Saline waters from underground coal mines in Poland often contain natural radioactive isotopes, mainly 226Ra from the uranium decay series and 228Ra from the thorium series. More than 70% of the total amount of radium remains underground as radioactive deposits due to spontaneous co-precipitation or water treatment technologies, but several tens of MBq of 226Ra and even higher activity of 228Ra...

Sulfide oxidation is a common phenomenon associated with many mined ore bodies and extracted or processed waste. Where the products of these chemical reactions can enter a water body the result is often a reduction in water quality through the increase of acidity, metals and dissolved salts. Due to an attributed lower environmental impact the release of sulfate has received little attention in ...

Abstract This paper presents the main aspects of changing coal mining technology based on introduction underground gasification for mining-geological conditions occurrence State Enterprise “Lvivvuhillia” seams example “Chervonohradska” mine. When conducting analytical studies using “Material-heat balance gasification” software, predictive quantitative-qualitative indicators injected blast mixtu...

An important, but largely neglected hydrogeological issue is the timing of mine water sampling during mining and after mine closure. Significant temporal and spatial changes in the “ageing“ of information, neglected effects of dynamic changes in the quality of mine water and its resources are causing severe degradation of information from mine water analyses and their possible misleading interp...

Abstract The possibility of estimating groundwater inflow to irrigation drains in Minia, Egypt, using stable isotopes has been explored. The evaporation pan technique described here makes use of small variations in the concentration of naturally occurring stable isotopes (oxygen-18 and deuterium) in irrigation-fed groundwater and surface water as well as agricultural drainage water. The agreeme...

One of the biggest challenges in managing cold water streams in the Midwest is understanding how stream temperature is controlled by the complex interactions among meteorologic processes, channel geometry, and ground water inflow. Inflow of cold ground water, shade provided by riparian vegetation, and channel width are the most important factors controlling summer stream temperatures. A simple ...

A major drawback of separate sewer systems is the occurrence of illicit connections: unintended sewer cross-connections that connect foul water outlets from residential or industrial premises to the storm water system and/or storm water outlets to the foul sewer system. The amount of unwanted storm water in foul sewer systems can be significant, resulting in a number of detrimental effects on t...

The present study aims firstly at determining the microbial diversity of mine-water collected in Emalahleni, South Africa and secondly isolating and characterizing the most dominant bacterial species found in the mine water in terms of its resistance to both V(5+) and Ni(2+) in a modified wastewater liquid media. The results revealed a microbial diversity of 17 orders, 27 families and 33 genera...

There are many karst collapse columns in coal seam roof the southern field China, which different from those floor northern field, due to stratum characteristics. The column tends reactivate and conduct water induce serious inrush disaster, when communicates with overlying aquifer. In order reveal evolution mechanism of water-conducting channel mining area southwest aquifers inflow rule 1908 wo...