Iron(II) should be oxidised to iron(III) before the neutralisation of acid
water with limestone, otherwise the oxidation will occur downstream of the
neutralisation plant with the formation of acid (reactions 1 and 2). This s
tudy aimed at investigating the effect of surface area of the medium that s
upports bacterial growth on the rate of biological iron(II) oxidation. The
study showed that the biological iron(II) oxidation rate is directly propor
tional to the square root of the medium specific surface area. (C) 1998 Pub
lished by Elsevier Science Ltd. All rights reserved.