REMOVAL OF METALS FROM DILUTE MINE WATER
Our adsorbent products designed for removing soluble metals remove harmful free ions from the water, whether it is the drainage water or water from the gangue area. The removal efficacy can be adjusted by altering the adsorbent dosage and the retention time. See the existing environmental quality standards valid in Finland from e.g. Finlex: http://www.finlex.fi/fi/laki/alkup/2010/20100868
The products can also be used for improving the efficiency of metal removal with regular hydroxide precipitation (lime milk precipitation).
The advantage of the adsorbents manufactured by Aquaminerals is that they work in a wide pH range. As such, there is no need for separate pH adjustment. In addition, the saturated adsorbent deposits are stable and do not dissolve.
REMOVAL OF AMMONIUM NIROGEN FROM MINE WATER FRACTIONS
Mining blast residues are the most common source of soluble nitrogen compounds. Aquaminerals’ nitrogen removers work in cold water as well, and it is not interfered by heavy metals.
Nitrogen-specific adsorbent products can be regenerated, and they work without organic matter (in comparison to biological purification).
Stricter environmental permit conditions require more effective methods of reducing the sulphate load of waste water.
The usual cleaning methods, such as gypsum precipitation, only remove part of the load.
Ask our experts for a solution for removing sulphate.