POTENTIALLY TOXIC CHEMICAL ELEMENTS OF SHALE PLAYS – ECOLOGICAL THREAT TO THE ENVIRONMENT

2020 ◽  
Author(s):  
Svetlana Punanova
Keyword(s):  
Chemical Elements ◽  
Organometallic Compounds ◽  
Cost Effective ◽  
Potentially Toxic Elements ◽  
Shale Oil ◽  
Toxic Chemical ◽  
Horizontal Drilling ◽  
Soil Layers ◽  
Valuable Metals ◽  
Economic Use

This research considered the content of trace elements (TE), including potentially toxic elements (PTE) in shale plays and deposits in various regions of the world. Their comparative analysis was carried out and the highest concentrations of PTE in the shales of some regions were revealed. The author notes that the destruction of organometallic compounds occurs during the development of shale hydrocarbon (HC) using horizontal drilling with hydraulic fracturing – injecting large volumes of chemicals while increasing the temperature. During such destruction processes, PTE can escape into the environment: into groundwater, soil layers, and other objects of economic use, and also deteriorate well equipment. In connection with the noted environmental hazards present during the development of shale HC, this paper proposes to monitor the content of TE in both shale rocks as well as in extracted shale oil in order to mitigate the risks of their release into the environment. In addition, developers and scientists should consider the losses of industrially significant volumes of valuable metals that occur due to the lack of cost-effective technologies for their capture and extraction from naphthides.

scholarly journals Selected Essential and Toxic Chemical Elements in Hypothyroidism—A Literature Review (2001–2021)

2021 ◽  
Vol 22 (18) ◽  
pp. 10147
Author(s):  
Anna Błażewicz ◽  
Patrycja Wiśniewska ◽  
Katarzyna Skórzyńska-Dziduszko
Keyword(s):  
Toxic Elements ◽  
Web Of Science ◽  
Chemical Elements ◽  
Physiological State ◽  
Potentially Toxic Elements ◽  
The Body ◽  
Toxic Chemical ◽  
Thyroid Status ◽  
Hormone Synthesis ◽  
Essential Chemical

Thyroid hormones are known for controlling metabolism of lipids, carbohydrates, proteins, minerals, and electrolytes and for regulating body temperature. Normal thyroid status depends on the chemical/elemental composition of body fluids and tissues, which changes depending on physiological state, lifestyle and environment. A deficiency or excess of certain essential chemical elements (selenium, zinc, copper, iron or fluorine) or exposure to toxic (cadmium or lead) or potentially toxic elements (manganese or chromium) interacts with thyroid hormone synthesis and may disturb thyroid homeostasis. In our review, accessible databases (Scopus, PubMed and Web of Science) were searched for articles from 2001–2021 on the influence of selected chemical elements on the development of hypothyroidism. Our review adopted some of the strengths of a systematic review. After non-eligible reports were rejected, 29 remaining articles were reviewed. The review found that disruption of the physiological levels of elements in the body adversely affects the functioning of cells and tissues, which can lead to the development of disease.

scholarly journals Development of Rural Ecotourism on the Yurshinsky Island of Rybinsk Reservoir

2020 ◽  
Vol 217 ◽  
pp. 05002
Author(s):  
Svetlana Zamana ◽  
Olga Sorokina ◽  
Dmitriy Shapovalov ◽  
Alexandr Fomin ◽  
Larisa Petrova ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Protected Area ◽  
Rybinsk Reservoir ◽  
Chemical Elements ◽  
Soil Samples ◽  
Tourist Industry ◽  
Toxic Chemical ◽  
Young Branch ◽  
The Given ◽  
The Rybinsk Reservoir

Agroecotourism is a relatively young branch of tourist industry in our country, at the same time it has become very popular abroad. The article considers some problems related to the development of rural ecotourism on the Yurshinsky island of Rybinsk reservoir. Various landscapes can be seen on the Yurshinsky island, escaping flowage of the Rybinsk reservoir area, where unique samples of Russian nature have remained untouched. The territory of island makes 792 hectares, half of its land is occupied by woods, and now all island has a status of specially protected area. Moose breeding farm is recommended to be established as the object of rural ecotourism on the Yurshinsky island, as its operation allows the tourist season last all-year-round. Ecological conditions of the territory need to be assessed before the organization of a moose farm and other objects of agroecotourism. Therefore we selected several soil samples to perform chemical analysis as the soil represents the knot of interrelations in biosphere and a lack or surplus of both vital, and toxic chemical elements in the soil will lead to their lack or surplus in plants grown up on such soils and in animal organisms which eat the given plants.

scholarly journals It’s Time to Replace the Term “Heavy Metals” with “Potentially Toxic Elements” When Reporting Environmental Research

2019 ◽  
Vol 16 (22) ◽  
pp. 4446 ◽  
Author(s):  
Olivier Pourret ◽  
Andrew Hursthouse
Keyword(s):  
Heavy Metals ◽  
Toxic Elements ◽  
Chemical Elements ◽  
Natural Sciences ◽  
Potentially Toxic Elements ◽  
Toxic Element ◽  
Environmental Research ◽  
Environmental Sciences ◽  
Common Term ◽  
Pollution Impacts

Even if the Periodic Table of Chemical Elements is relatively well defined, some controversial terms are still in use. Indeed, the term “heavy metal” is a common term used for decades in the natural sciences, and even more in environmental sciences, particularly in studies of pollution impacts. As the use of the term appears to have increased, we highlight the relevance of the use of the term “Potentially Toxic Element(s)”, which needs more explicit endorsement, and we illustrate the chemical elements that need to be considered.

