Removal of nickel from aqueous solutions using Saudi activated bentonite

Abstract

This research project investigates the application of Saudi activated clay (bentonite) to remove nickel from aqueous solutions. The removal characteristics of nickel ions from aqueous solution using Saudi activated bentonite were investigated under various operating variables like shaking time, solution pH, clay dosage and initial metal concentration. The results showed that the sorption of nickel ions on Saudi activated clay was relatively fast and the equilibrium was reached after 40 min. They also showed that increasing the initial nickel concentration decreased nickel removal percentage due to the saturation of clay with nickel ions. Furthermore, the adsorption of nickel increases from 70 to 100% with an increase in solution pH from 2.0 to 9.0. The adsorption isotherm data were well fitted with both the linearized Langmuir and Freundlich models. Nickel adsorption onto Saudi activated bentonite was well represented by the pseudo-second-order kinetic model.

Removal of cadmium from waste water using Saudi activated bentonite

“…Saudi activated bentonite was used for the removal of lead and nickel from aqueous solutions. The results showed that using Saudi bentonite to remove heavy metals from aqueous solutions is promising process [20,21].…”

Magnetic/Polyetherimide-Acrylonitrile Composite Nanofibers for Nickel Ion Removal from Aqueous Solution

“…The adsorption percentage increased with increasing pH and reached its highest values at approximately pH ≤ 8. Lower adsorption percentages were observed at lower pH values due to the formation of H + that covered the metal ions [ 42 , 43 , 44 ]. The PEI-AN and Fe/PEI-AN showed maximum adsorption efficiencies of at a pH ≤ 8 that were 83 and 91%, respectively.…”