Metal Ore Mining Technologies and Health of the Mining Region Population

2021 ◽  
pp. 7-12
Author(s):  
V.I. Golik ◽  
◽  
Yu.I. Razorenov ◽  
N.M. Kachurin ◽  
M.Yu. Liskova ◽  
...  
Keyword(s):  
Chemical Elements ◽  
Raw Materials ◽  
Chemical Exposure ◽  
Chemical Pollution ◽  
Residential Areas ◽  
Security Services ◽  
Ore Processing ◽  
Safe State ◽  
Negative Effect ◽  
The Impact

The issues of preventing chemical exposure of the products of mining and processing of mineral raw materials on the population of mining facilities are considered. The results are presented concerning assessment of the correlation between the intensity of chemical pollution of the infrastructure of mining enterprises and the health of miners and the population living in the vicinity of a mining enterprise by means of clinical and biochemical examination of residents. It is established that the negative effect of mining production on the health of the population is a consequence of development technologies with the abandonment of untreated ores in the cavities, where physicochemical processes of natural leaching are developing. It is shown that the known methods of fixing dumps reduce only the parameters of dust pollution without effecting the contamination of the territory with metal solutions, and the forms of finding chemical elements in the tailings of processing do not prevent their inclusion in the biological cycles of living creatures, therefore, the radical measure to prevent progressive morbidity is only the extraction of metals from the tailings of ore processing during disposal. It is established that the speed and direction of exomorphodynamic processes are determined by the parameters of movement of the mobile fractions of metallic minerals. The activity of natural leaching processes is a consequence of the development technologies and can be reduced by using controlled leaching of metal-containing minerals. The formula for the dependence of the parameters of chemical pollution on the distance to the pollution focus is obtained. The assessment of social damage from the effect of the polluted environment on health of the population only by expanses on the treatment of the population and social security services during disability is incorrect, because the impact of metals is much larger. The use of tailings for processing waste from the mining cycle after bringing it to a safe state in terms of metal content allows to reduce morbidity of workers and the population of residential areas of mining production.

scholarly journals HYGIENIC ASSESSMENT OF THE CONTENT OF CHEMICALS IN THE SOIL OF MINING AREAS OF THE TRANS-BAIKAL REGION

2019 ◽  
Vol 98 (4) ◽  
pp. 400-410 ◽  
Author(s):  
L. A. Mikhailova ◽  
M. A. Solodukhina ◽  
O. G. Alekseeva ◽  
N. M. Burlaka ◽  
S. E. Lapa
Keyword(s):  
Heavy Metals ◽  
Soil Contamination ◽  
Chemical Elements ◽  
Raw Materials ◽  
Atomic Absorption Spectrophotometry ◽  
Arsenic Content ◽  
Toxic Substances ◽  
Residential Areas ◽  
Entire Area ◽  
Mining Areas

Introduction. Intensive exploration and processing of mineral raw materials in the Trans-Baikal territory has caused the accumulation of considerable amount of industrial mining waste with high content of chemical elements of different classes of hazard. Currently 33 tailings storage facilities (TSF) accumulating approximately 3 milliard tons of different industrial waste are located in the territory of the region. The aim of the research is the hygienic assessment of soil contamination in the residential areas adjacent to TSFs. Material and methods. Atomic absorption spectrophotometry method was used for the determination of heavy metals. The study presents the results of analyses of 444 samples of gross content of lead, zinc, copper, mercury, arsenic, and cadmium in the soil of Khapcheranga, Sherlovaya Gora, Kadaya, Vershino-Darasunsky, and Vershino-Shakhtaminsky mining villages throughout the duration of 2012 - 2015. Results. During the period of the study the total value of soil contamination with Zc calculated by the median concentrations in Khapcheranga Village amounted to 4.7 6.9, in Vershino-Shakhtaminaky - to 6.7 8.8, which corresponds to the «allowable» level of the contamination. Zc calculation by maximum concentrations has shown the soil to be referred to the category from “moderately dangerous” to “extremely dangerous”; this value in Khapcheranga Village amounted to 48.7 - 235.3, in Vershino-Shakhtaminsky Village - to 23.76 - 164.8. Discussion. In the residential areas the allowable degree of soil contamination was determined to be predominantly observed; Khapcheranga and Vershino-Shakhtaminsky villages are the exceptions. The results of the assessment give the evidence of tge increased lead, cadmium and arsenic content throughout the entire area of the villages, while the highest levels of accumulated toxic substances are registered in the areas located near the TSF Conclusion. Thus, several zones of natural and anthropogenous contamination with increased concentrations of heavy metals and arsenic have been formed in the Trans-Baikal Territory. This dictates the need to study the influence of geochemical anomalies on the health of population.

