Seawater neutralization of alkaline bauxite residue and implications for revegetation

• Published in: Journal of environmental quality 2004-09, Vol.33 (5), p.1877-1884
• Main Authors: Menzies, N.W, Fulton, L.M, Morrell, W.J
• Format: Article
• Language: English
• Subjects: Agriculture; Agronomy. Soil science and plant productions; Alkalinity; aluminum hydroxide; Aluminum Oxide - chemistry; Applied sciences; Biological and medical sciences; Biotechnology; calcium; Calcium - chemistry; Calcium - isolation & purification; calcium hydroxide; Chemical analysis; Chemical Precipitation; chemical residues; Drainage; Drainage systems; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Environment and pollution; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Hydrogen-Ion Concentration; Industrial applications and implications. Economical aspects; irrigation water; land restoration; Leaching; magnesium; Magnesium - chemistry; Magnesium - isolation & purification; magnesium hydroxide; Marine; mine spoil; Neutralization; Plant growth; Pollution; Pollution, environment geology; potassium; Potassium - chemistry; Potassium - isolation & purification; Precipitation; processing residues; remediation; Residues; Revegetation; Seawater; Seawater - chemistry; soil nutrients; soil pollution; soil salinity; Vegetation; Water analysis; Water Supply
• ISSN: 0047-2425; 1537-2537
• DOI: 10.2134/jeq2004.1877

Reaction of bauxite residue with seawater results in neutralization of alkalinity through precipitation of Mg-, Ca-, and Al-hydroxide and carbonate minerals. In batch studies, the initial pH neutralization reaction was rapid (