Selective recovery of heavy metals from hot-dip galvanising effluent streams by membrane-based solvent extraction Online publication date: Mon, 17-Dec-2007
by Sam Cook, Sandra Kentish, Jilska Perera, Geoff Stevens, Peter Hetherington
International Journal of Water (IJW), Vol. 3, No. 4, 2007
Abstract: The hot-dip galvanising process produces a large quantity of acidic effluent high in iron, zinc and chloride ions. The current method for disposal of the waste acid is to neutralise the remaining hydrochloric acid (HCl) to precipitate a worthless, environmentally harmful mixture of iron and zinc hydroxides that be disposed of to specialised landfill sites. The recovery of any of these species is of economic interest due to the minimisation of waste-transport costs and the recovery of saleable by-products. In this work, a membrane-based solvent extraction process is being developed for the selective recovery of zinc over iron. Using a laboratory scale hollow fibre contactor, the key operating parameters including feed and organic flow rates, as well as their position within the contactor (shell or tube-side), are being systematically analysed. The results of the project should provide sufficient process information to permit the construction of a pilot scale effluent treatment process.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Water (IJW):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com