Acta Montanistica Slovaca最新文献_第4页

The removal of heavy metals from refinery effluents by sulfide precipitation 硫化物沉淀法去除炼油厂废水中的重金属

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.17

Levent Kartal, A. Sen, S. Timur, Hitit Üniversitesi, M. Fakultesi, Kuzey Kampüsü Çevre, Yolu Bulvarı

{"title":"The removal of heavy metals from refinery effluents by sulfide precipitation","authors":"Levent Kartal, A. Sen, S. Timur, Hitit Üniversitesi, M. Fakultesi, Kuzey Kampüsü Çevre, Yolu Bulvarı","doi":"10.46544/ams.v28i1.17","DOIUrl":"https://doi.org/10.46544/ams.v28i1.17","url":null,"abstract":"This study investigated the selective precipitation of copper (Cu2+), nickel (Ni2+) and zinc (Zn2+) ions from industrial wastewater by using sodium sulfide (Na2S). The effects of pH, time and free sulfide concentration on the selective precipitation were systematically investigated using synthetically prepared solutions and gold refinery wastewater. First, the optimum precipitation pH values of metals, the amount of Na2S and time were determined by using synthetic solutions containing Cu, Ni and Zn single metal ions. The highest precipitation efficiencies were obtained at a pH of 4, 5.3 and 5.3 for Cu, Ni and Zn, respectively. Based on these results, the effects of Na2S stoichiometry and time of precipitation were investigated with synthetically prepared solutions containing mixed metal ions (100 mg/L Cu2+, 90 mg/L Ni2+ and 100 mg/L Zn2+). Metal sulfide precipitation efficiencies increased with increasing amounts of Na2S and reached a maximum at a ratio of 1:1.75 (Metal ion: Na2S molar ratio). Lastly, the results obtained from the experiments performed with synthetic solutions were used for the metal sulfide precipitation from industrial wastewater. The precipitation from refining wastewater containing 10 g/L Cu2+, 0.3 g/L Ni2+ and 3 g/L Zn2+ ions was achieved at pH values from 2.3 to 5.3. At a pH of 2.3, Cu2+ precipitated as CuS (Cu2S) at 100% efficiency. While the Ni2+ concentration in the solution decreased by only 44% at a pH of 2.3, the Zn2+ concentration decreased by 52%. At a pH of 5.3, Cu2+ and Zn2+ precipitated together at 100%.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42214614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Human Factors in the Development of the Hydraulic System of the Powered Roof Support 液压支架液压系统开发中的人为因素

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.03

Beata Borska, D. Szurgacz, J. Pokorný, S. Zhironkin, O. Zhironkina

{"title":"Human Factors in the Development of the Hydraulic System of the Powered Roof Support","authors":"Beata Borska, D. Szurgacz, J. Pokorný, S. Zhironkin, O. Zhironkina","doi":"10.46544/ams.v28i1.03","DOIUrl":"https://doi.org/10.46544/ams.v28i1.03","url":null,"abstract":"The growing demand for mineral resources, including hard coal, requires the continuous improvement and development of technologies to improve safety, productivity and performance. The implementation of automation and digitization in mines has been ongoing for several years. Machinery and equipment development and improvement is also ongoing. The authors discuss the development and improvement of powered roof support, which is a critical part of the longwall system. The powered roof support is responsible for the safety of equipment and people working in the longwall. It supports the face and immediate roof and moves the longwall system forward as the shearer removes the coal and the roof collapsing (goafing) behind the shields. The aim of this study was to examine the human factors involved in the development and improvement of the hydraulic support system of powered roof support. The research was carried out among employees in hard coal mines using mainly surveys. The research allowed the authors to examine and analyze the information provided by the miners concerning powered roof support in the era of Industry 4.0 (the Fourth Industrial Revolution). According to the research findings, miners expect improvement in the reliability of the powered roof support, and they want the key operating parameters, especially the required load capacity, to be monitored in real-time so adjustments and improvements can be made. The results of the research point out the needs and expectations of miners. Their opinions should determine the direction and any research gaps into powered roof support.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46456109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of short-term prediction with regard to a number of accidents at work using the scoring method 利用计分法对若干工作事故进行短期预测

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.04

{"title":"Development of short-term prediction with regard to a number of accidents at work using the scoring method","authors":"","doi":"10.46544/ams.v28i1.04","DOIUrl":"https://doi.org/10.46544/ams.v28i1.04","url":null,"abstract":"The mining industry is an industry branch with one of the highest rates of accidents at work in Poland and the presented analysis develops the knowledge about the safety in the mining sector. The work below presents a short-term prediction of the overall work accident number in a selected industrial facility, developed on the basis of statistical accident rate data and using 25 selected econometric models. In the summary assessment of a specific prediction, the scoring method was applied, taking the following weights into consideration: C1 and C2 criteria (C) – 10 % each, C3 and C4 criteria – 20% each, and C5 criterion – 40 %, where: C1 was the value of ex post prediction error  for the series including the empirical data covering the period between 2007 and 2016; C2 was the value of ex post prediction error  for the series including the empirical data covering the period between 2007 and 2018; C3 was the value of coefficient of random variation Ve for the ex post predictions from the period between 2007 and 2016 (for all predictions except the linear and linearized models, the RMSE* value was applied to estimate their value); C4 was the value of coefficient of random variation Ve for the ex post predictions from the period between 2007 and 2018 (for all predictions except the linear and linearized models, the RMSE* value was applied to estimate their value); C5 was the value of ex post prediction error  for the series including the empirical data covering the period between 2017 and 2018. Statistical work accident rate data covering the period between 2007 and 2018 were used in the analysis.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46574048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risk Management for Surface Plants in Mines Using Risk Matrix and BowTie Analysis 基于风险矩阵和BowTie分析的矿山地表植物风险管理

