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N-(2-hydroxyethyl)ethylenediamine-N,N′,N′-triacetic acid (HEDTA) is an alternative chelator similar to ethylenediaminetetraacetic acid (EDTA) which is commonly used for metal–ion removal. Because of the introduced asymmetry in the HEDTA ligand, more than one coordination complex can form. The interaction between HEDTA and vanadate has been studied by 1D and 2D, 51V, 13C, and 1H NMR spectroscopies...
In this study, phenomena behind recovery of Re by weak anion exchangers from sulfate solutions containing Mo and As as impurities were investigated. All the metals exist as different kinds of oxyanions or, at some conditions, cations, meaning that several phenomena need to be taken into account. Batch uptake kinetics and dynamic breakthrough experiments were conducted with three commercial resins,...
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