Agrawal, A and Kumari, S and Sahu, K K (2011) Studies on solvent extraction of iron(III) as a step for conversion of a waste effluent to a value added product. Journal of Environmental Management, 92 (12). pp. 3105-3111.
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Solvent extraction of iron(III) from actual sulphate waste pickle liquor was investigated using trialkylphosphine oxide diluted with kerosene. The waste pickle liquor was procured from a local company which deals with the manufacturing of pipes and tubes made of iron and steel. Various parameters were studied to optimise a suitable condition for the maximum extraction of iron. The composition of the aqueous feed used in the experiment was 60.88 g/L Fe(III), 53 g/L acid with traces of Cu, Ni and Co. An ambient extraction at 30 °C yielded acceptable kinetics and loading efficiency for 40% trialkylphosphine oxide with a saturated loading capacity of 51.85 g/L in four contacts at O/A ratio of 1/1 in a multiple contact mode. Iron from the loaded organic was stripped using various strippants such as distilled water, H2SO4 and oxalic acid. Since only 32% of loaded Fe could be stripped with 2 M H2SO4 in five contacts, further stripping was done with 5% oxalic acid which showed a very promising result. It was found that almost 100% of Fe(III) could be stripped out with 5% oxalic acid at O/A of 1/1 in five contacts.
|Uncontrolled Keywords:||Waste pickle liquor; Trialkylphosphine oxide; Solvent extraction; Iron extraction|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Dr. A K Sahu|
|Deposited On:||26 Sep 2011 13:38|
|Last Modified:||21 Nov 2011 11:53|
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