Magnetic Amphiphilic Composites Applied for the Treatment of Biodiesel Wastewaters

Lemos, Bruno Rocha Santos; Teixeira, Ana Paula C.; Ardisson, José D.; Macedo, W. A. A.; Fernandez-Outon, L.E.; Amorim, Camila C.; Moura, Flávia C.C.; Lago, Rochel M.

doi:10.3390/app2020513

Cited by 24 publications

(14 citation statements)

References 22 publications

(26 reference statements)

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“…In further recycling tests, the M-EC was found to remain effective in demulsifying water in diluted bitumen emulsions after up to 10 times reuse by magnetic separation and solvent washing. 469 Interestingly, this novel concept of magnetic nanoparticle-based demulsifiers has been further developed for the synthesis of other novel demulsifiers, such as magnetic poly(methylmethacrylate-acrylic acid-divinylbenzene) iron oxide (P(MMA-AA-DVB)/Fe 3 O 4 ) Janus particles, 470 nanostructured magnetic amphiphilic composites, 471 and single-layer oleic acid-coated magnetite (Fe 3 O 4 @OA) nanoparticles. 472 4.4.4 Electric field enhanced demulsification.…”

Section: Demulsification Of Heavy Oil Emulsionsmentioning

confidence: 99%

Interfacial sciences in unconventional petroleum production: from fundamentals to applications

et al. 2015

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With the ever increasing demand for energy to meet the needs of growth in population and improvement in the living standards in particular in developing countries, the abundant unconventional oil reserves (about 70% of total world oil), such as heavy oil, oil/tar sands and shale oil, are playing an increasingly important role in securing global energy supply. Compared with the conventional reserves unconventional oil reserves are characterized by extremely high viscosity and density, combined with complex chemistry. As a result, petroleum production from unconventional oil reserves is much more difficult and costly with more serious environmental impacts. As a key underpinning science, understanding the interfacial phenomena involved in unconventional petroleum production, such as oil liberation from host rocks, oil-water emulsions and demulsification, is critical for developing novel processes to improve oil production while reducing GHG emission and other environmental impacts at a lower operating cost. In the past decade, significant efforts and advances have been made in applying the principles of interfacial sciences to better understand complex unconventional oil-systems, while many environmental and production challenges remain. In this critical review, the recent research findings and progress in the interfacial sciences related to unconventional petroleum production are critically reviewed. In particular, the chemistry of unconventional oils, liberation mechanisms of oil from host rocks and mechanisms of emulsion stability and destabilization in unconventional oil production systems are discussed in detail. This review also seeks to summarize the current state-of-the-art characterization techniques and brings forward the challenges and opportunities for future research in this important field of physical chemistry and petroleum.

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Section: Demulsification Of Heavy Oil Emulsionsmentioning

confidence: 99%

Interfacial sciences in unconventional petroleum production: from fundamentals to applications

et al. 2015

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“…Os espectros são formados pela superposição de um dupleto bem definido característico de Fe +3 paramagnético, estrutura de aluminossilicatos, ou a óxidos de ferro sob relaxação superparamagnética, como hematita e/ou goethita com tamanho médio de partículas muito pequeno [26]. O campo máximo obtido (B hf (max) = 50,41 T) é menor que o valor característico para a hematita, 51,8 T, o que, de acordo com Cornell e Schwertmann [27], é característico de materiais que apresentam substituição isomórfica de Fe 3+ por Al 3+ e devido ao pequeno tamanho de partícula da hematita [28,29]. Os valores dos parâmetros hiperfinos obtidos pelos ajustes do espectro são descritos na Tabela 2.…”

Section: Caracterizaçãounclassified

Tratamento da lama vermelha com CO2 e ácido acético para aplicação em sistemasTipo Fenton e Fotocatálise

2019

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RESUMO A lama vermelha (LV_Nat) foi utilizada como matéria-prima para a preparação de dois materiais modificados com 1% (LV_1%) e 5% (LV_5%) de ácido acético. LV_Nat, LV_1% e LV_5% foram caracterizados (composição mineralógica, área BET específica, microscopia eletrônica de varredura, difração de raios X, espectroscopia XANES na borda-K do Fe, infravermelho (FTIR) e espectroscopia Mössbauer) e utilizados em testes catalíticos. Observou-se que o tratamento aumentou a área superficial da LV cerca de quatro vezes. Através de testes oxidativos realizados com azul de metileno (AM), verificou-se que o sistema mais adequado para ambos materiais foi o sistema Foto-Fenton, com 100% de degradação após 3 h de reação para LV_5% e após 4 h para a LV_1%. O ácido acético comportou-se como co-catalizador sendo muito efetivo, apresentando resultados observados com o uso de ácido orgânico equimolar com H2O2. A aplicação de lama vermelha modificada nos processos catalíticos oxidativos é uma alternativa atraente, que pode contribuir diretamente para o uso de resíduos orgânicos.

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“…PAM (polyacrylamide), NaHCO 3 and CuSO 4 •5H 2 O were obtained from Alfa-Aesar. Commercial Fe/C ceramic-filler (CF, employed as comparison materials) and commercial lightweight-ceramic-filler (LCF, applied as filler for BAFs in pilot-scale test) which had been frequently utilized in our previous studies [24][25][26] were shown in Table 2. Table 2.…”

Section: The Tncs and Codcr Removal By Systemmentioning

confidence: 99%

Pilot-Scale Production, Properties and Application of Fe/Cu Catalytic-Ceramic-Filler for Nitrobenzene Compounds Wastewater Treatment

Yang

Liu

2018

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Iron powder, Kaolin powder and CuSO4∙5H2O were employed as the main materials for the pilot-scale production of Fe/Cu catalytic- ceramic-filler (CCF) by way of wet type replacement-thermo-solidification. The physical properties, half-life, microstructure, removal rate of nitrobenzene compounds and the biodegradability-improvement of military chemical factory comprehensive wastewater were tested in comparison with commercial Fe/C ceramic-filler (CF). Catalytic micro-electrolysis bed reactors (CBRs) designed as pretreatment process and BAFs (Biological Aerated Filters) were utilized in a 90 days field pilot-scale test at last. The results showed the characteristics of optimum CCF were: 1150 kg/m3 of bulk density, 1700 kg/m3 of grain density, lower than 3.5% of shrinking ratio, 3.5% of 24 h water absorption, 6.0 Mpa of numerical tube pressure, 0.99 acid-resistance softening co-efficiency and 893.55 days of half-life. 25% addition of Fe with 1% of copper plating rate was efficient for the removal of nitrobenzene compounds and significant in promoting the biodegradability of military chemical factory comprehensive wastewater. The two-stage design of CBRs and BAFs showed high dependability and stability for the practical engineering application.

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Magnetic Amphiphilic Composites Applied for the Treatment of Biodiesel Wastewaters

Cited by 24 publications

References 22 publications

Interfacial sciences in unconventional petroleum production: from fundamentals to applications

Interfacial sciences in unconventional petroleum production: from fundamentals to applications

Tratamento da lama vermelha com CO2 e ácido acético para aplicação em sistemasTipo Fenton e Fotocatálise

Pilot-Scale Production, Properties and Application of Fe/Cu Catalytic-Ceramic-Filler for Nitrobenzene Compounds Wastewater Treatment

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