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Coupled action of ozone and UV radiation towards obtaining adipic acid from cyclohexane/one Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Adam A. Marek, Dawid Lisicki
A lot of research is constantly underway in the world to develop new or improve the current processes of the chemical industry to make them more effective and environmentally friendly. The described research on the oxidation of cyclohexane or cyclohexanone to adipic acid with a coupled action of UV radiation and oxygen–ozone mixture, instead of the currently used oxidation with HNO3, is part of this
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Liquid-liquid two phase-system stabilized by tween 40 and 80 surfactants: multiparametric study Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Halina Murasiewicz, Khrystyna Illienko
The purpose of this study was to investigate the impact of process parameters such as interfacial tension, type of surfactants, and their concentration on simple oil-in-water dispersion. Explored systems were prepared with 5% liquid paraffin oil and aqueous phase with emulsifiers Tween 40 of concentrations from 0.008325 mM to 0.025 mM and Tween 80 with concentrations ranging from 0.00375 mM to 0.011
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A Comprehensive Review on Graphene Oxide Based Nanocomposites for Wastewater Treatment Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 M.N. Mohammed, H.S.S. Aljibori, Muhsin Jaber Jweeg, Firas Al Oqaili, Thamer Adnan Abdullah, Oday I. Abdullah, Faiza Meharban, Rashed T. Rashed, Mustafa Aldulaimi, Khalida Al-Azawi
With the paramount development of industry and agriculture sector, levels of different pollutants like, heavy metal ions, pharmaceuticals, organic dyes, biological waste and other pollutants are becoming serious. The ecosystem and human health suffered greatly from the adverse effects of these pollutants. The disposal of these pollutants has become an urgent issue for the human society. Graphene oxide
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Synthesis, structural, thermal, and morphological characterization of Ru(III) complex with gatifloxacin and its utility to obtain RuO2 nanostructures Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Khaled Althubeiti
In this work, the reaction between the drug gatifloxacin (as a ligand) with Ru(III) ions was investigated and the resulting complex was structurally and morphologically characterized. The structural properties of the complex were assessed using elemental analyses, molar conductance, thermogravimetry, UV-Vis, and IR spectroscopies, where the morphological characteristics were evaluated using SEM-EDX
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Effect of calcination temperatures on optical and magnetic properties of FeWO4 nanoparticles Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Anh Q.K. Nguyen, Thi K.N. Tran, Bich N. Hoang, Ngo T.C. Quyen, Tai T. Huynh, Nguyen P. Yen, Bich N. Nguyen
Calcination temperature is a crucial parameter that can be easily controlled to induce a change in material properties. Herein, iron tungstate (FeWO4) was synthesized via a hydrothermal method using iron(II) sulfate heptahydrate and sodium tungstate dihydrate as precursors and calcined at the temperature between 300 oC and 700 oC. With increasing calcination temperature, the saturation magnetization
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Optimization of (2E)-3,7-dimethyl-2,6-octadien-l-ol (geraniol) transformation process parameters using Response Surface Method (RSM) Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Anna Fajdek-Bieda, Agnieszka Wróblewska
This paper presents the results of studies on the transformation of geraniol (GA) in the presence of the natural mineral bentonite. The paper determines the influence of temperature, catalyst content, and reaction time on the course of the process. In order to determine the most favorable process conditions, the catalytic tests were carried out without solvent and under atmospheric pressure. Three
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Characteristics and applications of iron oxides reduction processes Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 K.S. Abdel Halim, A.A. El-Geassy, M.I. Nasr, Mohamed Ramadan, Naglaa Fathy, Abdulaziz S. Al-ghamdi
The present review handles the main characteristics of iron oxide reduction and its industrial applications. The reduction of iron oxide is the basis of all ironmaking processes, whether in a blast furnace or by direct reduction and/or direct smelting processes. The reduction characteristics of iron ores control the efficiency of any ironmaking process and the quality of the produced iron as well.
