A study on the performance of self-cleaning oil–water separation membrane formed by various TiO2 nanostructures

Tan, Benny Yong Liang; Tai, Ming Hang; Juay, Jermyn; Liu, Zhaoyang; Sun, Darren Delai

doi:10.1016/j.seppur.2015.09.060

Cited by 41 publications

(21 citation statements)

References 44 publications

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“…Oil is an important energy source in the world, however, when it is explored, transported or stored there is a risk of spillage (SYED et al, 2011). Spill accidents involving oil has occurred from natural sources or disposal disaster from industries and consequently it has been impacting the ecosystem (TAN et al, 2015). Along with industries, domestic effluents can also contain oil and their use are increasing fast (LU; YUAN, 2018).…”

Section: Oil Removalmentioning

confidence: 99%

“…Their results demonstrated that this material was more effective in removing these oils when compared to organic or inorganic adsorbents available in literature data. Tan et al (2015) evaluated the possibility of different structures of titanium dioxide (TiO 2 ) nanoparticles (nanowire, nanotube, and nanosheet) to perform as a filter. They developed nanostructures membranes that had superhydrophilic and underwater superoleophobic characteristics.…”

Section: Oil Removalmentioning

confidence: 99%

See 1 more Smart Citation

Applications of Nanotechnology in Water Treatment

Machado

Rodrigues

Feksa

et al. 2019

RCO

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The industrial contamination, along with domestic effluents, agricultural and urban runoff are contaminating rivers and making it difficult for conventional water treatment to remove all the pollutants. This contamination can impact in the quality of rivers, in the quality of life of aquatic animals and can impact in the human health through the consumption of water. In order to improve the water quality, nanotechnology has been studied as an alternative to better remove contaminants, such as, heavy metals, oily water separation and antimicrobial activity. Besides, with the increase in industrialization along with the contamination of rivers, seawater could be an interesting alternative for drinking water source after adequate treatment. Nanomaterials are being studied as a possibility to remove salt from seawater, making it possible to drink. Howerver, there is a need to elucidate the potential risks to the environemt that these nanomaterials can cause. Therefore, the aim of this review is to describe some applications of nanotechnology in water treatment regarding metals, oil removal from water, antimicrobial activity and desalination in order to improve water quality, as well, as discuss their potential risk to the environment. RESUMOA contaminação industrial, juntamente com efluentes domésticos, agricultura e escoamento urbano, estão contaminando os rios e dificultando para os tratamentos de água convencionais removerem todos os poluentes. Esta contaminação pode impactar na qualidade dos rios, na qualidade de vida dos animais marinhos e pode impactar na saúde humana através do consumo de água. Com a finalidade de melhorar a qualidade da água, a nanotecnologia tem sido estudada como uma alternativa para melhor remover os poluentes, como, metais pesados, separar óleo da água e atividade antimicrobiana. Além disso, com o aumento da industrialização juntamente com a contaminação dos rios, a água do mar poderia ser uma alternativa interessante como fonte de água potável após o tratamento adequado. Nanomateriais estão sendo estudado como uma possibilidade para remover o sal da água do mar, tornando-a possível de ser ingerida. Entretanto, há a necessidade de elucidar os potenciais riscos para o meio ambiente que estes nanomateriais podem causar. Sendo assim, o objetivo deste artigo de revisão é descrever algumas aplicações da nanotecnologia no tratamento de água em relação à remoção de metais e óleo da água, atividade antimicrobiana e a dessalinização a fim de melhorar a qualidade da água, assim como, discutir os potenciais riscos para o meio ambiente. Palavras-chave: Atividade antimicrobiana. Contaminação da água. Nanotecnologia. Poluentes. Riscos ambientais.

