The work aims to design a pyrophyllite-modified carbon paste electrode for pesticide detectionin aqueous solutions. The structural and morphological characterization of naturalpyrophyllite clay for Parsovići mine, Bosnia and Herzegovina, and mechanically modifiedpyrophyllite was performed using X-ray diffraction analysis (XRD), scanning electronmic...

By JASMINA GRBOVIĆ- NOVAKOVIĆ, ANĐELA MITROVIĆ_RAJIĆ, KATARINA TOŠIĆ, SARA MIJAKOVIĆ, SANJA MILOŠEVIĆ-GOVEDAROVIĆ, ANA VUJAČIĆ-NIKEZIĆ, BOJANA PASKAŠ-MAMULA, JASMINA KUSTURA, ENITA KURTANOVIĆ, BELMA HALILHODŽIĆ

We are currently witnessing the beginning of the global food crisis and disturbances in the fertilizermarket. On the other hand, on July 16, 2022, Regulation (EU) 2019/1009 of the EuropeanParliament and of the Council for laying down rules on the placing on the market of EU fertilizerproducts establishes strict rules on the safety and quality of fe...

By MILAN J. ADAMOVIĆ, JASMINA KUSTURA, ENITA KURTANOVIĆ, BELMA HALILHODŽIĆ, ATIF HODZIĆ, MUHAMED HARBINJA, MIRJANA D. STOJANOVIĆ

Pollution of the environment with heavy metals is one of the greatest contemporary problems. Pyrophyllite is a hydrous aluminum silicate, with a wide variety of applications due to its high melting point and stable chemical properties. This study aims to examine the sorption properties of the mechanochemically activated pyrophyllite for the removal...

By TATJANA M. TRTIĆ-PETROVIĆ, DAJANA LAZAREVIĆ, IRENA PUŠICA, JASMINA KUSTURA, BELMA HALILHODŽIĆ, ENITA KURTANOVIĆ, ADNAN TELETOVIĆ, ATIF HODZIĆ, MUHAMED HARBINJA

Occupational safety is a very important factor in the process of creating a safe work environment.The benefits employers, employees and even the state as a whole can reap greatly depend on theway occupational safety is organized and implemented. This paper aims to make a general analysisof the condition of safety at work in Bosnia and Herzegovina, ...

By MILIŠA TODOROVIĆ, ASMIR HELVIDA, SNEŽANA ŽIVKOVIĆ

Aluminium alloy foams are a form of porous metal whose structure resembles the shape of natural materials such as coral, bone, sponge, etc. Due to their structure, these materials retain good mechanical properties of the base material while being significantly lighter than non-porous metal. Metal foams can be used as energy and vibration absorbe...

By KARLA GRGIĆ, IGOR ĆULUM, BRANIMIR LELA, JURE KROLO, SONJA JOZIĆ

Titanium and its alloys, particularly Ti6Al4V, are widely used, especially in aerospace andmedicine due to their relatively low density, high strength, and good corrosion resistance. However,there are formidable challenges in casting, forming, and machining titanium alloys, which result infinal products that are considerably more expensive. Additiv...

By MATIJA ZORC, ALEŠ NAGODE, MAJA POGAČAR, BLAŽ KARPE, BORUT KOSEC, MILAN BIZJAK

This article deals with the analysis of the adsorptive properties of the waste produced during theshot blasting of castings in foundries. During this process, particles of moulding mixture andscale that remained on the surface of the casting after removal from the mould are removed. Sincethis waste contains particles of moulding mixture (SiO2, carb...

By ANITA ŠTRKALJ, ZORAN GLAVAŠ

The production of titanium is very expensive, so it is interesting to research technologiesthat require lower costs, such as the HDH hydrogenation-dehydrogenation processtechnology, which is used for cheaper powder production from the waste material oftitanium alloys.This paper presents the hydrogenation procedure of a recycled piece of the Ti6Al7N...

By AIDA IMAMOVIĆ, MIRSADA ORUČ, ŠABAN ŽUNA, ESAD HADŽIBULIĆ

The particle shape and size of the starting powders represent the most important physicalproperties, on which the quality of the compacts and final sintered products depends. Two types ofpowder were analyzed in the paper - electrolytic copper powder with a dendritic particle shape andwater-atomized copper powder with an irregular particle shape. Th...