STALE GOLD-BEARING TAILINGS OF THE BALEIZOLOTO PLANT AND THE PROBLEM OF THEIR DISPOSAL

2021 ◽  
Vol 27 (4) ◽  
pp. 45-54
Author(s):  
G. Yurgenson ◽  
◽  
L. Shumilova ◽  
А. Khatkova ◽  
◽  
...  
Keyword(s):  
Negative Impact ◽  
Chemical Elements ◽  
Raw Materials ◽  
Precious Metals ◽  
Gold Content ◽  
Residential Areas ◽  
Extraction Technology ◽  
Useful Components ◽  
Technogenic Raw Materials ◽  
Gold Bearing

The relevance of the research is the need to recultivate the waste from the enrichment of gold-bearing ores that lie in the immediate vicinity of the residential areas of Baley city, which have a negative impact on the environmental situation in it, as well as to develop a technological approach to the extraction of gold and silver. The purpose of the study is to study the material composition and develop a technology for extracting precious metals. The object of the study is the stale tailings of the ZIF-1 plant “Baleizoloto”. The subject of the study is mineral composition of stale tailings, content of useful components and their extraction technology, the method and methodology presented by mineralogical and chemical analyses of enrichment tailings. Results. The analysis of the tailings dumps’ state of the gold recovery factories of the Baleizoloto plant was carried out. The contents of gold and other chemical elements, among which arsenic, zinc, copper, antimony, and lead predominate, were determined. The gold content prevails in the stale tailings of the ZIF-1 factory, which processed the ores of the Baley deposit, and is in the range of 1.09-1.37 g / t, on average – 1.17 g/t. This determines the prospects for their primary processing. The gold in the clay-sand fraction of the stale tailings is mainly found in thin accretions with quartz, carbonates, pyrite, arsenopyrite, sulfosols, and tellurides. The field of application is processing of technogenic raw materials. Conclusions. It was determined that the sizes of gold inclusions are in the range of 0.7-0.03 mm, the gold penetration varies from 63 to 91.15, and on average is 82.13; the main impurity in gold is silver with a content of 8.85-37%; the average silver content in the tailings of the ZIF-1 factory is 1.85 g/t; the recommended technological scheme for processing stale tailings of ZIF-1 of the Baleizoloto plant has been developed, including the following operations: photoelectron-activation preparation, pelletizing with active solution, heap leaching, two-stage sorption with bubbling with ozone

scholarly journals The electronic structure of the atom as a classification criterion of mineral technogenic waste

2021 ◽  
Vol 2131 (4) ◽  
pp. 042095
Author(s):  
A Sakharova ◽  
L Maslennikova
Keyword(s):  
Electronic Structure ◽  
Building Materials ◽  
Energy Gap ◽  
Chemical Elements ◽  
Raw Materials ◽  
Waste Recycling ◽  
Model Systems ◽  
Technogenic Waste ◽  
The Impact ◽  
Gap Width

