3D model of a Monolithic Honeycomb Adsorber for Electric Swing Adsorption for Carbon Dioxide Capture

The goal of this work was to develop a 3D model of Electric Swing Adsorption process for carbon dioxide capture from effluent gasses from power plants. Detailed 3D model of the composite honeycomb monolithic adsorber was developed for a single monolith channel and can be used to simulate and represent different physical properties: velocity, concentration and temperature. The advantage of this model is the fact that all physical properties and results can be presented visually in the 3D domain. COMSOL Multiphysics software was used for solving partial differential equations and simulations of adsorption and electrothermal desorption processes. Some simulation results are presented in this work. The results obtained from 3D simulations will be used for the adsorber model reduction to the 1D model which will be used for modeling and optimization of the whole ESA cycle due to its simplicity and computational demands. Simulation and optimization runs based on the 1D model will be performed in g-Proms software

Testing the electrochemical behavior of BPA on GC, WO3 and MWCNT electrodes

Bisphenol A (BPA) is an organic compound used in large scale at the plastics industry and as a precursor in the synthesis of polycarbonates and epoxy resins, which lead to frequent detections of BPA in surface waters. Therefore, it is necessary to develop and improve methods for BPA detection and monitoring. The electrochemical behavior of Bisphenol A at WO3 and carbon-based electrodes, like glassy carbon (GC) and multi-walled carbon nanotubes (MWCNT), were compared using cyclic voltammetry (CV). Therefore, WO3 nanoparticles were obtained by hydrothermal method and characterization was done using XRDP. The results showed that the responses of the WO3 electrode were 30 times larger compared to another examined electrode. This implies that WO3 electrode can be useful for the detection BPA in nature media

Kinetic study of degradation bisphenol a by fenton process

The degradation of bisphenol A in aqueous solutions using the Fenton reagents (H2O2 and Fe2+) was investigated. The molar ratio of the catalyst has been 1:50 (H2O2:Fe2+). The treatment experiment was performed for 300 min to evaluate the kinetics of this process. The kinetics data showed the best fit with the second-order kinetics model.31st International Conference Ecological Truth and Environmental Research : Sokobanja, Serbia, 18-21 June 2024

Advanced oxidation processes (AOPs) for wastewater treatment: bibliometric study

Advanced oxidation processes (AOPs) represent promising technologies for solving complex challenges in wastewater treatment, using powerful oxidants to degrade a wide range of pollutants. However, achieving a comprehensive understanding of the research landscape in this area is crucial. This paper presents a bibliometric analysis of publications related to AOPs for wastewater treatment, in order to map research trends, identify key contributors and highlight new areas of research. By analyzing data obtained from the Web of Science Core Collection using CiteSpace software, significant insights into publication trends and collaboration are revealed. Key results include the dominance of chemical engineering and environmental sciences as primary research categories. In addition, institutional contributions and author co-citations highlight the significant role of specific subjects and researchers. Furthermore, keyword analysis sheds light on prominent research topics, with degradation and wastewater treatment emerging as central themes. Cluster mapping identifies the main research points, highlighting wastewater treatment as a primary focus, followed by the development and application of photocatalytic methods and graphene oxide. This study provides valuable insights to guide future research directions and collaborative efforts to advance AOP-based wastewater treatment technologies.31st International Conference Ecological Truth and Environmental Research : Sokobanja, Serbia, 18-21 June 2024

Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants?

This paper presents a comparative analysis of three carbon-based electrodes: bare multiwalled carbon nanotubes (MWCNT), SnO2/MWCNT, and PbO2/graphene-nanoribbons (PbO2/GNR) composites, as anodes for the electrooxidative degradation of Rhodamine B as a model organic pollutant. Anodic electrooxidation of Rhodamine B was performed on all three electrodes, and the decolorization efficiency was found to increase in the order MWCNT < PbO2/GNR < SnO2/MWCNT. The electrodes were characterized by X-ray photoelectron spectroscopy (XPS) and linear sweep voltammetry (LSV). It was proposed that, in the 0.1 M Na2SO4 applied as electrolyte, observed decolorization mainly occurs in the interaction of Rhodamine B with OH radical adsorbed on the anode. Finally, the obtained results were complemented with Density Functional Theory (DFT) calculations of OH-radical interaction with appropriate model surfaces: graphene(0001), SnO2(001), and PbO2(001). It was found that the stabilization of adsorbed OH-radical on metal oxide spots (SnO2 or PbO2) compared to carbon is responsible for the improved efficiency of composites in the degradation of Rhodamine B. The observed ability of metal oxides to improve the electrooxidative potential of carbon towards organic compounds can be useful in the future design of appropriate anodes

New Strategies For Development Of Highly Selective Materials For Carbon Dioxide Capturective materials for carbon dioxide capture

