Výsledky vyhledávání - "Cínthia S. Castro"

Akademický článek

Remoção de compostos orgânicos em água empregando carvão ativado impregnado com óxido de ferro: ação combinada de adsorção e oxidação em presença de H2O2 Removal of organic compounds from water by activated carbon impregnated with iron oxide: combined action of adsorption and oxidation in the presence of H2O2

Autor: Cínthia S. Castro, Mário C. Guerreiro, Luiz C. A. Oliveira, Maraísa Gonçalves

Publikováno v: Química Nova, Vol 32, Iss 6, Pp 1561-1565 (2009)

In this work, composites based on activated carbon/iron oxide (AC/Fe) were prepared in two different proportions (AC/Fe 5/1 and 1/1) and evaluated in the removal of the organic dye methylene blue (MB). Physical-chemical properties of the composites w

Externí odkaz: https://doaj.org/article/569c0144c0c5466ea127c0a7a14d6c01

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The enhanced activity of base metal modified MgAl mixed oxides from sol-gel hydrotalcite for ethylic transesterification

Autor: Amanda S. Damasceno, Renata A.B. Lima-Corrêa, Cínthia S. Castro, José Mansur Assaf

Publikováno v: Renewable Energy. 146:1984-1990

MgAl hydrotalcite was successfully prepared through the sol-gel method and modified by in situ addition of base metals (Me = K, Ba, Sr and La). The Me–MgAl hydrotalcites were calcined and the obtained oxides were evaluated as catalysts for ethylic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a31030754b0bfac6c861d20c429e116a
https://doi.org/10.1016/j.renene.2019.08.047

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Metal-free bifunctional silica for conversion of waste glycerol from biodiesel: Sustainable production of formic acid

Autor: Poliane Chagas, Luiz C.A. Oliveira, Cínthia S. Castro, Marcio De Figueiredo Portilho, Gabriela Santos Caldeira, Mariana A. Thibau, Patterson P. de Souza, Samuel Moura Breder

Publikováno v: Chemical Engineering Journal. 369:1102-1108

This work describes for the first time the conversion of the waste glycerol from biodiesel production using a metal-free bifunctional silica with high porosity as catalyst. The mesoporous silica (synthetic SiO2) with high specific surface area of 148

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::892336d125e218b99a0f4e57fcbd706f
https://doi.org/10.1016/j.cej.2019.03.068

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Iron ore tailings as catalysts for oxidation of the drug paracetamol and dyes by heterogeneous Fenton

Autor: Poliane Chagas, Cínthia S. Castro, Tatiana Cristina de Oliveira Mac Leod, Luiz C.A. Oliveira, Thiago de Melo Augusto, Daniel Lara Sangiorge

Publikováno v: Journal of Environmental Chemical Engineering. 6:6545-6553

An iron mining residue was used as generated (R) or modified to produce heterogeneous catalysts for the Fenton reaction. The residue (R) was thermally treated at 600 °C under reducing atmosphere of CH4 (R-CH4) or impregnated with polyethylene tereph

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::affb60bddcc5f31234a1ad47fe58d991
https://doi.org/10.1016/j.jece.2018.09.052

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Carbon/FexOy magnetic composites obtained from PET and red mud residues: paracetamol and dye oxidation

Autor: Leonardo S. Sousa, Poliane Chagas, Cínthia S. Castro, Luiz C.A. Oliveira

Publikováno v: Environmental Technology. 40:2840-2852

Composite materials from PET and red mud (RM) wastes were used as catalysts for environmental application such as the wastewater treatment. The PET-RM catalysts were obtained by a mechanical mixtur...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ccabbc58599b63414074d7f405f32d3
https://doi.org/10.1080/09593330.2018.1457723

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Mesoporous activated carbon from polyethyleneterephthalate (PET) waste: pollutant adsorption in aqueous solution

Autor: Cínthia S. Castro, Maraisa Gonçalves, Júlia Teixeira Andrade, Luísa Nagyidai Viau, Thais Aline Prado Mendonça

Publikováno v: New Journal of Chemistry. 42:14612-14619

Mesoporous activated carbons (ACs) of high surface area were prepared from low cost and highly available powdered PET waste (generated during PET bottle recycling). Different chemical activating agents were employed. ZnCl2 produced an AC of 700 m2 g�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::277a343915b6b7ed5ad3e1f49a40cccd
https://doi.org/10.1039/c8nj02715c

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Composites based on PET and red mud residues as catalyst for organic removal from water

Autor: Cínthia S. Castro, Talita E. Souza, Natálya I. Bento, Luiz C.A. Oliveira, Patricia Silva Santos

Publikováno v: Journal of Hazardous Materials. 314:304-311

In this study, we obtained a composite based on carbon/iron oxide from red mud and PET (poly(ethylene terephthalate)) wastes by mechanical mixture (10, 15 and 20wt.% of PET powder/red mud) followed by a controlled thermal treatment at 400°C under ai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a2a1d6e5d59647665c98e0228b4cd5a
https://doi.org/10.1016/j.jhazmat.2016.04.066

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Photocatalytic performance of cementitious materials with addition of red mud and Nb2O5 particles

Autor: Luiz C.A. Oliveira, Augusto Cesar da Silva Bezerra, Michelle A.N.S. Moreira, Cínthia S. Castro, Patterson P. de Souza, Patrícia Santiago de Oliveira Patrício, Ana Pacheli Heitmann

Publikováno v: Construction and Building Materials. 259:119851

In this work, Nb2O5 and red mud (RM) were separately added to Portland cement for application as photocatalysts using visible (vis) and ultraviolet (UV) light. The resultant materials, i.e., mortar/RM and mortar/Nb2O5, were characterized by UV–vis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::052cbc2c1fe1cbf7a83e571c993b88ce
https://doi.org/10.1016/j.conbuildmat.2020.119851

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Lithium containing MgAl mixed oxides obtained from sol-gel hydrotalcite for transesterification

Autor: Cínthia S. Castro, José Mansur Assaf, Renata A.B. Lima-Corrêa

Publikováno v: Brazilian Journal of Chemical Engineering, Volume: 35, Issue: 1, Pages: 189-198, Published: JAN 2018
Brazilian Journal of Chemical Engineering, Vol 35, Iss 1, Pp 189-198
Brazilian Journal of Chemical Engineering v.35 n.1 2018
Brazilian Journal of Chemical Engineering
Associação Brasileira de Engenharia Química (ABEQ)
instacron:ABEQ

The innumerous advantages of heterogeneous catalysts employed in biodiesel production have stimulated the search for a solid catalyst capable of replacing the industrially used homogeneous catalysts. This paper investigates the effect of the sol-gel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1371992cd12ed0c2cd993d8c636ccdbc
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322018000100189&lng=en&tlng=en

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Green acid catalyst obtained from industrial wastes for glycerol etherification

Autor: Wagner Carvalho, Maraisa Gonçalves, Luiz C.A. Oliveira, Cínthia S. Castro

Publikováno v: Fuel Processing Technology. 138:695-703

In this work several carbonaceous wastes (glycerin (G), waste coffee grounds (WC) and polyethylene terephthalate (PET)) were successfully used as precursors to obtain carbon-based catalysts to transform crude glycerol (from biodiesel production) into

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eccef5e96692447b80b5f03d0811fc51
https://doi.org/10.1016/j.fuproc.2015.07.010

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