The concentration of heavy metals in soils of Baia Mare is very significant due to the high values of the contents and association of these four metals Pb, Cu, Zn, Cd.
Overburden and waste rock piles and dumps, tailing ponds, oil and gas wells and produced water ponds occupy considerable areas of land, especially large open pit mines. Most mining wastes, such as overburden, are inert solid materials; they do not represent a significant pollution threat to the environment, but they do cause erosion, fertile land loss and ecosystem and landscape disruption. However, other fractions, in particular those generated by the non-ferrous metal mining industry, may contain large quantities of dangerous substances (inherently present in the ore or added during extraction) and generate acid or alkaline drainage which, during raining periods, exceeds the volume that can be treated in the wastewater treatment plant, leading to contamination of the soil, groundwater and rivers.
Cuprom area pollution
Name of Site: Cuprom LLC, a subsidiary of Bitmine SRL ( wholly-owned by Terra Resources LLC)
Location: Baia Marea, Maramures, Romania
Polluting Activity: Copper production, Metallurgical Extraction
Pollutants: Sewage, Sludge, Acidic Solutions and Heavy Metals
Contaminated area: 58 ha
Decontamination of soil and water can be achieved with phytoremediation. The ecological restoration of Cuprom will contribute to improving the environment and biodiversity. It will involve the following techniques: