INFLUENCE OF CURRENT DENSITY ON LEACHATE TREATMENT EFFICIENCY BY ELECTROCOAGULATION WITH ZEOLITE ADDITION
The electrocoagulation with zeolite addition was used to treat compost leachate. The effects of different current densities and zeolite particle sizes on electrode dissolution, electrode surface condition, and removal efficiency were investigated. The surface of the electrodes was analysed by optical microscope, while the consumption of the alumini...
By Nediljjka Vukojević Medvidović, Ladisav Vrsalović, Sandra Svilović, Mirjana Cestarić
REMOVAL OF HEAVY METALS FROM LANDFILL LEACH WATER USING PYROPHYLLITE AS ADSORBENT
Leachate water from sanitary landfills represents one of the most complex global environmental problems. This paper examines the possibility of using aluminosilicate material, pyrophyllite, from the Parsovići deposit, as an adsorbent. It was researched the influence of two granulations of pyrophyllite (0-53 μm and 0-100 μm) on the degree of a...
By Jasmina Kustura, Belma Halilhodžić, Enita Kurtanović, Amra Čizmić, Kenan Kozlo, Adnan Teletović, Atif Hodžić, Muhamed Harbinja
ADSORPTION OF Cu(II) IONS USING FOUNDRY WASTE
This article deals with the analysis of the adsorptive properties of the waste produced during the shot blasting of castings in foundries. During this process, particles of moulding mixture and scale that remained on the surface of the casting after removal from the mould are removed. Since this waste contains particles of moulding mixture (SiO2, c...
By Anita Štrkalj, Zoran Glavaš
CALCULATION OF THERMAL CONDUCTIVITY FOR CRYSTALLINE NANOSTRUCTURES
We have introduced a theory for the calculation of thermodynamic characteristics for some characteristic nanostructures (ultrathin films and superlattices), using the adapted method of two-time temperature Green's functions. In this paper, he has determined the coefficient of thermal conductivity using the definition of free energy and then compare...
By Siniša Vučenović, Jovan Šetrajčić
CATECHOLASE ACTIVITY AND SUBSTITUENT EFFECT OF NEW HOMOLEPTIC COPPER(II) CHALCONE COMPLEXES
Three new neutral complexes of copper(II) containing chalcone ligands derived from 2'-hydoxyacetophenone and 4-substituted benzaldehydes were synthesized. Complexes were prepared by solution synthesis and characterized by spectroscopy. The catalytic activity of complexes was examined in the reaction of 3,5-di-tertbutylcatehcol (DTBC) oxidation. The...
By Selma Hadžalić, Irnesa Osmanković, Adnan Zahirović
TELLURIUM MICROALLOYING OF AUSTENITE STAINLESS STEEL X8CrNiS18-9
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) is the most commonly used from the group of austenitic stainless steel in terms of machinability. This steel has high mechanical and working properties thanks to a...
By Derviš Mujagić, Omer Beganović, Belma Fakić
ON ONE ASPECT OF SUSTAINABLE MANUFACTURING Power Consumption vs Productivity
The paper presents one aspect of the analysis of energy consumption and productivity of the manufacturing operation. As an example of the operation, the operation of turning with a single-blade tool was taken. Sustainable development in its general concept implies sustainable materials, sustainable design, and sustainable manufacturing. This paper ...
By Edin Begovic, Ibrahim Plancic, Sabahudin Ekinovic, Vedran Mizdrak
EFFECT OF NANO-SILICA ADDITION ON PHYSICO-MECHANICAL PROPERTIES AND DURABILITY OF CONCRETE
This paper presents the results of an experimental investigation into the effect of nano-silica addition on the mechanical properties and durability of concrete. Three mixes of concrete containing 0%, 2%, and 4% nano-silica by weight of cement were tested. The slump of fresh concrete as well as compressive strength, dynamic modulus of elasticity at...
By Adnan Mujkanovic, Anesa Bitić, Marina Jovanović, Nevzet Merdić, Amel Zahirović, Amna Karić
PARTIAL REPLACEMENT OF CLAY “ČAVKA” WITH FLY ASH “STANARI” IN BRICK PRODUCTION
Fly ash class F from Thermal Power Plant “Stanari” was used in combination with highly plastic brick clay from Busovača to develop building bricks. The brick clay and fly ash were characterized for chemical and mineralogical composition, grain size distribution, and specific gravity. The fly ash has a higher proportion of larger particl...
By Marina Jovanović, Adnan Mujkanović, Nadira Bušatlić, Elma Selimović
INFLUENCE OF SIGMA PHASE ON GENERAL CORROSION OF AUSTENITIC STAINLESS STEEL
Austenitic stainless steel is mostly used at high temperatures. It is known that during heating of the austenitic stainless steel with increasing temperature and time of annealing a microstructure is changed i.e. there is the precipitation of carbides followed by precipitation of secondary phases as a sigma phase. The presence of the delta ferrite ...
By Amna Hodžić, Dejana Kasapović, Almaida Gigović-Gekić, Farzet Bikić, Raza Sunulahpašić, Hasan Avdušinović