【HMD】Polymeric mixed-matrix membranes modified with halloysite nanotubes for water and wastewater treatment: A review

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Polymeric mixed-matrix membranes modified with halloysite nanotubes for water and wastewater treatment: A review

Highlights

Overview of reports on the properties and modification of halloysite nanotubes.

Effect of pure and modified halloysite on the performance of polymeric membranes.

Permeability, separation and antifouling properties of the modified membranes.

A review on antibacterial properties of membranes with modified halloysite.

Abstract

Polymeric membranes are widely applied for water and wastewater treatment. However, the membranes used in the pressure driven membrane processes suffer from the undesired phenomena of fouling and biofouling. That leads to a decrease in productivity and an increase in treatment costs. The membranes used in forward osmosis, being a non – pressure driven process, are less endangered by fouling; nonetheless, due to low permeation they have limited potential in wastewater treatment. To improve the membranes performance with reference to permeability, antifouling/antibiofouling resistance and separation properties the application of various nanomaterials has been proposed. This review presents a progress in the research on the polymer mixed-matrix membranes containing pure and modified halloysite nanotubes (HNTs). The effect of HNTs on the properties and performance of membranes made of polymers such as polysulfone, polyethersulfone, polystyrene and polyvinylidene fluoride is widely discussed. Finally, the key issues to be considered in further research on the mixed-matrix membranes modified with HNTs are proposed.

Keywords

Membrane

Halloysite

Permeability

Fouling

Separation

Abbreviations

ACA

advancing contact angle

AEAPTMS

N-(2-aminoethyl)-3-amino-propyl-trimethoxysilane

APTES

(3-aminopropyl)triethoxysilane

B/A

salt/water permeability ratio

COD

chemical oxygen demand

CPS

3-chloropropyltrimethoxysilane

DA/Fe3O4/KH550

dopamine/iron oxide/silane coupling agent

DSC

differential scanning calorimetry

D/W

diesel oil/water emulsion

EDC

1-ethyl-3-[3-dimethylamino)propyl]carbodiimide hydrochloride

g-C3N4

graphitic carbon nitride

HMDI

1,6-hexamethylenediisocyanate

H/W

n-hexadecane/water emulsion

KH550

silane coupling agent

K/W

kerosene/water emulsion

LPD

L-DOPA, L-3,4-dihydroxyphenylalanine

MPC

2-methacryloyloxyethyl phosphorylcholine

PEUF

polymer enhanced ultrafiltration

PSS

poly(sodium-4-styrene sulfonate)

PVDF

polyvinylidene fluoride

P/W

petroleum ether/water emulsion

RCA

receding contact angle

RFR

relative flux reduction

rGO

reduced graphene oxide

ROMP

ring-opening metathesis polymerization

ROS

reactive oxygen species

SEM

scanning electron microscopy

TEM

transmission electron microscopy

TFN

thin film nanocomposite

Tg

glass transition temperature

TGA

thermogravimetric analysis

TMP

transmembrane pressure

TSS

total suspended solids

V/W

vegetable oil/water emulsion

© 2020 Elsevier B.V. All rights reserved.

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