ReviewHydrotalcites and their role in coordination of anions in Bayer liquors: Anion binding in layered double hydroxides
Section snippets
Bayer process – origin of red mud
Bauxite refinery residues are derived from the Bayer process, summarised in Eqs. (1), (2), and (3) [1], by the digestion of crushed bauxite in concentrated caustic (NaOH) at elevated temperatures. Digestion temperatures are dependent on the quantity of gibbsite (γ-Al(OH)3), boehmite (γ-Al(O)OH), and diaspore (α-Al(O)OH) present in the bauxite ore. Bauxites containing predominantly gibbsite require lower digestion temperatures (145–175 °C), while those with high boehmite and diaspore require
Summary
Seawater neutralisation of bauxite refinery residues has been employed in recent years to reduce the pH and dissolved metal concentrations of wastewater, through the precipitation of hydrotalcite-like compounds and some other Mg, Ca, and Al hydroxide and carbonate minerals. These hydrotalcite-like compounds remove oxy-anions of transition metals through a combination of intercalation and adsorption of the anionic species on the external surfaces. Seawater neutralisation of bauxite refinery
Acknowledgements
The financial and infra-structure support of the Queensland Research and Development Centre (QRDC-Alcan) and the Queensland University ofTechnology Inorganic Materials Research Program of the School of Physical and Chemical Sciences is gratefully acknowledged. One of the authors (SJP) is grateful to Alcan for a Masters scholarship.
References (244)
- et al.
Colloids Surf. A: Physicochem. Eng. Aspects
(1999) - et al.
Colloids Surf. A: Physicochem. Eng. Aspects
(2001) - et al.
Min. Eng. Process. Disp. Min. Ind. Waste
(2004) - et al.
J. Colloid Interface Sci.
(2003) - et al.
Agric. Ecosyst. Environ.
(1997) - et al.
Waste Manage.
(2002) - et al.
Environ. Pollut.
(2002) - et al.
Electrochem. Methods Corros. Res.
(2004) - et al.
Water Res.
(1998) - et al.
J. Hazard. Mater.
(2006)
Hydrometallurgy
Geochimica et Cosmochimica Acta
Hydrometallurgy
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
Colloids Surf.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta
Hydrometallurgy
Hydrometallurgy
Catal. Today
Colloids Surf. A: Physicochem. Eng. Aspects
Microporous and Mesoporous Mater.
J. Cryst. Growth
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
J. Colloid Interface Sci.
Water Res.
Geochimica et Cosmochimica Acta
J. Min. Met. Mater. Soc.
Aust. J. Soil Res.
J. Environ. Qual.
Chemica
Environ. Eng. Sci.
Anal. Bioanal. Chem.
Aust. J. Soil Res.
Pedosphere
Chemica
Cited by (195)
Enhanced sequestration of CO<inf>2</inf> from simulated electrolytic aluminum flue gas by modified red mud
2023, Journal of Environmental ManagementChloride intercalated Ni-Al layered double hydroxide for effective adsorption removal of Sb(Ⅴ)
2022, Inorganic Chemistry Communications