Rejection of trace pharmaceutically active compounds present in municipal wastewaters using ceramic fine ultrafiltration membranes: Effect of feed solution pH and fouling phenomena

García-Ivars, Jorge; Durá-María, Javier; Moscardó-Carreño, Carlos; Carbonell-Alcaina, Carlos; Alcaina–Miranda, M.I.; Iborra–Clar, M.I.

doi:10.1016/j.seppur.2016.11.027

Cited by 61 publications

(38 citation statements)

References 57 publications

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“…Ion adsorption may happen due to the interaction of the membrane and ions. The adsorbed organic and inorganic compounds may form a foulant layer that serves as a second barrier for the separation . It is likely that this phenomenon narrowed the membrane pores and, therefore, reduced the transportability of the pesticides through the membrane.…”

Section: Resultsmentioning

confidence: 99%

Impact of Solute Properties and Water Matrix on Nanofiltration of Pesticides

et al. 2019

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The application of different nanofiltration membranes for the separation of pesticides, i.e., atrazine and dimethoate, from aqueous solutions is described. The nanoflitration membranes DK, NF270, NF200, and NF90 were tested for the pesticide retention performance in a stirred dead-end filtration system. NF90 demonstrated the best pesticide retention with over 95 % for atrazine and approximately 80 % for dimethoate. All membranes consistently showed better retention of atrazine than of dimethoate. Dissolving the pesticides in river or tap water amplified the overall pesticide retention performance, indicating that filtration in water treatment plants could render superior pesticide retention. However, a lower flux was obtained for the filtration of tap and river water.

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Section: Resultsmentioning

confidence: 99%

Impact of Solute Properties and Water Matrix on Nanofiltration of Pesticides

et al. 2019

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“…Furthermore, much research is conducted in the oil and gas industry [11][12][13][14][15][16] as well as in the vegetable oil industry [11,15]. Lastly, ceramic membranes are forthcoming for sewage treatment [17,18] or its effluent [19] and for seawater desalination, specifically as pretreatment for reverse osmosis [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Quantifying defects in ceramic tight ultra- and nanofiltration membranes and investigating their robustness

Kramer

Shang

Scherrenberg

et al. 2019

Separation and Purification Technology

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Quantifying defects in ceramic tight ultra-and nanofiltration membranes and investigating their robustness Kramer, F. C.; Shang, R.; Scherrenberg, S. M.; Rietveld, L. C.; Heijman, S. J.G. A B S T R A C TOne of the perceived benefits of ceramic membranes is their robustness, which makes them suitable for treating high organic load waste streams. In particular, ceramic tight ultrafiltration (tUF) and nanofiltration (NF) form an important barrier against small colloids and organic molecules. In order to achieve this barrier, the quality of the membranes should be uncompromised.An extension on a commonly used size exclusion method was developed in order to quantify defects in membranes and calculate the MWCO accurately excluding the defects. This approach gives a better representation of the membrane quality than the original method. The quality of a broad range of commercial ceramic membranes was investigated by determining the (i) hydraulic permeability, (ii) molecular weight cutoff, and (iii) quantitative defects. Several membranesboth tubular and disc membranes, selected from various supplierswere tested to investigate their variability. Furthermore, the robustness of tubular NF membranes was studied by monitoring the effect of long-term exposure to sodium hypochlorite, which is commonly used to mitigate organic fouling.The results showed that batches of both tubular and disc membranes of different pore size and suppliers included membranes with defects. Furthermore, the long-term treatment of tubular ceramic membranes with sodium hypochlorite negatively affected, beyond expectation, the quality of the membranes. The separation layer in these membranes was not notably compromised by sodium hypochlorite exposure, but the end seal layer was damaged.

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“…UF will play a predominant role for removal of refractory pollutants like pharmaceutical substances either as the only treatment or as pretreatment for other techniques like nanofiltration or adsorption. [2][3][4][5] The use of UF as tertiary treatment was proposed some decades ago. 6 However, this technique has not been implemented to the expected extent, and one of the reasons that can explain this is undoubtedly the main operating problem of the membranes, i.e.…”

Section: Introductionmentioning

confidence: 99%

Fractionation of secondary effluents of wastewater treatment plants in view of the evaluation of membrane fouling in a further ultrafiltration step

Ferrer‐Polonio

McCabe

Mendoza–Roca

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Ultrafiltration is used as tertiary treatment in wastewater treatment plants (WWTP) for wastewater reclamation. However, membrane fouling is the main drawback of the process. In this work a new effluent organic matter fractionation procedure with adsorption resins (XAD‐8, XAD4 and IRA‐958) has been applied without recovering the adsorbed fractions. In this way, strong and weak hydrophobic and charged hydrophilic substances of the dissolved organic matter (DOM) were removed for further ultrafiltration, in order to know the most fouling fraction. For this, secondary effluents of two WWTP and two membranes with different molecular weight cut‐offs (100 kDa and 3 kDa) were used in ultrafiltration experiments in a laboratory plant. RESULTS The hydrophobic substances (especially the strong hydrophobics) predominated over the hydrophilic compounds. Membrane fouling was higher for the membrane with the highest molecular weight cut‐off (100 kDa). Thus, flux decline was around 25–47% higher than that measured for the 3 kDa membrane. The charged hydrophilic substances (CHi) were identified as the most fouling compounds with 100 kDa membrane. Reversible fouling was predominant. CONCLUSIONS The proposed fractionation system enabled determination of the contribution of the different fractions to the DOM. © 2017 Society of Chemical Industry

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Rejection of trace pharmaceutically active compounds present in municipal wastewaters using ceramic fine ultrafiltration membranes: Effect of feed solution pH and fouling phenomena

Cited by 61 publications

References 57 publications

Impact of Solute Properties and Water Matrix on Nanofiltration of Pesticides

Impact of Solute Properties and Water Matrix on Nanofiltration of Pesticides

Quantifying defects in ceramic tight ultra- and nanofiltration membranes and investigating their robustness

Fractionation of secondary effluents of wastewater treatment plants in view of the evaluation of membrane fouling in a further ultrafiltration step

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