Characterization and retention of UF membranes using PEG, HS and polyelectrolytes

Nidal Hilal, Mohammed Al-Abri, Hilal Al-Hinai

Research output: Contribution to journalArticle

Abstract

Molecular weight cut-off (MWCO) of two different types of membranes (polyether sulfone (PES) and regenerated cellulose (RC) ultrafiltration (UF) membranes) has been investigated using 2, 4 and 6 kDa polyethylene glycol (PEG) solutes. The retention results of humic acid (HA), fulvic acid (FA), copolymers of dimethyl aminoethyl acrylate (CoAA) and poly dially dimethylammonium chloride (PDADMAC) is also presented in this paper. Retention of PEG solutions produced MWCO lower than stated by the manufacturers. The MWCO of P005F, C005F and P020F was 3.75, 3.35 and 12.1 kDa, respectively. The manufacturer values were 5 kDa for P005F and C005F and 20 kDa for P020F. The rejection of PDADMAC and CoAA was found to be lower than expected with respect to the MW specified by the supplier. The MW of PDADMAC and CoAA is 60-200 kDa and 10-12 intrinsic viscosity, respectively. The retention of such high MW substances should be ≫90%, but the results show a maximum retention of 91% and the other results are <90%. Nevertheless, the retention of HA and FA was as expected. The humic substances (HA and FA) were extracted from soil, which has a low MW i.e. <6 kDa. The maximum rejection of HA and FA was ~93 and ~84%, respectively. The lower rejection of FA is attributed to the lower MW of FA compared to HA. The observed rejection of PDADMAC and CoAA decreases with increasing the pressure, but the real rejection is constant. This is attributed to the increase in concentration at the wall of the membrane, hence increasing the mass transfer coefficient. The same trend is achieved when filtering HA and FA. The rejection of P005F is always higher than the rejection of C005F for all substances. Although the manufacturer stated the same MWCO of both membranes, the P005F MWCO was higher than C005F producing a higher rejection.

Original languageEnglish (US)
Pages (from-to)568-578
Number of pages11
JournalDesalination
Volume206
Issue number1-3
DOIs
StatePublished - Feb 5 2007

Fingerprint

Humic Substances
Ultrafiltration
fulvic acid
ultrafiltration
Polyelectrolytes
Polyethylene glycols
humic acid
membrane
Membranes
Acids
Molecular weight
Copolymers
chloride
Polyethers
humic substance
Cellulose
cellulose
mass transfer
solute
Mass transfer

Keywords

  • Characterization
  • Dead end filtration
  • Humic substances
  • Polyelectrolytes
  • Ultrafiltration

ASJC Scopus subject areas

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

Cite this

Characterization and retention of UF membranes using PEG, HS and polyelectrolytes. / Hilal, Nidal; Al-Abri, Mohammed; Al-Hinai, Hilal.

In: Desalination, Vol. 206, No. 1-3, 05.02.2007, p. 568-578.

Research output: Contribution to journalArticle

Hilal, Nidal ; Al-Abri, Mohammed ; Al-Hinai, Hilal. / Characterization and retention of UF membranes using PEG, HS and polyelectrolytes. In: Desalination. 2007 ; Vol. 206, No. 1-3. pp. 568-578.
@article{7833d1b0135d4baf9b0bc2c359f183c2,
title = "Characterization and retention of UF membranes using PEG, HS and polyelectrolytes",
abstract = "Molecular weight cut-off (MWCO) of two different types of membranes (polyether sulfone (PES) and regenerated cellulose (RC) ultrafiltration (UF) membranes) has been investigated using 2, 4 and 6 kDa polyethylene glycol (PEG) solutes. The retention results of humic acid (HA), fulvic acid (FA), copolymers of dimethyl aminoethyl acrylate (CoAA) and poly dially dimethylammonium chloride (PDADMAC) is also presented in this paper. Retention of PEG solutions produced MWCO lower than stated by the manufacturers. The MWCO of P005F, C005F and P020F was 3.75, 3.35 and 12.1 kDa, respectively. The manufacturer values were 5 kDa for P005F and C005F and 20 kDa for P020F. The rejection of PDADMAC and CoAA was found to be lower than expected with respect to the MW specified by the supplier. The MW of PDADMAC and CoAA is 60-200 kDa and 10-12 intrinsic viscosity, respectively. The retention of such high MW substances should be ≫90{\%}, but the results show a maximum retention of 91{\%} and the other results are <90{\%}. Nevertheless, the retention of HA and FA was as expected. The humic substances (HA and FA) were extracted from soil, which has a low MW i.e. <6 kDa. The maximum rejection of HA and FA was ~93 and ~84{\%}, respectively. The lower rejection of FA is attributed to the lower MW of FA compared to HA. The observed rejection of PDADMAC and CoAA decreases with increasing the pressure, but the real rejection is constant. This is attributed to the increase in concentration at the wall of the membrane, hence increasing the mass transfer coefficient. The same trend is achieved when filtering HA and FA. The rejection of P005F is always higher than the rejection of C005F for all substances. Although the manufacturer stated the same MWCO of both membranes, the P005F MWCO was higher than C005F producing a higher rejection.",
keywords = "Characterization, Dead end filtration, Humic substances, Polyelectrolytes, Ultrafiltration",
author = "Nidal Hilal and Mohammed Al-Abri and Hilal Al-Hinai",
year = "2007",
month = "2",
day = "5",
doi = "10.1016/j.desal.2006.02.077",
language = "English (US)",
volume = "206",
pages = "568--578",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Characterization and retention of UF membranes using PEG, HS and polyelectrolytes

