A cation-exchange metal–organic
framework sorbent with high
adsorption capacity, active anionic surface, available adsorptive
sites, good response in magnetic field and also available enclosed
space between the particles for encapsulation of the analyte was in
situ prepared by magnetization of a metal organic framework structure
of aluminum named as MIL-96(Al). The units of magnetic MIL-96(Al)
was synthesized by embedding method under hydrothermal condition and
well characterized. The mechanism of sorption can be the electrostatic
interaction between the anionic structures of the adsorbent with hydrated
Pb2+ ions. The high percent of OH groups on the surface
of Fe3O4/MIL-96(Al) led to high adsorption capacity
(>301.5 mg g–1) of the sorbent for Pb2+ ions in aqueous media. The thermodynamic study of Pb2+ adsorption onto the sorbent surface demonstrated that the process
was spontaneous, exothermic and physical. The face-centered central
composite design was applied for optimizing the adsorption conditions,
and the effective parameters were obtained as pH of 6.92, amount of
sorbent of 32.4 mg and adsorption time of 25 min.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.