Aluminium solubility and acidity

Aluminium is largely insoluble during weathering processes (Table 5.1), but becomes soluble when pH is both low and high. At the simplest level, three aluminium species are identified soluble Al , dominant under acid conditions, insoluble aluminium hydroxide (Al(OH)3), dominant under neutral conditions, and Al(OH)i, dominant under alkaline conditions. 

however, acidification of freshwaters that commonly results in aluminium mobility resulting in ecological damage. This acidification is typically caused by two anthropogenic processes, acid rain and acid mine drainage. 

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