PaperSeparation of several oxoanions with a special chelating resin containing methylamino-glucitol groups

Add time:08/31/2019    Source:sciencedirect.com

Certain oxoanions form complexes with polyols if the hydroxy groups have a sterically favoured position. Similar properties were found for the chelating resin Wofatit MK 51 which contains methylamino-glucitol groups. The sorption and desorption behaviour of this resin for aluminate, gallate, germanate, plumbate, vanadate, chromate, and molybdate was studied. In all cases, except chromium, the selective separation of these oxoanions is possible, even from strongly mineralized solutions. The elution was performed by means of hydrochloric acid because the complexes are not stable in acidic environment. In the case of molybdate, alkali hydroxide solutions were suitable for stripping. The breakthrough and elution curves will be discussed and the breakthrough capacities were calculated.

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