Goyal, PrateekPrateekGoyalTiwary, Chandra ShekharChandra ShekharTiwaryMisra, Superb K.Superb K.Misra2025-08-312025-08-312021-01-0110.1016/j.jenvman.2020.1114692-s2.0-85092205863https://d8.irins.org/handle/IITG2025/2379033049615Polyacrylic acid capped Fe<inf>3</inf>O<inf>4</inf> – Cu-MOF (i-MOF) hybrid was prepared for rapid and selective lead removal, with 93% removal efficiency, exceptional selectivity, and adsorption capacity of 610 mg/g and 91% of i-MOF hybrid could be easily separated from the contaminated water using magnetic separation. The adsorption process followed a pseudo-second-order model and the adsorption efficiency decreased from 93% to 83% on raising the temperature from 25 °C to 40 °C. The change in equilibrium adsorption capacity with respect to equilibrium adsorbate concentration followed the Langmuir isotherm model. i-MOF had a high selectivity coefficient and removal efficiency for lead ions even when exposed simultaneously with naturally abundant cations (Na(I), Ca(II), Mg(II)). Release of Cu(II) ions from the i-MOF after Pb(II) removal suggested suggested ion-exchange to be the dominant removal mechanism. This new finding for Pb(II) removal with excellent adsorption performance using i-MOF through ion exchange based approach is a viable option for treating lead contaminated water.falseAdsorption | Cu-MOF composite | Ion-exchange | Lead removal | MOF hybridArticle109586301 January 2021106111469arJournal102