Efficient extraction of sulfate from water using a Zr-metal–organic framework

Abstract

A Zr-based MOF, NU-1000, comprised of Zr₆ nodes and tetratopic pyrene-containing linkers is studied for adsorption and extraction of SO₄²⁻ from water. The adsorption capacity and uptake time of SO₄²⁻ in NU-1000 is determined at varying concentrations to give an overall maximum adsorption capacity of 56 mg SO₄²⁻ per g of MOF. Selective adsorption of SO₄²⁻ by NU-1000 in the presence of other anions as well as regeneration of the sorbent is also explored.