TY - JOUR AU - Horváthné Drégelyi-Kiss, Ágota TI - Application Of Experimental Design Based Predictive Models And Optimization In Additive Manufacturing – A Review JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 52 PY - 2024 IS - 1 SP - 1 SN - 0133-0276 UR - https://m2.mtmt.hu/api/publication/34566018 ID - 34566018 LA - English DB - MTMT ER - TY - JOUR AU - Abdullah, Thamer Adnan AU - Al-Obaidi, Qusay AU - Abdulla, Thaer A. AU - Rasheed, Rashed T. AU - Al-Azawi, Khalda AU - Meharban, Faiza TI - A Critical Review of the Photocatalytic Degradation of Pharmaceutical Residues by a TiO2-Based Photocatalyst JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 65 EP - 75 PG - 11 SN - 0133-0276 DO - 10.33927/hjic-2023-20 UR - https://m2.mtmt.hu/api/publication/34564472 ID - 34564472 AB - Creating photocatalytic materials to generate clean energy and for ecological detoxification has been a challenge as far as meeting the worldwide demand for energy and cutting pollution is concerned. Anti-inflammatory medicines and pharmaceutically active chemicals (PhACs) are frequently found in wastewater. Since conventional wastewater treatment facilities do not completely remove these micropollutants (pharmaceuticals), alternatives are required. It is still difficult to make an inert and efficient nano-photocatalyst like titanium dioxide (TiO2). TiO2 photocatalysts have been extensively utilized as innovative photocatalysts for treating contamination because of their distinctive physicochemical characteristics, less toxic nature, biological inertness, improved energy efficiency, low-temperature reaction conditions, insolubility in water, easy accessibility, highly stable chemical nature and natural environmentally friendliness. However, their large band gap energy, that can only be generated under UV light and quickly with charge carrier recombination, restricts their photocatalytic applications. Its band gap energy was additionally decreased in order to be active in visible light in a variety of methods. Recent research developments concerning the TiO2-based heterostructure as a photocatalyst as well as its modifications, factors and removal method are summarized in this review which concludes with an overview and viewpoints on the present difficulties as well as fresh lines of inquiry in this developing field of study. LA - English DB - MTMT ER - TY - JOUR AU - Hülberné Beyer, Éva Anna AU - Nemestóthy, Nándor AU - Bélafiné Bakó, Katalin TI - Case Study of Continuous Itaconic Acid Fermentation by Aspergillus Terreus in a Bench-Scale Bioreactor JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 57 EP - 63 PG - 7 SN - 0133-0276 DO - 10.33927/hjic-2023-19 UR - https://m2.mtmt.hu/api/publication/34564462 ID - 34564462 AB - Itaconic acid (IA) is a highly important bioproduct. The traditional biotechnological production of organic acids generates large quantities of biomass and water streams as waste. Bipolar membrane electrodialysis is a suitable technique for directly recovering IA from clarified fermentation broth whereby itaconic acid is separated without chemical loading. As a result, the remaining diluate stream can be reintroduced into the fermentation process. This membrane operation can be integrated into a continuous fermentation process in order to carry out the process using a high glucose concentration in the effluent, opening up new possibilities for the implementation of continuous itaconic acid fermentation. In this study, a possible highly successful implementation of this technique is presented. The applied gentle stirring technique as well as the low dilution rate of 0.007 s-1 is necessary to be complemented by highly efficient oxygenation, thereby promoting itaconic acid generation. With an inlet supplying pure oxygen gas, the acid accumulated and an average of 30.1 g·L-1 titer of IA was achieved in the effluent. The volumetric oxygen uptake rate was monitored during the fermentation which fluctuated from 40-88% so further investigation of this may be worthwhile in the future. LA - English DB - MTMT ER - TY - JOUR AU - Elhoud, Abdu TI - Immersion Corrosion Tests to Evaluate Polyaspartic Coatings on Steel JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 51 EP - 56 PG - 6 SN - 0133-0276 DO - 10.33927/hjic-2023-18 UR - https://m2.mtmt.hu/api/publication/34564414 ID - 34564414 AB - In this study, a waterproof polyaspartic coating used for concrete structures was modified into an anti-corrosion coating system to prevent steel assets from corroding. A micaceous iron oxide barrier, a zinc phosphate corrosion inhibitor and a novel resin hardener were added to the polyaspartic coating. Its corrosion performance was assessed through immersion corrosion tests in 3.5% NaCl solutions at room temperature (RT) and 35 °C for 30 days. The surface finish of the steel samples was milled and blasted (SA 2.5). The coating was applied directly to the metal substrate. The average thickness of the coating was 220 ±10 µm. The experimental results confirmed the successful enhancement of the control coating on steel that was previously applied to concrete by adding a zinc phosphate corrosion inhibitor and micaceous iron oxide barrier. However, defects in the coating and rust on the substrate of the control coating