Hydrobasaluminite precipitation in anoxic mine waters occurs by in situ neutralization and is promoted by microbial activity

Coprecipitation with hydrobasaluminite affects greatly the concentration of silica and many trace elements

Microbial cells present in the acidic waters act as nuclei for Al precipitation and promote further sorption of Fe(II) and Si

Hydrobasaluminite is metastable and tends to transform to more crystalline phases like gibssite, bayerite and/or allophane

The interaction of aluminum with dissolved silica may lead to the formation of aluminosilicates in acid mine waters