1,4-Dioxane removal from water and membrane fouling elimination using CuO-coated ceramic membrane coupled with ozone

Scaratti, Gidiane; Júnior, Agenor De Noni; José, Humberto Jorge; Moreira, Regina de Fátima Peralta Muniz

doi:10.1007/s11356-019-07497-6

Cited by 27 publications

(13 citation statements)

References 37 publications

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“…In this research the best results were obtained, when the ceramic membrane was coated repeatedly for 80 times. The same was observed by Scarati et al [8]. An increase in the catalyst (CuO) loading was found to favor the decomposition of ozone and to enhance the production of hydroxyl radicals; as a result, the removal of 1,4-dioxane and its secondary by-products was also increased.…”

Section: Coating Timessupporting

confidence: 80%

“…Then the Catalytic Membrane Contactor (CMC) is transformed into a unit that acts simultaneously as a contactor (improving the ozone diffusion/transfer) and as a reactor (for the oxidation of organic compounds) [10]. As a general rule, when the catalyst is immobilized onto the membrane surface, its catalytic activity is usually lower than when it is used as an aqueous suspension [8].…”

Section: Catalytic Ozonationmentioning

confidence: 99%

“…Copper oxide (CuO) was examined by Scarati et al [8] as catalytic coating. As with previous publications, it was shown that the deposition of a metal oxide in the surface of membrane without the application of ozone did not decrease the fouling of membrane.…”

Section: Fouling Controlmentioning

confidence: 99%

“…The third hybrid process can take place with the use of catalytic membranes, which is the major subject of this review. Catalytic membrane ozonation is a promising process that improves the anti-fouling properties of the membrane, enhances the removal of organic pollutants, and means that the catalyst deposited onto the membrane surface does not need to be recovered for potential reuse [8].…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Ozonation and Membrane Contactors—A Review Concerning Fouling Occurrence and Pollutant Removal

Psaltou

Zouboulis

2020

Water

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Membrane filtration has been widely used in water and wastewater treatment. However, this process is not very effective for the removal of refractory organic compounds (e.g., of pharmaceutical origin). Coupling membrane filtration with ozonation (or other Advanced Oxidation Methods) can enhance the degradation of these compounds and, subsequently, the incidence of membrane fouling (i.e., the major problem of membrane uses) would be also limited. Ozonation is an efficient oxidative process, although ozone is considered to be a rather selective oxidant agent and sometimes it presents quite low mineralization rates. An improvement of this advanced oxidation process is catalytic ozonation, which can decrease the by-product formation via the acceleration of hydroxyl radicals production. The hydroxyl radicals are unselective oxidative species, presenting high reaction constants with organic compounds. An efficient way to couple membrane filtration with catalytic ozonation is the deposition of an appropriate solid catalyst onto the membrane surface. However, it must be noted that only metal oxides have been used as catalysts in this process, while the membrane material can be of either polymeric or ceramic origin. The relevant studies regarding the application of polymeric membranes are rather scarce, because only a few polymeric materials can be ozone-resistant and the deposition of metal oxides on their surface presents several difficulties (e.g., affinity etc.). The respective literature about catalytic membrane ozonation is quite limited; however, some studies have been performed concerning membrane fouling and the degradation of micropollutants, which will be presented in this review. From the relevant results it seems that this hybrid process can be an efficient technology both for the reduction of fouling occurrence as well as of enhancement of micropollutant removal, when compared to the application of single filtration or ozonation.

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Section: Coating Timessupporting

confidence: 80%

Section: Catalytic Ozonationmentioning

confidence: 99%

Section: Fouling Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Catalytic Ozonation and Membrane Contactors—A Review Concerning Fouling Occurrence and Pollutant Removal

Psaltou

Zouboulis

2020

Water

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“…The prominent radical species in most cases were the hydroxyl ones, noting also that in some cases both hydroxyl and superoxide radicals were found to participate in the oxidation process [27]. However, Scarati et al [28] have noticed that when CuO was used as (catalytic) coating for membranes, then the primary radical species were the superoxide radicals, which however did not lead to the further production of hydroxyl radicals. Although, the superoxide radicals are part of the ozone decomposition mechanism towards the formation of hydroxyl radicals [29,30], it seems that in the aforementioned case the decomposition pathway was different.…”

Section: Catalytic Membrane Contactorsmentioning

confidence: 99%

Catalytic Membrane Ozonation

2021

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Catalytic membrane ozonation is a hybrid process that combines membrane filtration and catalytic ozonation. The membrane deposited with an appropriate solid material acts as catalyst. As a consequence, the catalytic membrane contactor can act simultaneously as contactor (i.e., improving the transfer/dissolution of gaseous ozone into the liquid phase), as well as reactor (i.e., oxidizing the organic compounds). It can be used in water and wastewater treatment limiting the disadvantages of membrane filtration (i.e., lower removal rates of emerging contaminants or fouling occurrence) and ozonation (i.e., selective oxidation, low mineralization rates, or bromate (BrO3−) formation). The catalytic membrane ozonation process can enhance the removal of micropollutants and bacteria, inhibit or decrease the BrO3− formation and additionally, restrict the membrane fouling (i.e., the major/common problem of membranes’ use). Nevertheless, the higher operational cost is the main drawback of these processes.

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