Performance of nanofiltration membrane in rejecting trace organic compounds: Experiment and model prediction

Wang, Xiaomao; Li, Bing; Zhang, Tong; Li, Xiaoyan

doi:10.1016/j.desal.2015.05.010

Cited by 91 publications

(48 citation statements)

References 42 publications

(65 reference statements)

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“…The DSPM&DE model was used to predict the rejection ratios. Results showed that the model generally over-predicted the rejection of most tested TOrCs apart from a few exceptions [14][15][16][17]. The lower-than-predicted rejection was attributed to the high hydrophobicity that is common for organic compounds [18].…”

Section: Introductionmentioning

confidence: 81%

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Assessment of the hindered transport model in predicting the rejection of trace organic compounds by nanofiltration

Kong

Yang

Wang

et al. 2016

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 81%

“…Most PhACs would behave differently from the probe solutes. Previous studies [16,17] showed that the DSPM&DE model generally over-predicted the rejection of PhACs by NF membranes. The ultimate goal of this study was to further increase the applicability of the DSPM&DE model to predict the rejection of organic compounds.…”

Section: Introductionmentioning

confidence: 98%

Assessment of the hindered transport model in predicting the rejection of trace organic compounds by nanofiltration

Kong

Yang

Wang

et al. 2016

Journal of Membrane Science

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“…5,[7][8][9][10] In addition, NF technology is reported to be efficient in the separation of organic micro-pollutants, while the main disadvantage of this technology is its high energy consumption due to the high operational pressures. 6,[11][12][13][14][15] On the other hand, the separation performance by MF and UF is limited by large pore size despite relatively lower operational pressure. To achieve a more cost-effective and efficient separation technology, the development of advanced membrane materials with a relatively high selectivity and low operational pressure is needed.…”

Section: Introductionmentioning

confidence: 99%

"SYNERGISTIC ABILITY OF PSf AND PVDF TO DEVELOP HIGH-PERFORMANCE PSf/PVDF COATED MEMBRANE FOR WATER TREATMENT"

2018

RJC

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In this study, asymmetric polysulfone (PSf)/polyvinylidene fluoride (PVDF) coated membranes were prepared from PSf/NMP/NH4Cl and PVDF/NMP/NH4Cl system via phase inversion induced by immersion precipitation. Effect of stirring time and cast thickness on morphology, mechanical strength, and pure water permeability of the prepared membranes were systematically studied by scanning electron microscopy (SEM), tensile tester and dead-end filtration experiments. The results demonstrated that the elevation in the stirring time resulted in higher porosity and greater formation of smaller pore sizes, which attributed to higher Young's modulus and comparable pure water permeability. The casting with different thicknesses was done in this study. It was shown that pores on the membrane surface become larger in size with an increase of cast thicknesses. At the same time, the porosity of the membranes was gradually reduced. When the 7 hours stirring time and 0.4 mm cast thickness was used in preparation, the membranes exhibited the excellent pure water permeability. In general, PSfPVDF coated membranes have an increased thermal resistance as the stirring time and casting thickness increases. In addition, chemical resistance analysis results showed higher acid resistance and lower alkaline resistance of the prepared membranes. On the whole, adjusting stirring time and cast thicknesses is an effective approach to tailor the mechanical strength, performance, thermal and also chemical resistance of the formed PSf/PVDF coated membranes.

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“…These emerging contaminants are associated with potential human, animal and ecological problems and they are mainly entering the environment through their release as free without further treatments or conjugate metabolites or their excretion from the human or animal body [3,4]. Among them, active pharmaceutical ingredients (APIs) or pharmaceutically active compounds (PhACs) are a broad and diverse group of organic substances used for preventing and treating diseases in humans and animals [5].…”

Section: Introductionmentioning

confidence: 99%

Removal of pharmaceutically active compounds by using low-pressure membrane processes

García-Ivars¹,

Iborra–Clar²,

Massella³

et al. 2017

dwt

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García-Ivars, J.; Iborra Clar, MI.; Massella, M.; Carbonell Alcaina, C.; Alcaina-Miranda, MI. (2017). Removal of pharmaceutically active compounds using low-pressure membrane processes. Desalination and Water Treatment. 69:252-260. doi:10.5004/dwt.2017 ABSTRACTThe increasing demand on water resources throughout the world has motivated researchers to seek new ways to obtain quality water increasing their interest in water reclamation. However, the presence of harmful organic chemicals such as pharmaceutically active compounds (PhACs) is a serious environmental concern. The objective of this study was to investigate the influence of the pH on the rejection of seven target PhACs (acetaminophen, caffeine, erythromycin, ibuprofen, naproxen, sulfamethoxazole, and trimethoprim) by different low-pressure membranes within the 2 fine ultrafiltration (UF) and loose nanofiltration (NF) range. For this purpose, three ceramic membranes and a polyamide membrane were used for UF and NF experiments, respectively. Experimental results indicated that PhACs with negative charge were effectively rejected at basic conditions (< 75% for UF, < 90% for NF), improving both their hydrophilicity and solubility with increasing pH. Furthermore, high soluble PhACs with high pKa values showed low rejection values (~15% for UF, ~30% for NF) and a pH-independent behaviour during low-pressure filtration experiments. Therefore, the use of low-pressure membranes could be considered as an appropriate and sustainable supplemental technique to remove PhACs in a wastewater treatment plant.

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Performance of nanofiltration membrane in rejecting trace organic compounds: Experiment and model prediction

Cited by 91 publications

References 42 publications

Assessment of the hindered transport model in predicting the rejection of trace organic compounds by nanofiltration

Assessment of the hindered transport model in predicting the rejection of trace organic compounds by nanofiltration

"SYNERGISTIC ABILITY OF PSf AND PVDF TO DEVELOP HIGH-PERFORMANCE PSf/PVDF COATED MEMBRANE FOR WATER TREATMENT"

Removal of pharmaceutically active compounds by using low-pressure membrane processes

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