Removal of Ni (II) ion from aqueous solution using hydrogel bead and AAS measurement

Abstract

The adsorption removal is one of the techniques used for the treatment of industrial wastewater. In this research the principle of treatment consists on the removal of Ni (II) ion from wastewater. The elimination of this pollutant was done by using commercial hydrogel as adsorbent removal. Batch method removal at different temperature (5 – 25 o C) and different contact time (1 – 48 hr) applied to reach the equilibrium conditions for Ni(II) ion removal. The removal of Ni (II) ion improved by changing the pH, contact time, initial concentration and temperature. The residual (remained) Ni (II) ion was determined by using the Atomic Absorption Spectroscopy (AAS). The highest removal of Ni (II) ion was obtained at equilibrium with 24 hr and pH of 6.3. Maximum removal capacity was found to be 135.6 mg Ni (II) ion per g hydrogel bead. Pseudo – first – order kinetics and Langmuir isotherm were best fits for Ni (II) ion. All thermodynamic parameters were evaluated, ∆Hads was found to be 13.13 KJ/ mole.