Work

Nonlinear kinetics, isotherms, and thermodynamic approach in the carcinogenic ions elimination by Mn2.7Al0.3O4 sorbent

Year: 2025

Type: article

Abstract: Alundum was framed into hausmannite to acquire bimetallic nano Mn 2.7 Al 0.3 O 4 sorbent to explore the synergistic effect on the adsorption of carcinogenic ions. PXRD, FESEM-EDX, FTIR, and BET were used for the characterization of Mn 2.7 Al 0.3 O 4 . The diffractogram pattern disclosed that the tetragonal structure corresponds to JCPDS No 24–0734 with the platelet shape found in FESEM images. The BET studies of adsorbent exhibited Type-IV isotherm with H 3 loop having a mesoporous structure of 1.968 m 2 g − 1 surface area and 35.8 nm average pore diameter. The uptake mechanism of the carcinogenic ions on the Mn 2.7 Al 0.3 O 4 nano adsorbent surface pronounced that adsorption followed pseudo-second-order kinetics. The adsorption capacity for Cd(II) ions was 174.6 mgg − 1 and 75.39 mgg − 1 for Pb(II) ions adsorption from the Langmuir and the Sips models, which were envisaged by R 2 , RSS, ARE, and Chi 2 of the statistical functions, also nearer to experimental results. The thermodynamic investigations announced that Cd (II) and Pb (II) ion adsorption is a spontaneous and exothermic process with a free energy change of -29.05 kJmol − 1 and − 25.8 kJmol − 1 , respectively. High adsorption capacity and easy recovery of adsorbent implicated to use for removal of carcinogenic ions in any aqueous stream.

Source: Scientific Reports

DOI: 10.1038/s41598-025-03840-9

Authors: Lakshmi Narayani .R, Malathi Challa, Archna Narula, P.R Deepthi

Institutions: Ramaiah Institute of Technology, Visvesvaraya Technological University, Presidency University, Presidency University

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: Indian Institute of Science, Ramaiah Institute Of Technology