Influence of organic waste and residue mud additions on chemical,physical and microbial properties of bauxite residue sand |
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Authors: | Benjamin E H Jones Richard J Haynes Ian R Phillips |
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Institution: | (1) School of Land, Crop and Food Sciences/CRC CARE, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia;(2) Alcoa of Australia Ltd, PO Box 172, Pinjarra, WA, 6208, Australia; |
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Abstract: | Background, aim and scope In an alumina refinery, bauxite ore is treated with sodium hydroxide at high temperatures and pressures and for every tonne
of alumina produced, about 2 tonnes of alkaline, saline bauxite processing waste is also produced. At Alcoa, a dry stacking
system of disposal is used, and it is the sand fraction of the processing waste that is rehabilitated. There is little information
available regarding the most appropriate amendments to add to the processing sand to aid in revegetation. The purpose of this
study was to investigate how the addition of organic wastes (biosolids and poultry manure), in the presence or absence of
added residue mud, would affect the properties of the residue sand and its suitability for revegetation. |
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