Ceramic membrane fouling during ultrafiltration of oil/water emulsions: Roles played by stabilization surfactants of oil droplets

Handle URI:
http://hdl.handle.net/10754/564139
Title:
Ceramic membrane fouling during ultrafiltration of oil/water emulsions: Roles played by stabilization surfactants of oil droplets
Authors:
Lu, Dongwei; Zhang, Tao; Ma, Jun
Abstract:
Oil/water (O/W) emulsion stabilized by surfactants is the part of oily wastewater that is most difficult to handle. Ceramic membrane ultrafiltration presently is an ideal process to treat O/W emulsions. However, little is known about the fouling mechanism of the ceramic membrane during O/W emulsion treatment. This paper investigated how stabilization surfactants of O/W emulsions influence the irreversible fouling of ceramic membranes during ultrafiltration. An unexpected phenomenon observed was that irreversible fouling was much less when the charge of the stabilization surfactant of O/W emulsions is opposite to the membrane. The less ceramic membrane fouling in this case was proposed to be due to a synergetic steric effect and demulsification effect which prevented the penetration of oil droplets into membrane pores and led to less pore blockage. This proposed mechanism was supported by cross section images of fouled and virgin ceramic membranes taken with scanning electron microscopy, regression results of classical fouling models, and analysis of organic components rejected by the membrane. Furthermore, this mechanism was also verified by the existence of a steric effect and demulsification effect. Our finding suggests that ceramic membrane oppositely charged to the stabilization surfactant should be applied in ultrafiltration of O/W emulsions to alleviate irreversible membrane fouling. It could be a useful rule for ceramic membrane ultrafiltration of oily wastewater. © 2015 American Chemical Society.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Water Desalination and Reuse Research Center
Publisher:
American Chemical Society (ACS)
Journal:
Environmental Science & Technology
Issue Date:
7-Apr-2015
DOI:
10.1021/es505572y
Type:
Article
ISSN:
0013936X
Sponsors:
The authors want to thank King Abdullah University of Science and Technology for providing internship support to D. Lu, Daqing Oilfield Company of China, for providing crude oil and diesel samples. This research is also partly support by Natural Science Foundation of China (No.51378141).
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLu, Dongweien
dc.contributor.authorZhang, Taoen
dc.contributor.authorMa, Junen
dc.date.accessioned2015-08-03T12:33:48Zen
dc.date.available2015-08-03T12:33:48Zen
dc.date.issued2015-04-07en
dc.identifier.issn0013936Xen
dc.identifier.doi10.1021/es505572yen
dc.identifier.urihttp://hdl.handle.net/10754/564139en
dc.description.abstractOil/water (O/W) emulsion stabilized by surfactants is the part of oily wastewater that is most difficult to handle. Ceramic membrane ultrafiltration presently is an ideal process to treat O/W emulsions. However, little is known about the fouling mechanism of the ceramic membrane during O/W emulsion treatment. This paper investigated how stabilization surfactants of O/W emulsions influence the irreversible fouling of ceramic membranes during ultrafiltration. An unexpected phenomenon observed was that irreversible fouling was much less when the charge of the stabilization surfactant of O/W emulsions is opposite to the membrane. The less ceramic membrane fouling in this case was proposed to be due to a synergetic steric effect and demulsification effect which prevented the penetration of oil droplets into membrane pores and led to less pore blockage. This proposed mechanism was supported by cross section images of fouled and virgin ceramic membranes taken with scanning electron microscopy, regression results of classical fouling models, and analysis of organic components rejected by the membrane. Furthermore, this mechanism was also verified by the existence of a steric effect and demulsification effect. Our finding suggests that ceramic membrane oppositely charged to the stabilization surfactant should be applied in ultrafiltration of O/W emulsions to alleviate irreversible membrane fouling. It could be a useful rule for ceramic membrane ultrafiltration of oily wastewater. © 2015 American Chemical Society.en
dc.description.sponsorshipThe authors want to thank King Abdullah University of Science and Technology for providing internship support to D. Lu, Daqing Oilfield Company of China, for providing crude oil and diesel samples. This research is also partly support by Natural Science Foundation of China (No.51378141).en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleCeramic membrane fouling during ultrafiltration of oil/water emulsions: Roles played by stabilization surfactants of oil dropletsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentWater Desalination and Reuse Research Centeren
dc.identifier.journalEnvironmental Science & Technologyen
dc.contributor.institutionState Key Laboratory of Urban Water Resource and Environment, Harbin Institute of TechnologyHarbin, Chinaen
kaust.authorZhang, Taoen
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