化学表面处理竹炭对水中Au（III）的吸附性能研究

摘要

Surface of ordinary bamboo-charcoal was pretreated with chemical methods, and the adsorption performance of the bamboo-charcoal for Au(III) was investigated. Results showed that the adsorption capacity of the modified bamboo-charcoal for Au(III) was elevated remarkably. The adsorption process was changed from the physical adsorption to the chemical adsorption. If the condition is properly controlled, The adsorption rate could reach more than 97%. Therefore, the bamboo-charcoal can effectively be used to recycle Au(III) in aqueous. Fourier transform infrared (FT-IR) spectrometer, element analysis demonstrated that the contents of O-containing groups and N-containing groups on the bamboo-charcoal surface were increased. The sorption mechanism showed that O-containing groups and N-containing groups on the bamboo-charcoal were combined with Au (III) to form coordination bond.%　　对普通竹炭进行了表面化恘处理，并研究了此竹炭对Au(III)的吸附性能。实验结果表明：改性后竹炭对Au(III)的吸附性能有明显的提高，且吸附过程从以物理吸附为主转化为以化恘吸附为主。如果条件控制得当，吸附率可达97%以上，说明处理后的竹炭可以有效回收水相中的Au(III)。红外图谱和元素分析对改性前后的竹炭表征的结果表明：含氧基团和含氮基团的含量有明显的增加，且含氧基与含氮基与Au(III)配位成键。