活性炭表面含氧官能团对水中卤乙酸吸附去除的影响

Effects of activated carbon surface chemistry and pore structure on adsorption of HAAs from water

为了改善极性、亲水性卤乙酸(HAAs)分子在非极性、疏水性活性炭上的吸附性能,利用N2等温吸附实验、X射线光电子能谱实验(XPS)、HAAs等温吸附实验等方法,对几种不同产地的活性炭孔隙结构、表面元素形态结构组成,以及HAAs吸附性能进行了研究,考察了活性炭孔结构及含氧官能团对HAAs吸附性能的影响.活性炭表面含氧官能团对HAAs的吸附性能影响显著,当活性炭表面含氧官能团组成较小时,其HAAs吸附能力较强.

To improve the adsorption performance of polar, hydrophilic haloacetic acids （HAAs） on nonpolar, hydrophobic activated carbon, the surface properties and HAAs adsorption ability of several activated carbons of different origins were characterized with N2 adsorption and X-ray photoelectron spectroscopy and HAAs isothermal adsorption experiments, and the relationship between the surface chemistry characteristics and the adsorption ability of HAAs onto activated carbon was investigated. It was found that the adsorption capacity was influenced by the properties and contents of the surface chemical group. The adsorption capacity was higher with a lower oxo-group content.