Acid Mine Drainage Treatment Using Bayer Precipitates Obtained from Seawater Neutralization of Bayer Liquor.

ABSTRACT: Bayer precipitates from the seawater neutralization of Bayer liquor waste from the alumina industry are shown to be a prospective solution for the remediation of acid mine drainage (AMD) water. Precipitates are varied in composition, albeit they are generally comprised of hydrotalcite (Mg₆Al₂(OH)₁₆CO₃∙xH₂O), calcite (CaCO₃), aragonite (CaCO₃), mixed metal hydroxides (Mg₂Al(OH)₇), and halite (NaCl). Brucite (Mg(OH)₂) is detected for lower Bayer liquor concentrations (1-3 g L^-1 Al₂O₃) when the concentrations of aluminum and hydroxyl species are insufficient to promote hydrotalcite formation. The neutralizing capacity of the precipitates also va

SUBMITTER: Kaur G 

PROVIDER: S-EPMC6607373 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature