Sorption of Phenanthrene by Dissolved Organic Matters and their Complex with Iron Oxide Nanoparticles

Abstract:

The environmental behavior of polycyclic aromatic hydrocarbons (PAHs) has attracted great research attention. However, their sorption mechanisms in organo-mineral complexes are still not specific enough. Batch sorption experiments with humic acid (HA) were carried out with iron oxide and their complexes adsorption phenanthrene (PHE) to determine the adsorption characteristics and mechanisms in this study. These results showed that the weakly polar and aromatic fractions of DOM preferentially adsorbed on the surface of iron oxide minerals. The organic matter (OM) binding on the surface of iron oxide played an important role for the adsorption of PHE, where van der Waals interactions and hydrophobic bonding, with ligand exchange at an electrified interface being the dominant reaction of HA adsorption to mineral. The sorption of PHE on organo-mineral complexes was controlled by π-π interactions and hydrophobic interactions.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 489-494
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.489
• Online since: December 2014
• Authors: Chao Xian Wei, Ni Liang
• Keywords: Aromaticity, Organic Matter, Organo-Oxide Complexes, Polycyclic Aromatic Hydrocarbons (PAHs)

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