By IVANA MARKOVIĆ, DRAGAN MANASIJEVIĆ, LJUBIŠA BALANOVIĆ, UROŠ STAMENKOVIĆ, MILIJANA MITROVIĆ, STEVAN TRUJIĆ

Low-melting alloys, based on bismuth, indium, and tin, have found commercial use in soldering,safety devices, coatings, and bonding applications, due to their low melting point temperature ofeutectic compositions and small differences between their liquidus and solidus temperatures.Based on this, the accurate knowledge of their thermal properties s...

By LJUBIŠA BALANOVIĆ, DRAGAN MANASIJEVIĆ, IVANA MARKOVIĆ, MILAN GORGIJEVSKI, UROŠ STAMENKOVIĆ, DAJANA MILKIĆ

Austempered ductile iron is the last addition to the group of ductile irons obtained by isothermalimprovement of classic ductile iron. Austempered nodular cast iron has improved mechanicalproperties and a different matrix microstructure compared to known iron-based castings. Thistype of casting is obtained by isothermal improvement - austempering, ...

By ADISA BURIĆ, BELMA FAKIĆ, EDIB HOROZ, HASAN AVDUŠINOVIĆ, RAZA SUNULAHPAŠIĆ

Steel cooling is an important technological operation because the final microstructure of the steel,and therefore its properties, depends on the cooling rate. The speed of steel cooling depends onnumerous factors, one of which is the movement of the cooling media. This paper presents theresults of testing the influence of mixing the cooling media o...

By ALMAIDA GIGOVIC-GEKIC, HASAN AVDUŠINOVIĆ, AMNA HODZIĆ, BRANKA MUMINOVIĆ

Gray cast iron belongs to the group of iron casts that contain graphite particles in the microstructure. Graphite particles in gray cast iron have the shape of lamellae and are connected to each other. The specific combination of properties of gray cast iron, which is satisfactory for many applications, and simple and cheap productio...

By ANIDA HENJAKOVIĆ, HASAN AVDUŠINOVIĆ, AMIR MUSLIĆ

Steel S690 QL is a high-strength quenched and tempered, fine-grained structural steel with a minimum yield strength of ReH of 690 MPa and with guaranteed toughness (Charpy) for rolled plates with a thickness of 3 to 50 mm. This paper presents the examination and analysis of the microstructure and grain size results after quenching an...

By MIRSADA ORUČ, AIDA IMAMOVIĆ, ALMAIDA GIGOVIC-GEKIC, MILENKO RIMAC

More recently modified stainless steels have been used to produce various structural elements that work in complex operating conditions. Stainless steel X8CrNiS18-9 (standard EN 10088-3: 2005) is the most commonly used austenitic stainless steel due to its good machinability. This steel has high mechanical and working properties than...

By DERVIŠ MUJAGIĆ, AIDA IMAMOVIĆ, MUSTAFA HADŽALIĆ

This paper describes the process of degradation of the structure of the inlet header of the intermediate reheater (MPr) 2 input header at the boiler of Unit 7 of the Thermal Power Plant Kakanj, determined on the basis of tests of replicas and hardness at characteristic places of the header. Headers, with minor delays, have been in co...

By ARMIN HUSIKA, BELMA FAKIĆ, MILENKO RIMAC

In this paper, C45 medium carbon tool steel was investigated after various heat treatments. The thermal properties, specifically thermal diffusivity and thermal conductivity, were measured and also the microstructure analysis was done on a light microscope. Heat treatment of the samples included: 1) the normalization heat treatment a...

By UROŠ STAMENKOVIĆ, IVANA MARKOVIĆ, SRBA MLADENOVIĆ, DRAGAN MANASIJEVIĆ, LJUBIŠA BALANOVIĆ, AVRAM KOVAČEVIĆ, MILAN NEDELJKOVIĆ, JOVANA BOŽINOVIĆ

The mechanical properties and microstructure of copper base shape memory alloys are relatively well known, while data on thermal properties (thermal conductivity, specific heat, and temperature conductivity) are not available. In the frame of our investigation work thermal properties of rapidly solidified Cu-Al-Ni-Mn alloy were deter...