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Section: Oil Removalmentioning

confidence: 99%

Section: Oil Removalmentioning

confidence: 99%

Applications of Nanotechnology in Water Treatment

Machado

Rodrigues

Feksa

et al. 2019

RCO

View full text Add to dashboard Cite

show abstract

“…There are various methods to improve the hydrophilicity of membranes (Miller et al 2017;Van der Bruggen 2009) including sulfonation (Baroña et al 2007), carboxylation (Sajitha et al 2002), polymer blending (Fang et al 2017), plasma-or UV-induced grafting (Susanto et al 2007;Wavhal and Fisher 2002;Wu et al 2018), and nanoparticlebased surface modifications (Hu et al 2015;Islam et al 2017;Saki and Uzal 2018;Yi et al 2011;Yin and Zhou 2015;Zhou et al 2010). Among the various nanomaterials, the ones with photocatalytic properties can provideapart from the increased hydrophilicitythe possibility to degrade organic fouling contaminants by simple UVor solar irradiation, which proved to be efficient to decompose oily contaminants from membrane surfaces (Chang et al 2014;Gondal et al 2014;Moslehyani et al 2015;Pan et al 2012;Shi et al 2016;Tan et al 2015). In our recent studies (Kovács et al 2018;Veréb et al 2018a), TiO 2 and TiO 2 /CNT coatings resulted in excellent antifouling effect during the ultrafiltration of synthetic oilin-water emulsions and, in addition, TiO 2 /CNT-compositemodified membrane showed increased photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Intensification of the ultrafiltration of real oil-contaminated (produced) water with pre-ozonation and/or with TiO2, TiO2/CNT nanomaterial-coated membrane surfaces

Veréb

Kassai

Santos

et al. 2020

Environ Sci Pollut Res

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In the present study, commercial PES, PVDF, PTFE ultrafilter membranes, and two different nanomaterial (TiO 2 and TiO 2 /CNT composite)-covered PVDF ultrafilter membranes (MWCO = 100 kDa) were used for the purification of an industrial oilcontaminated (produced) wastewater, with and without ozone pretreatment to compare the achievable fouling mitigations by the mentioned surface modifications and/or pre-ozonation. Fluxes, filtration resistances, foulings, and purification efficiencies were compared in detail. Pre-ozonation was able to reduce the total filtration resistance in all cases (up to 50%), independently from the membrane material. During the application of nanomaterial-modified membranes were by far the lowest filtration resistances measured, and in these cases, pre-ozonation resulted in a slight further reduction (11-13%) of the total filtration resistance. The oil removal efficiency was 83-91% in the case of commercial membranes and > 98% in the case of modified membranes. Moreover, the highest fluxes (301-362 L m −2 h −1) were also measured in the case of modified membranes. Overall, the utilization of nanomaterial-modified membranes was more beneficial than pre-ozonation, but with the combination of these methods, slightly higher fluxes, lower filtration resistances, and better antifouling properties were achieved; however, preozonation slightly decreased the oil removal efficiency.

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“…Their fabrication methods, performances, and separation mechanisms as membrane materials have been thoroughly surveyed [ 26 , 27 ]. In general, the behavior of nanomaterials differs from that of bulk materials and depends on the particular nanostructure [ 28 ]. Due to their large surface area, nanosheets improve both the surface roughness and hydrophilicity in addressing organic fouling [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

et al. 2020

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In this study, the characteristics of different types of nanosheet membranes were reviewed in order to determine which possessed the optimum propensity for antifouling during water purification. Despite the tremendous amount of attention that nanosheets have received in recent years, their use to render membranes that are resistant to fouling has seldom been investigated. This work is the first to summarize the abilities of nanosheet membranes to alleviate the effect of organic and inorganic foulants during water treatment. In contrast to other publications, single nanosheets, or in combination with other nanomaterials, were considered to be nanostructures. Herein, a broad range of materials beyond graphene-based nanomaterials is discussed. The types of nanohybrid membranes considered in the present work include conventional mixed matrix membranes, stacked membranes, and thin-film nanocomposite membranes. These membranes combine the benefits of both inorganic and organic materials, and their respective drawbacks are addressed herein. The antifouling strategies of nanohybrid membranes were divided into passive and active categories. Nanosheets were employed in order to induce fouling resistance via increased hydrophilicity and photocatalysis. The antifouling properties that are displayed by two-dimensional (2D) nanocomposite membranes also are examined.

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A study on the performance of self-cleaning oil–water separation membrane formed by various TiO2 nanostructures

Cited by 41 publications

References 44 publications

Applications of Nanotechnology in Water Treatment

Applications of Nanotechnology in Water Treatment

Intensification of the ultrafiltration of real oil-contaminated (produced) water with pre-ozonation and/or with TiO2, TiO2/CNT nanomaterial-coated membrane surfaces

2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

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