scholarly journals Geospatial Assessment of the State of the Samara River Floodplain in the Area of Coal Mining in Western Donbas

Agrology ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 93-97
Author(s):  
М М. Kharytonov ◽  
V. T. Pashova ◽  
S. M. Lemyshko ◽  
G. P. Yevgrashkina ◽  
O. V. Titarenko
Keyword(s):  
Mine Water ◽  
Mine Drainage ◽  
Water Discharge ◽  
Monitoring Network ◽  
Satellite System ◽  
The State ◽  
Self Healing ◽  
Mine Waters ◽  
River Floodplain ◽  
Artificial Ponds

The discharge of highly mineralized mine waters of the Western Donbass negativelyaffected the Samara Bay area, which is of great fishery importance. Mine water storage pondswere built in deep erosional cuts in the territories of mine fields in the gullies of Kosminnaya,Taranova, Glinyana and Svidovok. The screening of the bottoms was not performed in any pond.The soils that make up the bottom are not aquicludes, which contributes to intensive filtration ofmine waters and pollution of aquifers. Artificial ponds built without waterproofing of bottoms,rock dumps, mine water discharge routes and other sources of pollution are actively involved inthe zone of influence of mine drainage and worsen the quality of drinking water, the reserves ofwhich in the Western Donbass are limited. There is flooding and flooding by groundwater, as wellas increasing (compared to the period before the violations) areas of land temporarily floodedduring floods on rivers in the valleys of the rivers Samara, Velyka Ternivka and such large beamsas Svydovok, Taranova, Kosminna due to subsidence of the earth’s surface. Differences in theconditions of formation of mine waters determine the nature and degree of their impact on theenvironment. The main difficulties making complicated accurate comparison between calculatedand field data in Samara river floodplain are following: a) changes in parameters of mining andpumping rates of water used for local needs; b) hydrological changes including formation ofnew channels, bed deformation; c) transformation of the monitoring network; d) increasing leakagethrough the clayey bottom of the ponds. The main objective is to provide a comprehensivegeo-ecological assessment of the state of the Samara river floodplain in the area of coal miningin the Western Donbass. Multispectral imagery of Sentinel-2 satellite system was used for remoteassessment within the study area. Geomorphologic assessment of the studied area was performedusing Sentinel-1 satellite radar interferometry. Flooding of the territory is observed due to minedrainage and subsidence of the earth’s surface. The risk of salinization of soils under the conditionsof water use from the beam “Glynyana” and from the Samara river is estimated as insignificant,from the beam “Kosminna” ‒ average. The SAR value of mine waters in “Taranova” and“Svydovok” beams corresponds to a high level of salinity. Samara river waters belong to the 3rdclass and are characterized as highly mineralized, sometimes unsuitable for irrigation. Intensivenatural overgrowth of the mine dumps that have passed the stage of mining reclamation has beenrecorded near the “Heroyiv of Space”, “Pavlogradska” and “Samarska” mines. The rate of selfgrowthof the land cover around the mine “Ternovska” and “Blagodatna” is estimated as average.The self-healing levels of the “Ternovska” and “Blagodatna West Donbasska” mines are ratedfrom low to high. The greatest risk of salinization of soils under conditions of use of water forirrigation is possible at a fence from artificial ponds located in Taranov’s and Svidovok’s beams.The conturs of “Verbsky”, “Ternivsky”, “Bogdanovsky” and “Boguslavskiy” piscicultural pondscan be corrected with map of remote sensing of Samara river floodplain geomorphology. The dataobtained can be useful during development of econetwork of promising ecological corridors inthe floodplain part of the Samara River as well..

scholarly journals Design of coal mine drainage system

2019 ◽  
Vol 76 ◽  
pp. 04006
Author(s):  
Waterman Sulistyana Bargawa ◽  
Agus Panca Adi Sucahyo ◽  
Hesti Farra Andiani
Keyword(s):  
Mine Water ◽  
Catchment Area ◽  
Mine Drainage ◽  
Water Discharge ◽  
Drainage System ◽  
Research Area ◽  
Water Volume ◽  
Runoff Water ◽  
Volume Calculation ◽  
Settling Pond

Research from coal fields show that increased production from coal mines resulted in a wider pit. Changes in the water catchment area resulted in changes in the calculation of mine water volume. Excessive mine water volume affects mining activities. Large amounts of water in the pit causes disruption in excavation and loading and hauling activities. Therefore, the design of mine drainage systems is required. The purpose of the study is to analyse statistically the parameters of the mine drainage system, and to design the mine drainage system; including open drain, sump, and settling pond. The research tools used include the calculation of runoff water discharge that requires statistical analysis for rainfall data processing and the determination of catchment area (CA). The open channel dimension and settling pond design is based on the sump volume calculation. The research area has high rainfall clased for the particle to settle is 30.38 minutes. The percsification, solid percent 2.66 % with settling rate 0.0027 m/s; the time requirentage of theoretically suctioned particle is 83 %, and the settling pond maintenance time that has 4 compartments is 15, 16, 19, and 23 days.

