Radium-226 Liberation from Uranium Ore Processing Mill Waste Solids and Uranium Rocks Into Surface Streams - II The Effect of Different Chemical Composition of Surface Water

1968 ◽  
Vol 14 (5) ◽  
pp. 423-430 ◽  
Author(s):  
Borivoj Havlik ◽  
Bedriska Nycova ◽  
Jaroslava Grafova
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
Uranium Ore ◽  
Ore Processing ◽  
Mill Waste

Natural radionuclides 238U, 226RA, AND 222RN in the surface water of the ELKONSKY uranium-ore district (South Yakutiya)

2019 ◽  
Vol 46 (6) ◽  
pp. 613-620
Author(s):  
A. P. Chevychelov ◽  
P. I. Sobakin ◽  
L. I. Kuznetsova
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
20Th Century ◽  
Radioactive Contamination ◽  
Raw Materials ◽  
Natural Radionuclides ◽  
Water Migration ◽  
Uranium Ore ◽  
Wide Scale ◽  
Ore District

Chemical composition of the surface water and the contents of the radionuclides 238U, 226Ra, and 222Rn in water was examined within the natural and man-made landscapes of South Yakutiya. It was demonstrated that intense water migration of these radionuclides from radioactive dump pits of the man-made landscapes of the Elkonsky uranium-ore district, which were created during the process of wide-scale exploration surveys for radioactive raw materials conducted during the last third of the 20th century, had occurred. Currently, the areas of water dissipation of 238U and 226Ra are detected at a distances of 2 km and greater from the source of the radioactive contamination along the outflow vector.

Hydrogeochemical and isotopic characterization of groundwater at Žitný Island (SW Slovakia)

2015 ◽  
Vol 46 (6) ◽  
pp. 929-942 ◽  
Author(s):  
Z. Ženišová ◽  
P. P. Povinec ◽  
A. Šivo ◽  
R. Breier ◽  
M. Richtáriková ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
Danube River ◽  
Water Isotopes ◽  
Anthropogenic Contamination ◽  
The Danube River ◽  
The Core ◽  
Groundwater Reservoir ◽  
Isotopic Characterization

Hydrogeochemical investigations and spatial variations studies on the distribution of water isotopes and radiocarbon in the groundwater of Žitný Island (Rye Island) were carried out. Žitný Island represents the largest groundwater reservoir in Central Europe (about 10 Gm3). The chemical composition of the groundwater of Žitný Island depends mainly on the chemical composition of Danube water, as well as on the length of its infiltration from the Danube River. The groundwater is characterized by potamogenic mineralization, and its chemical composition is influenced by anthropogenic contamination. Sub-surface water profiles showed enriched δ18O levels up to around 20 m water depth, and depleted values for deeper waters. The observed isotopic composition of the groundwater is similar to Danube water, suggesting that the Danube River is the main source of the Žitný Island groundwater. The core of the sub-surface 14C profile represents contemporary groundwater with 14C values above 80 pMC.

scholarly journals Geogenic and anthropogenic interactions at a former Sb mine: environmental impacts of As and Sb

2020 ◽  
Vol 42 (11) ◽  
pp. 3911-3924 ◽  
Author(s):  
Lenka Mbadugha ◽  
Duncan Cowper ◽  
Sapar Dossanov ◽  
Graeme I. Paton
Keyword(s):  
Surface Water ◽  
Concentration Distribution ◽  
Geochemical Processes ◽  
Environmental Standards ◽  
Run Off ◽  
Ore Processing ◽  
Regulatory Limits ◽  
Derelict Mine ◽  
Historic Mining ◽  
Spoil Heaps