Abstract Today, the total scientific classification of solid industrial waste is absent because of their diversity. The task of universal of mineral technogenic waste recycling is complicated by the difference in their composition. The nature of the chemical elements that make up building materials is always taken into account to predict their properties. In this regard, the purpose of the study was to determine the classification characteristics of mineral technogenic waste recycling on the basis of natural-scientific ideas about the electronic structure of the atom. Studies were conducted on model systems with ceramic oxides entering s-, p-, d- elements in ceramic matrix to test the impact of the electronic structure of the mineral waste cation on operational characteristics of building materials. The experimental results showed that the strength of the samples changes in the series s → p → d of the belonging of the introduced oxide cation to the electronic family. Additionally, such an indicator as the energy-gap width was used to study the nature of the contacting solid phases. It is possible to identify which substances in technogenic raw materials have the greatest effect on the performance of the material in value of the energy-gap width.

scholarly journals Impact of surface contamination on elemental composition of Sanguinea (Pall.) leaves

2021 ◽  
Vol 38 ◽  
pp. 00105
Author(s):  
Valentina A. Sagaradze ◽  
Elena Y. Babaeva ◽  
Yulia V. Zagurskaya ◽  
Tatyana I. Siromlya
Keyword(s):  
Elemental Composition ◽  
Plant Material ◽  
Chemical Elements ◽  
Raw Materials ◽  
Ash Content ◽  
Surface Contamination ◽  
Dust Particles ◽  
Fine Dust ◽  
Visual Condition ◽  
The Impact

The leaves of C. sanguinea Pall. have the potential to accumulate dust on the surface. As the fine dust particles contain various chemical elements (ChEs), we studied the ChE composition in the leaves with different degrees of dust contamination to assess the impact on assay results. The samples of C. sanguinea leaves collected in the Kemerovo region (Russia) were divided into two groups based on the visual condition of plant material: clean leaves and dust contaminated leaves. The total ash assay revealed higher ash content, exceeding pharmacopoeial standards in the dust contaminated group. Dust contaminated leaf samples demonstrated significantly higher concentrations of many ChE: Si, Fe, Al, Na, Ti, Ni, Zr, Cr, V, Pb, La, Ga, Y, Sc and Yb comparing to non-contaminated plant material. The values of potentially hazardous ChEs were significantly lower than the maximum levels specified for medicinal raw materials in all studied samples.

scholarly journals Role of Si3N4 on microstructure and hardness of hot-pressed ZrB2−SiC composites

2021 ◽  
Vol 1 (1) ◽  
pp. 34-40
Author(s):  
Zahra Bahararjmand ◽  
Mohammad A. Khalilzadeh ◽  
Farshad Saberi-Movahed ◽  
Tae Hyung Lee ◽  
Jinghan Wang ◽  
...  
Keyword(s):  
Relative Density ◽  
Vickers Hardness ◽  
Raw Materials ◽  
Soft Phase ◽  
Negative Effect ◽  
Sic Composites ◽  
The Impact ◽  
Positive Effect

The impact of Si3N4 content on the hardness and microstructural developments of ZrB2-SiC material has been investigated thoroughly in the present investigation. Having prepared the raw materials in a jar mill, the ZrB2-SiC samples containing various amounts of Si3N4 were hot-pressed at 1850 °C. Furthermore, XRD, FESEM, and HRTEM were utilized to evaluate the microstructure of samples. The formation of in-situ h-BN was proved by the mentioned methods. Also, it was shown that the Vickers hardness of ZrB2-SiC increases up to 20 GPa in presence of 4.5 wt% Si3N4 which is 3 GPa more than the sample without Si3N4. Results show that the positive effect of increased relative density on hardness is more than the negative effect of h-BN soft phase formation.

scholarly journals The Impact of Dust and Salt Aerosols of the Aral Sea on the Tissues of Rat Testes in the Experiment

2020 ◽  
Vol 8 (A) ◽  
pp. 452-456
Author(s):  
Assylgul Suleimen ◽  
Roza Yesimova ◽  
Bibigul Rakhimova ◽  
Gulnaz Suleimen ◽  
Aidana Yerubay ◽  
...  
Keyword(s):  
Climate Change ◽  
Reproductive Function ◽  
Aral Sea ◽  
Male Rats ◽  
Chemical Pollution ◽  
Seminiferous Tubules ◽  
Control Group ◽  
Negative Effect ◽  
Histological Characteristics ◽  
The Impact