AU - Hilal, Nidal

AU - Al-Abri, Mohammed

AU - Al-Hinai, Hilal

PY - 2007/2/5

Y1 - 2007/2/5

N2 - Molecular weight cut-off (MWCO) of two different types of membranes (polyether sulfone (PES) and regenerated cellulose (RC) ultrafiltration (UF) membranes) has been investigated using 2, 4 and 6 kDa polyethylene glycol (PEG) solutes. The retention results of humic acid (HA), fulvic acid (FA), copolymers of dimethyl aminoethyl acrylate (CoAA) and poly dially dimethylammonium chloride (PDADMAC) is also presented in this paper. Retention of PEG solutions produced MWCO lower than stated by the manufacturers. The MWCO of P005F, C005F and P020F was 3.75, 3.35 and 12.1 kDa, respectively. The manufacturer values were 5 kDa for P005F and C005F and 20 kDa for P020F. The rejection of PDADMAC and CoAA was found to be lower than expected with respect to the MW specified by the supplier. The MW of PDADMAC and CoAA is 60-200 kDa and 10-12 intrinsic viscosity, respectively. The retention of such high MW substances should be ≫90%, but the results show a maximum retention of 91% and the other results are <90%. Nevertheless, the retention of HA and FA was as expected. The humic substances (HA and FA) were extracted from soil, which has a low MW i.e. <6 kDa. The maximum rejection of HA and FA was ~93 and ~84%, respectively. The lower rejection of FA is attributed to the lower MW of FA compared to HA. The observed rejection of PDADMAC and CoAA decreases with increasing the pressure, but the real rejection is constant. This is attributed to the increase in concentration at the wall of the membrane, hence increasing the mass transfer coefficient. The same trend is achieved when filtering HA and FA. The rejection of P005F is always higher than the rejection of C005F for all substances. Although the manufacturer stated the same MWCO of both membranes, the P005F MWCO was higher than C005F producing a higher rejection.

AB - Molecular weight cut-off (MWCO) of two different types of membranes (polyether sulfone (PES) and regenerated cellulose (RC) ultrafiltration (UF) membranes) has been investigated using 2, 4 and 6 kDa polyethylene glycol (PEG) solutes. The retention results of humic acid (HA), fulvic acid (FA), copolymers of dimethyl aminoethyl acrylate (CoAA) and poly dially dimethylammonium chloride (PDADMAC) is also presented in this paper. Retention of PEG solutions produced MWCO lower than stated by the manufacturers. The MWCO of P005F, C005F and P020F was 3.75, 3.35 and 12.1 kDa, respectively. The manufacturer values were 5 kDa for P005F and C005F and 20 kDa for P020F. The rejection of PDADMAC and CoAA was found to be lower than expected with respect to the MW specified by the supplier. The MW of PDADMAC and CoAA is 60-200 kDa and 10-12 intrinsic viscosity, respectively. The retention of such high MW substances should be ≫90%, but the results show a maximum retention of 91% and the other results are <90%. Nevertheless, the retention of HA and FA was as expected. The humic substances (HA and FA) were extracted from soil, which has a low MW i.e. <6 kDa. The maximum rejection of HA and FA was ~93 and ~84%, respectively. The lower rejection of FA is attributed to the lower MW of FA compared to HA. The observed rejection of PDADMAC and CoAA decreases with increasing the pressure, but the real rejection is constant. This is attributed to the increase in concentration at the wall of the membrane, hence increasing the mass transfer coefficient. The same trend is achieved when filtering HA and FA. The rejection of P005F is always higher than the rejection of C005F for all substances. Although the manufacturer stated the same MWCO of both membranes, the P005F MWCO was higher than C005F producing a higher rejection.

KW - Characterization

KW - Dead end filtration

KW - Humic substances

KW - Polyelectrolytes

KW - Ultrafiltration

UR - http://www.scopus.com/inward/record.url?scp=33846815254&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846815254&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2006.02.077

DO - 10.1016/j.desal.2006.02.077

M3 - Article

AN - SCOPUS:33846815254

VL - 206

SP - 568

EP - 578

JO - Desalination

JF - Desalination

SN - 0011-9164

IS - 1-3

ER -