摘要
采用浓硝酸对活性炭进行表面氧化处理,将得到的样品分别浸渍在银氨、硫酸铜及咪唑溶液中进一步改性,然后采用Boehm滴定法对改性活性炭表面酸性基团的含量进行测定,研究改性对活性炭吸附性能的影响。结果表明:通过上述改性,活性炭表面酸性基团发生了显著变化,特别是羧基含量增加较多,从而活性炭的吸附性能发生了相应的变化。
The surface of activated carbon was modified by HNO3 oxidation and then the samples were dipped in the solution of Ag（NH3）2OH, CuSO4 and imidazole respectively. Then used Boehm titration to measure the contents of acidic reactive groups on the surface of modified activated carbon. The results showed that the contents of acidic reactive groups on the surface of activated carbon changed evidently, especially the content of carboxyl, and then the adsorption properties of activated carbon changed according.
关键词
活性炭
氧化
官能团
吸附性能
activated carbon
surface modification
acidic reactive groups
adsorption properties
