@article{Yang2025, 
author = {Zhifei Yang and Baocheng Zhou and Guo Lin and Shixing Wang and Zhao Ding and Libo Zhang},
title = {Synthesis of functionalized magnetic bimetallic-based organic frameworks for efficient removal of Pb (II)},
year = {2025},
journal = {Environmental Chemistry and Safety},
volume = {1},
number = {2},
pages = {9600038},
keywords = {adsorption, MOF, Pb(II), bimetallic magnetic adsorbent},
url = {https://www.sciopen.com/article/10.26599/ECS.2025.9600038},
doi = {10.26599/ECS.2025.9600038},
abstract = {This investigation addressed the challenge of lead-containing wastewater treatment. We successfully synthesized a novel bimetallic magnetic adsorbent, MOF@Fe3O4-PAA, for Pb(II) removal by incorporating Ti ions via hydrothermal/chemical modification. Combined SEM, XRD, BET, FTIR, and XPS characterization elucidated its structure-property relationships. Results demonstrated optimal adsorption at pH 5.0 with a maximum capacity of 295.8 mg/g. Kinetics followed the pseudo-second-order model (R2=0.999), indicating chemisorption dominance. Isotherm analysis favored the Temkin equation (R2=0.979), suggesting combined physicochemical interactions. Thermodynamics revealed spontaneous exothermic adsorption (ΔG < 0, ΔH < 0) with enhanced efficacy at low temperatures. Selectivity tests showed significantly higher affinity for Pb(II) over competing ions (e.g., Cu2+, Zn2+). Amino (-NH2) and sulfhydryl (-SH) functional groups enabled Pb(II) binding via coordination, yielding high adsorption capacity, rapid equilibrium attainment, and facile magnetic recovery. This work provides an innovative strategy for efficient wastewater Pb(II) removal.}
}