Publicações - engenharias
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AMARO BITTENCOURT, GUSTAVO;
PORTO DE SOUZA VANDENBERGHE, LUCIANA;
VALLADARES-DIESTRA, KIM KLEY;
ZWIERCHECZEWSKI DE OLIVEIRA, PRISCILLA;
CABRAL, PALOMA SOUZA;
CABRAL, PALOMA SOUZA
Palavra-chave:
Processos Biotecnologicos
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações
resumo ...
The main objective of this study was to develop a citric acid-catalyzed hydrothermal pretreatment to reach the maximum sugar recovery from soybean hull (SH), in the context of a biorefi nery concept. A central composite design (CCD) was used to optimize pretreatment conditions through the analysis of citric acid concentration, time, and temperature effects. Optimized conditions were defined as 3.56% w/w, 46.1 min, and 135.7 °C. From the solid fraction, 99.5% and 83.0% of glucose and xylose conversion, respectively, were obtained after enzymatic hydrolysis. Sugars were fermented successfully to L-lactic acid by Lactobacillus pentosus. In fact, SH hydrolysate presented no trace of inhibitor compounds, and glucose was totally consumed during fermentation. After 24 h of fermentation, a conversion rate of 0.724 g/g of sugars to lactic acid and 80.5% of the stoichiometric theoretical yield were reached. In addition, from the liquid fraction, 47.8 mg/g of xylooligosaccharides (XOS) was produced. This work demonstrates the potential of SH to be exploited as feedstock, with mild and efficient pretreatment process, for medium- to high-value bioproducts production in biorefineries.
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Fernanda Avelar Santos;
Adriana Ahrendt Talamini;
Lázaro valentin Zuquette;
Renata Marianne Santos Pezzi;
Rodolfo José Angulo;
Maria Cristina de Souza
QUATERNARY AND ENVIRONMENTAL GEOSCIENCES,
v. 15,
n. set. 2024,
p. 71-84,
2024
Palavra-chave:
Chuvas extremas;
Ilha Vulcânica;
Processos erosivos;
Dinâmica e Evolução da Paisagem
Áreas do conhecimento:
Ciências Exatas e da Terra; Cartografia Geotécnica;
Engenharias; Engenharia Civil; Geotécnica; Geotecnia Ambiental
resumo ...
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MAZEGA, ANDRÉ;
Montserrat Fortuny;
SIGNORI-IAMIN, GIOVANA;
AGUADO, ROBERTO J.;
TARRÉS, QUIM;
Alexandre Ferreira Santos;
DELGADO-AGUILAR, MARC
Palavra-chave:
MicroNIR;
nanocelulose;
Carboxílico;
Quimiometria
Áreas do conhecimento:
Engenharias; Operações Industriais e Equipamentos para Engenharia Química;
Engenharias; Engenharia Química; Processos Industriais de Engenharia Química; Processos Biotecnológicos
resumo ...
The regioselective oxidation of the primary hydroxyl groups of cellulose, usually mediated by the (2,2,6,6-tetramethylpiperidin-1-yl)oxyl radical (TEMPO), is highly popular in the scientific literature. However, the lack of efficient monitoring techniques imposes a severe limitation to its upscaling. This work involves a portable, user-friendly near-infrared spectroscopy device, optimized preprocessing techniques, and multivariate calibration to quickly estimate the carboxyl group content of modified cellulose (i.e., the extent of the oxidation). For that, bleached pulps from eucalyptus, pine, hemp, and sisal were submitted to TEMPO-mediated oxidation, varying the dosage of spent oxidizer (NaClO) and thus attaining samples of different values of carboxyl group content. These values were related to near-infrared spectra (908–1676 nm) by Partial Least Squares regression, yielding cross-validation coefficients (RCV2) above 0.97 for wood pulps, 0.95 for sisal pulp, and 0.91 for hemp pulp. Based on the residual prediction deviation, the model for each pulp was found to show good predictability. Nonetheless, the overall regression model, comprising the four different materials, was unreliable. In light of this, spectra were submitted to principal components analysis (PCA), hinting that pulps could be classified in terms of their hemicellulose to cellulose ratio. Considering all the statistical parameters, the overall proposal presented here begins with a PCA—Linear Discriminant Analysis model to classify the sample by its fiber type, subsequently selecting a specific regression model for that class. Overall, the presented models in this work allow the determination of the extent of oxidation of different cellulosic feedstocks, expressed as carboxyl content, in a fast and simple approach using a benchtop near-infrared equipment.
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SANTOS, GEANESSON ALBERTO DE OLIVEIRA;
Regina Maria Matos Jorge;
FARIAS, FABIANE OLIVEIRA;
Alvaro Luiz Mathias
Palavra-chave:
sustainable food production;
agricultural sustainability;
agrivoltaic system;
natural additives
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Ciência e Tecnologia de Alimentos; Ciências e Tecnologia de Alimentos;
Engenharias; Engenharia Química; Bioprocessos
resumo ...
