Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate

Table 1

Chemical characterization of acid mine drainage solutions.

	A1	A2	Maximum limits for effluents discharge
Mn	102.6	92.3	1.0
Fe	2.8	0.8	15
Zn	3.2	2.8	5
Ni	0.1	0.2	2
Co	0.1	0.02	*
U	9.5	9.5	*
Ca	251.9	142.2	*
Al	194.8	176.2	*
Pb	0.1	<0.05	0.5
F^−	65.2	79.4	10
SO4^2−	1818	1230	*
TOC	1.5	2.4	*
pH	3.1	3.6	5.0 to 9.0

Concentrations of all components are in mg/L. *CONAMA Resolution 430 has no limits for these components [4].