Article
Chemistry, Physical
Tomas Prostejovsky, Martin Reli, Radim Zebrak, Tereza Konecna, Federico Salvadores, Milagros M. Ballari, Kamila Koci
Summary: Experimental study on the elimination of xylene using advanced oxidation process in a pilot plant demonstrated that xylene conversion decreases with increasing initial concentration and air flow rate. The mathematical model for the first step of the unit indicated that the main pathway of xylene elimination is through reactions with hydroxyl radicals. The pilot plant unit showed higher energy-cost efficiency for higher flow rates of waste gas, suggesting potential for the technology in removing organic compounds from the air with further studies needed.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jie Jiang, Na Xie, Yilan Jiang, Jinghua Han, Guoying Feng, Zhongbing Shi, Changtao He
Summary: A new strategy using laser-induced plasma as an alternative UV light source for the degradation of wastewater-based organic pollutants was established. The study found that the plasma effectively degraded the organic matter, with the degradation efficiency being related to the UV component with wavelength less than 400 nm. Metallic substrates, especially Fe, were found to enhance the proportion of UV light and accelerate the degradation efficiency.
Article
Food Science & Technology
Ming-Hsun Shen, Rakesh K. Singh
Summary: This study applied the advanced oxidation processes (AOP) combined with UV radiation and H2O2 solution to reduce aflatoxins in peanuts. The results showed that AOP treatment had a significant effect on reducing aflatoxins in milled peanuts, but not in whole peanuts. Drying treatment effectively removed residual H2O2 in peanuts.
FOOD AND BIOPROCESS TECHNOLOGY
(2022)
Article
Environmental Sciences
Akshay Kumar Dey, Soumya Ranjan Mishra, Md. Ahmaruzzaman
Summary: In this study, a novel nanocomposite, Zn-modified CeO2@biochar, was synthesized via a one-step sol-precipitation method to investigate its photocatalytic activity for the removal of methylene blue dye. The nanocomposite exhibited significant photocatalytic activity and highest degradation efficiency of 98.24% under direct solar irradiation of 90 min, at an optimum dosage of 0.2 g l(-1) catalyst and 10 ppm dye concentration, in the presence of 25% (V/V) 0.2 ml (4 mu l/ml) hydrogen peroxide. The improved photodegradation performance was attributed to the generation of hydroxyl radical from H2O2 during the photo-Fenton reaction process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Carlos Amor, Jose R. Fernandes, Marco S. Lucas, Jose A. Peres
Summary: This study evaluated and optimized the degradation process of elderberry wastewater using a UV-A LED system, transition metal activators, and different oxidants, achieving high TOC removal rates and increased biodegradability ratio in the PMS/Co2+ process.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Nathan Moore, Chengjin Wang, Susan Andrews, Ron Hofmann
Summary: UV/Cl and UV/H2O2 are compared in terms of their efficiency in the degradation of contaminants in water, with the hypothesis that UV/Cl becomes more competitive as TOC concentration increases at neutral-to-high pH. The results indicate that UV/Cl shows less decrease in reaction rate coefficients for certain contaminants compared to UV/H2O2 as TOC concentration increases, suggesting that UV/Cl may be more energy-efficient in a wider range of treatment scenarios than previously thought.
Article
Environmental Sciences
Alireza Gholizade, Gholamreza Asadollahfardi, Reza Rezaei
Summary: The study evaluated the UV-LED/chlorine process for removing RB19 dye, showing over 99% removal efficiency under optimized conditions. Compared to using chlorine alone, the combined UV-LED/chlorine process demonstrated significantly higher removal rates, indicating its effectiveness for dye degradation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Sulbha R. Kadam, Nilesh L. Jadhav, Aniruddha B. Pandit, Madhuri K. Pejaver
Summary: The degradation of Metribuzin in aqueous solution was systematically investigated using Hydrodynamic Cavitation (HC) and HC combined with Hydrogen Peroxide (HC+H2O2). The combined HC+H2O2 process achieved a significant degradation of Metribuzin to the tune of 70.92%, with a TOC removal of 22%. Energy efficiency was compared between HC and HC+H2O2 treatment, demonstrating the efficient employment of HC coupled with H2O2 for Metribuzin degradation.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Chemistry, Physical
Mouna Hamlaoui, Abouelkacem Sahraoui, Houssem Boulebd, Abdennour Zertal
Summary: In this study, acetone photolysis was compared with the UV/H2O2 process for the removal of three commercial textile dyes in aqueous solution. The results showed that UV/acetone exhibited better removal efficiency than UV/H2O2, with higher decolorization rates for all dyes. Scavenging tests revealed that different radicals were responsible for the degradation of dyes in the two processes.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Environmental
Lukasz Wolski, Kamila Sobanska, Adrian Walkowiak, Kamila Akhmetova, Joanna Grybos, Marcin Frankowski, Maria Ziolek, Piotr Pietrzyk
Summary: A new mixed niobium-cerium oxide (NbCeOx) catalyst was developed for efficient degradation of organic pollutants, showing high activity attributed to its mixed redox-acidic surface properties and synergy between niobium and cerium species. In degradation of methylene blue (MB) as a model pollutant, NbCeOx exhibited significantly higher activity compared to commercial Nb2O5 CBMM catalyst and CeO2.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Ines M. F. Cardoso, Rita M. F. Cardoso, Joaquim C. G. Esteves da Silva
Summary: Water quality management is a priority issue, with the need for new technologies to meet strict regulations and address challenges in limited water resources. Nanomaterials play a crucial role in advancing research on advanced oxidation processes.
Article
Engineering, Chemical
You-Yi Lee, Chihhao Fan, Fatima Haque
Summary: This study combined the Fenton process as pretreatment with the activated sludge process to efficiently remove aqueous Carbamazepine (CBZ). The hybrid combination system showed enhanced removal of CBZ, COD, and TOC. Biodegradable intermediates formed during the process were identified through EEM analysis. The degradation pathways of CBZ were explored using LC-MS analysis and literature studies. Therefore, using the Fenton process as a pretreatment can improve the treatment of aqueous CBZ.
Article
Energy & Fuels
Zahra Askarniya, Soroush Baradaran, Shirish H. Sonawane, Grzegorz Boczkaj
Summary: Decolorization of Ponceau 4R, Tartrazine, and Coomassie Brilliant Blue was studied using hybrid processes of hydrodynamic cavitation with potassium persulfate and hydrogen peroxide. The application of the dual oxidation system under cavitation conditions showed a synergetic effect, and the different decolorization values of the dyes could be explained by their different properties. The kinetic study revealed the highest first order rate constant for HC-KPS-H2O2, indicating the effectiveness of this combined process.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Chemistry, Multidisciplinary
Ines M. F. Cardoso, Rita M. F. Cardoso, Luis Pinto da Silva, Joaquim C. G. Esteves da Silva
Summary: UV-based advanced oxidation processes (AOPs) with a titanium(IV)-doped carbon dot catalyst were developed for the decomposition of an anthraquinone textile dye. The presence of the catalyst significantly increased the reaction rate.
Article
Chemistry, Multidisciplinary
Luiza Izabela Jinga, Gianina Popescu-Pelin, Gabriel Socol, Sorin Mocanu, Madalina Tudose, Daniela C. Culita, Andrei Kuncser, Petre Ionita
Summary: In this study, gold nanoparticles were deposited on titanium dioxide nanoparticles and the material was found to effectively degrade methylene blue dye in the presence of hydrogen peroxide. Longer exposure time and higher oxidant content led to up to 90% degradation of the dye. The material showed promising reusability without loss of activity.