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Enhancement of the corrosion resistance for stainless steel 316 by applying laser shock peening Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Sarah A. Jasim, Ammar Ayesh, A. Kadhim, Oday I. Abdullah
This research paper focuses on enhancing the surface characteristics of the 316 stainless steel (SS316) alloy, including roughness, microhardness, and corrosion resistance. Where the application of ND-YAG laser technology, a highly relevant and timely area, was investigated deeply. The Q-switching Nd: YAG Laser was used with varying laser energy levels within the context of the laser shock peening
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Modeling and experimental studies of carbon dioxide separation on zeolite fixed bed by cyclic pressure swing adsorption Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Tomasz Aleksandrzak, Kamila Zabielska, Elżbieta Gabruś
The paper presents the results of experimental and model studies of the pressure swing adsorption (PSA) process in a column with a zeolite 13X bed with a height of 0.5 m. The gas mixture consisted of CO2 (10–20%), N2, and H2O (RH 50%) in different ratios. As a result of the column tests, concentration, and temperature evolutions were obtained for each of the adsorption and desorption stages, which
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Synthesis, characterization, and molecular modeling of novel 1,3,4-oxadiazole derivatives of mefenamic acid Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Mashooq A. Bhat, Ahmed M. Naglah, Ahmed Hassan Bakheit, Mohamad A. Al-Omar
A novel series of 1,3,4-oxadiazole derivatives of mefenamic acid was obtained by reacting hydrazones of mefenamic acid with anhydrous acetic anhydride. The mefenamic hydrazones were obtained by reacting different substituted aldehydes with mefenamic acid hydrazide. All the compounds were characterized by spectral data and elemental analysis. Molecular docking studies of all the compounds were performed
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Evaluation of drops dimensions and rheological properties in production of multiple emulsion in a vessel Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-04-03 Marta Major-Godlewska
The structure and size of droplets of the inner phase of a multiple emulsion and rheological properties of the produced multiple emulsion are presented in this paper. The multiple emulsion was produced in a stirred vessel equipped with four baffles. In the study, two different stirrers: turbine impeller and Rushton turbine impeller were used. The liquids used in the produced multiple emulsion were:
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Study on Ajuga reptans extracts as potential cosmetic raw materials Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Anna Dziki, Magdalena Malinowska, Elżbieta Sikora
In the study, the possibility of an application of Ajuga reptans leaf and root extracts in antipollution cosmetics was investigated. The influence of Ajuga extracts on the skin condition was also evaluated. Both leaf and root Ajuga ethanolic extracts were obtained and added to the developed cosmetic formulations. Two types of emulsion W/O and O/W, washing gels and eye serum, containing as an active
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Degree of complexation of microelement ions by biodegradable IDHA chelator in water and simulated fertilization environment Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Ewelina Klem-Marciniak, Marcin Biegun, Krystyna Hoffmann, Józef Hoffmann
The degree of complexation of microelement ions by the biodegradable chelating agent - IDHA was examined in the work. The tests were carried out in water and in a simulated fertilizer environment. In order to compare the obtained results, tests were also carried out for the commonly used EDTA. The performed analyzes allow to determine the influence of the presence of compounds containing macroelements
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Glycerolysis-Interesterification of Palm Olein and Coconut Oil Blend using Two High-Shear Continuous Stirred Tank Reactors Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Aulia Safrina Ardani, Ria Millati, Rini Yanti, Nanda Legiasa Rabiul Tsani Rohana, Chusnul Hidayat
This study aimed to synthesize structured lipids containing high mono- and diacylglycerol by glycerolysisinteresterification of palm olein and coconut oil blend in two high-shear continuous stirred tank reactors in series. The result showed that various flow rates of 11 mL/min to 23 mL/min did not significantly increase mono- and diacylglycerol concentration, while at a flow rate of 26 mL/min only
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Influence of distillation time and distillation apparatus on the chemical composition and quality of Lavandula angustifolia Mill. essential oil Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Aneta Wesołowska, Dorota Jadczak, Karolina Zyburtowicz
In the study, the influence of distillation time as well as distillation apparatus on the chemical composition and quality of lavender (Lavandula angustifolia Mill.) essential oil were investigated. Two different types of distillation apparatuses: Deryng (popular in Poland) and Clevenger-type (recommended by European Pharmacopoeia) were used for the isolation of the essential oil from dried lavender
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Study on safe disposal of cephalosporins based on kinetic pyrolysis mechanism Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Jiangxue Fan, Meng Zhang, Xiaofei Hou, Fang Wang, Mengyuan Bai, Ruoxi Jiao, Zhongyu Yang, Erhong Duan, Fengfei Cheng, Wen Zhou
Based on the global goals for cleaner production and sustainable development, the pyrolysis behavior of cephalosporin residues was studied by TG-MS method. The influence of full temperature window on the safe disposal of residues was analyzed based on the “3-2-2” and “1+1” of thermal analysis kinetics, and the gas by-products of thermal degradation were monitored. Results showed that the pyrolysis
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Characteristics and applications of iron oxide reduction processes Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 K.S. Abdel Halim, A.A. El-Geassy, M.I. Nasr, Mohamed Ramadan, Naglaa Fathy, Abdulaziz S. Al-Ghamdi
The present review handles the main characteristics of iron oxide reduction and its industrial applications. The reduction of iron oxide is the basis of all ironmaking processes, whether in a blast furnace or by direct reduction and/or direct smelting processes. The reduction characteristics of iron ores control the efficiency of any ironmaking process and the quality of the produced iron as well.
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Experimental research on the removal characteristics of simulated radioactive aerosols by a cloud-type radioactive aerosol elimination system Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Jiqing Zhang, Ying Jia, Xiaomeng Lv, Tiedan Xiong, Yuanzheng Huang, Keke Shen
Radioactive aerosols in the confined workplace are a major source of internal exposure hazards for workers. Cloud-type radioactive aerosol elimination system (CRAES) have great potential for radioactive aerosol capture due to their high adsorption capacity, lack of cartridges and less secondary contamination. A CRAES was designed and constructed, and a FeOOH/rGO composite was directly prepared by a
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Numerical simulation and improvement of combustor structure in 3D printed sand recycling system Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Xiao Gao, Mao Lei, Weiwei Xu
In this paper, a new combustor with an output of 5 t/h is designed based on a computational particle fluid dynamics (CPFD) model. The flow field simulation is combined with the combustion simulation to analyze the internal two-phase flow, temperature field, and combustion products. The combustor structure was optimized. The simulation results show that the recovery efficiency of the waste sand and
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Isolation of citronellal and geraniol from citronella (Cymbopogon winterianus) oil by vacuum fractional distillation: Effect of operating conditions on the separation Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Minh-Trung Le, Duc-Phuong Vu, Thanh Ngoc Nguyen, Xuan-Tien Le
This study used fractional distillation to separate citronellal and geraniol from citronella (Cymbopogon winterianus) essential oil to improve their market value. The one-factor-at-a-time methodology investigated operating parameters’ optimum conditions and effects, including system pressure, packing types, and column height. All investigations were evaluated based on their main fraction’s citronellal
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Adsorption behaviour of polar solvent and water vapours on Sorbonorit B4 activated carbon Polish J. Chem. Technol. (IF 1.0) Pub Date : 2024-01-11 Dorota Downarowicz, Elżbieta Gabruś
In this work, the affinity of the heterogeneous Sorbonorit B4 (SB4) activated carbon toward methyl ethyl ketone (MEK), isopropyl alcohol (IPA), n-propyl alcohol (NPA) and isobutyl alcohol (IBA), and water vapours was examined. Adsorption equilibrium measurements demonstrate a higher adsorption capacity of water vapour than organic compounds at relative pressures above 0.4. The adsorption capacities
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Kinetic of Oil Sludge Thermolysis Process in Presence of Nickel, Cobalt and Iron-Supported Microsilicate Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Sairagul Tyanakh, Murzabek Baikenov, Ma Feng Yun, Tolkyn Khamitova, Nazerke Balpanova, Balzhan Tulebayeva, Aikorkem Kyzkenova, Aliya Karimova, N.Z. Rakhimzhanova, E.V. Kochegina
The article is devoted to the experimental determination of thermokinetic parameters of oil sludge thermal degradation using the model-free Ozawa-Flynn-Wall method in the presence of a nanocatalyst (nickel, cobalt and iron-supported microsilicate) by calculating Arrhenius kinetic parameters (activation energy and pre-exponential factor). The phase composition of the reflex microsilicate was established
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Synthesis of silver nanoparticles by aqueous extract of Zingiber officinale and their antibacterial activities against selected species Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Zawar Hussain, Muhammad Jahangeer, Shafiq ur Rahman, Tamanna Ihsan, Abid Sarwar, Najeeb Ullah, Tariq Aziz, Metab Alharbi, Abdulrahman Alshammari, Abdullah F. Alasmari
Silver nanoparticles have special plasmonic and antibacterial characteristics that make them efficient in a variety of commercial medical applications. According to recent research, chemically synthesized silver nanoparticles are harmful even in low concentrations. It was crucial to identify appropriate synthesis methods that may have low costs and be nontoxic to the environment. Zingiber officinale
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Mycoremediation of Heavy Metals Contaminated Soil by Using Indigenous Metallotolerant Fungi Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Muhammad Bilal Akram, Ibrar Khan, Mujaddad Ur Rehman, Abid Sarwar, Najeeb Ullah, Shafiq ur Rahman, Tariq Aziz, Metab Alharbi, Abdulrahman Alshammari, Abdullah F Alasmari
The present study was aimed to identify the indigenous fungal strains which could possibly be applied to the biore-mediation of heavy metal-contaminated soil. The contaminated soil samples of Korangi Industrial Estate Karachi were found to have total concentration of Cu 1.044 mgL1, and Pb 0.631 mgL–1. A total of eight indigenous strains of the fungus were isolated and screened for bioremediation capacity
