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Recent Submissions

Inactivation of waterborne Klebsiella pneumoniae with ozone to diminish the risk of hospital effluents using an absorption-based process
(Elsevier, 2024) Correia Alonso, Sergio enmanuel; Pertegal Pérez, Víctor; Herraiz Carbone, Miguel; Lacasa Fernández, Engracia; Cañizares Cañizares, Pablo; Rodrigo Rodrigo, Manuel Andrés; Sáez Jiménez, Cristina
In this work, the inactivation of the waterborne antibiotic-resistance bacteria (ARB) Klebsiella pneumoniae (K. pneumoniae) has been evaluated to reduce the health risk in hospital environments by using an absorption process employing an ozone gas stream generated by commercially available electro-ozonizers (MIKROZON cell). The ozone mass flow generated in the gas stream ranges from 0.026 to 0.047 mg min-1 depending on the applied intensity (0.1, 0.25, or 0.5 A). The results show that the disinfection rate improves as the mass flow of ozone gas increases and is significantly influenced by the organic matter content of the target liquid solutions. Specifically, log reductions of 1, 4, and 6 were achieved at the end of the 180-min treatment of hospital urine when intensities of 0.1, 0.25, and 0.5 A were applied, respectively. In addition, the logarithmic removal of four Antibiotic Resistance Genes (ARGs) was investigated to control the spread of antibiotic resistance through horizontal transfer processes. Logarithmic removals of 5.43, 3.17, 3.04, and 2.89 were obtained for aac(6')-Ib, blaTEM, blaSHV, and blaKPC, respectively, during the treatment of urine (0.047 mg min-1 of ozone gas). A comprehensive comparison of the removal of these four ARGs with other disinfection technologies is also provided. It can be concluded that this work presents promising results that have the potential to increase the technology readiness level of the MIKROZON ozone generator, as it demonstrates the ability to enhance the disinfection process of highly organic liquid effluents.
Electrogeneration of H2O2 through carbon-based ink on Al foam for electro-Fenton treatment of micropollutants in water
(Elsevier, 2024) Rivera-vera , Camilo; Thiam , Abdoulaye; Salazar-gonzález , Ricardo; Rodrigo Rodrigo, Manuel Andrés; Sáez Jiménez, Cristina
In the present work, the catalytic efficiency of inks based on different carbon materials, namely activated carbon (AC), carbon graphite (CG), and carbon black (CB) was investigated for the oxygen reduction reaction (ORR). Additionally, we explored the feasibility of using this ink as a coating for an Aluminum foam (Alfoam) cathode in an electrochemical cell. The goal was to utilize this setup to produce hydrogen peroxide (H2O2) in the electro-Fenton (EF) process, targeting for treating water contaminated with contaminants of emerging concern (CECs).Among the materials investigated, all of them exhibited the ability to facilitate the ORR. However, AC proved to be the most suitable material due to its optimal balance between physical and electrocatalytic properties, thus enabling the formation of H2O2. When the different inks were applied to the surface of aluminum foam, it was observed that only the ink based on carbon black CB achieved a homogeneous distribution with the same ink quantity. As a result, it was observed that the Alfoam/CB electrode exhibited the highest H2O2 generation capacity, producing 45.6 mg L-1, followed by electro-generation of 5.1 mg L-1 using Alfoam/AC and 11 mg L-1 using Alfoam/CG. Furthermore, the application of Alfoam/CB in EF processes allowed for the almost complete degradation of 15 emerging contaminants of concern (CECs) present in secondary effluent. The innovative outcome of this study positions the developed technology as a promising and effective alternative for the treatment of water contaminated with CECs, demonstrating significant potential for industrial-scale application.
The electro-refinery in organics: A new arising concept for valorization of wastes
(Elsevier, 2023) Vieira Dos santos, Elisama; Martínez-huitle , Carlos a.; Rodrigo Rodrigo, Manuel Andrés
In the recent years, there is a significant effort in increasing the sustainability not only of industrial but also of environmental processes. New concepts arising from both the theory of the circular economy and application of life cycle assessment tools have made researchers and technicians to be ready for a change of paradigm in the electrochemically assisted waste remediation technologies. This opinion describes the innovative approaches faced recently into the new electro-refinery concept for organic wastes that will substitute in the near future the destructive-depollution technologies looked for until now. The aim of these recent strategies is to obtain high value-added compounds or brick molecules from the pollutants instead of favoring their mineralization during the treatment. States of the art of several of the most interesting attempts are going to be summarized in this opinion-critical review.
