Original scientific paper

Precipitation and Complex Formation of Zirconium(IV) with Malonic, Succinic and Adipic Acids at 298 K

Halka Bilinski ; »Ruder Boskovic« Institute, Zagreb, Croatia, Yugoslavia
Nevenka Brničević ; »Ruder Boskovic« Institute, Zagreb, Croatia, Yugoslavia

Abstract

Using the tyndallometric technique, the precipitation of zirconium(
IV) from aqueous solution of zirconyl chloride (1 mM) was
investigated, in the presence of dicarboxylic acids: malonic, succinic
and adipic, at pH 2-10 and 298 K. In the precipitation diagram
only one region at pH < 2 exists in which zirconium is water-
soluble with these acids. Polymeric, insoluble compounds of the
composition Zr(OH)3HA (A = malonate, succinate, adipate ligands)
were isolated at 2 < pH< 3. At pH> 3 continuous increase of
zirconium percentage in precipitate with pH increasing was observed
in all samples, due to zirconium hydroxide coprecipitation

Keywords

Hrčak ID:

194240

URI

https://hrcak.srce.hr/194240

Publication date:

15.4.1983.

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