Abstract
The feasibility of making ferrite at ambient temperature from solutions of simulated acid mine drainage is explored. The X-ray diffraction and saturation magnetization of the precipitates obtained clearly show that the spinel ferrite can be made at ambient conditions and pH 9−11. The optimum molar ratio of Fe3+ to Fe2+, a critical parameter for ferrite formation, is found to be 1.75. The effect of [Zn2+] and [Ca2+] in solution on ferrite formation was investigated. The former has no effect on the magnetic properties of ferrite, but the saturation magnetization of the ferrite decreases with an increase of [Ca2+]. The results suggest that an ambient temperature ferrite process for acid mine drainage is worthy of further investigation.
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