Preparation and Characterization of Tubular Composite Membranes and their Application in Water Flow Measurements

Cunha, Rochélia Silva Souza; Mota, Joseane Damasceno; Mota, Mércia Melo de Almeida; Rodrigues, Meiry Gláucia Freire; Machado, Fabricio

doi:10.4028/www.scientific.net/msf.912.263

Cited by 3 publications

(2 citation statements)

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“…Our research group has published a series of studies on the preparation of membranes to treat various effluents [19][20][21][22][23][24][25][26][27]. This study is an integral part of this line of search.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of SAPO-34 Zeolite Membrane: Influence of Sources of Silica

Barbosa,

Rodrigues

2023

Catal Res

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The research described the production and characterization of various materials, particularly alpha-alumina ceramic supports, zeolite SAPO-34, and zeolite membranes. Ceramic supports were manufactured through dry uniaxial compaction. Sintering of the supports was carried out at 1300°C for 2 h. SAPO-34 zeolites and zeolite membranes were synthesized through a hydrothermal process involving two steps: a first step at 38°C for 24 h and a second step at 200°C for 24 h. The research aimed to determine how different silica sources, namely Aerosil 380, colloidal silica, and TEOS, influenced the outcome of the synthesis. The study identified that Aerosil 380 silica was the most suitable source for synthesizing SAPO-34 zeolites and membranes. Zeolite membranes (SAPO-34/alpha-alumina) displayed a uniform and homogeneous distribution of SAPO-34 phase zeolitic crystals. The absence of defects or cracks in these membranes confirmed the successful formation of the SAPO-34 zeolite membrane structure. This research has significant implications, particularly in materials science and applications utilizing zeolites and membranes. The choice of silica source plays a crucial role in determining the quality and properties of the synthesized materials, and the detailed characterization provides valuable insights into their performance in practical applications. Overall, the research contributes to the understanding and optimization of zeolite synthesis processes.

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Section: Introductionmentioning

confidence: 99%

Synthesis of SAPO-34 Zeolite Membrane: Influence of Sources of Silica

Barbosa,

Rodrigues

2023

Catal Res

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“…Deve-se ressaltar, que a fórmula estrutural dos argilominerais é reportada em relação a metade da célula unitária, ou seja, em relação a 3 sítios octaédricos (Souza-Santos, 1989;Bergaya et al, 2006). Nosso grupo de pesquisa (Laboratório de Desenvolvimento de Novos Materiais -LABNOV) tem publicado uma série de estudos sobre a preparação de membranas com a finalidade de tratar diversos efluentes (Scheibler et al, 2014;Silva et al, 2017;Cunha et al, 2018;Barbosa et al, 2020;Silva et al, 2021;Araújo et al, 2021). Este estudo é parte integrante desta linha de pesquisa.…”

Section: Introductionunclassified

Membrana cerâmica de baixo custo para tratamento de efluentes oleosos

Silva

Barbosa

et al. 2021

RSD

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A poluição das águas é um dos grandes desafios da sociedade. Dentre os contaminantes, a grande quantidade de atividades industriais responsáveis pela geração de efluentes oleosos destaca-se pelos seus impactos causados ao meio ambiente, afetando, por exemplo, a manutenção da vida marinha e a produtividade de solos. Entre as técnicas de tratamento, o uso de membranas cerâmicas destaca-se pela alta eficiência no tratamento de efluentes oleosos, principalmente emulsões óleo-água. Em linha com o desenvolvimento da química verde, associada com o baixo custo, este trabalho tem como objetivo preparar membranas cerâmicas com uso da argila brasgel, abundante do território paraibano. A argila foi caracterizada com uso das técnicas de Difração de raios X, Espectroscopia de Fluorescência de raios X por Energia Dispersiva, Espectroscopia na região do infravermelho, Adsorção Física de Nitrogênio e Análises térmicas. A membrana foi obtida através da técnica de compactação a seco uniaxial e sinterizada a 650 oC, sendo realizados fluxo de água e fluxo permeado para obtenção do coeficiente de rejeição da membrana. Os resultados obtidos indicam que a argila brasgel apresenta todas as características correspondentes a esmectita, e a membrana de baixo custo apresentou elevada capacidade de rejeição, 100.00 %, o que a torna viável para tratamento de emulsões óleo água.

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Zeolitic Imidazolate Framework ZIF-ZNI Nanocrystals used for Oil-water Separation

Tomaz

Rodrigues

Barbosa

et al. 2022

CNM

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Background: The oil removal from industrial effluents is one of the biggest problems faced in the world. It is a very important environmental issue and it is necessary to solve this problem. In this sense, ZIFs are increasingly important in the environmental area. Objective: This work reports a method for the synthesis of ZIF-zni nanocrystals, at room temperature in 1 h, and a performance of the ZIF-zni nanoadsorbent in the oil removal from oil-water emulsion. Methods: ZIF-zni was produced from the solvothermal method and it was characterized by X-ray diffraction, electron microscopy, contact angle, infrared spectroscopy and thermogravimetry. Oil-water emulsion was produced by lubricant oil and distilled water. Batch-type adsorption at 200 rpm for 2 h was used to evaluate the potential of ZIF-zni for the separation of the oil-water emulsion with initial oil concentration (100, 300 mg/L) and temperature (30, 60 °C). Results: The characterizations showed that the crystalline phase of ZIF-zni was successfully obtained. The ZIF-zni exhibit a very high removal percentage (above 95 %) and adsorption capacity. The predictions of multiple linear regression models determined based on the factorial design of experiments are excellent. Conclusion: The value up to 2879 mg/g of adsorption capacity was reached, thus indicating that the use of the nanoadsorbent ZIF-zni has great potential in the process of separating oil-water emulsion.

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Preparation and Characterization of Tubular Composite Membranes and their Application in Water Flow Measurements

Cited by 3 publications

References 0 publications

Synthesis of SAPO-34 Zeolite Membrane: Influence of Sources of Silica

Synthesis of SAPO-34 Zeolite Membrane: Influence of Sources of Silica

Membrana cerâmica de baixo custo para tratamento de efluentes oleosos

Zeolitic Imidazolate Framework ZIF-ZNI Nanocrystals used for Oil-water Separation

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