spontaneous and exothermic nature of the process. The results indicate that (PAN/AC) composite could be employed as low-cost material for the removal of acid dyes from textile effluents.
Department of Chemistry, Faculty of Science, University of Damietta, Damietta 34517, Egypt. Electronic address: abindary@yahoo.com.
Ashraf A
AA
El-Bindary
Department of Chemistry, Faculty of Science, University of Damietta, Damietta 34517, Egypt.
Mostafa A
MA
Diab
Department of Chemistry, Faculty of Science, University of Port Said, Port Said, Egypt.
Mostafa A
MA
Hussien
Department of Chemistry, Faculty of Science, University of Damietta, Damietta 34517, Egypt.
Adel Z
AZ
El-Sonbati
Department of Chemistry, Faculty of Science, University of Port Said, Port Said, Egypt.
Ahmed M
AM
Eessa
D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry / Q000302:isolation & purification*; D002606:Charcoal / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D009281:Naphthalenes / Q000737:chemistry / Q000302:isolation & purification*; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*
D000180:Acrylic Resins; D001391:Azo Compounds; D004396:Coloring Agents; D009281:Naphthalenes; D012996:Solutions; D014874:Water Pollutants, Chemical; C499746:acid red 57; D002606:Charcoal; C010504:polyacrylonitrile
Acid dye; Adsorption; Isotherms; Kinetics; Polyacrylonitrile; SEM