Equilibrium sorption study for the preconcentration, removal, or recovery of nickel ion from aqueous solution on immobilized silica gel followed by AAS determination

摘要

The potential use of a solid phase sorbent prepared via immobilization of salicylaldoxime on a silica gel surface for the purpose of preconcentration, removal, or recovery of Ni(II) from the aqueous phase has been investigated. The efficiency of the solid phase thus synthesized was evaluated by an equilibrium sorption study of Ni(II) in both the static and dynamic modes. The process is dependent on length of shaking period, agitation speed, adsorbent dose, pH, temperature, and flow rate of the feed solution. The adsorption data were fitted to the Langmuir adsorption isotherm model. The negative-free energy change indicates the process to be favorable.