Electroacoustic Isoelectric Point Determinations of Bauxite Refinery

Jul 11, 2012 - School of Environment Science and Engineering, Southern Cross University, P.O. ... contains gibbsite (Al(OH)3), diaspore (ß-AlOOH), bo...
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Electroacoustic Isoelectric Point Determinations of Bauxite Refinery Residues: Different Neutralization Techniques and Minor Mineral Effects Tiago S. S. Freire,† Malcolm W. Clark,*,† M. Josick Comarmond,‡ Timothy E. Payne,†,‡ Amanda J. Reichelt-Brushett,†,§ and Gordon J. Thorogood‡ †

School of Environment Science and Engineering, Southern Cross University, P.O. Box 157, Lismore, NSW 2480, Australia Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia § The Marine Ecology Research Centre (MERC), Southern Cross University, P.O. Box 157, Lismore, NSW 2480, Australia ‡

S Supporting Information *

ABSTRACT: Bauxite refinery residue (BRR) is a highly caustic, iron hydroxide-rich byproduct from alumina production. Some chemical treatments of BRR reduce soluble alkalinity and lower residue pH (to values