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Roles of surfactants in pressure-driven membrane separation processes: a review

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Abstract

Surfactants widely exist in various kinds of wastewaters which could be treated by pressure-driven membrane separation (PDMS) techniques. Due to the special characteristics of surfactants, they may affect the performance of membrane filtration. Over the last two decades, there are a number of studies on treating wastewaters containing surfactants by PDMS. The current paper gives a review of the roles of surfactants in PDMS processes. The effects of surfactants on membrane performance were discussed via two aspects: influence of surfactants on membrane fouling and enhanced removal of pollutants by surfactants. The characteristics of surfactants in solution and at solid–liquid interface were summarized. Surfactants in membrane filtration processes cause membrane fouling mainly through adsorption, concentration polarization, pore blocking, and cake formation, and fouling degree may be influenced by various factors (feed water composition, membrane properties, and operation conditions). Furthermore, surfactants may also have a positive effect on membrane performance. Enhanced removal of various kinds of pollutants by PDMS in the presence of surfactants has been summarized, and the removal mechanism has been revealed. Based on the current reports, further studies on membrane fouling caused by surfactants and enhanced removal of pollutants by surfactant-aided membrane filtration were also proposed.

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Abbreviations

AFM:

Atomic force microscope

CA:

Cellulose acetate

CFD:

Computational fluid dynamics

CMC:

Critical micelle concentration

CPC:

Cetyl pyridinium chloride

CTAB:

Hexadecyl trimethyl ammonium bromide

EO:

Ethylene oxide

MF:

Microfiltration

MWCO:

Molecular weight cutoff

NF:

Nanofiltration

NP-9:

Nonylphenol polyethylene glycol ether

ODA:

Octadecylamine

PA:

Polyamide

PAN:

Polyacrylonitrile

PDMS:

Pressure-driven membrane separation

PES:

Polyether sulfone

PS:

Polysulfone

PTFE:

Polytetrafluoroethylene

PVDF:

Polyvinylidene fluoride

RC:

Regenerated cellulose

RIS:

Resistance in series

RO:

Reverse osmosis

UF:

Ultrafiltration

SDS:

Sodium dodecyl sulfate

SDBS:

Sodium dodecyl benzene sulfonate

SEM:

Scanning electron microscope

TMP:

Transmembrane pressure

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Funding

This study was financially supported by the National Natural Science Foundation of China (51578222, 51178172, 51521006, 51308076, and 51378190), the Project of Chinese Ministry of Education (113049A), the Research Fund for the Program for Chang jiang Scholars and Innovative Research Team in University (IRT-13R17), and the Hunan Provincial Innovation Foundation for Postgraduate (Grant No. CX2015B092).

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Correspondence to Jinhui Huang or Guangming Zeng.

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Responsible editor: Angeles Blanco

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Shi, L., Huang, J., Zeng, G. et al. Roles of surfactants in pressure-driven membrane separation processes: a review. Environ Sci Pollut Res 26, 30731–30754 (2019). https://doi.org/10.1007/s11356-019-06345-x

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  • DOI: https://doi.org/10.1007/s11356-019-06345-x

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