Virtual Special Issue 'Iberoamerican Applications of Electrochemistry across the World (IAEW)
(Elsevier, 2022) Sirés , Ignasi; Ponce de león , Carlos; Rodrigo Rodrigo, Manuel Andrés
Scientific progress, at an individual and institutional level, often requires a trade-off between cooperation and competition, and success is frequently limited by secrecy and unshared scientific advances. If properly managed, national, and transnational scientific and/or technological networks, may be remarkably effective tools for establishing a competitive edge through cooperation. The recent Excellence Networks in Spain, COST (Cooperation in Science and Technology) actions at a European level, and CYTED (Programa Iberoamericano de Ciencia y Tecnología para el Desarrollo) projects to promote the harmonic Iberoamerican development of science and technology, are exemplary of win–win initiatives.The Spanish Network of Excellence on Environmental and Energy Applications of Electrochemical Technology (E3TECH), funded by the Spanish Ministry of Science and Innovation through the projects CTQ2015-71650-REDT and CTQ2017-90659-REDT, was created following the initiative of the Specialized Electrochemistry Group of the Spanish Royal Society of Chemistry (GEE-RSEQ). E3TECH’s far-reaching ambition is to foster Research, Development and Innovation (R & D & I) within electrochemical science and technology, and to establish effective and fruitful synergies between academics and industry. E3TECH’s specific objectives are set in the context of two relevant applications of Electrochemistry, i.e., Environment and Energy, thus aiming to contribute to the sustainable development of society, in agreement with the Sustainable Development Goals (SDGs) established by the United Nations General Assembly in its 2030 Agenda. The 21 groups currently forming the Network have undertaken numerous actions together over the last 7 years, including the organization of online and live events for young students and senior researchers, as well as the publication of numerous specialized issues on different subtopics related to the aforementioned core topics.The VSI entitled “Iberoamerican Applications of Electrochemistry across the World (IAEW)” consists of selected papers from oral and poster contributors presented at the V Workshop of the E3TECH Network/I Online E3TECH Iberoamerican Workshop “Environmental and Energy Applications of the Electrochemical Technology” (V E3TECH). The Organizing Committee included five members from different Spanish institutions: Ignasi Sirés, (Universitat de Barcelona), Ane M. Urtiaga (Universidad de Cantabria), M. Ángeles Sanromán (Universidade de Vigo), Marta Pazos (Universidade de Vigo) and Rebeca Marcilla (IMDEA Energía). The Committee enjoyed the support of the GEE-RSEQ and the E3TECH Network members. The international event (28–31 October 2020) was held online due to the COVID-19 pandemic and was deemed a success, with 377 attendants and 160 oral/poster contributions (84 oral and 76 posters). The main objective of the workshop was to promote the work carried out by Spanish, Portuguese and Latin American researchers and companies, around the world, on the two rising applications of Electrochemistry. Hence, it was planned to serve as a fountainhead that could initiate potentially solid research collaborations between groups or offer an additional platform to exchange meaningful and fruitful experiences that could inspire other amidst such challenging circumstances prompted by the global pandemic.
Recent progress in physical and mathematical modelling of electrochemically assisted soil remediation processes
(Elsevier, 2022) Isidro Elvira, Julia; López-Vizcaíno López, Rubén; Yustres Real, Ángel; Sáez Jiménez, Cristina; Navarro Gamir, Vicente; Rodrigo Rodrigo, Manuel Andrés
This work reviews the recent progress in physical and mathematical modelling of electrochemically assisted soil remediation processes and focuses especially on those treatments that aim to remove organic pollution. It introduces the importance of modelling and simulation, not only to understand, but also to manage more efficiently the remediation of polluted sites. Special emphasis is taken in the information generated in the last five to ten years, trying to shed light on how the understanding of these treatments has improved in this period. To do this, two different sections introduce the main challenges in mathematical and physical modelling, merging in a final section, that shows the expected future trends in electrochemically assisted soil remediation modelling. Regarding physical modelling, the size of the installation used in the study and the novelty of the application of the technology have been used as the key inputs for this review. Regarding mathematical modelling, the inputs used to conduct the review have been the typology of numerical code, the processes included in the model and the way in which the electrolyte is considered in the model. Final remarks highlight the importance that modeling will take in the near future to increase the technology readiness level of these treatments and to promote their massive application to the remediation of polluted sites.