Abstract Electrical energy generation through Photovoltaic Systems (PV) is a promising strategy...
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DE SOUZA TADANO, YARA;
BARBOSA, CYBELLI;
RIBEIRO, IGOR O.;
DE SOUZA, RODRIGO A.F.;
YAMAMOTO, CARLOS I.;
SANTOS, ERICKSON;
FERNANDESI, KARENN S.;
MACHADO, CRISTINE;
MARTIN, SCOT T.;
Ricardo Henrique Moreton Godoi;
Potgieter-Vermaak, Sanja;
SIQUEIRA, HUGO VALADARES;
HOELZEMANN, JUDITH J.;
DUARTE, EDICLÊ S.F.;
ALVES, THIAGO ANTONINI;
VALEBONA, FABIO;
LENZI, IURI;
Ana Flavia Locateli Godoi
Palavra-chave:
wildfire smoke;
health impacts;
blackcarbon
Áreas do conhecimento:
Engenharias; Engenharia Sanitária; Engenharia Ambiental
resumo ...
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SOUSA, ARON PINTO DE;
Regina Weinschutz;
MOTTA, ANTONIO CARLOS VARGAS;
Alvaro Luiz Mathias
Palavra-chave:
solid waste;
solid waste minimization;
agricultural sustainability;
sustainable food production;
brazilian agroindustry
Áreas do conhecimento:
Outros;
Engenharias; Engenharia Sanitária; Saneamento Básico; Residuos Sólidos, Domésticos e Industriais;
Engenharias; Engenharia Química; Processos Ambientais e Tecnologias Limpas
resumo ...
(en)
This study revealed that the yerba mate residue (YME) generated in producing Ilex paraguariensis tea extract is non-hazardous and non-inert. Reintroduced YME can make Mn, Fe and Zn available in yerba mate cultivation soil. A dose of YME (84.6, 56.4, 28.2, 14.1 t.ha-1 or not = control) was reintroduced into 5 recipient areas of the yerba mate forest in Paraná, Brazil to avoid unnecessary disposal from YME to landfill. The effect of reintroducing YME was evaluated in terms of soil change (potassium, phosphorus, sodium, calcium, magnesium, pH, and electrical conductivity) for two depths (0 to 10 cm or 10 to 20 cm), change in leaf composition, and growth of its branches for up to 210 days. YME agricultural recycling increased (p<0.05) the potassium content in both soil layers from the 90th day onwards and was beneficial for leaf productivity and branch growth. Additional studies must be carried out to determine the long-term effects. Even so, YME recycling is recommended to minimize the export of nutrients from the soil since there are no agronomic, sanitary, and safety restrictions, offering an innovative and environmentally sustainable solution for this industrial waste of yerba mate extract. Additionally, recycling minimizes unnecessary expenses with soil improver for small yerba mate producers. It extends the useful life of the landfill, which is also advantageous for the community surrounding the company.
(es)
Residuos de yerba mate (YME) generados en la producción de extracto de té de yerba mate de Ilex paraguariensis St.-Hil. Contiene nutrientes que pueden mejorar la calidad del suelo. Este estudio tuvo como objetivo evaluar el impacto del reciclaje agrícola en las propiedades del suelo y las plantas durante hasta 210 días. Se aplicaron dosis de YME de hasta 84,6 ton.ha-1 de manera superficial durante el mes de cosecha de una planta forrajera ubicada en Paraná, Brasil. Se evaluaron parámetros del suelo como potasio, fósforo, sodio, calcio, magnesio, pH y conductividad eléctrica a dos profundidades (0 a 10 cm y 10 a 20 cm), junto con la composición foliar, la producción y el crecimiento de las ramas. Las consideraciones agronómicas, sanitarias y de seguridad no indicaron restricciones al reciclaje. El reciclaje aumentó significativamente (p<0,05) el contenido de potasio en ambas capas del suelo a partir del día 90, aunque no se observaron efectos adicionales en otros parámetros del suelo hasta el día 210. El reciclaje tuvo un impacto positivo en el crecimiento de las ramas y la productividad de las hojas. Por lo que se recomienda el reciclaje para minimizar la exportación de nutrientes del suelo, ofreciendo una solución innovadora y ambientalmente sustentable para la disposición de estos residuos industriales en la industria del té de yerba mate.
