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Phosphorus removal using bauxite refining residue (red mud)

Ho, G.E. and Mathew, K. (1993) Phosphorus removal using bauxite refining residue (red mud). In: Proceedings of the 15th Federal Convention of the Australian Water and Wastewater Association, Vol.3, 18 - 23 April, Gold Coast, Qld, Australia pp. 607-613.

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The removal of phosphate-phosphorus from drain water using bauxite refining residue was investigated by conducting tests mixing phosphate solution with red mud, and red mud neutralized with phosphogypsum or copperas. Phosphate adsorption isotherms (24 h) followed Freundlich relationship with red mud amended with acidic calcium sulphate and ferrous sulphate having up to 18 times adsorption capacity compared to untreated red mud. Experiments contacting phosphate solution with red muds for 30 seconds followed by 24 h settling to simulate proposed removal of phosphate from drain water flowing to the Peel Harvey estuary in Western Australia indicate that up to 97% phosphate removal is achievable.

Publication Type: Conference Paper
Murdoch Affiliation: School of Environmental Science
Publisher: Institution of Engineers, Australia
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