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It is known that rhenium is easily accumulated in green leaves and plants, its amount in them exceeding many times its occurrence in the earth’s crust (7x10-8\%). We have established that rhenium is accumulated in the chlorophyll, preferably as Mg(ReO4)2. Laboratory experiments with green geranium (Pelargonium) planted in soil spiked with rhenium (1 mg Re per g of soil) reveal that in the first 7 days after the soil is spiked rhenium content in the leaves is 20 mg g-1 and after 21 days it is increased to 100 mg ...

During last decades a systematic effort is being carried out to assign monetary values on environmental assets. Environmental valuation methods namely the Contingent Valuation, the Travel Cost and the Hedonic Pricing are now well established approaches of benefit assessment. Yet, they have been little applied in relation to mining reclamation schemes. As a result, financial analysis is limited to monetary value derived from construction costs and revenues from commercial utilization of the site, e.g. when the area...

Mining and processing of natural resources is definitely exerting adverse impact upon the waters, soil and free air in the production areas. The hydraulic facilities for settling and decanting of metallurgical tailings, waste rock stockpiles, subsidences and polluted rain waters represent the agents of negative influence. Regretfully, the requisite measures aimed at the surface and sub-surface environment protection are behind time. The after-effect from mining activities will be reminiscent of the wounded nature ...

The report presents information for the National Balance of Subsurface Resources, its status at the beginning of year 2000, and the changes during 1999. Summarized are the results for the mining and processing of subsurface resources and its environmental impact. The objectives and the priorities of the Ministry of Environment and Water, considering the legislative basis and the liquidation of the consequences of research and mining activities, are also shortly described.

The Ministry of Environment and Waters is responsible for the State policy and strategy in the field of geology and prospecting, exploration and mining of the underground resources, and the environmental protection on the territory of the Republic of Bulgaria, the continental shelf and the exclusive economic zone in the Black Sea. The Ministry co-ordinate and assign the implementation of investment and other projects for geological and geoecological studies of the country. The Ministry with the other interested Mi...

Ground vibrations and air blasts are integral part of rock blasting and unavoidable. Depending on level of the stresses produced from wave motion, they cause damage to buildings structures in the nearby residents by causing dynamic stresses that exceed the strength of building material or rock material. So ground vibration effects induced by blasting on building structures and human beings need to be predicted, monitored and controlled. In other words, prediction of ground vibration components is of great importan...

Uranium mining and milling in the palaeozoic schists and intrusions in the Buhovo area N of Sofia started in 1946 and abruptly ended in 1990. In order to minimize adverse effects on the hydrosphere a complex water management system was developed. The main purpose of this water management system was to provide control- and monitoring tools, enabling the heirs of the defunct mining area to reduce the inherent risks of the different water sources on the affected population’s health. The areas of critical influence ...

Mines and floatation factories are great environmental contaminants. In the other branches of industry it is easier to organize a system of canals for contaminant media leading. Peculiarities of mining activities determine such purification process as a serious problem. Difficulties are connected with a proper choice of: Technological method for eliminated media purification; Means for environmental control; Methods for automation of purification processes. In this report the main contaminants eliminated from mine...