Experimental and Statistical approach to understand the adsorption properties of hazardous Cr(VI) on Al2O3@TiFe2O4 nanocomposite: An efficient adsorbent for water treatment

Abstract

Doping of metal oxide with other suitable component can enhance its structural and characteristic properties. At the end it improves its overall application performances. This study introduces the novel synthesis of Al₂O₃@TiFe₂O₄ nanocomposite via co-precipitation for Cr(VI) removal. Unlike previous studies, this unique material exhibits superior adsorption capacity and efficiency. The comparative analysis with existing adsorbents underscores its potential for industrial effluent treatment. The nanocomposite’s recyclability and minimal efficiency loss over multiple cycles highlight its sustainability for wastewater treatment. Overall, this research fills existing gaps by presenting an advanced, environmentally friendly adsorbent, significantly enhancing the field of wastewater treatment and environmental remediation. The nanocomposite was characterized and used to study Cr(VI) adsorption characteristics. Amount, contact time, pH, and Cr(VI) concentration were found to influence the adsorption characteristics of the nanomaterial. The operating conditions of an adsorbent Al₂O₃@TiFe₂O₄ are optimized utilizing the analysis of the adsorption kinetic data. As shown by the R² responses, which were close to unity, the adsorption behaviour of the nanomaterial is in excellent harmony with the linearized Langmuir isotherm with a maximum capacity of 312.52 mg/g. Additionally, Al₂O₃@TiFe₂O₄ active sites were more observed to be favorable for Cr(VI) ions at all experimental temperatures range, according to calculations of monolayer adsorption capacities using the Langmuir equation. The value of n was 0.40, 0.42, and 0.43, respectively 25, 35, and 45 °C. The adsorbent shows an adsorption capacity of 93 % with the RSD less than 2 %.