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Design of a CPU Heat Sink with Minichannel-Fins & its Thermal Analysis Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Mehmet Emin Arzutuğ
In this paper, the design and the thermal analysis of a tribled microprocessor cooler combining the advantages of strong swirl flow and minichannel-fins and CuO nanofluid, have been presented. It is thought that the results will contribute to the understanding of the effects of parameters on the cooling flux of the heat sink and the decline at the microprocessor temperature, as Reynolds number in the
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CFD-DEM simulation of raceway size and mechanical characteristics of industrial scale blast furnace Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Yuzhen Gao, Choon Kit Chan
The raceway plays a crucial role in ensuring the stable functioning of the ironmaking blast furnace. It is the key site where the chemical reaction of coke combustion takes place, providing the necessary heat and reducing gas for the upper iron ore reduction process. Consequently, the size of the raceway serves as an essential indicator of the blast furnace’s operational condition. In this study, a
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Theoretical investigations into the Spectrophotometrically Analyzed Niobium (V)-6-Chloro-3-hydroxy-7-methyl-2-(2’-thienyl)-4H-chromen-4-one Complex Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Chetna Dhonchak, Nivedita Agnihotri, Mohammad Azam, Saleem Javed, Sambantham Muthu, Saud I Al-Resayes, Kim Min
Pentavalent niobium cation forms a stable yellow-colored binary complex with 6-chloro-3-hydroxy-7-methyl-2-(2’-thienyl)-4H-chromen-4-one (CHMTC) in the ratio of 1:2. The complex is quantitatively extractable into carbon tetrachloride from HClO4 solution maintained at pH 1.26–1.75 and strictly adheres to Beer’s law as verified by the Ringbom plot with an optimized range of determination as 0.385–1.211
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Influence of Effluent Quality from Sludge Dewatering on Electricity Consumption Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Michał Hyrycz, Marek Ochowiak, Andżelika Krupińska, Sylwia Włodarczak
During the dewatering process, centrate is produced, which is returned to the beginning of the technological system. The quality of the resulting centrate, and therefore the size of the returned load of pollutants, affects the demand for electricity in the process of biological wastewater treatment. The following study presents the results of centrate quality tests at five wastewater treatment plants
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Phytochemical composition and antioxidant activity of leaves extracts of Coleus forskohlii L. collected from Al-Leith Area, Saudi Arabia Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Manal Y. Sameeh
Background: wild Coleus forskohlii L. is a well-known traditional medicine for the treatment of many diseases because of its high forskolin content and several diterpenes. Objective: this study aimed phytochemical screening, finding of total phenolic content (TPC), total flavonoid content (TFC) and antioxidation activity of Coleus forskohlii L. leavse extracts in Al-Leith area, Saudi Arabia. Materials
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Influence of drying and granulation process conditions on the characteristics of micronutrient chelates granules Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Bernard Michałek, Katarzyna Bizon, Błażej Gierczyk, Tomasz Wilk, Magdalena Rapp
Fluidized-bed spray granulation (FBSG) enables manufacturing particles with desired characteristics, including particle size distribution (PSD), density, or dust content. This study investigated the effect of selected factors on the granules obtained in a continuous FBSG of chelated fertilizers for foliar applications. The effect of surfactant addition to the solution sprayed into the bed and perturbations
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Evaluating the Total Phenolic, Protein Contents, Antioxidant and Pharmacological Effects of Cynodon dactylon Extracts Against Escherichia coli and Staphylococcus aureus Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Muhammad Ibrahim, Moazama Riaz, Akbar Ali, Musarat Shaheen, Shafiq ur Rahman, Riffat Aziz, Abdulhakeem S. Alamri, Majid Alhomrani, Anas S Dablool, Saad Alghamdi, Manal Y. Sameeh, Manal A Tashkandi
The study was aimed to characterize the antioxidant and anti-microbial activities of Cynodon dactylon with special reference on its precise biochemical analysis. Physiological analysis that total carotenoids content (0.3884 ± 0.0172 mg/g), total chlorophyll content (6.1460 ± 0.2915 mg/g), total phenolic contents (13.4703 ± 0.1494 mg/g), chlorophyll a (3.7708 ± 0.1528 mg/g, catalase (CAT) contents (40
