Removal of Ni (II) from aqueous solutions by adsorption onto Ricinus communis seed shell activated carbons.
The adsorption studies on the removal of Ni(II) from aqueous solution using Ricinus communis seed shells activated carbon and polypyrrole coated Ricinus communis seed shells activated carbon were carried out under various experimental conditions. The effects of various process parameters have been investigated by following the batch adsorption technique. Adsorption data was modeled with Freundlich, Langmuir and tempkin adsorption isotherms. Thermodynamics parameters such as DeltaH0, DeltaS0, and DeltaG0 were calculated indicating that the adsorption was spontaneous and endothermic nature. A mechanism, involving intra particle diffusion and surface adsorption, has been proposed for the adsorption of Ni(II) onto the adsorbent. Adsorbent used in this study is characterized by FTIR and SEM before and after the adsorption of metal ions.
Department of Chemistry, AMS Engineering College, Namakkal--637 013, India thamilnklres2006@yahoo.com
P
P
Thamilarasu
K
K
Karunakaran
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D009532:Nickel / Q000302:isolation & purification*; D012278:Ricinus / Q000196:embryology*; D012639:Seeds / Q000737:chemistry*; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D012996:Solutions; D014874:Water Pollutants, Chemical; D002244:Carbon; D009532:Nickel