Review
Chemistry, Analytical
Edmundo S. Valerio Neto, Caio V. S. Almeida, Flavio Colmati, Eduardo G. Ciapina, Giancarlo R. Salazar-Banda, Katlin I. B. Eguiluz
Summary: Pt nanoparticles are widely used as catalysts in low-temperature fuel cells. However, the high cost and limited supply of Pt have led to the search for alternative materials. Recent research has shown that Pt nanowires and their alloys offer a promising solution.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Fabien R. Climaco, Caio V. S. Almeida, Stephanie S. Aristides, Katlin I. B. Eguiluz, Giancarlo R. Salazar-Banda
Summary: In this study, the electrocatalytic activity of different catalysts toward ethanol oxidation was investigated using electrochemical and spectroelectrochemical measurements. The results showed that the addition of Ni-Fe to Pd catalysts enhanced their activity and stability, particularly for those with 30at.% of Ni + Fe. In situ FTIR data revealed that Ni and Fe favored the formation of acetate and acetic acid at lower potentials, while the core-shell catalyst produced these intermediates at the lowest potentials.
CHEMICAL PHYSICS LETTERS
(2022)
Review
Chemistry, Physical
Isabelle M. D. Gonzaga, Caio V. S. Almeida, Lucia H. Mascaro
Summary: Currently, the production and consumption of pharmaceuticals is growing rapidly, posing a threat to the environment and human health as emerging contaminants. Traditional methods of water treatment are ineffective in removing these complex, persistent compounds, which have been detected in surface water and drinking water globally. Advanced oxidative processes, particularly those using irradiation, have gained attention for their ability to efficiently degrade and mineralize organic compounds, improving water quality and enabling reuse. This review focuses on the recent advancements in irradiated AOPs for degrading pharmaceutical compounds, discussing various study parameters and highlighting the success of this technology while identifying areas for further research and development.
Article
Engineering, Environmental
Andressa J. A. Simoes, Aline R. Doria, Danielle S. Vieira, Luciane P. C. Romao, Giancarlo R. Salazar-Banda, Katlin I. B. Eguiluz
Summary: This study investigated the performance of a 3D mixed metal oxide anode produced by hybrid heating using microwaves in the electrochemical oxidation of ciprofloxacin. Compared to a 2D anode, the 3D anode showed superior electrocatalytic properties due to its larger surface area. The microfluidic flow-through reactor demonstrated the lowest energy consumption and could be a promising option for degrading recalcitrant organic compounds like ciprofloxacin.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Leandro R. Prado, Renan T. Figueiredo, Ronaldo S. Silva, Cristiano T. Meneses, Flavia M. R. Mendonca, Gustavo R. Borges, Claudio Dariva, Elton Franceschi, Giancarlo R. Salazar-Banda, Silvia M. Egues
Summary: Mesoporous titanium dioxide particles (TiO2) were synthesized through reactive precipitation using the supercritical anti-solvent (SAS) technique with carbon dioxide and the ionic liquid (IL) 1-methyl-3-octylimidazolium bis[trifluoromethylsulfonyl] imide, [C(8)mim][NTf2]. The particles exhibited anatase and brookite crystalline phases, with brookite peaks more pronounced in samples synthesized with the IL. The TiO2 particles had high surface area, controlled porosity, narrow pore size distribution, high thermal stability, and spherical morphology. The particle size decreased with the use of the IL and increased with a higher precursor/alcohol ratio.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Edmundo S. Valerio Neto, Caio V. S. Almeida, Haoliang Huang, Andrea E. E. Russell, Katlin I. B. Eguiluz, Giancarlo R. R. Salazar-Banda
Summary: The synthesis of Pt-Rh alloy nanowires without surfactants or templates was achieved by chemical reduction at room temperature. The Pt/C nanowires and Pt-Rh/C nanowires-nanoparticles catalysts were characterized and found to be more active for ethanol oxidation than the commercial Pt/C reference catalyst. The Pt-Rh/C nanowires also showed a higher specific activity compared to Pt/C nanowires and Pt/C reference catalysts after chronoamperometric tests.
Article
Electrochemistry
Dara S. Santos, Caio V. S. Almeida, Katlin I. B. Eguiluz, Giancarlo R. Salazar-Banda
Summary: The catalytic activity of Pdx@Pty/C core-shell nanoparticles for methanol electrooxidation was investigated. The core-shell nanoparticles exhibited good dispersion, small particle sizes, and a Pd-Pt-rich core with a Pt shell. The core-shell catalysts displayed improved catalytic properties compared to Pt/C catalysts, and the Pd0.3@Pt0.7/C catalyst achieved the highest catalytic activity.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Mechanical
Arley Alles Cruz, Fabio Cleisto Alda Dossi, Giancarlo Richard Salazar-Banda, Elton Franceschi, Gustavo Rodrigues Borges, Claudio Dariva
Summary: This study develops a new technique for monitoring inorganic scale based on electrical measurements in order to tackle scale formation in deep water oilfields. Synthetic water with similar composition to a pre-salt Brazilian oilfield was used for experiments, and two different methodologies for fouling formation were applied. The results show that the multiple-batch methodology increases the content of inorganic deposits on the electrodes and improves the system's output signal decay analysis. SEM-EDS studies validate the presence of fouling deposits and demonstrate the spatial distribution of the main scaling chemical elements.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Engineering, Chemical
Aline R. Doria, Angela Moratalla, Caio V. S. Almeida, Ronaldo S. Silva, Katlin I. B. Eguiluz, Giancarlo R. Salazar-Banda, Manuel A. Rodrigo, Cristina Saez
Summary: Developing highly selective anode materials for hypochlorite generation in low-concentrated sodium chloride solutions is challenging. In this study, ruthenium-based binary anodes (Ti/RuO2 -Sb2O4 and Ti/RuO2 -TiO2) were synthesized using different heating methods. The anode characteristics and catalytic activity were found to be influenced by the heating method and chemical composition. The Ti/RuO2 -TiO2 anode prepared by laser heating showed the highest electrocatalytic activity for generating hypochlorite from low-concentrated NaCl solutions. This study provides new insights into the preparation of low-cost materials for efficient disinfectant generation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Aline R. Doria, Isabelle M. D. Gonzaga, Gessica O. S. Santos, Caio V. S. Almeida, Deyvid C. Silva, Ronaldo S. Silva, Luciane P. C. Roma, Cristina Saez, Giancarlo R. Salazar-Banda, Katlin I. B. Eguiluz
Summary: Ti/RuO2-TiO2 anodes were prepared using unconventional heating methods involving CO2 laser and microwave irradiation. These anodes exhibited improved electrochemical properties compared to conventionally-prepared anodes, with increased voltammetric charge and decreased charge transfer resistance. The laser and microwave-prepared anodes also had longer lifetimes and high efficiency in generating hypochlorite and degrading ciprofloxacin.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Stephanie Soares Aristides, Caio Vinicius da Silva Almeida, Katlin Ivon Barrios Eguiluz, Giancarlo R. Salazar-Banda
Summary: In this study, NixFey@Pdz/C core-shell nanoparticles with different compositions were synthesized and it was found that the addition of Ni-Fe enhanced the catalytic activity of Pd in glycerol oxidation. Among them, the Ni1.5Fe13.5@Pd85/C catalyst exhibited the best electrocatalytic performance with a specific activity 1.28 times higher than that of Pd/C. In situ FTIR spectroscopy data revealed favorable formate and CO2 production on NiFe@Pd/C catalysts. The results highlight the synergistic effect of composition and core-shell morphology on catalytic activity.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Environmental Sciences
Raira Souza de Santana Castro, Aline Resende Doria, Fabio Costa, Silvana Mattedi, Katlin Ivon Barrios Eguiluz, Giancarlo Richard Salazar-Banda
Summary: The development of efficient and economically viable anode technologies is crucial for treating water contaminated with complex organic pollutants. The use of ionic liquids as solvents in the production of anodes has emerged as a promising alternative, with the calcination temperature playing a decisive role in the anodes' durability and electrochemical properties. Anodes prepared with dipropyl ammonium butyrate (DPA-Bu) at 350 degrees C exhibit higher stability and improved results in terms of organic compound degradation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