(pt)
This study revealed that the yerba mate residue (YME) generated in producing Ilex paraguariensis tea extract is non-hazardous and non-inert. Reintroduced YME can make Mn, Fe and Zn available in yerba mate cultivation soil. A dose of YME (84.6, 56.4, 28.2, 14.1 t.ha-1 or not = control) was reintroduced into 5 recipient areas of the yerba mate forest in Paraná, Brazil to avoid unnecessary disposal from YME to landfill. The effect of reintroducing YME was evaluated in terms of soil change (potassium, phosphorus, sodium, calcium, magnesium, pH, and electrical conductivity) for two depths (0 to 10 cm or 10 to 20 cm), change in leaf composition, and growth of its branches for up to 210 days. YME agricultural recycling increased (p<0.05) the potassium content in both soil layers from the 90th day onwards and was beneficial for leaf productivity and branch growth. Additional studies must be carried out to determine the long-term effects. Even so, YME recycling is recommended to minimize the export of nutrients from the soil since there are no agronomic, sanitary, and safety restrictions, offering an innovative and environmentally sustainable solution for this industrial waste of yerba mate extract. Additionally, recycling minimizes unnecessary expenses with soil improver for small yerba mate producers. It extends the useful life of the landfill, which is also advantageous for the community surrounding the company.
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ABBAS, MUHAMMAD SUBTAIN;
YANG, YAJUAN;
ZHANG, QUANXI;
GUO, DONGGANG;
Ana Flavia Locateli Godoi;
Ricardo Henrique Moreton Godoi;
GENG, HONG
Palavra-chave:
salt lake aerosol;
climate change;
chemical composition;
health impacts
resumo ...
Salt Lakes, having a salt concentration higher than that of seawater and hosting unique extremophiles, are predominantly located in drought-prone zones worldwide, accumulating diverse salts and continuously emitting salt dust or aerosols. However, knowledge on emission, chemical composition, and health impacts of Salt Lake aerosols under climate change is scarce. This review delves into the intricate dynamics of Salt Lake aerosols in the context of climate change, pointing out that, as global warming develops and weather patterns shift, Salt Lakes undergo notable changes in water levels, salinity, and overall hydrological balance, leading to a significant alteration of Salt Lake aerosols in generation and emission patterns, physicochemical characteristics, and transportation. Linked to rising temperatures and intensified evaporation, a marked increase will occur in aerosol emissions from breaking waves on the Salt Lake surface and in saline dust emission from dry lakebeds. The hygroscopic nature of these aerosols, coupled with the emission of sulfate aerosols, will impart light-scattering properties and a cooling effect. The rising temperature and wind speed; increase in extreme weather in regard to the number of events; and blooms of aquatic microorganisms, phytoplankton, and artemia salina in and around Salt Lakes, will lead to the release of more organic substances or biogenic compounds, which contribute to the alteration of saline aerosols in regard to their quantitative and chemical composition. Although the inhalation of saline aerosols from Salt Lakes and fine salt particles suspended in the air due to salt dust storms raises potential health concerns, particularly causing respiratory and cardiovascular disease and leading to eye and skin discomfort, rock salt aerosol therapy is proved to be a good treatment and rehabilitation method for the prevention and treatment of pneumoconiosis and chronic obstructive pulmonary disease (COPD). It is implied that the Salt Lake aerosols, at a certain exposure concentration, likely can delay the pathogenesis of silicosis by regulating oxidative stress and reducing interstitial fibrosis of the lungs. It emphasizes the interconnectedness of climate changes, chemical composition, and health aspects, advocating for a comprehensive and practical approach to address the challenges faced by Salt Lake aerosols in an ever-changing global climate.
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DA COSTA, GABRIELA;
PAULIQUEVIS, THEOTONIO;
HEISE, EDUARDO FERREIRA JOSÉ;
Potgieter-Vermaak, Sanja;
Ana Flavia Locateli Godoi;
YAMAMOTO, CARLOS ITSUO;
DOS SANTOS-SILVA, JÉSSICA CAROLINE;
Ricardo Henrique Moreton Godoi
Palavra-chave:
COVID 19;
particulate matter;
low cost sensors;
Air pollution;
spatialization
Áreas do conhecimento:
Engenharias; Engenharia Sanitária; Engenharia Ambiental
resumo ...
Brazil has experienced one of the highest COVID-19 fatality rates globally. While numerous studies have explored the potential connection between air pollution, specifically fine particulate matter (PM2.5), and the exacerbation of SARS-CoV-2 infection, the majority of this research has been conducted in foreign regions—Europe, the United States, and China—correlating generalized pollution levels with health-related scopes. In this study, our objective is to investigate the localized connection between exposure to air pollution exposure and its health implications within a specific Brazilian municipality, focusing on COVID-19 susceptibility. Our investigation involves assessing pollution levels through spatial interpolation of in situ PM2.5 measurements. A network of affordable sensors collected data across 9 regions in Curitiba, as well as its metropolitan counterpart, Araucaria. Our findings distinctly reveal a significant positive correlation (with r-values reaching up to 0.36, p-value < 0.01) between regions characterized by higher levels of pollution, particularly during the winter months (with r-values peaking at 0.40, p-value < 0.05), with both COVID-19 mortality and incidence rates. This correlation gains added significance due to the intricate interplay between urban atmospheric pollution and regional human development indices. Notably, heightened pollution aligns with industrial hubs and intensified vehicular activity. The spatial analysis performed in this study assumes a pivotal role by identifying priority regions that require targeted action post-COVID. By comprehending the localized dynamics between air pollution and its health repercussions, tailored strategies can be implemented to alleviate these effects and ensure the well-being of the public.