scholarly journals Heavy metal ions adsorption from mine waters by sawdust

2009 ◽  
Vol 15 (4) ◽  
pp. 237-249 ◽  
Author(s):  
Velizar Stankovic ◽  
Dragana Bozic ◽  
Milan Gorgievski ◽  
G. Bogdanovic
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Mine Water ◽  
Heavy Metal Ions ◽  
Mine Drainage ◽  
Copper Ions ◽  
Supporting Electrolyte ◽  
Mine Waters ◽  
Copper Mine ◽  
Column Adsorption

In this work the results on the batch and column adsorption of copper and some associated ions by employing linden and poplar sawdust as a low-cost adsorbent are presented. The mine water from a local abandoned copper mine, as well as synthetic solutions of those ions which are the main constituents of the mine water were both used as a model-system in this study. The adsorption ability of the chosen sawdust to adsorb heavy metal ions is considered as a function of the initial pH of the solution and kind of metal ions. At lower pH of solutions the adsorption percentage (AD %) decreases leading to a zero AD % at pH < 1.1. Maximum AD % is achieved at 3.5 < pH < 5. It was found that poplar and linden sawdust have both almost equal adsorption capacities against copper ions. The highest AD % ( ?80%) was achieved for Cu2+, while for Fe2+ it was slightly above 10%. The other considered ions (Zn2+ and Mn2+) were within this interval. The results obtained in the batch mode were verified through the column test by using the real mine water originating from an acid mine drainage (AMD) of the copper mine 'Cerovo', RTB Bor. The breakthrough curves are presented as a function of the aqueous phase volume passed through the column allowing having an insight into the column adsorption features. Breakthrough points were determined for copper, manganese and zinc ions. A very high adsorption degree - higher than 99% was achieved in these experiments for all mentioned ions. After completing the adsorption, instead of desorption, the loaded sawdust was drained, dried and burned; the copper bearing ash was then leached with a controlled volume of sulphuric acid solution to concentrate copper therein. The obtained leach solution had the concentration of copper higher than 15 g dm-3 and the amount of H2SO4 high enough to serve as a supporting electrolyte suitable to be treated by the electrowinning for recovery of copper. The technology process based on the column adsorption is proposed and discussed.

scholarly journals Nanofiltration of Mine Water: Impact of Feed pH and Membrane Charge on Resource Recovery and Water Discharge

Membranes ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 163-180 ◽  
Author(s):  
Mark Mullett ◽  
Roberta Fornarelli ◽  
David Ralph
Keyword(s):  
Mine Water ◽  
Water Discharge ◽  
Resource Recovery ◽  
Water Impact ◽  
Membrane Charge

scholarly journals MIGRACE RADIONUKLIDU 226Ra V SEDIMENTECH RYCHVALDSKÉ STRUŽKY

2018 ◽  
Vol 25 (1-2) ◽  
Author(s):  
Radek Morcinek ◽  
Josef Zeman
Keyword(s):  
Mine Water ◽  
Treatment Plant ◽  
Geochemical Evolution ◽  
Mining District ◽  
Coal Basin ◽  
Mine Waters ◽  
Upper Silesian Coal Basin ◽  
Substantial Risk ◽  
Mass Activity ◽  
Increased Activity

Large amounts of mining waters are discharged into waterstreams in the region of Ostrava-Karviná Mining District. This paper deals with discharged mine water from the Žofie watershaft , which is located in Petrvald basin in Czech part of Upper Silesian coal basin. Mine water may affect surface watercourses, especially their sediments, which may have increased activity of radium 226Ra. The aim of this work was to evaluate geochemical evolution of the Rychvald creek with regard to the mobility of radium 226Ra and estimate the degree of influence. From the results, it is evident that the mine waters significantly affect the composition of Rychvald creek. Increased equivalent dose was measured only up to the wastewater treatment plant, which probably considerably diluted the water, consequently diminishing migration abilities of radium. From the result of physicochemical parameters it is evident that discharged mine water from the Žofie watershaft affects mainly conductivity, due to high mineralization of discharged mine water. Increased doses of the gamma radiation equivalent, which are related to the increased mass activity of radium 226Ra, were found in the sediment of the first 1 200 m of the Rychvaldské creek. However the determined increased activities of radium 226Ra do not represent neither substantial risk for human health nor important risk for the environment.

Self-healing organic coatings based on microcapsules – A patent-based review

2021 ◽  
Vol 04 ◽  
Author(s):  
Diego Moreira Schlemper ◽  
Sérgio Henrique Pezzin
Keyword(s):  
Corrosion Protection ◽  
State Of The Art ◽  
Review Article ◽  
The State ◽  
Organic Coatings ◽  
Self Healing ◽  
Future Challenges ◽  
The Matrix ◽  
Healing Agent

: Self-healing coatings are intended to increase long-term durability and reliability and can be enabled by the presence of microcapsules containing a self-healing agent capable of interacting with the matrix and regenerating the system. This review article provides an overview of the state-of-the-art, focusing on the patents published in the field of microcapsule-based self-healing organic coatings, since the early 2000’s. A discussion about coatings for corrosion protection and the different self-healing approaches and mechanisms are also addressed, as well as future challenges and expectations for this kind of coatings.

Peculiarities of Interaction of Underground and Surface Water in Zones of Disjunctive Tectonic Faults (on the Example of Eastern Donbass)

2021 ◽  
pp. 81-87
Author(s):  
Grigory Yu. Sklyarenko ◽  
Vladimir E. Zakrutkin ◽  
Eugeny V. Gibkov
Keyword(s):  
Surface Water ◽  
Surface Waters ◽  
Mine Water ◽  
Social Situation ◽  
Geological Structure ◽  
Mine Waters ◽  
Tectonic Faults ◽  
Treatment Facilities ◽  
Network Studies ◽  
Fault Displacement

Eastern Donbass, where coal has been mined for over a century, has become a natural-technogenic system (NTS), affecting all components of the natural environment. Among the elements most affected by it are groundwater and surface water exposed to mine waters. The state of the NTS is due to the interaction of technogenic and natural factors such as the geological structure of the territory. For many years, the environmental assessment has taken into account the organized discharge of mine water. At the same time, this region is characterized by widespread development of disjunctive tectonic faults. The hypothesis seems logical that not only the treatment facilities of closed coal mining enterprises, but the faults and associated fracture zones are channels for the drainage of mine water and deep highly mineralized solutions to the surface, where they are unloaded into the river network. Studies carried out in one of the promising areas, where drainage of groundwater takes place through fractured rocks developed along the fault displacement fault, showed their significant impact on the composition of the surface waters of the river Small Nesvetay. Taking into account the very complex tectonics of the Eastern Donbass, it would be logical to assume a similar influence of other numerous disjunctive structures. Their study will contribute to a comprehensive assessment of the region&#x27;s environment and the adoption of management decisions, and the development of effective measures for water purification and stabilization of the ecological and social situation in the region.

scholarly journals Removal of Metals by Sulphide Precipitation Using Na2S and HS−-Solution

2020 ◽  
Vol 4 (3) ◽  
pp. 51
Author(s):  
Hanna Prokkola ◽  
Emma-Tuulia Nurmesniemi ◽  
Ulla Lassi
Keyword(s):  
Mine Water ◽  
Mine Drainage ◽  
Anaerobic Treatment ◽  
Reduction Reaction ◽  
Sulphate Reduction ◽  
Acidic Mine Drainage ◽  
Acid Mine Water ◽  
Metal Hydroxides ◽  
Sulphide Precipitation ◽  
Ph Dependent

Precipitation of metals as metal sulphides is a practical way to recover metals from mine water. Sulphide precipitation is useful since many metals are very sparingly soluble as sulphides. Precipitation is also pH dependent. This article investigates the precipitation of metals individually as sulphides and assesses which metals are precipitated as metal hydroxides by adjustment of the pH. The precipitation of different metals as sulphides was studied to determine the conditions under which the HS− solution from the sulphate reduction reaction could be used for precipitation. H2S gas and ionic HS− produced during anaerobic treatment could be recycled from the process to precipitate metals in acidic mine drainage (AMD) prior to anaerobic treatment (Biological sulphate reduction), thereby recovering several metals. Precipitation of metals with HS− was fast and produced fine precipitates. The pH of acid mine water is about 2–4, and it can be adjusted to pH 5.5 before sulphide precipitation, while the precipitation, on the other hand, requires a sulphide solution with pH at 8 and the sulphide in HS− form. This prevents H2S formation and mitigates the risk posed from the evaporation of toxic hydrogen sulphur gas. This is a lower increase than is required for hydroxide precipitation, in which pH is typically raised to approximately nine. After precipitation, metal concentrations ranged from 1 to 30 μg/L.

scholarly journals Records and breeding sites of the Least Grebe (Tachybaptus dominicus) in Zacatecas

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
Noé Pérez-Valadez
Keyword(s):  
The State ◽  
Breeding Sites ◽  
Artificial Ponds ◽  
And Behavior ◽  
First Time ◽  
Migratory Waterbirds ◽  
Important Habitat

I recorded the Least Grebe (Tachybaptus dominicus) for the first time in the state of Zacatecas on March 2012. Since then I haveobserved this species in different sites within the municipality of Nochistlán de Mejía, southwestern Zacatecas. Additionally, inMay, July, September, and October 2014 four breeding sites were located in artificial ponds, one of them with a nest with threeeggs. Artificial ponds, locally known as “bordos”, are important habitat not only for the Least Grebe, which is at the category ofspecial concern according to the Mexican law nom-059-SEMARNAT-2010, but also for other resident and migratory waterbirds such as ducks. Even when the Least Grebe has been recorded in the states of Aguascalientes and Jalisco, there is no information for the state of Zacatecas. In this paper, I report information about records, breeding sites, and behavior of this species in the municipality of Nochistlán de Mejía.

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