22 documents found, page 1 of 3
Investigating the Binding Heterogeneity of Trace Metal Cations With SiO2 Nanopa...
Rotureau, Elise; Rocha, Luciana S.; Goveia, Danielle [UNESP]; Alves, Nuno G.; Pinheiro, José PauloMade available in DSpace on 2021-06-25T10:48:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-16; Agence Nationale de la Recherche; Institut national des sciences de l'Univers; Fundação para a Ciência e a Tecnologia; Silica oxides nano- and microparticles, as well as silica-based materials, are very abundant in nature and industrial processes. Trace metal cation binding with these bulk materials is ...
Water softening using graphene oxide/biopolymer hybrid nanomaterials
Rocha, Luciana S.; Nogueira, João; Daniel-da-Silva, Ana Luísa; Marques, Paula; Fateixa, Sara; Pereira, Eduarda; Trindade, TitoThere is a growing interest in developing more environmentally friendly softeners for hardness reduction of water supplied for domestic consumption. This work focuses on exploring biopolymer-based softeners, through the surface modification of graphene oxide (GO) with the anionic biopolymer κ-carrageenan (GO-Si(κ)CRG). The performance of the modified GO to decrease the hardness of natural waters containing high...
Producing magnetic nanocomposites from paper sludge for the adsorptive removal ...
Rocha, Luciana S.; Sousa, Érika M. L.; Gil, María V.; Oliveira, João A. B. P.; Otero, Marta; Esteves, Valdemar I.; Calisto, VâniaIn view of a simple after-use separation, the potentiality of producing magnetic activated carbon (MAC) by intercalation of ferromagnetic metal oxide nanoparticles in the framework of a powder activated carbon (PAC) produced from primary paper sludge was explored in this work. The synthesis conditions to produce cost effective and efficient MACs for the adsorptive removal of pharmaceuticals (amoxicillin, carbam...
Sustainable and recoverable waste-based magnetic nanocomposites used for the re...
Rocha, Luciana S.; Sousa, Érika M.L.; Pereira, Diogo; Gil, María V.; Otero-Irurueta, Gonzalo; Hortigüela Gallo, María J.; Otero, MartaThis work aimed at producing easily recoverable magnetic iron-oxide functionalized activated carbons (AC) through environmentally and energetically sustainable methods, evaluating their efficacy towards the removal of the pharmaceuticals diclofenac (DCF) and venlafaxine (VEN) from different aqueous matrices (ultrapure water and wastewater treatment plant effluents). Two AC were prepared by chemical activation o...
Recent advances on the development and application of magnetic activated carbon...
Rocha, Luciana S.; Pereira, Diogo; Sousa, Érika; Otero, Marta; Esteves, Valdemar I.; Calisto, VâniaThe adsorption of pharmaceutical substances using carbonaceous materials, such as activated carbon (AC), biochar (BC) and hydrochar (HC), has received substantial attention by researchers working on water treatment, due to the simplicity, low-cost and high performance of this process. In order to widen the potentiality of these carbonaceous materials and to overcome some of their limitations, particularly the i...
In situ functionalization of a cellulosic-based activated carbon with magnetic ...
Pereira, Diogo; Rocha, Luciana S.; Gil, María V.; Otero, Marta; Silva, Nuno J. O.; Esteves, Valdemar I.; Calisto, VâniaThe main goal of this work was to produce an easily recoverable waste-based magnetic activated carbon (MAC) for an efficient removal of the antiepileptic pharmaceutical carbamazepine (CBZ) from wastewater. For this purpose, the synthesis procedure was optimized and a material (MAC4) providing immediate recuperation from solution, remarkable adsorptive performance and relevant properties (specific surface area o...
Toxicological characterization of supported ionic liquids for the removal of no...
Valente, João Vasco; Barros, Rafael; Coelho, Susana; Cristovão, Ana Clara; Pastorinho, M. Ramiro; Rocha, Luciana S.; Neves, Márcia C.; Freire, Mara G.Non-steroidal anti-inflammatory drugs (NSAIDs) are a class of widely used pharmaceuticals that has been detected in the aquatic environment. Due to their deleterious environmental and health concerns associated with “boomerang” effect, several technologies have been proposed to prevent their release into the environment. In this work, new ionic liquid-based materials were used to remove NSAIDs from aqueous solu...
Investigating the binding heterogeneity of trace metal cations with SiO2 nanopa...
Rotureau, Elise; Rocha, Luciana S.; Goveia, Danielle; Alves, Nuno G.; Pinheiro, José PauloSilica oxides nano- and microparticles, as well as silica-based materials, are very abundant in nature and industrial processes. Trace metal cation binding with these bulk materials is generally not considered significant in speciation studies in environmental systems. Nonetheless, this might change for nanoparticulate systems as observed in a previous study of Pb(II) with a very small SiO2 particle (7.5 nm dia...
Bioaccumulation of Hg, Cd and Pb by Fucus vesiculosus in single and multi-metal...
Henriques, Bruno; Lopes, Cláudia Batista; Figueira, Paula; Rocha, Luciana S.; Duarte, Armando C.; Vale, Carlos; Pardal, Miguel A.; Pereira, EduardaResults of 7-days exposure to metals, using environmentally realistic conditions, evidenced the high potential of living Fucus vesiculosus to remove Pb, Hg and Cd from contaminated salt waters. For different contamination scenarios (single- and multi-contamination), ca 450 mg L-1 (dry weight), enable to reduce the concentrations of Pb in 65%, of Hg in 95% and of Cd between 25 and 76%. Overall, bioconcentration ...
Isolation and purification treatments change the metal-binding properties of hu...
Botero, Wander G.; Pineau, Michael; Janot, Noemie; Domingos, Rute F.; Mariano, José; Rocha, Luciana S.; Groenenberg, Jan E.; Benedetti, Marc F.Environmental contextStudying the mechanism of binding between metals and natural organic matter is fundamental to understanding the transport and availability of these contaminants in the environment. The influence of sample treatment on the purification of organic matter showed significant differences in the interaction with metals. The results will contribute to improved modelling of metal binding to organic...