Synthesis of Fe-Ag/f-MWCNT/PES nanostructured-hybrid membranes for removal of Cr(VI) from water

Monaheng L. Masheane; Lebea N. Nthunya; Soraya P. Malinga; Edward N. Nxumalo; Bhekie B. Mamba; Sabelo D. Mhlanga

doi:10.1016/j.seppur.2017.04.018

Synthesis of Fe-Ag/f-MWCNT/PES nanostructured-hybrid membranes for removal of Cr(VI) from water

Monaheng L. Masheane, Lebea N. Nthunya, Soraya P. Malinga, Edward N. Nxumalo, Bhekie B. Mamba, Sabelo D. Mhlanga

Chemical Sciences

University of South Africa

Research output: Contribution to journal › Article › peer-review

52 Citations (Scopus)

Abstract

This work describes the synthesis of Fe-Ag/functionalized-multiwalled carbon nanotube (f-MWCNT)/polyethersulphone (PES) nanostructured-hybrid membranes via a modified phase inversion method and its permeability properties. As-synthesized MWCNTs were first treated with acid and then Fe and Ag nanoparticles (Fe-Ag NPs) were uniformly dispersed on the surface of the f-MWCNTs using a microwave-assisted polyol method prior to addition to the PES polymer matrix. The addition of Fe-Ag/f-MWCNTs into the PES polymer increased the surface roughness of PES membranes and resulted to a higher hydrophilicity. Thermal stability and crystallinity properties of PES were significantly improved. The Fe-Ag/f-MWCNTs enhanced the surface charge density of the PES membranes and were found not to leach from PES. Performance evaluation studies revealed that the addition of Fe-Ag/f-MWCNTs into the PES polymer matrix increased water flux from 26.5 to 36.9 L/m² h and improved the rejection of Cr⁶⁺ ions (up to 94%) in a cross-flow system. Furthermore, the addition of Fe-Ag/f-MWCNTs improved fouling resistance of PES membranes. The improved properties of these hybrid membranes make the ideal for use as either point-of-use or end-of-use water purification system for production of potable water.

Original language	English
Pages (from-to)	79-87
Number of pages	9
Journal	Separation and Purification Technology
Volume	184
DOIs	https://doi.org/10.1016/j.seppur.2017.04.018
Publication status	Published - 2017

Keywords

Hybrid membranes
Multi-walled carbon nanotubes
Nanoparticles
Polyethersulfone
Water treatment

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.seppur.2017.04.018

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title = "Synthesis of Fe-Ag/f-MWCNT/PES nanostructured-hybrid membranes for removal of Cr(VI) from water",

abstract = "This work describes the synthesis of Fe-Ag/functionalized-multiwalled carbon nanotube (f-MWCNT)/polyethersulphone (PES) nanostructured-hybrid membranes via a modified phase inversion method and its permeability properties. As-synthesized MWCNTs were first treated with acid and then Fe and Ag nanoparticles (Fe-Ag NPs) were uniformly dispersed on the surface of the f-MWCNTs using a microwave-assisted polyol method prior to addition to the PES polymer matrix. The addition of Fe-Ag/f-MWCNTs into the PES polymer increased the surface roughness of PES membranes and resulted to a higher hydrophilicity. Thermal stability and crystallinity properties of PES were significantly improved. The Fe-Ag/f-MWCNTs enhanced the surface charge density of the PES membranes and were found not to leach from PES. Performance evaluation studies revealed that the addition of Fe-Ag/f-MWCNTs into the PES polymer matrix increased water flux from 26.5 to 36.9 L/m2 h and improved the rejection of Cr6+ ions (up to 94%) in a cross-flow system. Furthermore, the addition of Fe-Ag/f-MWCNTs improved fouling resistance of PES membranes. The improved properties of these hybrid membranes make the ideal for use as either point-of-use or end-of-use water purification system for production of potable water.",

keywords = "Hybrid membranes, Multi-walled carbon nanotubes, Nanoparticles, Polyethersulfone, Water treatment",

author = "Masheane, {Monaheng L.} and Nthunya, {Lebea N.} and Malinga, {Soraya P.} and Nxumalo, {Edward N.} and Mamba, {Bhekie B.} and Mhlanga, {Sabelo D.}",

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year = "2017",

doi = "10.1016/j.seppur.2017.04.018",

language = "English",

volume = "184",

pages = "79--87",

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T1 - Synthesis of Fe-Ag/f-MWCNT/PES nanostructured-hybrid membranes for removal of Cr(VI) from water

AU - Masheane, Monaheng L.

AU - Nthunya, Lebea N.

AU - Malinga, Soraya P.

AU - Nxumalo, Edward N.

AU - Mamba, Bhekie B.

AU - Mhlanga, Sabelo D.

PY - 2017

Y1 - 2017

N2 - This work describes the synthesis of Fe-Ag/functionalized-multiwalled carbon nanotube (f-MWCNT)/polyethersulphone (PES) nanostructured-hybrid membranes via a modified phase inversion method and its permeability properties. As-synthesized MWCNTs were first treated with acid and then Fe and Ag nanoparticles (Fe-Ag NPs) were uniformly dispersed on the surface of the f-MWCNTs using a microwave-assisted polyol method prior to addition to the PES polymer matrix. The addition of Fe-Ag/f-MWCNTs into the PES polymer increased the surface roughness of PES membranes and resulted to a higher hydrophilicity. Thermal stability and crystallinity properties of PES were significantly improved. The Fe-Ag/f-MWCNTs enhanced the surface charge density of the PES membranes and were found not to leach from PES. Performance evaluation studies revealed that the addition of Fe-Ag/f-MWCNTs into the PES polymer matrix increased water flux from 26.5 to 36.9 L/m2 h and improved the rejection of Cr6+ ions (up to 94%) in a cross-flow system. Furthermore, the addition of Fe-Ag/f-MWCNTs improved fouling resistance of PES membranes. The improved properties of these hybrid membranes make the ideal for use as either point-of-use or end-of-use water purification system for production of potable water.

AB - This work describes the synthesis of Fe-Ag/functionalized-multiwalled carbon nanotube (f-MWCNT)/polyethersulphone (PES) nanostructured-hybrid membranes via a modified phase inversion method and its permeability properties. As-synthesized MWCNTs were first treated with acid and then Fe and Ag nanoparticles (Fe-Ag NPs) were uniformly dispersed on the surface of the f-MWCNTs using a microwave-assisted polyol method prior to addition to the PES polymer matrix. The addition of Fe-Ag/f-MWCNTs into the PES polymer increased the surface roughness of PES membranes and resulted to a higher hydrophilicity. Thermal stability and crystallinity properties of PES were significantly improved. The Fe-Ag/f-MWCNTs enhanced the surface charge density of the PES membranes and were found not to leach from PES. Performance evaluation studies revealed that the addition of Fe-Ag/f-MWCNTs into the PES polymer matrix increased water flux from 26.5 to 36.9 L/m2 h and improved the rejection of Cr6+ ions (up to 94%) in a cross-flow system. Furthermore, the addition of Fe-Ag/f-MWCNTs improved fouling resistance of PES membranes. The improved properties of these hybrid membranes make the ideal for use as either point-of-use or end-of-use water purification system for production of potable water.

KW - Hybrid membranes

KW - Multi-walled carbon nanotubes

KW - Nanoparticles

KW - Polyethersulfone

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SN - 1383-5866

VL - 184

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JO - Separation and Purification Technology

JF - Separation and Purification Technology

ER -

Synthesis of Fe-Ag/f-MWCNT/PES nanostructured-hybrid membranes for removal of Cr(VI) from water

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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