Year: 2026
Type: article
Abstract: Recently, the Cr(VI) contamination in drinking water has become a severe problem for human beings and aquatic life. The objective of this work is to develop an efficient adsorbent of iron zirconium bimetallic metal-organic frameworks (Fe-Zr MOFs) by a simple co-precipitation process and use it for Cr(VI) removal from aqueous solution. The morphologies, binding groups, microstructures, and textural properties of Fe-Zr MOFs were analysed with the Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, X-ray Diffraction (XRD), and N 2 adsorption–desorption instrumental techniques, respectively. Under the optimum condition of pH 3, the concentration of Cr(VI) ion is 10 F, time 150 min, and adsorbent dose of 0.250 g/L, the Fe-Zr MOFs were able to remove 95% of Cr(VI) from aqueous solution. The adsorption capacity of Fe-Zr MOFs was 123.40 mg/g as found from the Langmuir isotherm model. The chemisorption nature of the Cr(VI) adsorption on the Fe-Zr MOFs surface was confirmed by the pseudo-second-order kinetic model with a correlation coefficient of 0.95. The Fe-Zr MOFs were also able to remove Cr(VI) even in the presence of other anions with the order of Cl − > NO 3 − > CO 3 2− > SO 4 2− > PO 4 3− respectively. The material could be reused for several cycles, as above 90% of regeneration was done with 0.1 M NaOH solution. Pore diffusion, electrostatic attraction, and chemical coordination mechanisms were the main interactions between Cr(VI) ions and the Fe-Zr MOFs surface. Hence, the Fe-Zr MOFs can be applied as a promising adsorbent for the treatment of Cr(VI) contaminated polluted water.
Source: Discover Chemistry.
Authors: Neyyala Chaitanya, Uttam Kumar Sahu
Institution: GIET University
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7154745604