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6th International Conference Wastes: Solutions, Treatments and Opportunities, 2023

作者： Jorge, A.S. Almeida, M.F. Pinho, S. Faculty of Engineering University of Porto Portugal LEPABE - Laboratory for Process Engineering Environment Biotechnology and Energy Faculty of Engineering University of Porto Portugal

ISBN: (纸本)9781032384412

The aim of this study was recovering copper from Waste Printed Circuit Boards (WPCBs) using a hydrometallurgical process followed by copper electroextraction from the pregnant solution. Samples of WPCBs from obsolete computer were used. The leaching tests were carried out with two particle sizes: +1.00 mm to 1.40 mm and +0.850 mm to 1.00 mm, by percolation using an ammonia-ammonium sulphate system in the presence of hydrogen peroxide as oxidant. The copper leaching efficiency was 96.2% for the larger particle sizes and 98.4% for the smaller ones in both tests using stoichiometric conditions of 5 M NH3, 0.5 M (NH4)2SO4 and 2 M H2O2, a pH of 12. Copper recovered by electro winning was about 99.1%, but with co-deposition of zinc and nickel. © 2024 The Author(s).

关键词： Printed circuit boards

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Comparing circularity in municipal waste management systems: Porto & Lisbon 6th

Comparing circularity in municipal waste management systems:...

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6th International Conference Wastes: Solutions, Treatments and Opportunities, 2023

作者： Fonseca, A.R. Delgado, C.J.M. Berardi, P.C. School of Economics and Management University of Porto Porto Portugal LEPABE - Laboratory for Process Engineering Environment Biotechnology and Energy Faculty of Engineering University of Porto Porto Portugal

ISBN: (纸本)9781032384412

This paper examined how municipal waste management can be improved according to the principles of circular economy. An assessment of the development stages of the waste management systems was carried out. The qualitative method of comparative case study between the two waste systems of the largest urban regions in Portugal was applied. The main results show that these waste management companies have started circular economy measures. However, more work is needed to better align with the science behind the circular economy. The lack of information was one of the main limitations of this study. © 2024 The Author(s).

关键词： Waste management

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Critique – Tools for sharing

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Education for Chemical Engineers 2024年 49卷 93-94页

作者： Magalhães, Fernão D. LEPABE—Laboratory for Process Engineering Environment Biotechnology and Energy Faculty of Engineering University of Porto Rua Dr. Roberto Frias Porto4200-465 Portugal ALiCE—Associate Laboratory in Chemical Engineering Faculty of Engineering University of Porto Rua Dr. Roberto Frias Porto4200-465 Portugal

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Phenazines:Natural products for microbial growth control

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hLife 2024年第3期2卷 100-112页

The unprecedented problem of antibiotic resistance has become a major challenge for public health,which has contributed to an increase in infections caused by such *** microbial infections,typically biofilm-related,are alsocoupled to an increase in human mortality and ***,the demand for new antimicrobial agents hasincreased along with the evolution of microbial resistance *** products produced by bacteria,such as phenazines,have been recognized as an important source for the development of new antimicrobial agents,through the exploitation of their capacity to increase oxidative stress in other *** are a large groupof nitrogen-containing heterocyclic compounds and are essential for several cellular processes including iron acquisition,signaling events,enzymatic processes,and biofilm ***-inspired antibiotics(i.e.,2-bromo-1-hydroxyphenazine,2,4-dibromo-1-hydroxyphenazine,bromophenazine-21,phenazine-13,and phenazine-14)are veryactive against a wide range of gram-positive and gram-negative bacteria,including those associated with severe *** this study,mechanisms of phenazine-inspired antibiotics in the cellular processes of planktonic and sessilebacteria are ***,the application of phenazine-inspired antibiotics for the eradication of multidrugresistant planktonic and biofilm bacterial infections is also reviewed.

关键词： antimicrobial agents biofilms multidrug-resistant natural products phenazines

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Incorporation of phenolic extracts from different by-products in yoghurts to create fortified and sustainable foods

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Food Bioscience 2023年第1期51卷 816-826页

作者： Sara M.Ferreira Lúcia Santos LEPABE-Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr.Roberto Frias4200-465PortoPortugal ALiCE-Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr.Roberto Frias4200-465PortoPortugal

This work aimed to study and compare the effect of the incorporation of agro-industrial by-products(chestnut shell,grapeseed,and pomegranate peel)into yoghurts to fortify them while assessing their potential to replace synthetic *** each by-product,phenolic extracts were obtained and *** extracts demonstrated antioxidant and antibacterial properties,and the capacity to inhibitα-*** shell extract stood out regarding antioxidant capacity,displaying values of 1128 and 972 mgT_(rolox•gextract)^(-1),for the assays with DPPH and ABTS,*** yoghurts were produced(negative control,positive control with 0.1%of sorbic acid,two for each extract with 0.1%and 0.2%of extract,a mixture of extracts and a mixture of extracts with sorbic acid),and stored at 4℃.The incorporation of the extracts into the yoghurts maintained their physical-chemical properties and microbiological *** samples inhibited the growth of Escherichia coli and Staphylococcus *** analysis proved that higher concentrations of extract had similar results to synthetic *** results showed the viability to fortify yoghurts with the incorporation of by-product extracts,developing a value-added ***,revealed the possibility of these extracts replacing synthetic preservatives and antioxidants.