By BORUT KOSEC, BLAŽ KARPE, MILAN BIZJAK, LADISLAV VRSALOVIĆ, DIANA ĆUBELA, MIRKO GOJIĆ, IVANA IVANIĆ, STJEPAN KOŽUH

Long-term exposure of superheater and steam intermediate superheater pipe materials to high temperatures in the operating conditions that prevail in thermal power plants leads to the appearance of the oxide layer.Oxide layer forms on the inner wall of the pipe, which acts as a heat insulator and reduces heat transfer through the pipe...

By BELMA FAKIĆ, ADISA BURIĆ, EDIB HOROZ

The paper describes the determination of the mechanical properties of the spherical floors of pressure vessels, obtained by the welding process and shaped by the process of gradual local deformation in the cold state, i.e. by the process of Incremental sheet forming (ISF). Spherical cylindrical bottoms are an integral part of most cl...

By MUSTAFA HADŽALIĆ, RAZA SUNULAHPAŠIĆ, ZLATAN IŠTVANIĆ

In order to examine the state of critical components of the boiler of Unit 5 of Kakanj Thermal Prema wer Plant, headers were tested in order to undertake appropriate technological measures and activities on the basis of insight into the current state of affairs, and to make recommendations for further exploitation. From first commiss...

By ARMIN HUSIKA, BELMA FAKIĆ, MILENKO RIMAC

Many alloys exhibit the shape memory effect, but only the Cu-Al-Zn, Cu-AI-Ni, and Ni-Ti alloysare presentand of commercial importance. The greatest use of these alloys is in biomedicine(filters, orthodontic implants, guide wires for catheters, etc.). Shape-memory alloys may be foundin sensors in automobiles, consumer products, and generally in smar...

By SAFIJA HERENDA, MERIMA BEGOVIĆ, EDHEM HASKOVIĆ, VANJA ASANOVIĆ

Metallic materials in granular packings show different electrical properties from their bulkcounterparts. In this paper, we investigate the temporal evolution of the electrical conductivity ofgranular metals. We use metallic beads arranged in different one-, two- and three-dimensionalensembles through which different constant currents are injected....

By MAJA ĐEKIĆ, AJLA KARIĆ, AMRA SALČINOVIĆ-FETIĆ, MELISA BAŽDAR, BELMA HUSKOVIĆ, DIJANA DUJAK, DIANA ĆUBELA

In the paper, the influence of the cutting conditions (cutting speed, feed, and depth of cut) duringthe machining of the cylindrical steel part on the surface roughness (average surface roughness-Ra) is analysed using experimental investigation. The material used in the full factorialexperimental investigation was C45 steel, a diameter of 50 mm, ma...

By TARIK GAZIĆ, SABAHUDIN EKINOVIC, EDIN BEGOVIĆ, IBRAHIM PLANČIĆ

Some specific aspects of metallurgy consulting in the industrial transition of Bosnia andHerzegovina are presented in this paper. The theoretical part of the paper is mostly concerned witha short overview of ZELJEZARA ZENICA cum ARCELORMITTAL-ZENICA (AMZ) product-mixand the facilities transition, as an example of the a.m. transition, although these...

By FAIK UZUNOVIĆ

Two clays from deposits located in the region of Central Bosnia, and kaolin obtained from a localspark plug and technical ceramics factory were calcined at 800, 900, and 1000 ºC. The pozzolanicactivity of calcined raw materials was determined using the P test. Calcined clay from the depositBilalovac showed slightly better reactivity compared t...

By MARINA JOVANOVIĆ, ADNAN MUJKANOVIC, NADIRA BUŠATLIĆ, NEDŽAD HARAČIĆ, AMINA ČAUŠEVIĆ

This paper examines the possibility of producing metallurgical cement type CEM III/A 42.5N at theKakanj Cement Factory. The tested samples contain respectively 46%, 41%, and 38% of granulatedblast furnace slag and the rest is clinker. According to the test results, all cement samples meet theEN 197-1 standard in terms of physical-mechanical propert...

By NEVZET MERDIĆ, NEDŽAD HARAČIĆ, ILHAN BUŠATLIĆ, NADIRA BUŠATLIĆ, ADNAN MUJKANOVIC

According to new EN 197-5 is possible to combine clinker with blast furnace slag, silica fume,pozzolana, fly ash, burnt shale, and limestone from 36 – 50% while clinker content should be from50 – 64%. In this paper are presented results of laboratory testing concerning CEM II/C-M(S+W) production where a sample is prepared by mixing 50% ...

