title: Transition metal ion capture using functional mesoporous carbon made with 1,10-phenanthroline.
abstract: Functional mesoporous carbon has been built using 1,10-phenanthroline as the fundamental building block, resulting in a nanoporous, high surface area sorbent capable of selectively binding transition metal ions. This material had a specific surface area of 870 m2/g, an average pore size of about 30 Å, and contained as much as 8.2 wt% N. Under acidic conditions, where the 1,10-phenanthroline ligand is protonated, this material was found to be an effective anion exchange material for transition metal anions like [Formula: see text] and [Formula: see text]. 1,10-Phenanthroline functionalized mesoporous carbon ("Phen-FMC") was found to have a high affinity for Cu(II), even down to a pH of 1. At pHs above 5, Phen-FMC was found to bind a variety of transition metal cations (e.g. Co(II), Ni(II), Zn(II), etc.) from filtered ground water, river water and seawater. Phen-FMC displayed rapid sorption kinetics with Co(II) in filtered river water, reaching equilibrium in less than an hour, and easily lowering the [Co(II)] to sub-ppb levels. Phen-FMC was found to be more effective for transition metal ion capture than ion-exchange resin or activated carbon.
authors.affiliation: Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, United States.
authors.forename: Wilaiwan
authors.initials: W
authors.lastname: Chouyyok
authors.forename: Wassana
authors.initials: W
authors.lastname: Yantasee
authors.forename: Yongsoon
authors.initials: Y
authors.lastname: Shin
authors.forename: Rafal M
authors.initials: RM
authors.lastname: Grudzien
authors.forename: Glen E
authors.initials: GE
authors.lastname: Fryxell
keywords: Anion exchange; Dialysis; Ion exchange; Mesoporous carbon; Metal ion chelation; Metal poisoning; Nanoporous; Natural waters; Sorbent; Water purification