Essential and Potentially Toxic Chemical Elements in Beverages

2007 ◽  
pp. 455-501
Author(s):  
Patricia Smichowski ◽  
Daniel A. Batistoni
Keyword(s):  
Chemical Elements ◽  
Toxic Chemical

scholarly journals Efficiency of vermicompost production and use in agriculture

2019 ◽  
Vol 91 ◽  
pp. 06006 ◽  
Author(s):  
Elena Shetinina ◽  
Arina Shetinina ◽  
Irina Potashova
Keyword(s):  
Chemical Elements ◽  
Natural Habitat ◽  
Environmentally Friendly ◽  
Environmental Problems ◽  
Practical Significance ◽  
Chemical Effect ◽  
Chemical Fertilizers ◽  
Soil Layers ◽  
Mineral Soils ◽  
The One

The relevance of the study is due to the need to eliminate the environmental problems associated with the irrational use of chemical fertilizers in agriculture. Biohumus is an environmentally friendly natural fertilizer, which is produced by processing food waste ringworms, whose natural habitat is compost mass and not mineral soils. Thus, the production does not violate the flora and fauna and at the same time is environmentally friendly and waste-free. Practical significance of the study consists in the development of measures, the implementation of which will allow solving environmental problems caused by the irrational use of chemical fertilizers. As part of the study, the authors proposed using biohumus as a natural fertilizer, which allows, on the one hand, reducing the chemical effect on the soil cover, reducing the chemical elements content in finished agricultural products, eliminating the plants treatment with pesticides, and on the other hand, increasing the natural yield, developing immunity in plants of various species, and improving the physical properties of the soil layers.

Using X-ray fluorescence core scanning to assess acid sulfate soils

Soil Research ◽  
2014 ◽  
Vol 52 (8) ◽  
pp. 760 ◽  
Author(s):  
Ulrike Proske ◽  
Henk Heijnis ◽  
Patricia Gadd
Keyword(s):  
Chemical Elements ◽  
Sediment Cores ◽  
Cost Effective ◽  
Transitional Zone ◽  
Initial Assessment ◽  
Acid Sulfate Soils ◽  
Acid Sulfate ◽  
X Ray ◽  
Effective Manner ◽  
Sulfate Soils

During the formation of acid sulfate soils (ASS), several chemical elements in the sediment are mobilised. These elements are removed from the sediment or become enriched as precipitates in distinct horizons. The stratigraphic depth in which these precipitates accumulate is element-specific and is located either within the oxidised or in a transitional zone between the oxidised and the reduced zone. Aim of this study is to demonstrate how X-ray fluorescence core scanning, together with detailed sediment descriptions, can be used to perform an initial assessment of these different zones in ASS in a fast and cost-effective manner. We measured the chemical element signatures of K, Fe, Pb, Sr, Zn, Ni, Y, Mn and Ca in two sediment cores from Western Australia where ASS are suspected to occur. The oxidised zone in both cores is characterised by the occurrence of jarosite, which is indicated by pale straw yellow mottling and synchronous peaks in Fe/Ti, K/Ti, Pb/Ti and Sr/Ti, and of other secondary Fe-oxides, which are indicated by reddish mottling and synchronous peaks in Fe/Ti and Pb/Ti. The transition zone into reduced material is marked by synchronous peaks in Zn/Ti, Ni/Ti, Y/Ti and Mn/Ti. Based on these characteristic signatures, we broadly estimated the depth of the oxidised and the transitional zone at both sites.

Cost Effective Large Blade Components by Using Carbon Fibers

2002 ◽  
Vol 124 (4) ◽  
pp. 412-418 ◽  
Author(s):  
P. A. Joosse ◽  
D. R. V. van Delft ◽  
Chr. Kensche ◽  
D. Soendergaard ◽  
R. M. van den Berg ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Cost Effective ◽  
Material Design ◽  
Performance Ratio ◽  
Fatigue Properties ◽  
Basic Material ◽  
Design Data ◽  
Price Performance ◽  
Severe Fatigue ◽  
Economic Use

For large off-shore wind turbines, blades with relative low blade mass are becoming more important. The economic use of large-tow carbon fibers can help achieve lower blade masses. Basic material design data have been established for two promising material combinations, including the fatigue properties for Panex33/epoxy. Blade root joints have been developed in a carbon/glass combination, resulting in a better price performance ratio. The initial cost assessment on a blade dominated by severe fatigue loads shows that application of carbon fibers in the spar leads to cost reductions.

scholarly journals Horizontal Drilling: Regulatory and Contractual Implications

1992 ◽  
Vol 30 (1) ◽  
pp. 272
Author(s):  
R. E. Pelzer ◽  
R. A. Lehodey
Keyword(s):  
New Technology ◽  
Horizontal Wells ◽  
Cost Effective ◽  
Gas Industry ◽  
Horizontal Drilling ◽  
Flow Rates ◽  
Legal Implications ◽  
Natural Gas Industry ◽  
Technological Developments ◽  
The Common

Recent technological developments have allowed the petroleum and natural gas industry to drill horizontal wells on a cost-effective basis. Although the technology is still relatively new in Canada, it has potentially significant benefits to the industry, including greater flow rates per well and greater ultimate recovery of petroleum substances. It has been estimated that by 1995 there may be as many as 450 horizontal wells drilled in Alberta per year. The implications of horizontal drilling are that the current regulatory schemes and certain of the common agreements utilized in the industry do not readily accommodate it. The authors discuss some of the legal implications raised by the new technology and examine problems with the current regulatory schemes and certain industry agreements.

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