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The influence of physical–chemical treatment, e.g. ozonation (O), ultrasound (US) and mechanically dispersion, on the response of fresh water organisms, exemplified by Ceriodaphnia dubia toward multi-walled carbon nanotubes (MWCNT) was studied. Results indicated that physical–chemical treatment had pronounced effect on the stability and aggregation of carbon nanomaterials and thereby impact on C....
The stability of nanoparticles is closely related to the fate, transport, and bio-toxicity of nanomaterials in the aquatic environment. Surface treatments and the presence of natural organic matter (NOM) have significant impacts on the aggregation behavior of nanoparticles. The aggregation kinetics of oxidized single-walled carbon nanotubes (O-SWCNT) was investigated in the presence of humic acid...
A clean and simple wet chemical process using dilute aqueous ozone (O 3 ) solution with or without ultrasound (US) was used to functionalize single-walled carbon nanotubes (SWCNTs). Both O 3 and O 3 /US treatments greatly increased the stability of SWCNTs in water. Results of X-ray photoelectron spectroscopy (XPS) showed that the surface oxygen to carbon atomic ratio increased...
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