were hindered by applying the developed coating. LA - English DB - MTMT ER - TY - JOUR AU - Iskander, Ben Rjiba AU - Sebestyén, Viktor AU - Tóth-Nagy, Georgina TI - The Role of Raising Awareness in Ensuring the Resilience of Cities JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 43 EP - 49 PG - 7 SN - 0133-0276 DO - 10.33927/hjic-2023-17 UR - https://m2.mtmt.hu/api/publication/34564354 ID - 34564354 AB - This paper explores the significant role of raising awareness in ensuring the resilience of cities towards climate change. Climate change is an imminent threat to urban development and its adverse effects can only be mitigated with the collective efforts of city dwellers. By evaluating the level of awareness and relating it to the greenhouse gas emissions emitted by three selected countries - namely Germany, Brazil and Kenya - this study highlights the need for awareness-raising campaigns and community-engagement initiatives centered around the risks of climate change and its potential impact on cities. The findings suggest that raising awareness, through several social action campaigns, can enhance the public understanding of climate change and facilitate the adoption of sustainable behaviors to reduce greenhouse gas emissions. Furthermore, raising the awareness of a population will make their participation in the decision-making processes of the different adaptation plans more effective. The paper concludes that raising awareness by enhancing public understanding and ensuring their participation in combating climate change is a crucial step in building resilience to climate change. LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Bianka AU - Miskolczi, Norbert AU - Eller, Zoltán TI - Evaluation of the Effect of Castor Oil-Based Experimental Additives on Pla/Starch Foils JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 35 EP - 41 PG - 7 SN - 0133-0276 DO - 10.33927/hjic-2023-16 UR - https://m2.mtmt.hu/api/publication/34564319 ID - 34564319 AB - Biodegradable packaging materials are attracting more and more interest nowadays, the primary driving force of which is the generation of enormous amounts of plastic packaging waste. The aim of this study was to investigate the effect of two castor oil-based experimental additives on the properties of foils made from incompatible biodegradable polylactic acid (PLA) and native starch (10-50 wt%). Differential Scanning Calorimetry (DSC) measurements and tensile tests were used. It was found that increasing the starch content affected the crystallization of PLA in the blends. Furthermore, since the additives did not significantly change the glass transition temperatures, the additives did not affect the mobility of PLA chains. Regarding the tensile tests, the tensile strength of the 60:40 PLA:starch longitudinal sample could be increased by approximately 10 and 6 MPa at 25 and -25 °C, respectively, when additives were introduced. LA - English DB - MTMT ER - TY - JOUR AU - Teniola, Oluwasanmi Samuel AU - Adeleke, Abraham A. AU - Ibitoye, Simeon Ademola AU - Shittu, Moshood Dehinde TI - Production of a Highly Concentrated Gold Solution from Aqua Regia Gold Leachate Using Sugarcane Bagasse Nanoparticles JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 27 EP - 33 PG - 7 SN - 0133-0276 DO - 10.33927/hjic-2023-15 UR - https://m2.mtmt.hu/api/publication/34423859 ID - 34423859 AB - This study produced a highly concentrated gold solution using nanoparticles (NPs) synthesized from sugarcane bagasse as an adsorbent for gold(III) recovery from an aqua regia gold leached lean solution. A 100 kg sample of gold ore collected from a mining site in Iperindo was concentrated. Mineralogical characterization and a fire assay test of the ore were carried out. Atmospheric and agitation leaching were conducted using aqua regia. Sugarcane bagasse NPs were prepared and used to study the gold(III) adsorption kinetics. Gold-loaded sugarcane bagasse NPs were desorbed in a 4 M aqua regia solution. The results revealed that the ore has a low water retention capacity which renders it friable. A microscopic examination established the presence of gold particles and pyrite in the ore. Ore leaching was eminently favoured by agitation yielding a weight loss of 6.3 % when an acid concentration of 4 M was used, the temperature was 90 ºC and the leaching time was 30 minutes. Synthesized nanocellulose was able to adsorb gold(III) from the leachate optimally with the following process parameters: 14 mL/g of adsorbent, 106.2 minute-long contact time, a temperature of 56 ºC and an agitation rate of 45 rpm when the concentration of leachate was 84 mg/L. The adsorption efficiency of the sugarcane bagasse NPs is comparable with that of commercial activated carbon, namely 92 and 95 %, respectively. The study concluded that NPs synthesized from sugarcane bagasse could be effectively used when upgrading gold and in purification processes. LA - English DB - MTMT ER - TY - JOUR AU - da Silveira, Pedro Henrique Poubel Mendonça AU - Gomes, Alaelson Vieira TI - Influence of Tic on Density and Microstructure of Al2O3 Ceramics Doped with Nb2O5 and Lif JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 21 EP - 26 PG - 6 SN - 0133-0276 DO - 10.33927/hjic-2023-14 UR - https://m2.mtmt.hu/api/publication/34423847 ID - 34423847 AB - Ceramic matrix composites are widely studied in the ballistic sector due to their high hardness, fracture toughness, and improved ballistic performance in multilayer shielding systems. However, the presence of dopants in ceramics can pose challenges during processing and potentially compromise the final properties of the sintered material. This study focused on the ceramic processing of Al2O3-based ceramic matrix composites by adding 4 wt.