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Author:

Liu, Yongwang (Liu, Yongwang.) | Li, Xing (Li, Xing.) | Yang, Yanling (Yang, Yanling.) (Scholars:杨艳玲) | Ye, Wanlu (Ye, Wanlu.) | Ren, Jiawei (Ren, Jiawei.) | Zhou, Zhiwei (Zhou, Zhiwei.) (Scholars:周志伟)

Indexed by:

Scopus SCIE

Abstract:

Effect of ionic strength and calcium ions addition on the molecular properties of humic acid (HA), as well as the HA rejection coefficient and fouling characteristics of ultrafiltration were investigated in this study. Experiments were performed with an immersed hollow-fiber polyvinyl chloride membrane at a laboratory scale. The results indicated that both ionic strength and calcium ions could effectively reduce zeta potential of the HA solution. Average size of HA was identical with various ionic strength (10, 20, and 40 mM) or low calcium ion concentration (0.5 mM), but a much larger HA size was obtained with higher calcium ion concentrations (1.0 mM or 2.0 mM) for the complexation interaction between HA molecules. The ionic strength significantly reduced the HA removal, and somewhat mitigated the membrane fouling for the reduction of electrostatic repulsive forces between HA molecules and the membrane surface. At a low calcium ion concentration, the surface complexation dominated the fouling behavior of the process, and led to an increase of cake fouling resistance. However, at higher calcium ion concentrations, the bulk complexation dominated the interaction fouling behavior of the process, leading to a reduction of both cake fouling and pore blocking for the larger size aggregations.

Keyword:

Humic acid Ionic strength Membrane fouling Calcium ions Ultrafiltration

Author Community:

  • [ 1 ] [Liu, Yongwang]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 2 ] [Li, Xing]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 3 ] [Yang, Yanling]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 4 ] [Ren, Jiawei]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 5 ] [Zhou, Zhiwei]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 6 ] [Ye, Wanlu]Beijing City Planning Tech Serv Ctr, Beijing 100045, Peoples R China

Reprint Author's Address:

  • [Li, Xing]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China

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Source :

DESALINATION AND WATER TREATMENT

ISSN: 1944-3994

Year: 2015

Issue: 11

Volume: 54

Page: 2976-2985

1 . 1 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:174

JCR Journal Grade:3

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 4

SCOPUS Cited Count: 5

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

Online/Total:1021/5358218
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