Abstract Mining activities are acknowledged to introduce contaminants into localised environments and cause wider spread diffuse pollution. The concentration, distribution and fate of arsenic (As) and antimony (Sb) were studied at the former metalliferous Louisa Mine at Glendinning, Scotland. Soils and surface water were sampled and subsequently analysed to map the distribution of contamination and identify pollution sources. The maximum concentrations of As and Sb of 15,490 and 1504.2 mg kg−1, respectively, were determined in soils associated with the ore processing area and spoil heaps. The fractions of dissolved As and Sb in soils were < 1 and < 5% of total soil content, respectively, confirming findings of previous studies that As and Sb are relatively immobile. Yet, the concentrations of As and Sb released by soils exceeded regulatory limits. Concentrations of As and Sb in surface water in the immediate vicinity of the mine were impacted by a gully discharge, but rapidly diluted. While the concentrations affected by the run-off waters did not exceed EU environmental standards for freshwater, the concentrations of both, As and Sb, sharply increased above the said environmental standards approximately 100 m downstream of the mine site. The unaltered As-to-Sb ratio in water samples suggests a geogenic source. While there is a justifiable concern about the soil pollution caused by the historic mining in the area, the Glenshanna Burn is affected more by indigenous geochemical processes than the derelict mine.

scholarly journals Stability assessment of the chemical composition of the water used to supply the circuits in selected power plants of TAURON Group

2018 ◽  
Vol 44 ◽  
pp. 00064
Author(s):  
Marcin Karpiński ◽  
Kajetan d’Obyrn ◽  
Ewa Kmiecik ◽  
Barbara Tomaszewska
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
Mine Water ◽  
Power Plants ◽  
Negative Impact ◽  
Water Environment ◽  
Surface Water Quality ◽  
Electricity Production ◽  
Stability Assessment ◽  
Corrosion Properties

Electricity production in Poland is carried out mainly in conventional power plants, and the necessary resources include fuel and water. Significant water intake and production of sewage necessitate the application of technological solutions limiting the negative impact on the water environment. For this reason, Tauron Group's power plants for replenishing losses in cooling circuits use beside surface water, water from inactive mining plants. Due to the increased content of chlorides and sulphates in relation to surface water, mine water show significant corrosion properties. However, they are characterized by a relatively stable chemical composition mainly dependent on the physicochemical properties of the geological environment. The surface water quality is affected by many factors, such as seasons, thaws, rainfall, or the presence of pollutants from sewage disposal. The relative stability of the chemical composition of mine water allows for easier determination of chemical dosage during treatment process. The paper presents a stability assessment of the chemical composition of waters used to supplement circuits based on data from 2007–2017.

scholarly journals Spatial Differences in the Chemical Composition of Surface Water in the Hornsund Fjord Area: A Statistical Analysis with A Focus on Local Pollution Sources

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 496
Author(s):  
Krystyna Koziol ◽  
Marek Ruman ◽  
Filip Pawlak ◽  
Stanisław Chmiel ◽  
Żaneta Polkowska
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
Human Activity ◽  
Principal Component ◽  
Inverse Correlation ◽  
Published Data ◽  
Pollution Transport ◽  
Local Pollution ◽  
Water Composition ◽  
Spatial Differences

Surface catchments in Svalbard are sensitive to external pollution, and yet what is frequently considered external contamination may originate from local sources and natural processes. In this work, we analyze the chemical composition of surface waters in the catchments surrounding the Polish Polar Station in Svalbard, Hornsund fjord area. We have pooled unpublished and already published data describing surface water composition in 2010, related to its pH, electrical conductivity (EC), metals and metalloids, total organic carbon (TOC) and selected organic compound concentrations, including persistent organic pollutants (POPs) and surfactants. These data were statistically analyzed for spatial differences, using Kruskal–Wallis ANOVA and principal component analysis (PCA), with distance from the station in the PCA approximating local human activity impact. The geological composition of the substratum was found to be a strong determinant of metal and metalloid concentrations, sufficient to explain significant differences between the studied water bodies, except for the concentration of Cr. The past and present human activity in the area may have contributed also to some of the polycyclic aromatic hydrocarbons (PAHs), although only in the case of naphthalene can such an effect be confirmed by an inverse correlation with distance from the station. Other likely factors contributing to the chemical concentrations in the local waters are marine influence, long-range pollution transport and release from past deposition in the environment.

