skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Aqueous Sulfate Separation by Sequestration of [(SO4)2(H2O)4]4 Clusters within Highly Insoluble Imine-Linked Bis-Guanidinium Crystals

Journal Article · · Chemistry - A European Journal (Online)

Quantitative removal of sulfate from seawater was achieved by selective crystallization of the anion with a bis(guanidinium) ligand self-assembled in situ through imine condensation of simple components. The resulting crystalline salt has an exceptionally low aqueous solubility, on a par with BaSO4. Single-crystal X-ray diffraction analysis revealed pairs of sulfate anions clustered together with four water molecules within the crystals.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1235002
Journal Information:
Chemistry - A European Journal (Online), Vol. 21; ISSN 1521-3765
Publisher:
ChemPubSoc Europe
Country of Publication:
United States
Language:
English