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.05

引用次数: 0

Role of Information Communication Technologies Regarding Employment Aspect in Mining Industry 信息通信技术在矿业就业中的作用

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.10

{"title":"Role of Information Communication Technologies Regarding Employment Aspect in Mining Industry","authors":"","doi":"10.46544/ams.v28i1.10","DOIUrl":"https://doi.org/10.46544/ams.v28i1.10","url":null,"abstract":"The information and communications technologies represent a significant field in each sector of the economy. Currently, they are very rapidly growing means that bring new aspects in the particular industrial sectors. Employment is a very important perspective here. As the mining industry belong to the primary sector of the economy, it represents an essential part in a form of the first input branches. Nowadays, the information and communications technologies bring to the forefront novel methods and approaches that have been gradually becoming significance. The explored area covers all the 27 European Union member countries dated to the year 2020. The data set comprises the time period from the year 2008 to the year 2020. Employment in the mining industry from a view of the information and communications technologies is understood in the two ways – as a manufacturing side and as a side of the services offered here. Moreover, the altogether perspective is illustrated too. The nature of the data is investigated through the Jarque-Bera test, while the main analytical technique is the correspondence analysis. The scrutinised member countries of the European Union demonstrate the various development in the employment from a view of the information and communication technologies in the mining industry as a part of the primary sector of the economy.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43681271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the assessment of the risk situations emergence for automated control systems of the metallurgical industry companies 冶金企业自动化控制系统出现风险情况的评估研究

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.16

{"title":"Research on the assessment of the risk situations emergence for automated control systems of the metallurgical industry companies","authors":"","doi":"10.46544/ams.v28i1.16","DOIUrl":"https://doi.org/10.46544/ams.v28i1.16","url":null,"abstract":"The article presents the assessment method of the risk situations emergence based on the analysis of the probability and frequency of threats emergence for automated control systems of the metallurgical industry companies (ACSMIC). The analysis of the risk dependency on vulnerabilities and threats to ACSMIC assets is carried out, and the relationship between risk, vulnerability, and threat is presented according to a three-level risk assessment scale. When identifying and assessing the risk, existing countermeasures against both external and internal attacks are taken into account, which, in turn, reduces the risk level for the protected organization. In the process of any organization functioning, there may be a need to reassess the risk associated with changes in the structure of the control organization or security policy in the system of the metallurgical industry companies. Therefore, the existing countermeasures are closely related to the concept of risk and require constant correction in the assessment process. Risk is related to the reliability of the functioning of the studied control structure of units and aggregates and their ability to function in accordance with the mode and goals of the production structure in various branches and levels of the hierarchy with an acceptable risk assessment. On the basis of the system concepts and assessment methods of the acceptable risk level, the system-oriented method of identifying the reliability of functioning of self-recovering complex hierarchical structures is proposed, the classification of the risk types of unforeseen situations in complex human-oriented systems that can be applied and implemented in hierarchical control systems is carried out.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47590689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gold as an alternative payment and save haven against inflation 黄金作为替代支付方式和抵御通货膨胀的避险工具

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.01

引用次数: 0

Natural radioactivity in select metamorphic and sedimentary rocks of the Opava Mountains (Poland): A comparison between laboratory and in situ measurements of 232Th, 238U, and 40K activities 奥帕瓦山(波兰)部分变质岩和沉积岩的天然放射性:232Th、238U和40K活度的实验室测量和现场测量的比较

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.20

引用次数: 0

Review and assessment of import diversification methods and measures in the primary economic sector 审查和评估初级经济部门进口多样化的方法和措施

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.08

{"title":"Review and assessment of import diversification methods and measures in the primary economic sector","authors":"","doi":"10.46544/ams.v28i1.08","DOIUrl":"https://doi.org/10.46544/ams.v28i1.08","url":null,"abstract":"The diversification of import plays a very important role in the current world full of risks and political perturbations. Covid-19 lockdowns and Russian - Ukrainian war cause disruptions in supply chains. Therefore, import diversification is very important for ensuring the country's supply security. There are many measures and tools developed for assessing economic diversification, including import diversification though the majority of studies are addressing export diversification and analyzing the importance of economic diversification for economic growth and macro-economic stability in the primary sector. However, risks of supply disruptions, especially in the current globalized world, can cause many problems for specific industries, regions and countries. There is a literature gap on the analysis of import diversification methods and measures in terms of their suitability for economic analysis and decision-making in all economic sectors, including mining. The paper aims to overcome this gap by analyzing import diversification measures based on a systematic literature review and assessing them according to the main criteria of suitability for economic analysis and decision-making: simplicity, data availability, comparability and transparency. The ranking of import diversification methods and measures was provided based on conducted analysis and assessment.","PeriodicalId":50889,"journal":{"name":"Acta Montanistica Slovaca","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48029822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Driving Forces Behind Gas Price in Global Markets 全球市场天然气价格背后的驱动力

IF 1.6 4区地球科学

Acta Montanistica Slovaca Pub Date : 2023-06-12 DOI: 10.46544/ams.v28i1.12

引用次数: 0