Removal of iron, zinc, and nickel-ions using nano bentonite and its applications on power station wastewater

Removal of high concentrations of toxic heavy metals from wastewater is very important within the environmental field because heavy metals pollution a serious environmental problem due to them being nonbiodegradable. This study shed some light on the use of Nano bentonite as an adsorbent for the elimination of Iron, Zinc, and Nickel ions from wastewater, and the optimum conditions were evaluated to find out thermodynamic and kinetic parameters and equilibrium adsorption models have been applied. The results showed that adsorption percentage increases with increasing temperature, speed of rotation, and volume of solution, but decreases with adsorbent dose and initial concentration increase. The adsorption process has fit pseudo-second-order kinetic model Langmuir and Freundlich adsorption isotherm models were applied to analyze adsorption data and both were found to apply to these adsorption processes. Thermodynamic parameters e.g., Delta G(o), Delta S-o, and Delta H-o of the adsorption process were found to be endothermic. Finally, the Nano bentonite was observed to be more powerful for the removal of Fe (III), Zn (II), and Ni (II) at the same experimental conditions.

Automated summary

This study investigated the use of Nano bentonite as an adsorbent for removing Iron, Zinc, and Nickel ions from wastewater, finding that adsorption efficiency increased with certain parameters such as temperature and solution volume. The adsorption process followed pseudo-second-order kinetics and Langmuir and Freundlich adsorption isotherm models were applied, showing that the process was endothermic. Nano bentonite was found to be effective for removal of Fe (III), Zn (II), and Ni (II) under the experimental conditions examined.