Colloidal stability of Fe3O4 magnetic nanoparticles differentially impacted by dissolved organic matter and cations in synthetic and naturally-occurred environmental waters.
作者： Hao Wang , Xiaoli Zhao , Xuejiao Han , Zhi Tang , Fanhao Song
DOI: 10.1016/J.ENVPOL.2018.06.029
关键词:
摘要: Abstract Better understanding of the colloidal behaviors nanomaterials impacted by aquatic chemistry parameters is needed for appropriate evaluation environmental risks posed in natural waters. In study, stability Fe3O4 magnetic nanoparticles (Fe-MNPs) was evaluated over a range characteristics [e.g., pH, dissolved organic matter (DOM), salt types, cationic strength] six synthetic water samples. The findings from samples were further examined with eight “real world” Our results demonstrated that DOM fraction, humic acid (HA), promoted suspension Fe-MNPs more hydrophobic interactions addition to ligand exchange and electrostatic effects compared fulvic (FA). Capability cations increase aggregation order Ca2+ > Mg2+ >> Na+ because their different degrees bridging complexation molecules on particle surfaces. As key parameter indicating stability, Zeta (ζ) potentials these waters well correlated (R2 = 0.880, P
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