Adsorption of Triclocarban on Pristine and Irradiated MWCNTs in Aqueous Solutions

Abstract

The adsorption of triclocarban was investigated on pristine and irradiated MWCNTs, at different temperatures, in aqueous synthetic samples at different pH values and for different concentrations of humic acid (HA) from natural organic matter. Commonly used models of the adsorption isotherms, Freundlich and Langmuir were selected to fit the experimental data. The effects of TCC concentration, of the temperature and of the concentration of humic acid from natural organic matter were tested to study the impact of the environmental conditions over the sorption process.

The Influence of the Chemical Composition of Natural Waters about the Triclocarban Sorption on Pristine and Irradiated MWCNTs

“…Separations 2023, 10, x FOR PEER REVIEW 12 of 15 A scheme of the proposed sorption mechanism is based on the predominant electrostatic interactions of π-π type between the aromatic nucleus of TCC and the surface of MWCNTs [40] and is presented in Figure 6. The literature shows that π-π interactions could occur between MWCNTS surfaces and molecules containing C=C double bonds and benzene rings and, therefore, π-π electrostatic interactions contribute to the adsorption of TCC on MWCNTs.…”

“…The hydrophobicity of TCC has an important role over its adsorption on activated charcoal. The adsorption capacity can also be improved due to the π-π electrostatic interactions between the MWCNTs surface and the aromatic nucleus of the TCC [40,41].…”

Effects of Ph, Temperature, Ionic Strength and Organic Matter on Triclocarban Solubility

“…The stock solutions were stored in the refrigerator at 2-6 °C for one week. The standard working solutions were daily prepared by dilution from the stock solution of 100 mg/L, with HPLC grade acetonitrile (Ion et al, 2019b). An external standard calibration method was used to quantify the TCC concentration.…”

An informative short-term study on the impacts of a triclocarban/weathered multi-walled carbon nanotube-adsorbed complex to benthic organisms

“…TCC and some organics (EPS as well as cellular transport proteins) are able to bind and form some complexes that affect the function of sludge microorganisms. This leads to some possible associations of TCC with other pollutants (Ion et al 2019;Wang et al 2023). It is also described that carbon nanotubes have applications in environmental remediation due to its excellent mechanical and chemical properties.…”

“…Furthermore, we tested weathered multi-walled carbon nanotubes (wMWC-NTs). The reason for this is that both substances occur in environmental compartments and have already been detected (Mueller and Nowack 2008;Petersen et al 2016;Ion et al 2019). This type of CNTs has been detected in a range of 0.001-0.8 ng/L in surface waters, whereas concentrations between 3.69 and 32.66 ng/L are described for wastewaters, but environmental concentrations of nanomaterials in general are widely unknown (Maurer-Jones et al 2013;Lawrence et al 2016).…”