Environmental Science Research Institute, Huazhong University of Science and Technology, Wuhan, PR China.
Bioresour Technol. 2010 Oct;101(19):7661-4. doi: 10.1016/j.biortech.2010.04.046. Epub 2010 May 8.
This study described the adsorption of chloramphenicol (CAP) in wastewater on the renewable bioresource of bamboo charcoal (BC). Results showed that CAP adsorption on BC (Ln q(e)=1.272 Ln C(e)+1.971) and H(2)SO(4) modified BC (Ln q(e)=1.851 Ln C(e)+0.659) were very slight, and on NaOH modified BC was significantly increased (Ln q(e)=0.344 Ln C(e)+6.490). The adsorbents were characterized by N(2) adsorption-desorption, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). It is revealed that BC and modified BC had very small surface areas of less than 1 m(2) g(-1), H(2)SO(4) treatment led to minimal variation in surface functional groups, and NaOH treatment increased the percentage of surface graphitic carbon and other oxygen-containing groups. The increased adsorption of CAP on NaOH modified BC was mainly ascribed to the enhancement of the pi-pi interaction between the adsorbent and adsorbate.
本研究描述了竹炭（BC）这种可再生生物资源对废水中氯霉素（CAP）的吸附作用。结果表明，CAP 在 BC（Ln q(e)=1.272 Ln C(e)+1.971）和 H(2)SO(4)修饰的 BC（Ln q(e)=1.851 Ln C(e)+0.659）上的吸附作用非常微弱，而在 NaOH 修饰的 BC 上的吸附作用显著增强（Ln q(e)=0.344 Ln C(e)+6.490）。采用 N(2)吸附-解吸、X 射线衍射（XRD）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）对吸附剂进行了表征。结果表明，BC 和修饰后的 BC 的比表面积均非常小，不到 1 m(2) g(-1)，H(2)SO(4)处理导致表面官能团的变化很小，而 NaOH 处理增加了表面石墨碳和其他含氧基团的比例。NaOH 修饰的 BC 对 CAP 的吸附增强主要归因于吸附剂和吸附质之间的 pi-pi 相互作用增强。
