ADSORPTION OF DISSOLVED IONS IN MINE WASTEWATER WITH LATERITE AND IRON OXIDE NANOPARTICLES

ADSORPTION OF DISSOLVED IONS IN MINE WASTEWATER WITH LATERITE AND IRON OXIDE NANOPARTICLES

Abstract:
Mine wastewater is a significant environmental concern due to its high concentrations of dissolved ions, heavy metals, and other contaminants. Traditional treatment methods are often inefficient and costly, necessitating the exploration of alternative approaches. This study investigates the use of laterite and iron oxide nanoparticles as adsorbents for the removal of dissolved ions in mine wastewater.

The adsorption potential of laterite and iron oxide nanoparticles was evaluated through batch experiments. The physicochemical properties of the adsorbents, such as specific surface area, pore size distribution, and surface functional groups, were characterized using techniques like Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR).

The results demonstrated that both laterite and iron oxide nanoparticles exhibited a high affinity for various dissolved ions present in mine wastewater. The adsorption efficiency was influenced by factors such as initial ion concentration, contact time, pH, and adsorbent dosage. The adsorption isotherms and kinetics were analyzed using models like Langmuir, Freundlich, and pseudo-second-order equations.

The findings revealed that the adsorption of dissolved ions onto laterite and iron oxide nanoparticles followed a monolayer adsorption process, as indicated by the Langmuir isotherm model. The maximum adsorption capacities were determined, indicating the potential of the adsorbents for wastewater treatment applications. Moreover, the pseudo-second-order kinetic model provided a better fit to the experimental data, suggesting chemisorption as the rate-limiting step.

The characterization techniques confirmed the presence of active sites on the surface of laterite and iron oxide nanoparticles, which facilitated the adsorption process. The high surface area and porous structure of the nanoparticles contributed to their enhanced adsorption capacity.

Overall, this study demonstrates the potential of laterite and iron oxide nanoparticles as effective adsorbents for the removal of dissolved ions in mine wastewater. The findings contribute to the development of sustainable and cost-effective treatment strategies for mining industry effluents, offering a promising solution for mitigating environmental pollution caused by dissolved ions and heavy metals in mine wastewater.

Keywords: adsorption, dissolved ions, mine wastewater, laterite, iron oxide nanoparticles, adsorbents, physicochemical properties, Langmuir isotherm, pseudo-second-order kinetics.

ADSORPTION OF DISSOLVED IONS IN MINE WASTEWATER WITH LATERITE AND IRON OXIDE NANOPARTICLES, GET MORE MATERIALS SCIENCE AND ENGINEERING

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