BACKGROUND: The Aral Sea crisis is recognized as one of the global environmental problems of our time. The extreme environmental situation in the region is caused by massive chemical pollution of the territory for several decades by high doses of pesticides, herbicides, dumping of industrial waste into the rivers that feed the Aral Sea. As a result of the Aral Sea desiccation, aridization of the territory, climate change, and salinization of soil and water occurred. This led to increased mineralization of precipitation, climate change, the spread and deposition of dust on an area of about 25 million hectares. One of the factors in reducing fertile activity in humans is a decrease in spermatogenesis activity. Based on identified trends, WHO is forced to review the main indicators of spermograms in the direction of their reduction. AIM: To study the effect of dust and salt aerosols of the Aral Sea on reproductive function, rat testes were studied after 7 and 24 days of inhalation administration. MATERIAL AND METHODS: Some morphometric parameters of the testes were evaluated: The diameter of the convoluted seminiferous tubules and the thickness of the germinal epithelium. The obtained comparative morphological and histological characteristics of the testes of the control and experimental groups indicate the negative effect of the components of dust and salt aerosols of the Aral Sea on the reproductive function of male rats. RESULTS: The thickness of the epithelial spermatogenic layer in the second group of rats is on average 64.52 μm, which is significantly less compared to the control group (81.3 μm). The thickness of the epithelial spermatogenous layer in the third group is on average within 73.36 μm, which is significantly less than in the control group (81.3 μm), but more than in the group exposed to dust and salt aerosols for 7 days (64, 52 μm). CONCLUSION: The study revealed that the impact of dust and salt aerosols of the Aral Sea leads to a change in the morphological and histological characteristics of the testes of animals. In experimental groups, a decrease in the diameter of the convoluted seminiferous tubule and a decrease in the thickness of the epithelial spermatogenic layer were observed. This indicates the negative effect of the components of dust and salt aerosols of the Aral Sea on the reproductive function of male rats exposed to dust for 7 and 24 days.

scholarly journals Impact of surface contamination on elemental composition of Crataegus sanguinea (Pall.) leaves

2021 ◽  
Vol 38 ◽  
pp. 00145
Author(s):  
Valentina A. Sagaradze ◽  
Elena Y. Babaeva ◽  
Yulia V. Zagurskaya ◽  
Tatyana I. Siromlya
Keyword(s):  
Elemental Composition ◽  
Plant Material ◽  
Chemical Elements ◽  
Raw Materials ◽  
Ash Content ◽  
Surface Contamination ◽  
Dust Particles ◽  
Fine Dust ◽  
Visual Condition ◽  
The Impact

The leaves of C. sanguinea Pall. have the potential to accumulate dust on the surface. As the fine dust particles contain various chemical elements (ChEs), we studied the ChE composition in the leaves with different degrees of dust contamination to assess the impact on assay results. The samples of C. sanguinea leaves collected in the Kemerovo region (Russia) were divided into two groups based on the visual condition of plant material: clean leaves and dust contaminated leaves. The total ash assay revealed higher ash content, exceeding pharmacopoeial standards in the dust contaminated group. Dust contaminated leaf samples demonstrated significantly higher concentrations of many ChE: Si, Fe, Al, Na, Ti, Ni, Zr, Cr, V, Pb, La, Ga, Y, Sc and Yb comparing to non-contaminated plant material. The values of potentially hazardous ChEs were significantly lower than the maximum levels specified for medicinal raw materials in all studied samples.

