Sulphate removal from mine water by precipitation as ettringite was investigated.
Mine water sulphate concentration was reduced by 85–90% from initial 1400 mg/l.
Precipitated solids were further tested for arsenate removal from model solution.
86–96% of initial 1.5 mg/l arsenate was removed with 1 g/L sorbent dosage.
Results indicate ettringite precipitate from mine water could use as As(V) sorbent.