Atenção: Todas as denúncias são sigilosas e sua identidade será preservada.
Os campos nome e e-mail são de preenchimento opcional
Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Federal University of Triângulo Mineiro - UFTM | - |
Autor(es): dc.contributor | Universidade Federal de Uberlândia (UFU) | - |
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Universidade Estadual de Londrina (UEL) | - |
Autor(es): dc.creator | da Silva, Camila Cristina | - |
Autor(es): dc.creator | de Faria Lima, Alexandre | - |
Autor(es): dc.creator | Moreto, Jéferson Aparecido | - |
Autor(es): dc.creator | Dantas, Sandra | - |
Autor(es): dc.creator | Alves Henrique, Mariana | - |
Autor(es): dc.creator | Pasquini, Daniel | - |
Autor(es): dc.creator | Cipriano Rangel, Elidiane [UNESP] | - |
Autor(es): dc.creator | Scarmínio, Jair | - |
Autor(es): dc.creator | Gelamo, Rogério Valentim | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:34:18Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:34:18Z | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-06-01 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.1016/j.mtcomm.2020.101140 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/201712 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/201712 | - |
Descrição: dc.description | The sisal fiber (agave sisalana) is a natural material that presents interesting physical and chemical properties, such as, good adsorption capacity, biodegradability and possibility to be used in composites. Improving these properties is of great importance since sisal fiber may be used in various technological applications. The aim of this work was to study the influence of surface treatment on sisal fibers properties and its effect over methylene blue (MB) adsorption using kinetics models and isotherms studies. The treatment herein used was reactive microwave-assisted cold plasma using mixtures of Ar and CO2, which appears as an alternative to traditional chemical treatments. The adsorption kinetics studies were conducted in order to elucidate the behavior between adsorbent and adsorbate. For this purpose, two isotherm models were used, (i) Redlich-Peterson and (ii) Langmuir. The results show that the plasma treatment promoted an increase in fiber surface roughness, a slight and insignificant decrease in the fiber crystallinity index as well as the breaking and removal of hydroxyl groups with consequent modification of the lignocellulosic material's original structure. The surface modification of sisal fibers by using cold plasma method promoted greater removal of the MB molecules reaching a 96 %. Kinetic and isotherm studies indicated that the adsorption mechanisms were favorable for both fibers and probably occurred in heterogeneous sites for both pristine and plasma-treated fibers. It was observed that the plasma treatment did not cause the loss of the original properties of the fibers and plays a fundamental role in increasing the adsorption, being indicated for wastewater pollutant removal processes at a low production cost as an alternative to the chemical process currently used. | - |
Descrição: dc.description | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | - |
Descrição: dc.description | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | - |
Descrição: dc.description | Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) | - |
Descrição: dc.description | Institute of Technological and Exact Sciences Federal University of Triângulo Mineiro - UFTM | - |
Descrição: dc.description | Institute of Exact Sciences Naturals and Education Federal University of Triângulo Mineiro - UFTM | - |
Descrição: dc.description | Chemistry Institute Federal University of Uberlândia - UFU | - |
Descrição: dc.description | Laboratory of Technological Plasmas Sorocaba Institute of Science and Technology Paulista State University – UNESP | - |
Descrição: dc.description | State University of Londrina - UEL Physics Department | - |
Descrição: dc.description | Laboratory of Technological Plasmas Sorocaba Institute of Science and Technology Paulista State University – UNESP | - |
Idioma: dc.language | en | - |
Relação: dc.relation | Materials Today Communications | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Adsorption | - |
Palavras-chave: dc.subject | Agave sisalana | - |
Palavras-chave: dc.subject | Dye removal | - |
Palavras-chave: dc.subject | Natural fiber | - |
Palavras-chave: dc.subject | Reactive cold plasma | - |
Título: dc.title | Influence of plasma treatment on the physical and chemical properties of sisal fibers and environmental application in adsorption of methylene blue | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
O Portal eduCAPES é oferecido ao usuário, condicionado à aceitação dos termos, condições e avisos contidos aqui e sem modificações. A CAPES poderá modificar o conteúdo ou formato deste site ou acabar com a sua operação ou suas ferramentas a seu critério único e sem aviso prévio. Ao acessar este portal, você, usuário pessoa física ou jurídica, se declara compreender e aceitar as condições aqui estabelecidas, da seguinte forma: