Flux and salt rejection enhancement of polyvinyl(alcohol) reverse osmosis membranes using nano-zeolite

Shaheen Fatima Anis, Raed Hashaikeh, Nidal Hilal

Research output: Contribution to journalArticle

Abstract

Zeolite based membranes have been extensively studied over the past decade for enhanced reverse osmosis (RO) performances. In this study, poly vinyl alcohol (PVA)-networked cellulose (NC) membranes incorporated with nano zeolite-Y were prepared through a facile slip casting approach using various nano zeolite-Y loadings from 0.05 to 1.0 wt%. The nano zeolite was prepared through a unique ball milling process. Membrane hydrophilicity was seen to increase with increase in zeolite loading, while improved tensile strength (8.7 MPa) and tensile modulus (67 MPa) were obtained on small zeolite additions of 0.05 wt%. No prominent peak shifts were observed in differential scanning calorimeter (DSC) testifying to the thermal stability of the membranes. Membranes were tested for RO using 25,000 mg/L NaCl solution. Optimum RO performance was achieved for 0.5 wt% nano zeolite registering a salt rejection (Rs) of 99.52% with a flux increase of 34.2% compared to the bare PVA-NC membranes. Thus, addition of nano-Y to the polymer matrix provides preferential water pathways which facilitate water flow through the membrane. In addition, the irregular crystal morphology of the nano-Y, the size exclusion principle and the ion exchange mechanism provided a high salt rejection for the PVA-NC-nano Y membranes.

Original languageEnglish (US)
Article number114104
JournalDesalination
Volume470
DOIs
StatePublished - Nov 15 2019

Fingerprint

Zeolites
Polyvinyl Alcohol
Osmosis membranes
Polyvinyl alcohols
Reverse osmosis
zeolite
alcohol
Salts
Fluxes
membrane
salt
Membranes
Cellulose
cellulose
Alcohols
reverse osmosis
Water
Hydrophilicity
Ball milling
Calorimeters

Keywords

  • Membranes
  • Nano zeolite-Y
  • Networked cellulose
  • Polyvinyl alcohol
  • Reverse osmosis

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

Cite this

Flux and salt rejection enhancement of polyvinyl(alcohol) reverse osmosis membranes using nano-zeolite. / Anis, Shaheen Fatima; Hashaikeh, Raed; Hilal, Nidal.

In: Desalination, Vol. 470, 114104, 15.11.2019.

Research output: Contribution to journalArticle

@article{8c41cfe168644120a1cdaa28e8f8eb6d,
title = "Flux and salt rejection enhancement of polyvinyl(alcohol) reverse osmosis membranes using nano-zeolite",
abstract = "Zeolite based membranes have been extensively studied over the past decade for enhanced reverse osmosis (RO) performances. In this study, poly vinyl alcohol (PVA)-networked cellulose (NC) membranes incorporated with nano zeolite-Y were prepared through a facile slip casting approach using various nano zeolite-Y loadings from 0.05 to 1.0 wt{\%}. The nano zeolite was prepared through a unique ball milling process. Membrane hydrophilicity was seen to increase with increase in zeolite loading, while improved tensile strength (8.7 MPa) and tensile modulus (67 MPa) were obtained on small zeolite additions of 0.05 wt{\%}. No prominent peak shifts were observed in differential scanning calorimeter (DSC) testifying to the thermal stability of the membranes. Membranes were tested for RO using 25,000 mg/L NaCl solution. Optimum RO performance was achieved for 0.5 wt{\%} nano zeolite registering a salt rejection (Rs) of 99.52{\%} with a flux increase of 34.2{\%} compared to the bare PVA-NC membranes. Thus, addition of nano-Y to the polymer matrix provides preferential water pathways which facilitate water flow through the membrane. In addition, the irregular crystal morphology of the nano-Y, the size exclusion principle and the ion exchange mechanism provided a high salt rejection for the PVA-NC-nano Y membranes.",
keywords = "Membranes, Nano zeolite-Y, Networked cellulose, Polyvinyl alcohol, Reverse osmosis",
author = "Anis, {Shaheen Fatima} and Raed Hashaikeh and Nidal Hilal",
year = "2019",
month = "11",
day = "15",
doi = "10.1016/j.desal.2019.114104",
language = "English (US)",
volume = "470",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",

}

TY - JOUR

T1 - Flux and salt rejection enhancement of polyvinyl(alcohol) reverse osmosis membranes using nano-zeolite

AU - Anis, Shaheen Fatima

AU - Hashaikeh, Raed

AU - Hilal, Nidal

PY - 2019/11/15

Y1 - 2019/11/15

N2 - Zeolite based membranes have been extensively studied over the past decade for enhanced reverse osmosis (RO) performances. In this study, poly vinyl alcohol (PVA)-networked cellulose (NC) membranes incorporated with nano zeolite-Y were prepared through a facile slip casting approach using various nano zeolite-Y loadings from 0.05 to 1.0 wt%. The nano zeolite was prepared through a unique ball milling process. Membrane hydrophilicity was seen to increase with increase in zeolite loading, while improved tensile strength (8.7 MPa) and tensile modulus (67 MPa) were obtained on small zeolite additions of 0.05 wt%. No prominent peak shifts were observed in differential scanning calorimeter (DSC) testifying to the thermal stability of the membranes. Membranes were tested for RO using 25,000 mg/L NaCl solution. Optimum RO performance was achieved for 0.5 wt% nano zeolite registering a salt rejection (Rs) of 99.52% with a flux increase of 34.2% compared to the bare PVA-NC membranes. Thus, addition of nano-Y to the polymer matrix provides preferential water pathways which facilitate water flow through the membrane. In addition, the irregular crystal morphology of the nano-Y, the size exclusion principle and the ion exchange mechanism provided a high salt rejection for the PVA-NC-nano Y membranes.

AB - Zeolite based membranes have been extensively studied over the past decade for enhanced reverse osmosis (RO) performances. In this study, poly vinyl alcohol (PVA)-networked cellulose (NC) membranes incorporated with nano zeolite-Y were prepared through a facile slip casting approach using various nano zeolite-Y loadings from 0.05 to 1.0 wt%. The nano zeolite was prepared through a unique ball milling process. Membrane hydrophilicity was seen to increase with increase in zeolite loading, while improved tensile strength (8.7 MPa) and tensile modulus (67 MPa) were obtained on small zeolite additions of 0.05 wt%. No prominent peak shifts were observed in differential scanning calorimeter (DSC) testifying to the thermal stability of the membranes. Membranes were tested for RO using 25,000 mg/L NaCl solution. Optimum RO performance was achieved for 0.5 wt% nano zeolite registering a salt rejection (Rs) of 99.52% with a flux increase of 34.2% compared to the bare PVA-NC membranes. Thus, addition of nano-Y to the polymer matrix provides preferential water pathways which facilitate water flow through the membrane. In addition, the irregular crystal morphology of the nano-Y, the size exclusion principle and the ion exchange mechanism provided a high salt rejection for the PVA-NC-nano Y membranes.

KW - Membranes

KW - Nano zeolite-Y

KW - Networked cellulose

KW - Polyvinyl alcohol

KW - Reverse osmosis

UR - http://www.scopus.com/inward/record.url?scp=85071509272&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071509272&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2019.114104

DO - 10.1016/j.desal.2019.114104

M3 - Article

AN - SCOPUS:85071509272

VL - 470

JO - Desalination

JF - Desalination

SN - 0011-9164

M1 - 114104

ER -