ASSESSMENT OF THE IMPACT OF TECHNOGENIC FORMATIONS FROM MULTICOMPONENT ORE PROCESSING WASTE ON THE ECOSYSTEMS OF MINING REGIONS

2020 ◽  
Vol 3 (1) ◽  
pp. 5-17
Author(s):  
M.V. RYLNIKOVA ◽  
◽  
D.N. RADCHENKO ◽  
M.V. TSUPKINA ◽  
A.E. KIRKOV ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Vegetation Cover ◽  
Chemical Elements ◽  
Soil Layer ◽  
Gold Deposits ◽  
Environmental Damage ◽  
Processing Waste ◽  
Ore Processing ◽  
Living Organisms ◽  
The Impact

The problem of developing gold deposits in the southern Urals from the point of view of assessing the environmental impact on the vegetation cover and living organisms of mountain territories is considered. The analysis of scientific papers devoted to such topics in the world is carried out. It is confirmed that long-term storage and storage of mining waste in existing and decommissioned storage facilities, represented by waste from ore processing, causes serious environmental damage to the environment in the areas of their location and adjacent territories. This is evidenced by high concentrations of toxic chemical elements in technogenic mineral raw materials, soil layer, vegetation cover and organs of living organisms, which is due to the removal of heavy metals from a large area of technogenic formations, along with dust and drainage drains. It is proved that these factors must be taken into account when assessing the level of environmental impact of gold-containing ore processing waste on the environment.

The Transnational Women's Rights Movement and the World Economy

2020 ◽  
Vol 6 (2) ◽  
pp. 145-173 ◽  
Author(s):  
Heidi E. Rademacher
Keyword(s):  
Women's Rights ◽  
Small Body ◽  
World System ◽  
World Society ◽  
Women’S Rights ◽  
Social Movement Organizations ◽  
Global Movement ◽  
Negative Effect ◽  
Society Perspective ◽  
The Impact

Promoting the ratification of the Convention on the Elimination of All Forms of Discrimination against Women (CEDAW) was a key objective of the transnational women's movement of the 1980s and 1990s. Yet, few studies examine what factors contribute to ratification. The small body of literature on this topic comes from a world-society perspective, which suggests that CEDAW represented a global shift toward women's rights and that ratification increased as international NGOs proliferated. However, this framing fails to consider whether diffusion varies in a stratified world-system. I combine world-society and world-systems approaches, adding to the literature by examining the impact of women's and human rights transnational social movement organizations on CEDAW ratification at varied world-system positions. The findings illustrate the complex strengths and limitations of a global movement, with such organizations having a negative effect on ratification among core nations, a positive effect in the semiperiphery, and no effect among periphery nations. This suggests that the impact of mobilization was neither a universal application of global scripts nor simply representative of the broad domination of core nations, but a complex and diverse result of civil society actors embedded in a politically stratified world.

The Impact of Competitive Quasi-Market on Service Delivery in Benue State University, Makurdi Nigeria

GIS Business ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. 85-98
Author(s):  
Idoko Peter
Keyword(s):  
Service Delivery ◽  
A Priori ◽  
Least Square ◽  
Secondary Source ◽  
State University ◽  
Ordinary Least Square ◽  
Negative Effect ◽  
The Impact ◽  
The Relationship

This research the impact of competitive quasi market on service delivery in Benue State University, Makurdi Nigeria. Both primary and secondary source of data and information were used for the study and questionnaire was used to extract information from the purposively selected respondents. The population for this study is one hundred and seventy three (173) administrative staff of Benue State University selected at random. The statistical tools employed was the classical ordinary least square (OLS) and the probability value of the estimates was used to tests hypotheses of the study. The result of the study indicates that a positive relationship exist between Competitive quasi marketing in Benue State University, Makurdi Nigeria (CQM) and Transparency in the service delivery (TRSP) and the relationship is statistically significant (p<0.05). Competitive quasi marketing (CQM) has a negative effect on Observe Competence in Benue State University, Makurdi Nigeria (OBCP) and the relationship is not statistically significant (p>0.05). Competitive quasi marketing (CQM) has a positive effect on Innovation in Benue State University, Makurdi Nigeria (INVO) and the relationship is statistically significant (p<0.05) and in line with a priori expectation. This means that a unit increases in Competitive quasi marketing (CQM) will result to a corresponding increase in innovation in Benue State University, Makurdi Nigeria (INVO) by a margin of 22.5%. It was concluded that government monopoly in the provision of certain types of services has greatly affected the quality of service experience in the institution. It was recommended among others that the stakeholders in the market has to be transparent so that the system will be productive to serve the society effectively

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