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Heat transfer in compact cross-flow mini heat exchanger Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Mateusz Prończuk, Aleksander Pabiś
This paper presents the results of an analysis of heat transfer in a cross-flow mini heat exchanger (CFMHE). The purpose of the paper was to analyze the results of the experimental measurements presented in the previous work in order to determine dimensionless correlations that allow for the calculation of heat transfer coefficients for the CFMHE. Analyzed CFMHE consisted of a brass cylindrical core
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Application of a modified method of humic acids extraction as an efficient process in the production of formulations for agricultural purposes Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Dominik Nieweś, Kinga Marecka, Magdalena Braun-Giwerska, Marta Huculak-Mączka
Due to their properties, humic acids (HA) can interact with macro- and micronutrients and retain plant nutrients in the soil profile. The aim of the presented work was to develop a new integrated 4-step process for the isolation of humic acids from peat with their simultaneous enrichment in macronutrients. The study demonstrated the possibility of replacing traditional solutions used in the extraction
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Numerical simulation of dense-phase pneumatic conveying in vertical pipe for gasifier Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-10-12 Yuzhen Gao, Choon Kit Chan
The stable transportation of pulverized coal in the vertical pipe is significant for the operation of the gasifier. There are few studies on the flow characteristics and flow pattern transition of particles in vertical pipes with small diameters. This paper has modeled and analyzed the flow characteristic of powder in dense-phase pneumatic conveying through 25 mm vertical pipe using CFD. Firstly, the
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Synthesis of isoamyl acetate using protein-coated microcrystals of different lipases Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Murat Türk
The goal of this study was the immobilization of different lipases as protein-coated microcrystals on K2SO4 and their uses in the synthesis of isoamyl acetate in n-hexane medium. The optimum conditions, such as lipase variety, temperature, the initial molar ratio of vinyl acetate/isoamyl alcohol, immobilized lipase amount, and reaction time were determined. The highest conversion was obtained when
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Optimization of production process of epoxidized soybean oil with high oxygen content through response surface methodology Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Fengyan Zhang, Yonglu Dong, Shudong Lin, Xuefeng Gui, Jiwen Hu
The epoxidation process of soybean oil (SBO) and peracid produced by 50 wt% hydrogen peroxide (H2O2) and formic acid (FA) was studied with sulfuric acid (H2SO4) as a catalyst. Three reaction parameters, including reaction temperature, FA-to-SBO ratio, and H2O2-to-SBO ratio, were investigated, along with the combined effect on oxirane value (OV). Based on response surface methodology (RSM), the Box-Behnken
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Synthesis and properties of chlorine and phosphorus containing rubber seed oil as a second plasticizer for flame retardant polyvinyl chloride materials Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Huabei Li, Xiaolin Wang, Xinding Yao, Hongying Chu
The synthesis of multifunctional plasticizer using rubber seed oil can increase its added value and expand the application field of plasticized products. Recent studies on bio-based plasticizers focus on bio-based raw materials but products lack functionality. In this study, flame retardant phosphate and chlorine were introduced into the chemical structure of rubber seed oil to synthesis a nitrogen
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Analysis of the effects of recycling on process control Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Cássio R.A. Silva, Victor C. Panuci, Monica R. Coutinho, Wagner A.S. Conceição, Cid M.G. Andrade
The union of different devices in order to obtain a specific response for a process is commonly called a control system. For a control system, it is necessary to have one or more controllers. Among the most used in the industrial sector are the PID and PI controllers. Next to these controllers is the control software. Scilab is a good example of control software. It is characterized as free code software
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Biopolymers based paper coating with promoted grease resistivity, bio-degradable and mechanical properties Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Karolina Wenelska, Tomasz Kędzierski, Klaudia Maslana, Krzysztof Sielicki, Anna Dymerska, Joanna Janusz, Grzegorz Marianczyk, Aleksandra Gorgon-Kuza, Wojciech Bogdan, Ewa Mijowska
The dominance of plastics in the packaging market is due to their low weight and thickness, which save transportation costs. However, their non-biodegradability poses a significant threat to the environment. Paper, on the other hand, is considered as a safer alternative due to its natural composition and biodegradability. The porous structure of paper limits its application in packaging, and its poor
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Gas hold-up analysis in an unsteady stirred vessel by means of infinite series Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Sebastian S. Frankiewicz, Szymon Woziwodzki
The use of a liquid level sensor made it possible to measure changes in gas hold-up over time in a stirred tank during unsteady mixing. These results were subjected to Fourier time series analysis and a model of gas hold-up changes in time was proposed. It allowed one to determine the model value of gas hold-up, which can be useful for characterizing gas hold-up during unsteady mixing and as a comparison
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Sustained Release of Drug Facilitated Through Chemically Crosslinked Polyvinyl Alcohol-Gelatin (PVA-GE) Hydrogels. A sustainable biomedical approach Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Shaukat Ali, Nazar Muhammad Ranjha, Bashir Ahmad, Ayaz Ali Khan, Fakhr Ul Hassan, Tariq Aziz, Metab Alharbi, Abdulrahman Alshammari, Abdullah F. Alasmari, Mousa Esa Alharbi
The present study aimed to prepare hydrogel based on polyvinyl alcohol (PVA) and gelatin (Ge) and characterization of PVA/Ge hydrogel for their potential use as a sustained drug delivery system. Polyvinyl Alcohol (PVA) and-Gelatin (Ge) were cross-linked using glutaraldehyde (GA) as a crosslinking agent and hydrochloric acid (HCl) as a catalyst. Different feed polymer ratio and crosslinking agent concentration
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Improvement in extraction and sensory properties of soapnut extract by fermentation Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Xuan-Tien Le, Tuong-An Tran-Thi, Kieu-Trang Phuong, Minh-Tam Nguyen-Kim, Tan Phat Dao
Sapindus saponins are potential biosurfactants that can widely be used to replace many chemical cleaning products. This study aimed to investigate the water extraction of saponins from the pericarps of Sapindus mukorossi and enhance the sensory properties of the extract by yeast fermentation. Extraction conditions including temperature, solid-to-liquid ratio, extraction time, and number of extraction
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Self-catalysed hydrogenation of heavy oil and coal mixtures Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-06-30 Suan Li, Zhenguang Sun, Qi Liu, Hang Ye, Kunpeng Wang
Coal liquefaction and heavy oil processing have become the urgent need for national energy strategic technology reserves in China. However, the inactivation of solid catalysts in these processes is an inevitable problem. Therefore, a self-catalysed method was proposed. The properties of raw oil could be changed by adding a modifier, as it has the function of self-catalysis, and the additional catalyst
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Synthesis and structure of new modified derivatives based on the quinine molecule and their biological activity Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-03-29 Gulim Mukusheva, Aigerym Zhasymbekova, Zhangeldy Nurmaganbetov
The relevance of the subject matter is conditioned by the constantly growing need to meet human needs in the field of medicine, in particular, the search, study, and further introduction of new types of medicines into practical use. The purpose of this study is to investigate the synthesis of modified quinine alkaloid derivatives, and their structure, to identify the properties and biological activity
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Extraction of rubidium ion from brine solutions by dicyclohexano-18-crown-6 / ionic liquid system Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-03-29 Dongfang Huang, Guixiang Ma, Peng Lv, Quanbao Zhou
Separation among rubidium and potassium ions from salt lake brines remains challenging. In this work, a typical room temperature ionic liquid 1-ethyl-3-metyhlimidazaolium bis(trifluoromethylsulfonyl)imide ([C2mim+][NTf2 –]) was used as diluent and synergistic extractant, dicyclohexano-18-crown-6 (DCH18C6) was used as extractant to extract rubidium ions from brine solutions which contain high concentrations
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Mechanism and optimum pressure for sliding-mode nanogenerator Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-03-29 Hang Yun, Ren He
