The invention solves the problems of inefficiency which usually shows the conventional passive treatment systems. The reactive fills developed for the removal of inorganic contaminants historically have focused on removing low concentrations of these (typical features of coal mining), however when these fillers are faced to high concentrations of metals (sulfur mining, uranium, industrial water waste…) quickly clogging and loss of reactivity occurs. The present invention allows the removal of metals without clogging and/or loss of reactivity. This is achieved by the use of a coarse inert material with high surface mixed with a fine-grained reactive material, so that the surface of the inert material is breaded with reactive material. Coarse fragments of inert material act as a frame, providing large pores that reduces clogging by precipitates. The small particle size of the reactive material provides a large surface area that increases its reactivity.
Description of the technology
The present invention relates to a process for purifying contaminated waters by metals, such as acid mine drainage, and to the installation for implementing the procedure. Consists of a series of processes that cause oxidation, neutralization and precipitation of the metal components which contaminate the water, so that water is free of metals finally. The invention allows the removal of metals sustainably, without continuous addition of chemical reagents and without use of energy.
Specifications
The most relevant feature of this technology is the reactive material developed which is at the same time permeable and reactive, and also has the property that when it starts to lose its primary porosity by void filler develop a secondary porosity by dissolution of the reactive material.
Main advantages of its use
Applications
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