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MACÁRIO CUSTÓDIO, ISABELA;
Aguinaldo dos Santos;
QUEIROZ FERREIRA BARATA, TOMÁS
Palavra-chave:
housing first
Áreas do conhecimento:
Engenharias; Construção Civil; Habitação de Interesse Social
resumo ...
(en)
This article explores the social aspect of Sustainable Design and investigates the potential of implementing the Housing First (HF) philosophy as public policy. The HF philosophy is a form of Design for the Base of the Pyramid (BoP) that aims to include homeless people in the community, promoting equity and social cohesion. This research paper's theoretical foundation describes BoP Design concepts and relates them to the HF service through a bibliographic review of authors who discuss these definitions. The article also provides context to the subject in Brazil and analyzes the Moradia Cidadã program, which utilizes the Housing First concept. Additionally, the article explores the Low Income Housing Institute (LIHI), located in Seattle, and more specifically, its Tiny House Villages program. After discussing the organizational and project guidelines proposed by these programs, the information collected is compared and associated with the social context of Brazil.
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Considerando la dimensión social del Diseño Sostenible, este artículo tiene como objetivo verificar las posibilidades de implementar la filosofía Housing First (HF) como política pública, ya que se caracteriza como una forma de Diseño para la Base de la Pirámide (BoP) que favorece la inclusión. de la población sin hogar en la comunidad, brindando equidad y cohesión social. La fundamentación teórica describe los conceptos del Diseño BoP relacionándolo con el servicio de HF a través de una revisión bibliográfica de autores que abordan estas definiciones. A continuación, se contextualiza el tema en Brasil, así como se analiza el programa Moradia Cidadã, que utiliza el concepto de Vivienda Primero. También se hace un análisis de la organización denominada Low Income Housing Institute (LIHI), ubicada en Seattle, más específicamente el programa Tiny House Villages. Después de discutir las directrices organizativas y de proyecto propuestas por ellos, las informaciones recopiladas se comparan y asocian con el contexto social de Brasil.
(pt)
Considerando a dimensão social do Design Sustentável, este artigo tem como objetivo verificar as possibilidades de implementação da filosofia Housing First (HF) como política pública, visto que se caracteriza como uma forma de atuação do Design para a Base da Pirâmide (BoP) que favorece a inclusão da população em situação de rua na comunidade, proporcionando equidade e coesão social. A fundamentação teórica descreve os conceitos do Design BoP relacionando-o com o serviço de HF por meio de revisão bibliográfica de autores que tratam destas definições. Em seguida, é realizada a contextualização do assunto no Brasil, bem como análise do programa Moradia Cidadã, que utiliza o conceito de Moradia Primeiro. Também é feita análise da organização denominada Low Income Housing Institute (LIHI), localizado em Seattle, mais especificamente o programa Tiny House Villages. Após discussão sobre as diretrizes organizacionais e projetuais propostas por eles, as informações coletadas são comparadas e associadas ao contexto social do Brasil.
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LUZ, ALINE R.;
de Lima, Gabriel Goetten;
KASIOROWSKI, TUANY;
G. B. de Souza;
Carlos Maurício Lepienski;
GRANDINI, CARLOS R.;
KUROMOTO, NEIDE K.;
ALVES, ANA PAULA R.
Palavra-chave:
biomateriais;
TITÂNIO
Áreas do conhecimento:
Engenharias; Engenharia de Materiais e Metalúrgica; BIOMATERIAIS
resumo ...
Abstract. In this study, we evaluated the tribocorrosion and mechanical properties of nanotubes grown on a Ti–35Nb alloy. The nanotube arrays, approximately 2.0 µm thick, were formed through controlled anodization and annealing, composed of Ti and Nb oxides. The compact oxide film at the nanotube/substrate interface provided corrosion resistance, lubricating properties in worn tracks, and improved wear resistance. The nanotubes exhibited a lower coefficient of friction, hardness, and elastic modulus compared to untreated Ti–35Nb. The crystalline structure of the nanotubes and the oxide interface layer enhanced adhesion, preventing plastic deformation and improving tribocorrosion resistance.
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