Transport mechanisms of dissolved organic compounds in aqueous solution during nanofiltration

Braeken, Leen; Bettens, Ben; Boussu, Katleen; Meeren, Paul Van der; Cocquyt, Jan; Vermant, Jan; Bruggen, Bart Van der

doi:10.1016/j.memsci.2005.12.024

Cited by 92 publications

(46 citation statements)

References 15 publications

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“…Ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO) are a pressure driven membrane process. UF and NF are mainly applied for wastewater treatment, drinking water production, and removal of small organic compounds [103] and color components [104], while RO can also be used for desalinization. The major properties of these three membrane processes are listed in Table 3.…”

Section: Nanomembranes For Treatment Of Water and Wastesmentioning

confidence: 99%

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Shan

Surampalli²,

Tyagi

et al. 2009

Front. Environ. Sci. Eng. China

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Nanomaterials are applicable in the areas of reduction of environmental burden, reduction/treatment of industrial and agricultural wastes, and nonpoint source (NPS) pollution control. First, environmental burden reduction involves green process and engineering, emissions control, desulfurization/denitrification of nonrenewable energy sources, and improvement of agriculture and food systems. Second, reduction/treatment of industrial and agricultural wastes involves converting wastes into products, groundwater remediation, adsorption, delaying photocatalysis, and nanomembranes. Third, NPS pollution control involves controlling water pollution. Nanomaterials alter physical properties on a nanoscale due to their high specific surface area to volume ratio. They are used as catalysts, adsorbents, membranes, and additives to increase activity and capability due to their high specific surface areas and nano-sized effects. Thus, nanomaterials are more effective at treating environmental wastes because they reduce the amount of material needed.

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Section: Nanomembranes For Treatment Of Water and Wastesmentioning

confidence: 99%

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Shan

Surampalli²,

Tyagi

et al. 2009

Front. Environ. Sci. Eng. China

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“…Model calculation in previous studies showed that diffusion was often the predominant mass transport mechanism for a number of inorganic solutes (including mineral ions, arsenic and nitrogen compounds) [3,5,[24][25][26]. In contrast, experimental determination of the diffusion flux by conducting diffusion cell test indicated that diffusion played a minor role in mass transport of a number of organic solutes (including some disinfection by-products and pharmaceuticals (PhACs)) [27,28]. Though different solutes and NF membranes were used in the previous studies and as such a direct comparison may not be appropriate, contradiction between model calculation and experimental determination regarding the predominant mass transport mechanism during NF may indicate the improper quantification of the partitioning coefficients and the hindrance factors in the DSPM&DE model.…”

Section: Introductionmentioning

confidence: 99%

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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“…The commercial NF filtration membrane (NF270) employed was supplied by DOW FilmTec (Minneapolis, MN). NF270 membrane is composed of an active semi-aromatic piperazine-based polyamide layer supported on a microporous polysulfone layer [33], and the membrane features a pore size of 0.34 nm [34].…”

Section: Methodsmentioning

confidence: 99%

Perfluorooctane sulfonate removal by nanofiltration membrane—the effect and interaction of magnesium ion / humic acid

Zhao

Tang

et al. 2016

Journal of Membrane Science

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a b s t r a c tAlthough the presence of perfluorooctane sulfonate (PFOS) in environmental systems has generated widespread interest, little information is available on PFOS removal from surface water by membrane technology. Herein, a novel nanofiltration membrane (NF270) was investigated so as to remove PFOS. More specifically, the interaction and effect of Mg 2 þ ion and/or humic acid (HA) in the feed solution on PFOS removal efficiency and total permeate flux were examined. Under 0.8 MPa, an improvement in PFOS rejection efficiency from 94.3% to 99.5% was observed when the concentration of Mg 2 þ ion was increased from 0-2 mM in the feed solution. This enhancement is attributed to enhanced size exclusion because PFOS molecules are linked together by Mg 2 þ ion, as shown by Density Functional Theory (DFT)calculation. The result shows that Mg 2 þ ion can more easily neutralize two PFOS anion than one PFOS anion on the basis of the Gibbs free energy changes. Conversely, the presence of HA had minimal improvement on PFOS rejection because HA had much weaker ability to bind with PFOS comparing to Mg 2 þ . Consequently, The further interaction between Mg 2 þ and the carboxylic groups of HA molecule, carboxylic group or amino group of NF270 membrane was also calculated via DFT theory. Corresponding DFT structures and calculation parameters of Mg 2 þ with different groups were obtained. These findings indicate that the size exclusion mechanism primarily governs PFOS removal by the NF270 membrane. Flux results showed that the co-presence of Mg 2 þ ion and HA in the feed solution resulted in the most flux reduction, by 70%, that was associated with the thickest fouled layer.

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Transport mechanisms of dissolved organic compounds in aqueous solution during nanofiltration

Cited by 92 publications

References 15 publications

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

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

Perfluorooctane sulfonate removal by nanofiltration membrane—the effect and interaction of magnesium ion / humic acid

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