On the hydrolysis of the Dysprosium(III) ion

Authors: Vasca, Ermanno; Ferri, Diego; Manfredi, Carla; Fantasma, Francesca; Caruso, Tonino; Fontanella, Cecilia; Vero, Stefania

Source: Chemical Speciation and Bioavailability, Volume 16, Numbers 1-2, February 2004 , pp. 71-77(7)

Publisher: Science Reviews 2000 Ltd

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Abstract:

The hydrolysis of the Dysprosium (III) (Dy³⁺) ion has been investigated at 25°C in 1, 2 and 3 molal (Na)ClO₄ medium through a combined potentiometric-coulometric methodology. At each perchlorate concentration the formation constants of the complexes DyOH²⁺, Dy₂(OH)₂⁴⁺ and Dy₅(OH)₉⁶⁺ have been determined. The values have then been extrapolated to zero ionic strength by using the Specific Interaction Theory. Analogies with the hydrolysis mechanism of other lanthanides are pointed out.

This paper is just the first to be reported of a series of studies undertaken with the aim to prove that a single mechanism of hydrolysis applies to all the trivalent lanthanides and probably to the corresponding actinides, too radioactive to be investigated directly.

Keywords: Dy3+ ion; hydrolysis; potentiometry; coulometry; Specific Interaction Theory

Document Type: Research article

DOI: http://dx.doi.org/10.3184/095422904782775135

Affiliations: 1: Dipartimento di Chimica, Università di Salerno, Via Salvador Allende, 43 - 84081 Baronissi (SA), Italy

Publication date: 2004-02-10

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Chemical Speciation & Bioavailability covers a rapidly expanding area in environmental science.
Research on the interactions between the chemical forms and behaviour of toxic compounds and their subsequent biological uptake, metabolism and ecological fate involves many scientific fields. These studies are often published in discipline-specific journals, leading to inadequate review and information scatter. This situation hinders both the development of an international community of experienced colleagues and the open flow of information and discussion. Additionally, the importance of speciation and bioavailability research to the development of pollution law and control technologies is being increasingly appreciated by environmental regulatory agencies throughout the world.
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On the hydrolysis of the Dysprosium(III) ion

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