关键词： Antioxidants By-products Sustainability Circular economy Fortified foods Yoghurts Preservatives

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Phenazines:Natural products for microbial growth control

微生物与宿主健康（英文）

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微生物与宿主健康（英文） 2024年第3期2卷 100-112页

作者： Cátia A Sousa Marta Ribeiro Francisca Vale Manuel Simões ISEP/P.PORTO School of EngineeringPolytechnic of PortoPortoPortugal LEPABE-Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoPortoPortugal ALiCE-Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoPortoPortugal LEPABE-Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoPortoPortugal LEPABE-Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoPortoPortugal ALiCE-Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoPortoPortugal

The unprecedented problem of antibiotic resistance has become a major challenge for public health,which has contrib-uted to an increase in infections caused by such *** microbial infections,typically biofilm-related,are also coupled to an increase in human mortality and ***,the demand for new antimicrobial agents has increased along with the evolution of microbial resistance *** products produced by bacteria,such as phenazines,have been recognized as an important source for the development of new antimicrobial agents,through the exploitation of their capacity to increase oxidative stress in other *** are a large group of nitrogen-containing heterocyclic compounds and are essential for several cellular processes including iron acquisi-tion,signaling events,enzymatic processes,and biofilm ***-inspired antibiotics(i.e.,2-bromo-1-hy-droxyphenazine,2,4-dibromo-1-hydroxyphenazine,bromophenazine-21,phenazine-13,and phenazine-14)are very active against a wide range of gram-positive and gram-negative bacteria,including those associated with severe *** this study,mechanisms of phenazine-inspired antibiotics in the cellular processes of planktonic and sessile bacteria are ***,the application of phenazine-inspired antibiotics for the eradication of multidrug-resistant planktonic and biofilm bacterial infections is also reviewed.

关键词： antimicrobial agents biofilms multidrug-resistant natural products phenazines

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Strategies for mesoscale imaging of complex and scattering biomedical specimens 15

Strategies for mesoscale imaging of complex and scattering b...

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Biomedical Light Scattering XV 2025

作者： Rooney, L.M. Bottura, B. Baxter, K.J. Pereira, A.R. Simões, M. Battistella, E. Francis, R. McHugh, R. Christopher, J. Roe, A.J. Bauer, R. McConnell, G. University of Strathclyde Glasgow United Kingdom LEPABE-Laboratory for Process Engineering Environment Biotechnology and Energy Faculty of Engineering University of Porto Rua Dr. Roberto Frias Porto4200-465 Portugal South Mimms Hertfordshire United Kingdom School of Infection and Immunity University of Glasgow Glasgow United Kingdom

ISBN: (纸本)9781510683884

The Mesolens offers a powerful approach to mesoscale imaging, enabling high-resolution visualization of complex, scattering biomedical specimens. Unlike traditional microscopes, which often struggle to balance resolution and field of view, the Mesolens allows for both large-scale imaging and detailed subcellular-level analysis. This makes it ideal for examining large tissues or entire organisms while preserving the ability to resolve individual cells and subcellular structures. It employs an innovative lens system with a high numerical aperture, allowing for deep tissue imaging with minimal aberration, even in scattering samples such as thick biological tissues. Key applications include imaging complex specimens such as mature colony biofilms and ultrathick sections of tissue, where the ability to see both the overall architecture and microscopic details is critical. This technology marks a significant advancement in biomedical imaging, combining high throughput with fine detail. © 2025 SPIE.

关键词： Medical imaging

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Liquid phase persulfate-based oxidation for the treatment of a toluene waste gas stream – Parametric study

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Chemosphere 2025年 378卷 144376页

作者： Alves, Ana S.P. Rodrigues, Carmen S.D. Madeira, Luís M. LEPABE - Laboratory for Process Engineering Environment Biotechnology and Energy Faculty of Engineering University of Porto Rua Dr. Roberto Frias Porto4200-465 Portugal ALiCE – Associate Laboratory in Chemical Engineering Faculty of Engineering University of Porto Rua Dr. Roberto Frias Porto4200-465 Portugal

