ABSTRACT

Bauxite Residue (BR) is an industrial waste generated by the extraction of alumina through the Bayer process. It is usually stored in specially constructed sedimentation ponds. Long-term storage notoriously leads to severe environmental issues due to its high alkalinity which affects neighboring communities. It contaminates phreatic and surface waters through the infiltration of metal laden caustic solution and radionuclides. The air also gets polluted through dispersion of particles which threatens surrounding biodiversity. To manage these environmental concerns, it is necessary to engineer the waste residue into value added products. This paper systematically reviews the mineralogical and chemical characterization of the waste and techniques developed for its recycling.

摘要

铝土矿残渣（BR）是通过拜耳法提取氧化铝时产生的工业废物。通常储存在专门建造的沉淀池中。由于其高碱度影响邻近社区，长期储存会导致严重的环境问题。它通过富含金属的苛性碱溶液和放射性核素的渗透污染潜水和地表水。空气还因颗粒扩散而受到污染，威胁到周围的生物多样性。为了解决这些环境问题，有必要将废渣转化为增值产品。本文系统地回顾了废物的矿物学和化学特征以及为其回收利用开发的技术。