Triboelectric nanogenerator has extensive applicability because of its capability of harvesting mechanical energy and flexible working modes. To research the optimum pressure and improve the recovered energy of the sliding-mode triboelectric nanogenerator, a contact model of the Al/PTFE tribo-pair is studied by ab initio calculation and finite element simulation. The F-atom of PTFE is proved to be
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Experimental research on the thermal properties of innovative insulation boards made of polyurethane-polyisocyanurate (PUR/PIR) Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-03-29 Karol Prałat, Justyna Ciemnicka, Piotr Jankowski, Ewa Wierzbicka, Arkadiusz Plis
In this work, the results of investigations of polyurethane materials were presented. Innovative materials based on polyurethane-polyisocyanurate (PUR/PIR) foam were obtained. Different types of additives (flame retardants, aerogels – additives that decrease thermal conductivity) are used in the composition of PUR/PIR foam. Foams are a type of composite composed of two phases: continuous (polyurethane
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Green method of conversion of geraniol to value-added products in the presence of selected minerals Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-03-11 Anna Fajdek-Bieda, Agnieszka Wróblewska, Andrzej Perec, Piotr Miądlicki
The study presents the results of research on the process of geraniol (GA) transformation in the presence of natural minerals: montmorillonite, mironekuton, halloysite and also in the presence of halloysite modified with 0.1 M water solution of H2SO4. To obtain information on the structure of the used catalysts, instrumental studies were performed (SEM, XRD, FT-IR, XRF, BET). The second part of the
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Fabrication of YSZ coatings on nickel-based alloys by anodic electrophoretic deposition Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-02-18 Yuan Binxia, Chen Tianzhong, Shang Yongzhi, Xue Haibo, Li Min
In the paper, YSZ coatings were prepared on nickel-based alloy substrates by anodic electrophoretic deposition. The YSZ suspension solution was obtained under stirring and ultrasonic treatment, in which the anhydrous ethanol and acetylacetone were used as the dispersion medium and ammonium polyacrylate was used as the dispersant of the suspension. The effects of different deposition voltage and deposition
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Encapsulation of hydroxycitronellal in β-cyclodextrin and the characteristics of the inclusion complex Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-02-18 Guangyong Zhu, Zuobing Xiao, Rujun Zhou, Junhua Liu, Guangxu Zhu
Hydroxycitronellal has been widely used in foods, beverages, perfumery and cosmetics. It can also be used to treat anxiety. The major drawbacks regarding the use of hydroxycitronellal are related to water insolubility, volatility, instability, and sensitization. To overcome these concerns, β-cyclodextrin was adopted as wall material to encapsulate hydroxycitronellal in this work. Hydroxycitronellal-β-cyclodextrin
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Effect of alkali metal promoters on catalytic performance of Co-based catalysts in selective hydrogenation of aniline to cyclohexylamine Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-02-18 Roman Valeš, Martin Zapletal, Jiří Krupka
In this study, a series of Co-based catalysts with alkali metal carbonate promoters were prepared to investigate the interrelation between promotion effect of these carbonates and catalytic performance for aniline hydrogenation to cyclohexylamine in vapour phase. The chemical promoters Li2CO3 and Na2CO3 leading to decrease in catalytic activity of cobalt catalysts for aniline hydrogenation. Catalysts
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Synthesis of nanoscale zero-valent iron doped carbonized zeolitic imidazolate framework-8 for methylene blue removal in water Polish J. Chem. Technol. (IF 1.0) Pub Date : 2023-02-18 Shuai Chen, Lemeng Qiao, Xuejiao Feng, Yufu Huang, Guilan Gao, Jie Guan, Donghai Lin
Nanoscale zero-valent iron-doped carbonized zeolitic imidazolate framework-8 (nZVI/CZIF-8) was prepared by carbonation of ferric nitrate and ZIF-8 at 800 °C and used as an adsorbent to remove methylene blue (MB) from water. The synthesized nZVI/CZIF-8 has a specific surface area of 806.9 m2/g, a pore volume of 0.86 cm3/g and an nZVI content of 1.35%, respectively. Both the nZVI/CZIF-8 and CZIF-8 have
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Synthesis of a polyester plasticizer from rubber seed oil for polyvinyl chloride Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Huabei Li, Xiaolin Wang, Hongying Chu, Xinding Yao
