Ozonation as a pretreatment for nanofiltration: Effect of oxidation pathway on the permeate flux

Byun, Seokjong; Taurozzi, Julian S.; Tarabara, Volodymyr V.

doi:10.1016/j.seppur.2015.05.035

Cited by 22 publications

(12 citation statements)

References 42 publications

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“…Therefore many researchers try to develop novel solutions, such as combined methods [3,10,28,29], modified membrane surfaces [2,25,27,30] or cleaning techniques [21,31,32] to solve this problem. There are many reports in the literature in which membrane separation combined with pre-ozonation resulted in lower filtration resistances and/or fouling or even higher purification efficiency in case of different water contaminants [28,[33][34][35][36][37]. Moreover, pre-ozonation resulted in higher fluxes in case of petroleum contaminated water (d oil droplets < 5 µm) as it was published in a previous report [20].…”

Section: G Veréb Et Al / Desalination and Water Treatmentmentioning

confidence: 77%

Effects of pre-ozonation in case of microfiltration of oil contaminated waters using polyethersulfone membrane at various filtration conditions

Veréb¹,

Zakar²,

Kovács³

et al. 2017

Desalination and Water Treatment

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a b s t r a c tIn the present study membrane filtration was applied for the purification of crude oil containing stable oil in water emulsions (c oil = 100 ppm; d oil droplets < 1.5 µm) with and without pre-ozonation using polyethersulfone (PES) microfiltration membrane (d pore = 0.2 µm). The effect of ozonation on the size of oil droplets and on Zeta-potential was determined by dynamic light scattering measurements. The effects of applied transmembrane pressure, stirring speed and duration of ozonation were investigated in detail. Removal efficiency was determined by measuring turbidity, chemical oxygen demand (COD), total organic carbon content (TOC) and extractable oil content (TOG/TPH). Results pointed out, that short pre-ozonation (absorbed ozone was 30 ± 5 mg L -1 ) causes increased fluxes and decreased resistance without notable change in the purification efficiency in case of low transmembrane pressure (0.1 MPa). However longer pre-ozonation or higher transmembrane pressure results in increased irreversible resistance, lower permeate fluxes or even lower purification efficiency.

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Section: G Veréb Et Al / Desalination and Water Treatmentmentioning

confidence: 77%

Effects of pre-ozonation in case of microfiltration of oil contaminated waters using polyethersulfone membrane at various filtration conditions

Veréb¹,

Zakar²,

Kovács³

et al. 2017

Desalination and Water Treatment

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“…Maintaining the transport properties and reducing the effect of biofouling on pressure membranes can also be achieved by using the pre-ozone process [68,69]. It has been confirmed that ozone at a concentration of 0.2:0.4 mgO 3 /mgDOC contributes significantly to improve the separation and transport properties of NF membranes [69]. It is necessary to consider the economic costs between the use of pre-ozonation and cleaning with chemicals.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the effect of body fluid analogs on the parameters of nanofiltration during the purification of swimming pool water

2019

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This study presents the possible application of membrane nanofiltration for purifying swimming pool water by removing compounds from human body secretions. The effect of the matrix (swimming pool, demineralized, tap water) on the analyzed pollutants was evaluated. We used asymmetric flat membranes (polyamide-thin film composite) in a dead-end filtration system. The effect of the matrix on the transport properties of the membranes was noticeable. A maximum reduction in value of permeate flux was obtained for 15.6 μL fluid analog solution/L of pool water. For all the analyzed matrices, a distinct reduction in the value of relative permeate flux was obtained along with an increase in the content of the investigated compounds in the feed. There was a marked increase in the separation properties along with an increase in the pollutants. The average value of the retention coefficient for total organic carbon was 87.21% and 79.67% for the concentrations of 3.90 and 15.60 μL fluid analog solution/L of pool water, respectively. This study provides evidence that further research into highly effective solutions for purifying pool water would be beneficial.

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“…Vatankhah et al (2018) have applied a pre-ozonation step before the nanofiltration of wastewater effluent and found that at a specific ozone dose of 0.2 mgO3/mgC showed a significant reduction in fouling compared to the nanofiltration with no pre-ozonation. Moreover, the selectivity and rejection capabilities of NF may be utilized to remove the degradation by-products generated by the ozonation process (Byun et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Fate and Toxicity of Carbamazepine and Its Degradation By-Products During Coupling of Ozonation and Nanofiltration for Urban Wastewater Reuse

Yacouba

Lesage

Mendret

et al. 2021

Front. Environ. Chem.

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Occurrence of emerging organic micropollutants in water bodies and their effects are a concern related to quality of reused water. Advanced oxidation processes have demonstrated promising results to address this challenge. Nonetheless, these processes may lead to the generation of more toxic oxidation by-products. The aim of this study was to investigate the coupling of ozonation and nanofiltration (NF) applied to carbamazepine (CBZ). It consisted in monitoring the degradation and fate of CBZ and its subsequent by-products, their fate and toxicity. CBZ was completely degraded after 5 min of ozonation and six identified transformation by-products were formed: I (hydroxycarbamazepine), BQM [1-(2-benzaldehyde)-4-hydro-(1H, 3H)-quinazoline-2-one], II (2-(1H)-quinazolinone), BaQM [1-(2-benzoic acid)-4-hydro-(1H, 3H)-quinazoline-2-one], BQD [1-(2-benzaldehyde)-(1H, 3H)-quinazoline-2,4-dione] and BaQD [1-(2-benzoic acid)-(1H, 3H)-quinazoline-2,4-dione]. Mineralization rate of ozonation never exceeded 12% even with high ozone dose. Bioassays with Vibrio fischeri revealed that BQM and BQD are responsible for toxicity. NF is able to remove total organic carbon with removal rate up to 93% at 85% of permeate recovery rate. CBZ and its different ozonation by-products were almost completely retained by NF, except the II, which had an MW slightly lower than the membrane molecular weight cut-off, for which the removal rate was still between 80 and 96% depending on the recovery rate.

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Ozonation as a pretreatment for nanofiltration: Effect of oxidation pathway on the permeate flux

Cited by 22 publications

References 42 publications

Effects of pre-ozonation in case of microfiltration of oil contaminated waters using polyethersulfone membrane at various filtration conditions

Effects of pre-ozonation in case of microfiltration of oil contaminated waters using polyethersulfone membrane at various filtration conditions

Evaluation of the effect of body fluid analogs on the parameters of nanofiltration during the purification of swimming pool water

Fate and Toxicity of Carbamazepine and Its Degradation By-Products During Coupling of Ozonation and Nanofiltration for Urban Wastewater Reuse

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