This study aimed to assess the degradation and mineralization of the toluene present in a gas stream by application of a liquid phase persulfate-based advanced oxidation process in a bubble column reactor. Up to the authors' knowledge, this is the first time where the oxidizing agent has been activated through the presence of transition metal ions and pH change, to treat a toluene-containing gas stream. A detailed parametric study was performed, with the objective of analyzing the effect of some of the main operating variables in the process performance, varying parameters such as catalyst concentration (from 0 to 0.27 g/L of Fe2+), oxidizing agent dosage (0.80 - 2.40 g/L of S2O82−) and initial pH (from 2.0 to 6.8). The best treatment performance was achieved for the following operating conditions: [Fe2+] = 0.20 g/L, [S2O82−] = 1.70 g/L and initial pH = 3.0, with the process being extended for 6 h before saturation of the liquid with toluene. Under these conditions, the toluene transferred from the gaseous effluent to the liquid phase, wherein it was then degraded by the radicals, reached a value of 7.8 x 10−2 mol/L, showing an improvement of 13 times when compared with toluene solubility in water;still, it was found that under the optimum acidic conditions, sulfate radicals have a higher contribution than hydroxyl radicals for the oxidative process. Finally, it was evidenced that the amount of toluene transferred almost duplicated when compared to other studies reported in the literature that applied Fenton's reaction to degrade toluene. © 2025

关键词： Gaseous effluents

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Co-Pyrolysis of Brown Macroalgae and Pinecones in a Fixed Bed Reactor 11th

Co-Pyrolysis of Brown Macroalgae and Pinecones in a Fixed Be...

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11th International Conference on Energy and Environment Research, ICEER 2024

作者： Silva, Felipe T. Nascimento, Mariana Pilão, Rosa M. Neto, Paula Ribeiro, Albina M. CIETI ISEP Instituto Politécnico do Porto Rua Dr. António Bernardino de Almeida 431 Porto4200-072 Portugal LEPABE—Laboratory for Process Engineering Environment Biotechnology and Energy Faculty of Engineering University of Porto Rua Dr. Roberto Frias Porto4200-465 Portugal ALiCE-Associate Laboratory in Chemical Engineering Faculty of Engineering Faculty of Engineering University of Porto Rua Dr Roberto Frias Porto4200-465 Portugal

ISBN: (纸本)9783031824067

Due to increasing energetic demand, the search for alternative energy sources has increased considerably. Biomass, among other alternatives, has been chosen as a solution, because it can be converted into gas, liquid, and solid phases through several processes. This study presents results on the slow co-pyrolysis of Laminaria digitata (LD) and pinecones (PC), at an average temperature of 560 °C, for mass ratios LD/PC of 100/0, 50/50, 30/70, 10/90 and 0/100. In addition, a thermogravimetric analysis was performed for PC and LD. The biochar yields varied from 35.3 to 31.2%, for bio-oils, the yields were in the range of 23.3–39.9%, and for the gas phase, between 41.4 and 28.9%, as the amount of PC increased in the feeding mixture. The biochars were characterized in terms of proximate analysis and higher heating value (HHV). The properties of bio-oils that were determined included pH, density and HHV, as well as identification of compounds by infrared analysis. CO2, CO, CH4 and H2 were identified in the gas phase of all the experiments by gas-chromatography, but the most produced gas was CO2, followed by CO. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Thermogravimetric analysis

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Self-discharge mitigation in a liquid metal displacement battery

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Journal of Energy Chemistry 2022年第3期31卷 390-396,I0011页

作者： Kashif Mushtaq Ji Zhao Norbert Weber Adelio Mendes Donald R.Sadoway Department of Materials Science and Engineering Massachusetts Institute of Technology77 Massachusetts AvenueCambridgeMA 02139-4307United States LEPABE-Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr.Roberto Frias4200-465 PortoPortugal Department of Mechanical Engineering School of Mechanical and Manufacturing EngineeringNational University of Sciences and TechnologyH-12IslamabadPakistan Helmholtz-Zentrum Dresden-Rossendorf Bautzner Landstr.40001328 DresdenGermany

Recently,a disruptive idea was reported about the discovery of a new type of battery named Liquid Displacement Battery(LDB)comprising liquid metal electrodes and molten salt *** cell featured a novel concept of a porous electronically conductive faradaic membrane instead of the traditional ion-selective ceramic *** are attractive for stationary storage applications but need mitigation against *** the instant battery chemistry,Li|LiCl-PbCl_(2)|Pb,reducing the diffusion coefficient of lead ions can be a way forward and a solution can be the addition of Pb O to the *** latter acts as a supplementary barrier and complements the function of the faradaic *** remedial actions improved the cell’s coulombic efficiency from 92%to 97%without affecting the voltage *** addition,the limiting current density of a 500 m Ah cell increased from 575 to 831 m A cm;and the limiting power from 2.53 to 3.66 ***,the effect of Pb O on the impedance and polarization of the cell was also studied.

关键词： Liquid displacement battery Liquid metal battery High-temperature battery Faradaic membrane ZEBRA battery Electrolyte additives

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