Modelling solution equilibria for uranium ore processing: The PbSO4-H2SO4-H2O and PbSO4-Na2SO4-H2O systems

1992 ◽  
Vol 56 (3) ◽  
pp. 1165-1173 ◽  
Author(s):  
C.R. Paige ◽  
W.A. Kornicker ◽  
O.E. Hileman ◽  
W.J. Snodgrass
Keyword(s):  
Uranium Ore ◽  
Solution Equilibria ◽  
Ore Processing

Seasonal variation of microplastics in seawater and zooplankton in Jiaozhou Bay, the Yellow Sea

2020 ◽  
Author(s):  
Xiaoxia Sun
Keyword(s):  
Seasonal Variation ◽  
Chemical Composition ◽  
Surface Water ◽  
Yellow Sea ◽  
Jiaozhou Bay ◽  
Coastal Areas ◽  
Average Concentration ◽  
The Yellow Sea ◽  
Plastic Pollution ◽  
Four Seasons

&lt;p&gt;Plastic pollution is a globally concerning issue in marine environments. There is currently little research about the seasonal changes in microplastics in coastal areas. Here, we report a seasonal study on the concentrations and characteristics of microplastics in the surface seawater and zooplankton of Jiaozhou Bay, a typical bay in the west Yellow Sea. The concentrations of microplastics in the surface water of Jiaozhou Bay were 0.063, 0.174, 0.094, and 0.050 pieces/m&lt;sup&gt;3 &lt;/sup&gt;in February, May, August and November, respectively, with an annual average concentration of 0.095 pieces/m&lt;sup&gt;3&lt;/sup&gt;, a low value compared with the plastic concentrations of other coastal areas. The size of the collected microplastics ranged from 346 to 155200 &amp;#956;m, with an average of 5093 &amp;#956;m. The overall percentages of fibers, fragments and plastic foams were 29%, 55% and 16%, respectively. Fragments were the most dominant shape in four seasons. Nine plastic polymers were detected from the surface water of Jiaozhou Bay. The dominant chemical composition was polypropylene (PP), accounting for 51.04% of polymers, followed by polyethylene (PE), accounting for 26.04% of polymers. The seasonal variation of plastic characteristics in Jiaozhou Bay, including the shape, color and chemical composition, was significant. The highest concentration of plastics occurred in May and the lowest concentration of plastics occurred in November. Strong rainfall resulted in an increase in the plastic concentration in May, and winds and eddies affected the spatial distribution of plastics in Jiaozhou Bay. Focused on the dominant zooplankton groups in Jiaozhou Bay, the morphology, color, size, chemical composition and quantity of MPs in zooplankton were investigated in Jiaozhou Bay. The results showed that the MPs in zooplankton of the Jiaozhou Bay were dominated by fibers. The proportions of fiber in February, May, August and November were 91%, 88%, 89% and 88%, respectively. The average size of MPs in zooplankton was 441&amp;#177;2, 468&amp;#177;2, 576&amp;#177;2, and 379&amp;#177;4&amp;#956;m in the four seasons. For the 2 common zooplankton groups in the 4 seasons, the MP/zooplankton was 0.3, 0.26, 0.17, 0.19 for copepod, and 0.22, 0.19, 0.17, 0.45 for chaetognath, respectively.&lt;/p&gt;

The chemical composition of surface water in the influence zone of the Severonikel smelter

2009 ◽  
Vol 47 (6) ◽  
pp. 592-610 ◽  
Author(s):  
V. A. Dauval’ter ◽  
M. V. Dauval’ter ◽  
N. V. Saltan ◽  
E. N. Semenov
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
Influence Zone
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