By a News Reporter-Staff News Editor at Physics Week -- Current study results on Fullerenes have been published. According to news reporting originating in Harbin, People's Republic of China, by VerticalNews journalists, research stated, "The environmental risks of antibiotics have attracted increasing research attention, but their environmental behaviors remain unclear. In this study, functionalized carbon nanotubes (CNTs), namely, hydroxylized (MH), carboxylized (MC), graphitized multi-walled CNTs (MG) and single-walled CNTs (SW) were used as adsorbents and ciprofloxacin (CIP) as an adsorbate to investigate the effect of pH and temperature on sorption and desorption processes."
The news reporters obtained a quote from the research from the Chinese Academy of Science, "Sorption isotherms of CIP were fitted well by Freundlich and Dubinin-Ashtakhov models. Highly nonlinear isotherms of CIP were observed, indicating the highly heterogeneous site energy distribution on CNTs. At all pHs, SW had the highest sorption for CIP due to its largest surface area among all CNTs. Sorption distinction between MH and MC was explained by pi-pi electron donor-acceptor interactions. For SW, CIP sorption was thermodynamically favorable and endothermic associated with an entropy driven process, while the reverse process occurred for MC and MG. The rearrangement of CNTs bundles/aggregates and covalent bond formation may be responsible for CIP desorption hysteresis on CNTs."
According to the news reporters, the research concluded: "Desorption of antibiotics from CNTs may lead to potential exposure, particularly under changing environmental conditions such as temperature and pH."
For more information on this research see: Adsorption of antibiotic ciprofloxacin on carbon nanotubes: pH dependence and thermodynamics. Chemosphere, 2014;95():150-155. Chemosphere can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Chemosphere - www.elsevier.com/wps/product/cws_home/362)
Our news correspondents report that additional information may be obtained by contacting H.B. Li, Chinese Academy Sci, Northeast Inst Geog & Agroecol, Natl Field Res Stn Agroecosyst Hailun, Harbin 150081, People's Republic of China. Additional authors for this research include D. Zhang, X.Z. Han and B.S. Xing.
Keywords for this news article include: Asia, Harbin, Physics, Fullerenes, Nanotechnology, Thermodynamics, Carbon Nanotubes, Emerging Technologies, People's Republic of China
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