Affiliation:
1. Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science School of Chemistry The University of Sydney Sydney NSW 2006 Australia
2. Research School of Chemistry Australian National University Canberra ACT 2600 Australia
Abstract
AbstractA simple, readily prepared biphenyl bis‐amidinium compound (1⋅Cl2) is able to selectively precipitate sulfate from water. The precipitant is effective at concentrations as low as 1 mM and shows complete selectivity against monovalent anions, and high selectivity even against CO32− and HPO42−. It is highly effective (>90 % sulfate removed) in both seawater and highly acidic conditions relevant to mining waste‐streams. X‐ray crystallography reveals that 1⋅SO4 forms a tightly packed, anhydrous, structure where each sulfate anion receives eight hydrogen bonds from amidinium N−H hydrogen bond donors.
Funder
Australian Research Council