为考察活性炭对水中甲硫醚的吸附特性,选用3种表面性质相差很大的粉末活性炭,并利用X射线能谱、Boehm滴定法测定分析活性炭颗粒的元素组成及表面官能团含量,结合其性能参数探讨了活性炭吸附甲硫醚的吸附机理.研究结果表明:粉末活性炭对水中甲硫醚的吸附速度较快,一般在30 min左右就可达到约80％的吸附容量；各种粉末活性炭对水中甲硫醚的吸附等温线均符合Langmuir和Freundlich吸附等温式,且不同种类的活性炭对甲硫醚的吸附能力差异很大；炭粒的氧元素及表面羧基等含氧酸性官能团的含量是影响其对甲硫醚吸附能力的主导因素,活性炭比表面积的影响相对较小；初步认为活性炭对甲硫醚的吸附机理主要是化学吸附和离子交换吸附作用,物理吸附作用贡献较小.%To investigate the adsorption characteristics of powdered activated carbons (PACs) to Dimethyl Sulfide, three PACs were selected for the investigation of the adsorption performance to dimethyl sulfide (DMS). The composition of the element and group of the carbons were determined using X-ray spectrosco-py and Boehm titrations, and the adsorption mechanism discussed in the meantime. The results showed that adsorption velocity of DMS is high and the system can reach semi-equilibrium after 30min adsorption time.adsorption isotherm for the three kinds of PAC fitts Langmuir and Freundlich model very well, and the adsorption capacity differs evidently, with main impact factors not the surface area but the content of oxygen and carboxyl group. The main adsorption mechanisms for PAC to absorb DMS are chemical adsorption and ion exchange adsorption, while physical adsorption has little significance.
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