中文摘要：

选用了3种比表面积不同的粘胶基活性炭纤维（ACF-1、ACF-2和ACF-3）,并对样品ACF-1进行了浓硝酸和氨水活化处理,获得样品ACF-N和ACF-NH3,最后对这5种ACF样品进行表面特性表征和单质汞的吸附实验.氮分子吸附（77.4K）实验结果表明,ACF-N和ACF-NH3的微孔容积与ACF-1相比有所减小,各样品的微孔（d〈2nm）分布有一定差异.ACF含有许多不规则的表面微结构,其X射线光电子能谱（XPS）分析表明,ACF-N的含氧官能团（CO、COOH）和ACF-NH3的含氮官能团含量与ACF-1相比均有明显增加.X射线衍射（XRD）分析结果表明,ACF-2和ACF-3的石墨化程度和晶体化程度较ACF-1有所提高.汞吸附实验表明,由于受到ACF表面微结构的影响,微孔容积与吸附能力之间并非简单的依附关系,增加含氧、含氮基团含量在一定程度上能提高ACF的汞吸附容量.

英文摘要：

Three different specific surface area viscose-ACF （defined as ACF-1、ACF-2 and ACF-3） were chosen in the tests. The resulting materials ACF-N and ACF-NH3 were obtained after the sample ACF-1 was treated with HNO3 acid digestion and ammonia solution. Then the characterization of surface properties and Hg adsorption tests were conducted for these five kinds of ACFs. The nitrogen adsorption test at temperature 77.4K showed that micro-pore distribution （d〈2nm） of five samples existed differences. Micro-pore volume of ACF-N and ACF-NH3 samples were smaller than that of ACF-1. Surface micro-structure was analyzed by X-ray photoelectron spectroscopy （XPS）. The results showed that oxygen functional groups such as carbonyl and carboxyl in ACF-N and nitrogen-containing functional groups in ACF-NH3 are significantly more than that in ACF-1. Microcrystalline structure was analyzed by X-ray diffraction （XRD） technique. It was found that graphitization and crystal level of ACF-2 and ACF-3 also increased comparing with ACF-1. Mercury removal tests revealed that mercury adsorption capacity does not simply depend on micro-pore volume because of the effect of surface micro-structure. Increasing the content of oxygen and nitrogen-containing functional groups,to some extent,can enhance mercury removal performance of ACF.