球形活性炭拥有优异的吸附效率且易于后续分离，但是由于广谱吸附性，其应用受到了一定的限制，而膜分离是一种优异的选择性分离方式，将球形活性炭的高效吸附性与膜分离技术的高效选择性相结合可以实现球形活性炭的更广泛的利用。利用聚乙烯醇缩丁醛（PVB）作为成膜物质包覆在活性炭球表面，利用葡聚糖与红曲红色素作为两种不同相对分子质量的吸附质模拟多糖脱色的过程，探究了不同相对分子质量与不同浓度的PVB对包膜球形活性炭在吸附过程中的影响，并通过吸附动力学与吸附等温线对其过程进行了分析。结果表明，在单组分吸附中，葡聚糖的吸附量最大下降达67.1%，而红曲红最小仅下降了14.8%；在双组分吸附过程中，两者的吸附选择性则最高上升了114.8%，说明包膜活性炭在选择性吸附方面取得了较大的改善。

Spherical activated carbon has high adsorption efficiency and can be separated from the solution easily，but due to its broadspectrum adsorption，the application has certain limitations.Membrane separation is an excellent selective separa tion method.Combining the high efficiency adsorption of spherical activated carbon with the high efficiency selectivity of membrane separation technology could realize the wider utilization of spherical activated carbon.The surface of spherical ac tivated carbons was coated with polyvinyl butyral（PVB） as film forming substance，and the process of decolorization of poly saccharides was simulated by using dextran and monascus red pigment as the adsorbent of two different relative molecular masses.The effects of PVB with different relative molecular masses and concentrations on the adsorption process of coated spherical activated carbon were investigated.Then，the process was analyzed by adsorption kinetics and equilibrium.In single component adsorption，the maximum amount of dextran adsorbed decreased by up to 67.1%，while the minimum amount of monascus red decreased by only 14.8%.In two component adsorption process，the adsorption selectivity of the two component increased by 114.8%，indicating that the coated activated carbon has achieved great improvement in selective adsorption.