% Nb2O5 (niobium oxide), 0.5 wt.% LiF (lithium fluoride), and 38.5 wt.% TiC (titanium carbide). The composites were produced using cold uniaxial pressing and conventional sintering at 1400 °C for 3 h. The composites were characterized using Archimedes’ principle and scanning electron microscopy (SEM). The results revealed that the samples to which TiC was added exhibited low initial densities, indicating that the applied pressure of 50 MPa during cold pressing was insufficient to adequately densify the green bodies. Moreover, the presence of TiC led to a significant reduction in densification, making it challenging to apply a conductive coating for SEM analysis. Adjustments to the intensity of the electron beam were necessary to conduct the analysis successfully. Conversely, the samples to which TiC was not added exhibited high density values in the green state and yielded consistent results after sintering in line with previous research, indicating a satisfactory degree of sintering in the absence of TiC. These findings highlight the importance of carefully considering the addition of TiC in ceramic matrix composites during processing, which can have a significant impact on densification and subsequent material properties. The results contribute to the understanding of processing parameters with regard to the production of ceramic composites with desirable characteristics for ballistic applications. LA - English DB - MTMT ER - TY - JOUR AU - Bhanot, Lalitha AU - Kumar, Anuj AU - Shende, Diwakar AU - Wasewar, Kailas TI - Extraction of the Food Additive Tartaric Acid Using Octanol, Methyl Isobutyl Ketone, Kerosene, Mustard Oil, And Groundnut Oil JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 15 EP - 20 PG - 6 SN - 0133-0276 DO - 10.33927/hjic-2023-13 UR - https://m2.mtmt.hu/api/publication/34423829 ID - 34423829 AB - Tartaric acid (TA) is a dicarboxylic acid found in bananas, grapes, apples, papaya, cherries, pineapple, pears, mangoes, and tamarind. Due to its widespread use in the food, cosmetic and pharmaceutical industries, it is an essential carboxylic acid. Tartaric acid is produced commercially from wine-industry byproducts and is also present in the industry's effluent. Separating tartaric acid from wastewater is challenging. In this research, tartaric acid was separated from the aqueous phase using chemical and organic solvents such as groundnut oil, mustard oil, kerosene, octanol, and methyl isobutyl ketone (MIBK). Experiments were conducted at 298 K to determine the extraction efficiency (E%) and distribution coefficient (KD). The maximum extraction efficiencies of tartaric acid were found to be 49.01, 25.62, 16.73, 15.89 and 14.29% when using MIBK, octanol, kerosene, mustard oil and groundnut oil, respectively. The results demonstrate the significance of solvent choice in the extraction of tartaric acid with solvents such as MIBK and octanol being more effective at extracting TA from aqueous solutions. On the other hand, the sustainability of the method for separating tartaric acid was highlighted when organic solvents were applied. LA - English DB - MTMT ER - TY - JOUR AU - Lecheb, Samir AU - Daoui, Abdelhakim AU - Brihmat, Chahira AU - Mechakra, Hamza AU - Chellil, Ahmed AU - Safi, Brahim AU - Kebir, Hocine TI - Study of Composite Pipelines Damaged by Corrosion: Control by Non-Destructive Testing JF - HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY J2 - HUNG J IND CHEM VL - 51 PY - 2023 IS - 2 SP - 1 EP - 6 PG - 6 SN - 0133-0276 DO - 10.33927/hjic-2023-11 UR - https://m2.mtmt.hu/api/publication/34423826 ID - 34423826 AB - Since the degradation of material properties and defects often occur in engineering structures due to fatigue loading, it is necessary to develop non-destructive testing methods to assess the safety of engineering structures. In the aerospace industry in particular, the demand for early crack detection to ensure the safety and durability of engineered structures is growing. The automated inspection of pipelines using non-destructive testing (NDT) is desirable because visual inspections are not always consistent. In addition, automated inspections reduce the cost of the inspection process and improve its quality. Since the identification of cracks in engineering materials is very valuable for understanding initial and slight changes in the mechanical properties of materials in complex working environments, numerical simulations of propagating Lamb waves in a cracked pipeline were performed to study their non-linear behavior. Finally, the shapes of all the signal responses can be used to identify the depth, length, shape and orientation of cracks. The elapsed time before signal responses are received varies as a function of the orientation of a crack. LA - English DB - MTMT ER -