15 documents found, page 1 of 2
Monitoring azole antifungals in water: a step toward environmental and human he...
Barbosa, Marta O.; Madeira, Luís D.; L. Ribeiro, Ana R.; Silva, Adrián M. T.Background: Water is an essential resource for all living organisms and human activities. However, the presence of organic micropollutants (OMPs) at residual levels (ng/L‒μg/L) in aquatic environments raises significant concerns. Among these, Priority Substances (PSs, Directive 2013/39) and Contaminants of Emerging Concern (CECs, Watch Lists of Decisions 2015/495, 2018/840, 2020/1161, 2022/1307, and 2025/439) h...
Growth of Carbon Nanotubes on Co(x)‐Ni(1‐x) Ferrites by Chemical Vapor Depositi...
Silva, Adriano S.; Roman, Fernanda; Díaz de Tuesta, Jose Luis; Olias, Lola G.; Çaha, Ihsan; Ferreira, Ana P.; Souza, Renata P. deUpcycling plastic solid wastes (PSWs) into high-value carbon nanotubes (CNTs) offers a promising approach to sustainable material development. This study explores the synthesis of CNTs via chemical vapor deposition (CVD) using mixed cobalt-nickel-iron oxide catalysts supported on alumina and PSW representative polyolefins as carbon sources. The impact of catalyst composition on the yield, morphology, and textur...
Performance of polycarbonate, cellulose nitrate and polyethersulfone filtering ...
Abreu-Silva, Joana; Ribeirinho-Soares, Sara; Oliveira-Inocêncio, Inês; Pedrosa, Marta; Silva, Adrián M. T.; Nunes, Olga C.; Manaia, Célia M.Demineralized and disinfected waters may have very low microbial loads, requiring that large volumes of water are filtered to recover enough biomass for further analysis. Extended filtration periods, often interrupted by clogging, are a major limiting factor to concentrate samples' microbiota for further examination, besides hindering the work pace. In this study, we investigated the performance of three types ...
Capacitated waste collection problem solution using an open-source tool
Silva, Adriano Santos; Alves, Filipe; Diaz de Tuesta, José Luis; Rocha, Ana Maria A. C.; Pereira, Ana I.; Silva, Adrián M. T.; Gomes, Helder T.Population in cities is growing worldwide, which puts the systems that offer basic services to citizens under pressure. Among these systems, the Municipal Solid Waste Management System (MSWMS) is also affected. Waste collection and transportation is the first task in an MSWMS, carried out traditionally in most cases. This approach leads to inefficient resource and time expense since routes are prescheduled or d...
Multi-target analysis of cytostatics in hospital effluents over a 9-month period
Gouveia, Teresa I. A.; Silva, Adrián M. T.; Freire, Mara G.; Sousa, Ana C. A.; Alves, Arminda; Santos, Mónica S. F.The consumption of cytostatics, pharmaceuticals prescribed in chemotherapy, is increasing every year and worldwide, along with the incidence of cancer. The presence and the temporal evolution of cytostatics in wastewaters from a Portuguese hospital center was evaluated through a 9-month sampling campaign, comprising a total of one hundred and twenty-nine samples, collected from May 2019 to February 2020. Eleven...
A pilot study combining ultrafiltration with ozonation for the treatment of sec...
Graça, Cátia A. L.; Ribeirinho-Soares, Sara; Abreu-Silva, Joana; Ramos, Inês I.; Ribeiro, Ana R.; Castro-Silva, Sérgio M.; Segundo, Marcela A.Ozonation followed by ultrafiltration (O3 + UF) was employed at pilot scale for the treatment of secondary urban wastewater, envisaging its safe reuse for crop irrigation. Chemical contaminants of emerging concern (CECs) and priority substances (PSs), microbial load, estrogenic activity, cell viability and cellular metabolic activity were measured before and immediately after O3 + UF treatment. The microbial lo...
Immobilised cerium-doped Zinc oxide as a photocatalyst for the degradation of a...
Zammit, Ian; Vaiano, Vincenzo; Ribeiro, Ana R.; Silva, Adrián M. T.; Manaia, Célia M.; Rizzo, LuigiThe threat of antibiotic resistance to the wellbeing of societies is well established. Urban wastewater treatment plants (UWTPs) are recognised sources for antibiotic resistance dissemination in the environment. Herein a novel cerium-doped zinc oxide (Ce-ZnO) photocatalyst is compared to ZnO and the benchmark TiO2-P25 in the immobilised form on a metallic support, to evaluate a photocatalytic process as a possi...
Removal of microorganisms and antibiotic resistance genes from treated urban wa...
Grehs, Bárbara W. N.; Lopes, Ana Rita; Moreira, Nuno F. F.; Fernandes, Telma; Linton, Maria A. O.; Silva, Adrián M. T.; Manaia, Célia M.The presence of antibiotic resistant-bacteria (ARB) and antibiotic resistance genes (ARG) in treated effluents of urban wastewater treatment plants (WWTP) may represent a threat to the environment and public health. Therefore, cost-effective technologies contributing to minimize loads of these contaminants in the final effluents of WWTP are required. This study aimed at assessing the capacity of coagulation to ...
A tailor-made protocol to synthesize yolk-shell graphene-based magnetic nanopar...
Rodrigues, Raquel O.; Baldi, Giovanni; Doumett, Saer; Gallo, Juan; Bañobre-López, Manuel; Dražić, Goran; Calhelha, Ricardo C.; Ferreira, Isabel C. F. R.A simple tailor-made protocol to synthesize graphene-based magnetic nanoparticles (GbMNPs) for nanomedicine is herein reported. Different GbMNPs with very distinctive physicochemical and toxicological properties were synthesized by adjusting the number of carbon precursors in the coating of superparamagnetic iron oxide nanoparticles. In vitro tests show the ability to use these GbMNPs as intelligent and on-dema...
Multifunctional graphene-based magnetic nanocarriers for combined hyperthermia ...
Rodrigues, Raquel O.; Baldi, Giovanni; Doumett, Saer; Garcia-Hevia, Lorena; Gallo, Juan; Bañobre-López, Manuel; Dražić, Goran; Calhelha, Ricardo C.The synthesis of hydrophilic graphene-based yolk-shell magnetic nanoparticles functionalized with copolymer pluronic F-127 (GYSMNP@PF127) is herein reported to achieve an efficient multifunctional biomedical system for mild hyperthermia and stimuli-responsive drug delivery. In vitro tests revealed the extraordinary ability of GYSMNP@PF127 to act as smart stimuli-responsive multifunctional nanomedicine platform ...