Assessing synergistic ultrafiltration membrane fouling by TiO2 nanoparticles and humic acid using interaction energy analysis

• Autorzy: Tian L. , Sun Ch. , Sun F. , Zong R. , Liang S.
• Języki publikacji: EN

Abstrakty

EN

This research attempts to elucidate the effect of humic acid (HA) on TiO₂ nanoparticle ultrafiltration (UF) membrane fouling, and quantitatively analyze the synergistic membrane fouling mechanisms using interaction energies. The extended Derjaguin-Landau-Verwey-Overbeek (xDLVO) theory was employed to analyze the interaction energies and predict UF membrane fouling. Membrane fouling effects were studied during the dead-end filtration of individual TiO₂ and HA-TiO₂ mixtures using two kinds of polymeric UF membranes. It was found that HA-TiO₂ mixtures lead to greater flux declines than individual TiO₂ . For specific foulant, the hydrophobic PVDF membrane showed relative severe membrane fouling than hydrophilic PES membrane. As for the HA-TiO₂ mixture, much higher irreversible fouling was observed compared with that of individual TiO₂ . Moreover, this study highlights the importance of HA concentration in synergistic fouling effects of the HA-TiO₂ mixture. The increase of HA concentration caused an increase of contact angle and lower interaction energy, thus aggravating membrane fouling. Results illustrated that synergistic membrane fouling by TiO₂ and HA could be successfully explained using the xDLVO analysis. The extent of membrane fouling turned out to be dominated by Lewis acid-base interaction.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2017
• Tom: 26
• Numer: 5
• Opis fizyczny: p.2259-2266,fig.,ref.

Twórcy

autor

Tian L.

• Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China

autor

Sun Ch.

• Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China

autor

Sun F.

• Shandong Daojian Environmental Protection Technology Co., Ltd. Jinan 250014, China

autor

Zong R.

• Department of Environmental Engineering, Texas A&M University, Kingsville 700 University Boulevard, Kingsville, TX 78363-8202, USA

autor

Liang S.

• Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China

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Identyfikatory

DOI

10.15244/pjoes/70227