A polyester plasticizer (RSOP) for polyvinyl chloride based on rubber seed oil (RSO) was synthesized. Firstly, RSO monoglyceride were synthesized by the transesterification of RSO with glycerol at 220–240 °C. Secondly, RSOP was synthesized from RSO monoglyceride and adipic acid by esterification. The polyester plasticizer was characterized by GPC, FT-IR, 1H NMR and DSC. Plasticized polyvinyl chloride
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Influence of enzymatic pretreatment on yield and chemical composition of Rosmarinus officinalis essential oil Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Małgorzata Dzięcioł
Effect of enzymatic pretreatment before hydrodistillation process on yield and composition of Rosmarinus officinalis essential oil was studied. Results obtained by using two selected commercial enzymes applied in food and beverage industry were compared. Control process with non-enzymatic pretreatment in analogous conditions was also performed for proper interpretation of results. Application of gas
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Experimental research on the volatilization and condensation of ammonium bisulfate as SCR byproduct Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Kunling Jiao, Shuangchen Ma, Xiangyang Chen, Jiaming Liu, Lin Qiao
In this paper, the research progress of ammonium bisulfate (ABS) volatilization in coal-fired power plants the SCR denitrification process was reviewed. Combination with self-made experiments, SEM, flue gas analyzer and TG-DTG curves of ABS and ion chromatography. The volatilization and condensation characteristics of ABS were investigated carefully. Results show that as the temperature increased by
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Investigation of the co-processing technology of crude oil and coal and its deployment Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Suan Li, Qi Liu, Qingyu Deng, Hang Ye, Xuejie Zhou, Aijun Qiao
The effect of process conditions on the co-processing technology of crude oil and coal was investigated. Crude oil/coal matching performance, swelling degree, crude oil/coal slurry viscosity-temperature characteristics and process parameters were obtained via the laboratory scale and pilot scale studies. The optimum reaction temperature of the co-processing was 445~450 oC, the pressure was 19 MPa,
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Investigation and Prediction of ECMM characteristics of Hardened Die Steel with Nanoparticle Added Electrolytes Using Hybrid Deep Neural Network Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Vijayakumar Kanniyappan, Sekar Tamilperuvalathan
In our work, the process efficiency of the ECMM should be improved by using different combinations of nano-particles and added electrolytes. The superior aim of this work is to improve and predict the ECMM machining characteristics of die hardened steel, namely material removal rate (MRR), Tool wear rate (TWR) and Surface Roughness (Ra). The machining conditions are optimized using Response Surface
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Simultaneous photooxidation and photoreduction of phenol and Cr(VI) ions using titania modified with nanosilica Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Daria Kądziołka, Joanna Grzechulska-Damszel, Beata Schmidt
The photocatalytic process of phenol oxidation and Cr(VI) reduction in the presence of nano-silica modified titania was carried out. The activity of composites was tested using two different light sources. The photocatalysts with 10% of nanosilica showed the highest activity. The calcination temperature (200–800 oC) significantly determined the sensitivity of the obtained materials to the light source
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Treatment of wastewater from the production of meat and bone meal by the Fenton process and coagulation Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Agnieszka Makara, Zygmunt Kowalski, Piotr Radomski, Piotr Olczak
Wastewater from the production of meat and bone meal, due to the high load of organic matter and suspended solids, is a significant problem in the process of its treatment. In this work, we examined the method of treating this wastewater using coagulation with hydrogen peroxide and the Fenton process. Treatment variants included the use of variable Fe2+/H2O2 ratios of 1:5–1:30, variable doses of 3–18
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Corrosion process assessment using a novel type of coupon installation Polish J. Chem. Technol. (IF 1.0) Pub Date : 2022-12-27 Daniel Musik, Krzysztof Wójcik, Małgorzata Sekuła-Wybańska, Rafał Rakoczy
The main aim of this experimental study is to test the novel type of coupon installation. This set-up was used to carry out the corrosion process under aggressive conditions. Moreover, the effect of corrosion inhibitors on the scale-forming tendency was evaluated. The corrosive conditions were defined by using the Langelier Saturation Index (this index is an approximate indicator of the degree of saturation