Application of a Gas-Liquid Entraining Rotor to Supercritical Fluid Extraction: Removal of Iron (III) From Water

Published

May 1, 2003

Author(s)

W C. Andersen, Thomas J. Bruno

Abstract

In this study, the ability of a new gas-liquid entraining device was investigated to improve the supercritical fluid extraction efficiency of iron removal from water. Metal beta-diketonate complexes with sufficient solubility in supercritical C02 are often poorly extracted from aqueous solutions due to limited mass transferbetween the water-soluble metal ions and the C02-soluble chelating agent. The new entraining device maximizes contact between the ligand-rich C02 phase and the metal ion-rich aqueous phase. Iron (111) was extracted from water with the chelating agent 2,2,7-trimethyl-3,5-octanedione and supercritical C02 at 60 degrees C and 20.8 MPa. With entrainment, 78.6 percent of the iron was removecfrom the aqueous phase. This represents a three-fold increase in ironextraction efficiency over the static system.

Citation

Analytica Chimica Acta

Volume

485

Issue

No. 1

Pub Type

Journals

Keywords

2, 2, 7-trimethyl-3, 5-octanedione, carbon dioxide, gas-liquid entrainment, iron (III), supercritical fluid extraction

Citation

Andersen, W. and Bruno, T. (2003), Application of a Gas-Liquid Entraining Rotor to Supercritical Fluid Extraction: Removal of Iron (III) From Water, Analytica Chimica Acta (Accessed April 25, 2024)