Features of interaction between potassium salts mining and the environment  Alexander Brodt Eco-Safe Mining Corp., 510 Reeves Drive, Grand Forks, ND 58201, USA Corresponding author: alexander.brodt@gmail.com  ABSTRACT. Unlike the vast majority of minerals, the gangue in all types of halurgic raw materials is represented by a water-soluble material – rock salt, contaminated clay and other impurities insoluble in water. ...

GEOPHYSICAL INVESTIGATIONS USING SEISMIC REFLECTION METHOD IN THE AREA WITH THE GEOTHERMAL WATERS Blagica Doneva, Zoran Panov, Radmila Karanakova Stefanovska, Risto Popovski Faculty of Natural and Technical Sciences, Goce Delcev University, Stip, North Macedonia, blagica.doneva@ugd.edu.mk Corresponding author: blagica.doneva@ugd.edu.mk ABSTRACT. Reflection seismic investigations in the „Podlog-Banja“ geothermal field are the first investigations of this kind planned to perform „pilot“ doublet-system ...

DEVELOPMENT OF A NON-LINEAR LEAST-SQUARES KINETIC MODEL FOR HEAP LEACH CHEMICAL EXTRACTION USING COLUMN LEACH DATA Naci Umut Duru University of Nevada Reno, USA; E-mail: nduru@nevada.unr.edu ABSTRACT. Mathematical modelling plays a central role in the interpretation of hydrometallurgical extraction processes. Laboratory experiments generate valuable information regarding the dissolution behaviour of minerals; however, meaningful interpretation of experimental results ...

EFFICIENCY AND SELECTIVITY OF COPPER PRECIPITATION AS COPPER OXALATE FROM SOLUTIONS FROM THE MINING INDUSTRY Plamen Georgiev, Marina Nicolova University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: ps_georgiev@mgu.bg Corresponding author: ps_georgiev@mgu.bg ABSTRACT. The aim of this study was to investigate the effect of calcium and ferrous iron ions on the removal of copper-to-copper oxalate from a ...

Non-ferrous metal bioleaching from copper slag with a spent medium of sporosarcina ureae Plamen Georgiev, Marina Nicolova, Irena Spasova University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia; E-mail: ps_georgiev@mgu.bg Corresponding author: ps_georgiev@mgu.bg ABSTRACT. The aim of this study is the indirect bioleaching of non-ferrous metals from pyrometallurgical copper slag containing 0.36% Cu, 1.93% Zn, and 0.09% ...

Influence of the construction of a biosensor based on sediment microbial fuel cells on its sensitivity to WATERs contaminated with heavy metals Rosen Ivanov University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia Corresponding author: r.ivanov@mgu.bg ABSTRACT. Sediment microbial fuel cells (SMFC) based biosensors can be a simpler and cheaper alternative to traditional methods for monitoring and early ...

Study of Strength Reduction in Natural Stone under Repeated Non-Destructive Dynamic Loading Valentyn Korobiichuk1, Sergii Iskov1, Vasyl Mamrai1,2, Volodymyr Shamrai1, Dmytro Bilobrov1 1Zhytomyr Polytechnic State University, 10005 Zhytomyr, Ukraine; E-mail: korobiichykv@gmail.com, serga.iskov@ztu.edu.ua, vmamray@ztu.edu.ua, kgt_shvi@ztu.edu.ua, dimabelobrov86@gmail.com 2 Kütahya Dumlupınar University, 43100 Kütahya; E-mail: vmamray@gmail.com Corresponding author: korobiichykv@gmail.com ABSTRACT. This paper investigates the reduction of strength in natural stone under repeated non-destructive ...

SUSTAINABLE MATERIALS FOR URANIUM REMOVAL FROM MINE WATER: COMPARATIVE EVALUATION OF ZERO-VALENT IRON NANOPARTICLES, CONVENTIONAL SORBENTS, AND FUNCTIONALISED MAGNETIC NANOMATERIALS Alexandre Loukanov1,2 1Laboratory of Engineering NanoBiotechnology, Department of Eng. Geoecology, University of Mining and Geology “St. Ivan Rilski”, Sofia, Bulgaria, E-mail: a.loukanov@mgu.bg 2Department of Chemistry and Materials Science, National Institute of Technology, Gunma College, 580 Toriba, Maebashi, Gunma ...

REHABILITATION AND RECONVERSION OF COAL MINING SITES: SUSTAINABLE SOLUTIONS FOR ENERGY TRANSITION IN THE PERNIK REGION Petar Petrov, Veneta Stefanova, Zhivko Vasilev, Stanimira Ivanova, Iva Stamenova-Yordanova, Elena Georgieva University of Forestry, 10 Kliment Ohridski Blvd., 1797 Sofia, Bulgaria, petargpetrof@gmail.com, venistefanova3@gmail.com, zhivko.vasilev@mail.bg, ivanova.stanimiraa@gmail.com, ivastamenovaa@gmail.com, eli1307@abv.bg   Corresponding author: zhivko.vasilev@mail.bg ABSTRACT. This study assesses the rehabilitation and reconversion potential of coal ...

INVESTIGATION OF FACTORS AFFECTING UAV-BASED MINE SURVEYING ACCURACY Dmytro Polischuk1, Andrii Panasiuk1, Vasyl Mamrai1,2 1 Zhytomyr Polytechnic State University, 10005 Zhytomyr; E-mail: kgt_pds@ztu.edu.ua, kgt_pav@ztu.edu.ua, vmamray@gmail.com 2 Kütahya Dumlupınar University, 43100 Kütahya; E-mail: vmamray@gmail.com Corresponding author: kgt_pav@ztu.edu.ua ABSTRACT. The adoption of unmanned aerial vehicles (UAVs) for mine surveying has increased significantly within the extractive industry due to their high operational efficiency, ...

INTENSIFICATION OF THE PROCESS OF BENEFICIATION OF MINERALS BY VIBRATION-IMPACT ACTIVATION Yu. Svietkina, O. V. Fedoskina  Dnipro University of Technology, Dnipro, Ukraine Emails: svietkina.o.y@nmu.one,  fedoskina.ev@gmail.com Corresponding author: svietkina.o.y@nmu.one ABSTRACT. Experimental data are presented on the use of vertical vibrating mills (MVV) for the preparation of mineral feedstock for the beneficiation process. The influence of optimising the vibro-impact loading process on ...