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

A Zr-based MOF, NU-1000, comprised of Zr-6 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.