Home
Resources
Publications
The Phosphine Oxides Cyanex 921 and Cyanex 923 as Carriers for Facilitated Transport of Chromium (VI)-chloride Aqueous Solutions

The Phosphine Oxides Cyanex 921 and Cyanex 923 as Carriers for Facilitated Transport of Chromium (VI)-chloride Aqueous Solutions

Francisco José Alguacil, Aurora López-Delgado, Manuel Alonso, Ana Maria Sastre

Chemosphere. 2004 Nov;57(8):813-9.

PMID: 15488572

Abstract:

The behaviour of the phosphine oxides Cyanex 921 and Cyanex 923 in the facilitated transport of chromium (VI) from chloride solutions is described. Transport is studied as a function of several variables such as stirring speeds of the aqueous phases, membrane phase diluent, hydrochloric acid concentration in the source phase and chromium and carrier concentrations. The separation of chromium (VI) from other metals presented in the source phase as well as the behaviour of phosphine oxides with respect to other neutral organophosphorous derivatives (tri-n-butylphosphate (TBP) and dibutyl butylphosphonate (DBBP)) are also investigated. Moreover, by using hydrazine sulphate in the receiving phase, Cr(VI) is immediately reduced to the less toxic Cr(III).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP78466	Dibutyl butylphosphonate		78-46-6	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: