Sphalerite is a sulfide zinc mineral, which also contains supporting metals such as iron, copper and lead. In this work, we dealt with the extraction of iron from sphalerite in a new oxidation system. Manganese dioxide was used as the primary oxidant, and KI was used as a secondary oxidizing agent with the aim of creating an I2/I- oxidation cycle i...

By Miroslav Sokić, Dimitrije Anđić, Nikola Vuković, Ivana Jelić, Mladen Bugarčić, Vaso Manojlović, Aleksandar Jovanović

Water pollution by organic matters are in increase. Photocatalytic degradation of various pollutants presented in environment has promising future. Different materials have been applied in previous scientific works, while TiO2 based materials posse’s great physico-chemical characteristics. Therefore, researchers are constantly developing vari...

By Aleksandar Jovanović, Miroslav Sokić, Milica Mišić, Marija Simić, Mladen Bugarčić

  One of the new methods of anchoring steel structures is the use of large-scale buckling-restrained braces (BRBs) on the lateral system of this type of structures. This study investigates the behavior of BRBs and compares them with buckling braces. In this study, a two-dimensional frame with four stories and four spans was taken and analyzed...

By MOHAMMADAMIN ABDOLLAHZADEH, SHIMA SHAMEKHI

Quarries are surface mines where construction stone is exploatation and processed. Ensuring worker safety in quarries and preventing injuries are crucial for creating a safe working environment and maintaining a productive workplace. In this paper, the critical role and necessity of implementing preventive measures in the production and processing ...

By Ekrem Bektašević, Kemal Gutić, Mujo Valjevac, Noris Sakić

The changes in pH and conductivity during the rinsing of the pumpkin peel, and the biosorption of Cu2+ ions, were the subject of this work. The obtained data showed that the pH value of the solutions increased during the rinsing of the biosorbent, as a result of the transfer of H+ ions from the aqueous phase into the structure of the pumpkin peel. ...

By Marina Marković, Milan Gorgievski, Miljan Marković, Vesna Grekulović, Nada Štrbac, Milica Zdravković, Kristina Božinović

Specific environmental conditions, such as marine environments, often influence steel applications in marine industries. These conditions are commonly simulated using a NaCl solution in order to simplify the study and eliminate the complexities of seawater's chemical and biological variability. In this study, 42CrMo4 steel samples, a widely utilize...

By Stanica Nedović, Ana Alil, Sanja Martinović, Tatjana Volkov Husović

The Cu-Al-Zn alloy is used as a functional material in industry, and also as a biomaterial. These alloys have excellent electrical properties, good thermal conductivity, and can also be used for biomedical purposes.The basic characteristic of alloys that remember their shape is their independent return to some of their remembered shape when the tem...

By Safija Herenda, Merima Begović, Edhem Hasković, Vanja Asanović

Traditionally, the design of manufacturing technology and tool construction for metal forming processes relies on literature guidelines and the extensive experience of engineers. Today, the technology of deformation processing is in rapid development based on the application of computers, which enable extensive research and studies. This is also tr...

By Ibrahim Plančić, Amina Agić

Formability is the ability of a material to deform without fracturing, and the assessment of this property depends on various factors such as temperature, deformation speed, and stress state. There are two main approaches to determining formability: one is based on testing different materials under controlled stress conditions, and the other on dev...

By Ibrahim Plančić, Amina Ćurić, Amila Brkić-Omić

Because of their properties, superalloys are primarily used for the production of structural parts whose operating conditions correspond to elevated temperatures and often extremely aggressive environments. Because of that, they require a combination of high strength, good fatigue and creep resistance, and good corrosion resistance. Nimonic 80A is ...

By Raza Sunulahpašić, Almaida Gigovic-Gekic, Mustafa Hadžalić