Mesoporous Core-Shell Nanostructure with Integrated Magnetic Functionality for the Adsorptive Removal of Diclofenac from Aqueous Solutions

Zalani, Somayeh; Sheikhzadeh Takabi, Asiyeh; Abbasi, Fereshteh

doi:10.66437/JNS.2510.1014.1.3.6

Mesoporous Core-Shell Nanostructure with Integrated Magnetic Functionality for the Adsorptive Removal of Diclofenac from Aqueous Solutions

Document Type : Original Article

Authors

Somayeh Zalani ¹

Asiyeh Sheikhzadeh Takabi ²

Fereshteh Abbasi ³

¹ Faculty of Natural Resources and Environment, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran.

² Department of Chemistry, Faculty of Science, Shahid Chamran University of Ahvaz, Iran

³ Department of Chemistry, Il.C., Islamic Azad University, Ilam, Iran

10.66437/JNS.2510.1014.1.3.6

Abstract

Pharmaceutical pollutants such as Diclofenac (DCF) remain in aquatic environments, leading to risks for ecological and human health. This research introduces a novel nanoporous magnetic Fe₃O₄@Bi₂O₃ core-shell nanocomposite intended for effective DCF adsorption. The composite features a magnetic Fe₃O₄ core encased in a highly porous, flower-like Bi₂O₃ shell, ensuring easy separability and outstanding uptake capacity. Structural analyses, including SEM, TEM, XRD, FT-IR, and BET, verified the successful creation of a nanoporous material with a surface area of 11.19 m² g⁻¹. Batch adsorption tests assessed the influences of initial DCF concentration, adsorbent dosage, contact time, and pH values. Findings revealed that the nanocomposite demonstrated remarkable adsorption capability, attributed to its extensive surface area and the synergistic interactions of the core and shell. Maximum monolayer capacity was recorded at 84.7 mg g⁻¹, aligning with the Freundlich isotherm and following pseudo-second-order kinetics. The Fe₃O₄@Bi₂O₃ showed excellent reusability and significant promise for sustainable water treatment, with adsorption mechanisms driven by electrostatic interactions, π–π stacking, and pore-filling within the nanoporous.

Keywords

Adsorption

Diclofenac

Core-Shell Nanocomposite

Magnetic Separation

Water Treatment