By NEDŽAD HARAČIĆ, NEVZET MERDIĆ, ILHAN BUŠATLIĆ, NADIRA BUŠATLIĆ

The strength development of concrete containing ground granulated blast-furnace slag (GGBS), aby-product of iron in blast-furnace, as a partial substitute for cement,was experimentally studied.Levels of replacement of cement by slag were 12.5 %, 25 %, 37.5 %, and 50 % by weight ofcement. Slag taken immediately after it was discharged from the blast...

By ADNAN MUJKANOVIC, MARINA JOVANOVIĆ, NADIRA BUŠATLIĆ, AMEL ZAHIROVIĆ, ANESA BITIĆ, NEVZET MERDIĆ

We have introduced a theory for the calculation of thermodynamic characteristics for somecharacteristic nanostructures (ultrathin films and superlattices), using the adapted method of twotimetemperature Green's functions. In this paper, we have determined the coefficient of thermalconductivity using the definition of free energy and then compared t...

By SINIŠA M. VUČENOVIĆ, JOVAN P. ŠETRAJČIĆ

The translational symmetry of the distribution of atoms (ions) of the charge carriers (electrons orholes) system is broken by sputtering (doping),and due to the existence of two boundary surfaces.This is a model of high-temperature superconductors in which the observed symmetry breakingorthogonal to the CuO plane is treated as a perturbation. Singl...

By JOVAN P. ŠETRAJČIĆ, SINIŠA M. VUČENOVIĆ

Three new neutral complexes of copper(II) containing chalcone ligands derived from 2'-hydoxyacetophenone and 4-substituted benzaldehydes were synthesized. Complexes were preparedby solution synthesis and characterized by spectroscopy. The catalytic activity of complexes wasexamined in the reaction of 3,5-di-test-butyl catechol (DTBC) oxidation. The...

By SELMA HADŽALIĆ, IRNESA OSMAKOVIĆ, ADNAN ZAHIROVIĆ

Pyrophyllite (Al2Si4O10(OH)2) is a layered phyllosilicate mineral with a basic 2:1 crystal structure,consisting of an aluminum octahedral layer placed between two silicon tetrahedral layers (T-O-T),connected by weak Van der Waals forces, which results in easy structural disruption. Naturalpyrophyllite has an electroneutral surface, which causes a h...

By JASMINA KUSTURA, BELMA HALILHODŽIĆ, ENITA KURTANOVIĆ, KENAN KOZLO, AMRA ČIZMIĆ, ADNAN TELETOVIĆ, ATIF HODŽIĆ, MUHAMED HARBINJA

Leachate water from sanitary landfills represents one of the most complex global environmentalproblems. This paper examines the possibility of using aluminosilicate material, pyrophyllite, fromthe Parsovići deposit, as an adsorbent. It was researched the influence of two granulations ofpyrophyllite (0-53 μm and 0-100 μm) on the degree of adso...

By JASMINA KUSTURA, BELMA HALILHODŽIĆ, ENITA KURTANOVIĆ, AMRA ČIZMIĆ, KENAN KOZLO, ADNAN TELETOVIĆ, ATIF HODZIĆ, MUHAMED HARBINJA

In this paper, an analysis of the surface water and sediment of the Drina River was carried out.Samples were taken from different six locations along the course of the Drina River in Bosnia andHerzegovina. Selected heavy metals were determined in the sediment after acid digestion usingatomic absorption spectrometry - flame technique. The same metho...

By AIDA BILAJAC, SABINA ŽERO, AMAR KARADŽA

Heavy metals can enter into rivers through industrial and consumer waste, activities of acidic rainto soils, etc. Long-term exposure can result in damaging: mental and nervous function, bloodcomposition, lungs, kidneys, liver, and other vital organs. Estimating a health risk based on thecontents of heavy metals found in river Bosna was the aim of t...

By AIDA ŠAPČANIN, FARZET BIKIĆ

The electrocoagulation with zeolite addition was used to treat compost leachate. The effects ofdifferent current densities and zeolite particle sizes on electrode dissolution, electrode surfacecondition, and removal efficiency were investigated. The surface of the electrodes was analysedby optical microscope, while the consumption of the aluminium ...

By NEDILJKA VUKOJEVIĆ-MEDVIDOVIĆ, LADISLAV VRSALOVIĆ, SANDRA SVILOVIĆ, MIRJANA CESTARIĆ

Considering the toxic properties of heavy metals and their effects on the environment, there is anincreasing interest in studying their interactions with different ligands and searching forpossibilities to remove those ions from the environment. Compared to other ligands, crown etherspossess the highest selectivity as ligands for metal cations, due...

By EDITA BIJELIĆ, JASMIN SULJAGIĆ, MERSIHA SULJKANOVIĆ

Rutin belongs to the group of polyphenolic compounds, which consists of hormones, vitamins, andantioxidants in food. It is found mostly in plants and is one of the most biologically activeflavonoids. It can act as an antioxidant, antibacterial, and anti-inflammatory and can prevent theformation of a tumor. The concentrationof rutin was determined i...

By DEJANA KASAPOVIĆ, FARZET BIKIĆ

Hydrocracked base oil raw material (BORM) is the basis for the production of hydrocracked baseoils (HC-base oils) in the company „Modriča Oil Refinery“, which is engaged in the production ofHC-base oils, various motor and industrial lubricating oils, and lubricating greases. Theproduction of the mentioned HC-base oils consists of four p...

By AZRA HALILOVIĆ, ILHAN BUŠATLIĆ, ŠEFKIJA BOTONJIĆ, NADIRA BUŠATLIĆ, EDIN ZOLOTIĆ

Coal is the most important and widespread fuel sedimentary rock of organic origin. It is one ofthe main energy sources today and an industrial raw material for various products. Together withthe oil and other natural bitumens, it belongs to the group of fossil fuels or caustobiolite.Combustion represents one of the fundamental energy transformation...

By AZRA HALILOVIĆ, ŠEFKIJA BOTONJIĆ, AMILA KRNJIĆ, LAMIJA SUŠIĆ

In industries such as the chemical industry, the oil industry, the steel industry, and the pulp andpaper industry, energy systems are the basis of the production process and represent keyindicators of the profitability of the process. Energy efficiency in industry is long-term related totechnological development and the dynamics of renewal of produ...

By NUSRET IMAMOVIĆ, ARMINA ČAMIĆ, HARIS LEPIĆ

Particulate matter enters the atmosphere as a result of human activity, as well as natural processes.Since we still cannot influence natural processes, reducing the concentration of floating particlesis possible only by adjusting human activity. The emission of solid particles occurs during a largenumber of everyday activities. Depending on the act...

By AIDA ŠAPČANIN, AIDA HASANOVIĆ, FARZET BIKIĆ

The paper presents data on emissions of analyzed pollutants into the air (SO2, NOx, CO, VOC,NH3, PM10, PM2.5, PAH, Pb, Cd, and Hg) by sector (industry and energy, small combustion plants,road traffic and services-agriculture and animal husbandry), and by cities and municipalities inthe area of the Zenica-Doboj Canton. Based on the analyzed data, it...

By VEHID BIRDAHIĆ, MUVEDET ŠIŠIĆ, NUSRET IMAMOVIĆ, HALIM PRCANOVIĆ, MIRNES DURAKOVIĆ

The paper describes the research methodology of the heat generated by the biologicaldecomposition of a mixture of sludge from WTP (wastewater treatment plant) and biowaste and itsuse outside the system for a controlled biodegradation process. Earlier research in this area definedthe optimal mixtures of sludge and biowaste that ensure quality manage...

By MUVEDET ŠIŠIĆ, VEHID BIRDAHIĆ, SANELA BEGANOVIĆ, MIRNES DURAKOVIĆ, FARZET BIKIĆ

Wood is renewable, recyclable, climate-friendly material, and presents an important segment inachieving circular economy and sustainability concepts. To be able to link these two concepts,production and consumption systems need to transform towards sustainability. Wood-basedproducts play a role in mitigating climate change by reducing carbon from t...

By PETAR ĆURIĆ, JELENA OBRANKOVIĆ, ANDREJA PIRC-BARČIĆ