Direct-flow microfiltration of aquasols. II. On the role of colloidal natural organic matter

Haiou Huang, Charles R. O'Melia

Research output: Contribution to journalArticle

Abstract

Natural organic matter (NOM) has been considered a major contributor to the fouling of microfiltration (MF) and ultrafiltration (UF) membranes employed in water treatment. However, the fouling potential of NOM has often been assessed in terms of its size or chemical composition. The colloid's chemical properties have often been ignored. In this study, a chemical attachment-based (CAB) model established previously was used in conjunction with a variety of analytical techniques to investigate the existence of three major components of an aquatic NOM and their role in the fouling of a polyvinylidene fluoride MF membrane. The results suggest that colloidal NOM relevant to membrane fouling has a broader size distribution and variations in chemical properties than proposed previously. For the model aquatic NOM used in this research, fouling was primarily contributed by both non-humic and humic colloidal fractions. The non-humic colloids were larger in size and probably adhered to the membrane regardless of the solution chemistry, while humic colloids had variable size and stickiness depending on solution chemistry. The fouling caused by organic colloids was mostly hydraulically irreversible, as a consequence of favorable surface interactions. The CAB model provided a useful way to understand the role of organic colloids in membrane fouling.

Original languageEnglish (US)
Pages (from-to)903-913
Number of pages11
JournalJournal of Membrane Science
Volume325
Issue number2
DOIs
StatePublished - Dec 1 2008

Fingerprint

Microfiltration
fouling
Colloids
Fouling
Biological materials
colloids
Membranes
Membrane fouling
membranes
Chemical properties
chemical properties
attachment
Water Purification
Ultrafiltration
chemistry
Water treatment
water treatment
vinylidene
surface reactions
fluorides

Keywords

  • Chemical attachment
  • Colloidal natural organic matter
  • Membrane fouling
  • Microfiltration
  • Modeling

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science(all)
  • Biochemistry
  • Filtration and Separation

Cite this

Direct-flow microfiltration of aquasols. II. On the role of colloidal natural organic matter. / Huang, Haiou; O'Melia, Charles R.

In: Journal of Membrane Science, Vol. 325, No. 2, 01.12.2008, p. 903-913.

Research output: Contribution to journalArticle

Huang, Haiou ; O'Melia, Charles R. / Direct-flow microfiltration of aquasols. II. On the role of colloidal natural organic matter. In: Journal of Membrane Science. 2008 ; Vol. 325, No. 2. pp. 903-913.
@article{7b61e847e5674e90bc880ea5ab0b5599,
title = "Direct-flow microfiltration of aquasols. II. On the role of colloidal natural organic matter",
abstract = "Natural organic matter (NOM) has been considered a major contributor to the fouling of microfiltration (MF) and ultrafiltration (UF) membranes employed in water treatment. However, the fouling potential of NOM has often been assessed in terms of its size or chemical composition. The colloid's chemical properties have often been ignored. In this study, a chemical attachment-based (CAB) model established previously was used in conjunction with a variety of analytical techniques to investigate the existence of three major components of an aquatic NOM and their role in the fouling of a polyvinylidene fluoride MF membrane. The results suggest that colloidal NOM relevant to membrane fouling has a broader size distribution and variations in chemical properties than proposed previously. For the model aquatic NOM used in this research, fouling was primarily contributed by both non-humic and humic colloidal fractions. The non-humic colloids were larger in size and probably adhered to the membrane regardless of the solution chemistry, while humic colloids had variable size and stickiness depending on solution chemistry. The fouling caused by organic colloids was mostly hydraulically irreversible, as a consequence of favorable surface interactions. The CAB model provided a useful way to understand the role of organic colloids in membrane fouling.",
keywords = "Chemical attachment, Colloidal natural organic matter, Membrane fouling, Microfiltration, Modeling",
author = "Haiou Huang and O'Melia, {Charles R.}",
year = "2008",
month = "12",
day = "1",
doi = "10.1016/j.memsci.2008.09.007",
language = "English (US)",
volume = "325",
pages = "903--913",
journal = "Jornal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Direct-flow microfiltration of aquasols. II. On the role of colloidal natural organic matter

AU - Huang, Haiou

AU - O'Melia, Charles R.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Natural organic matter (NOM) has been considered a major contributor to the fouling of microfiltration (MF) and ultrafiltration (UF) membranes employed in water treatment. However, the fouling potential of NOM has often been assessed in terms of its size or chemical composition. The colloid's chemical properties have often been ignored. In this study, a chemical attachment-based (CAB) model established previously was used in conjunction with a variety of analytical techniques to investigate the existence of three major components of an aquatic NOM and their role in the fouling of a polyvinylidene fluoride MF membrane. The results suggest that colloidal NOM relevant to membrane fouling has a broader size distribution and variations in chemical properties than proposed previously. For the model aquatic NOM used in this research, fouling was primarily contributed by both non-humic and humic colloidal fractions. The non-humic colloids were larger in size and probably adhered to the membrane regardless of the solution chemistry, while humic colloids had variable size and stickiness depending on solution chemistry. The fouling caused by organic colloids was mostly hydraulically irreversible, as a consequence of favorable surface interactions. The CAB model provided a useful way to understand the role of organic colloids in membrane fouling.

AB - Natural organic matter (NOM) has been considered a major contributor to the fouling of microfiltration (MF) and ultrafiltration (UF) membranes employed in water treatment. However, the fouling potential of NOM has often been assessed in terms of its size or chemical composition. The colloid's chemical properties have often been ignored. In this study, a chemical attachment-based (CAB) model established previously was used in conjunction with a variety of analytical techniques to investigate the existence of three major components of an aquatic NOM and their role in the fouling of a polyvinylidene fluoride MF membrane. The results suggest that colloidal NOM relevant to membrane fouling has a broader size distribution and variations in chemical properties than proposed previously. For the model aquatic NOM used in this research, fouling was primarily contributed by both non-humic and humic colloidal fractions. The non-humic colloids were larger in size and probably adhered to the membrane regardless of the solution chemistry, while humic colloids had variable size and stickiness depending on solution chemistry. The fouling caused by organic colloids was mostly hydraulically irreversible, as a consequence of favorable surface interactions. The CAB model provided a useful way to understand the role of organic colloids in membrane fouling.

KW - Chemical attachment

KW - Colloidal natural organic matter

KW - Membrane fouling

KW - Microfiltration

KW - Modeling

UR - http://www.scopus.com/inward/record.url?scp=55549126785&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=55549126785&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2008.09.007

DO - 10.1016/j.memsci.2008.09.007

M3 - Article

AN - SCOPUS:55549126785

VL - 325

SP - 903

EP - 913

JO - Jornal of Membrane Science

JF - Jornal of Membrane Science

SN - 0376-7388

IS - 2

ER -