Effect of natural aquatic colloids on Cu(II) and Pb(II) adsorption by Al2O3 nanoparticles

•Size fractionation and characterization of natural aquatic colloids.•Metal adsorption by Al2O3 NPs is pH-dependent due to its complexation with AlOH.•Colloidal organic matter significantly facilitated metal adsorption.•Aquatic colloids affected metal adsorption via changing surface properties of Al...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2013-06, Vol.225, p.464-473
Main Authors: Sun, Weiling, Yin, Kun, Yu, Xiangquan
Format: Article
Language:English
Subjects:
Adsorption
Aluminum oxide
Aluminum oxide nanoparticles
Aquatic colloids
Colloids
Composition effects
Cu(II)/Pb(II)
Dissolution
Nanoparticles
Rivers
Surface chemistry
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Summary:•Size fractionation and characterization of natural aquatic colloids.•Metal adsorption by Al2O3 NPs is pH-dependent due to its complexation with AlOH.•Colloidal organic matter significantly facilitated metal adsorption.•Aquatic colloids affected metal adsorption via changing surface properties of Al2O3. The effect of aquatic colloids on Cu(II) and Pb(II) adsorption by Al2O3 nanoparticles (NPs) was investigated, and particular attention was paid to the relationship between the composition of the colloids and metal adsorption by Al2O3 NPs. The water samples collected from the Wenyu River and the Yellow River were separated into four fractions (1–0.22μm, 0.22–0.006μm, 0.006–0.003μm,
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2013.04.010