Selective separation of CO2 is a field of intensive research due to emerging emissions from fire coaled and natural gas power plants. In the focus of development efforts is a design of regenerable CO2 capture material where adsorption technologies and advanced solid adsorbents are again in the centre of interest. Short screening of composite zeolite/activated carbon material in the terms of its selectivity for CO2 towards water is presented in this research. Adsorption rate of CO2 and H2O is determined and analysed at two different temperatures and equilibrium pressure of 3.5 kPa which corresponds to flue gases contents. The results imply the water should be removed from treated gas before CO2 separation and capture. Design of advanced materials can be facilitated by implementation of DFT calculations. A preview of DFT analysed materials with higher affinity for CO2 than for water adsorption is presented within this research. It underscores the possibility of defining future strategies for the design of novel carbon dioxide capture materials more resistant to water compared to currently used zeolites.29th International Conference Ecological Truth and Environmental Research – EcoTER’22" Sokobanja, June 21-24, 2022

Detection of bisphenol a intermediates during fenton process and prediction of reaction pathways

Bisphenol A (BPA), extensively used in the production of polycarbonate plastic and epoxy resin, poses significant threats to aquatic ecosystems and human health. Advanced oxidation processes (AOPs), which generate reactive species in situ, offer promising alternatives for wastewater treatment. Among these, the Fenton process, generating OH radicals, stands out. This study aims to explore the oxidative degradation of BPA by detecting its intermediates and elucidating its degradation pathway. Our findings reveal the existence of two interconnected degradation pathways. This study underscores the importance of advanced oxidation processes in mitigating the detrimental effects of BPA contamination, emphasizing the need for further research to optimize wastewater treatment methods and safeguard both ecosystems and human health.31st International Conference Ecological Truth and Environmental Research : Sokobanja, Serbia, 18-21 June 2024

Validation method for determination of PCB congeners in soil using GC-MS

Polychlorinated biphenyls (PCBs) are the most highly toxic species of POPs. More than 200 PCB congeners exist in nature. [1] PCBs are highly toxic for humans. They enter the human body via inhalation, ingestion or sorption through the skin and the bloodstream transports them to the organs, muscles and adipose tissues, where they are accumulated. This study presents the validation of analytical method for determination of 7 PCBs congeners in soil: PCB 28, PCB 52, PCB 101, PCB 118, PCB 153, and PCB 180. The method is based on solidliquid extraction with cyclohexane and the analysis by gas chromatography with mass spectrometric detection (GC-MS). [2] Samples were analyzed in SIM mode, and the analytes qualitative confirmation was performed comparing the mass spectra of analytical standards of PCB congeners with the NIST data base. The method developed can be applied in range from 0,005 to 10 mg/kg with the appropriate parameters of precision, accuracy, repeatability and linearity and can be used for simultaneous determination of low PCBs concentrations in different types of soil (agricultural, contaminated soil, etc.)

Investigation Of ZrO2 And ZrO2/TiO2 Electrodes By Cyclic Voltammetry

The subject of this study were electrochemical characteristics of transition metal oxide electrodes, consisting specifically of ZrO2 and TiO2, which have different crystallographic structure and lattice parameters. Metal oxides are a significant class of materials which have found vast applications in electrocatalysis. Composites of diverse semiconductors typically display much enhanced electronic conductivity and decreased charge transfer resistance. The goal of this study was to hopefully prepare and investigate electrodes with improved properties, through combination of heterostructures of chemically and structurally dissimilar and wide-bandgap semiconductors. Electroactive surface area was determined by employing cyclic voltammetry peak current method.29th International Conference Ecological Truth and Environmental Research – EcoTER’22" Sokobanja, June 21-24, 2022

Investigation Of Benzophenone-3 Electrochemical degradation On Titanium Electrode

Benzophenone - 3 is a well - known molecular UV filter, main- ly found in commercial cosmetic preparation for sunscreen and skincare. Due t o increased use of sunscreens, it could be found in surface water and wastewater, which could affect the water quality and human health. Research indicates that benzophenone - 3 act as endocrine disruptor and has a carcinogen- ic and mutagenic effect on humans and other living organisms. As such, poses a health risk to all living beings and need to be removed from the environment. Electrochemical techniques for wastewater treatment of organic pollutants show advantages over commercial techniques as practicality , safety, and simple application on both, small and large systems. Aim of the presented research is to examine the possibility of using titanium anode plates for electrochemical degradation of benzophenone - 3 in 0.05M aqueous sodium chloride solution. Elect rolysis was performed in galvanostatic mode at a current density of 25 mA cm - 2 . During 40 minutes of electrolysis, the degradation efficiency of benzo- phenone - 3 is 98.3 %. Additional studies of process kinetics show that degrada- tion of benzophenone - 3 follow s first - order kinetics.Contemporary Materials, Banja Luka Republic of Srpska, September 9-10, 2021