Sorption of phenanthrene by nanosized alumina coated with sequentially extracted humic acids.

Environmental Science and Pollution Research International
Kun YangBaoshan Xing


Sorption of hydrophobic organic compounds (HOCs) to natural organic matter (NOM) is an important process that affects the transport, transformation, bioavailability, and fate of HOCs in the environment. Manufactured nanoparticles (NPs) such as nano-oxides will inevitably enter the environment in the processes of their production, transfer, and use and could be coated by the ubiquitous NOM. Thus, sorption of HOCs to NOM in the environment could be affected by the NP interactions with NOM. Furthermore, the toxicity of nano-oxides could be increased due to the adsorbed HOCs. Therefore, sorption of phenanthrene by nano-Al(2)O(3) coated with humic acid (HA) was examined in this study to explore the possible effect of nanoparticles (NPs) on the environmental behavior of HOCs and the potential environmental and health risks of NPs. Four HAs were sequentially extracted with 0.1 mol/L NaOH from a peat soil. HAs, nano-Al(2)O(3), and HA-coated nano-Al(2)O(3) were characterized by techniques such as elemental analysis, solid-state (13)C NMR, N(2) surface area analysis, and zeta potential measurement. Adsorption isotherms of HAs by nano-Al(2)O(3) and phenanthrene by HAs and HA-coated nano-Al(2)O(3) were obtained using a batch equilibration ...Continue Reading


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