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 | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Universidade Federal de São Carlos (UFSCar) | - |
Autor(es): dc.creator | da Silva, Vinicius Luiz [UNESP] | - |
Autor(es): dc.creator | Dilarri, Guilherme [UNESP] | - |
Autor(es): dc.creator | Mendes, Carolina Rosai [UNESP] | - |
Autor(es): dc.creator | Lovaglio, Roberta Barros | - |
Autor(es): dc.creator | Gonçalves, Adilson Roberto [UNESP] | - |
Autor(es): dc.creator | Montagnolli, Renato Nallin | - |
Autor(es): dc.creator | Contiero, Jonas [UNESP] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:52:35Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:52:35Z | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2020-12-31 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.1016/j.molliq.2020.114753 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/208165 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/208165 | - |
Descrição: dc.description | Rhamnolipids are a class of glycolipid biosurfactants with several applications, including the bioremediation of pollutant substances. However, little is known about its application in the treatment of textile effluents. Therefore, this work aims to apply a rhamnolipid-type biosurfactant to improve the sorption of the Direct Orange 2GL textile dye. The adsorption isotherms, kinetics, and thermodynamics were investigated from a novel approach. The adsorbate/adsorbent ratio was also characterized by FT-IR spectroscopy. Bioassays using Daphnia similis verified changes in toxicity after the dye underwent the proposed treatment. The adsorption dataset was better adjusted to the Langmuir model, which indicated a strong chemical interaction coming from a finite number of binding sites. The adsorption was only possible at acidic pH. Kinetic studies further demonstrated that the adsorption equilibrium is achieved in 60 min when 1.181 μg mg−1 of dye was adsorbed by the adsorbent. Thermodynamics showed that the adsorption process was proportionally influenced by higher temperatures. The thermodynamics studies also showed a spontaneous and endothermic sorption process. The FT-IR spectroscopy identified the adsorbate/adsorbent binding sites, proving that the bond between the dye and rhamnolipid occurred through the hydrogen bonds. The recovery of both dye and rhamnolipid after the adsorption was also efficient, as more than 50% of the adsorbed dye was recovered. The post-treatment bioassays using D. similis found a significant decrease in toxicity, yielding less than 30% mortality rate after adsorption. It is concluded that the rhamnolipid was an effective adsorbent and it is a viable component to treat effluents containing textile dyes. | - |
Descrição: dc.description | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | - |
Descrição: dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | - |
Descrição: dc.description | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | - |
Descrição: dc.description | Department of General and Applied Biology Sao Paulo State University (UNESP), 24-A Avenue, 1515 | - |
Descrição: dc.description | Natural Sciences Center Federal University of Sao Carlos (UFSCar), SP-189, km 12 | - |
Descrição: dc.description | Institute for Research in Bioenergy Sao Paulo State University (UNESP), 24-A Avenue, 1515 | - |
Descrição: dc.description | Department of Natural Sciences Mathematics and Education Agricultural Sciences Centre Federal University of Sao Carlos (UFSCar), SP-330, km 174 | - |
Descrição: dc.description | Department of General and Applied Biology Sao Paulo State University (UNESP), 24-A Avenue, 1515 | - |
Descrição: dc.description | Institute for Research in Bioenergy Sao Paulo State University (UNESP), 24-A Avenue, 1515 | - |
Descrição: dc.description | CNPq: 130621/2016-1 | - |
Descrição: dc.description | FAPESP: 2015/1444-2 | - |
Descrição: dc.description | CNPq: 302935/2015-0 | - |
Descrição: dc.description | CAPES: 88881.132117/2016-01 | - |
Idioma: dc.language | en | - |
Relação: dc.relation | Journal of Molecular Liquids | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Bioassay | - |
Palavras-chave: dc.subject | Biosurfactant | - |
Palavras-chave: dc.subject | Daphnia similis | - |
Palavras-chave: dc.subject | Isotherms | - |
Palavras-chave: dc.subject | Toxicity | - |
Título: dc.title | Rhamnolipid from Pseudomonas aeruginosa can improve the removal of Direct Orange 2GL in textile dye industry effluents | - |
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: