作　　者： ; ; ; ;

机构地区： 仲恺农业工程学院化学化工学院

出　　处： 《功能材料》 2010年第1期47-50,54,共5页

摘　　要： 主要研究了苯并[a]芘在金属离子改性活性炭表面的脱附活化能,程序升温脱附实验测定了苯并[a]芘在Fe3+,Zn2+和Ag+等金属改性活性炭上的脱附活化能,并应用软硬酸碱理论分析和讨论了其脱附活化能的差异。结果表明,苯并[a]芘在改性活性炭上脱附活化能的顺序如下:Ag(Ⅰ)/AC>AC>Zn(Ⅱ)/AC>Fe(Ⅲ)/AC。和原始活性炭相比,Ag+增强了苯并[a]芘和活性炭表面间的结合力,Zn2+和Fe3+减弱了苯并[a]芘和活性炭表面间的结合力,并首次用软硬酸碱理论解释了试验结果。 This work is mainly concerned with the study of the effects of loading different metal ions onto activated carbon surfaces on the desorption activation energy of benzo[a]pyrene （B[a]P）. Temperature programmed desorption （TPD） experiments were conducted to measure the desorption activation energy,Ed,of B[a]P） on the activated carbons separately dopped with ions Fe3＋,Zn2＋ and Ag＋,and the effects of loading metal ions onto the activated carbons on the interaction between B[a]P the carbon surfaces were discussed. Results showed that the Ed of B[a]P on the activated carbons followed the order： Ag（Ⅰ）/ACACZn（Ⅱ）/ACFe（Ⅲ）/AC. In comparison with the unmodified activated carbon AC,the loading of Ag＋ onto the activated carbon surfaces enhanced the interaction between B[a]P and the surfaces,while the loading of Zn2＋ and Fe3＋ onto the activated carbon surfaces weakened the interaction between B[a]P and the surfaces so that the Ed of B[a]P on the surfaces became smaller to some extent. The results were discussed by HSAB.

关 键 词： 苯并 芘 活性炭 金属离子 脱附活化能 酸碱理论

领　　域： [理学] [理学]