树脂对化工废水中有毒有机化合物的吸附作用机理与技术研究

ADSORPTION MECHANISM OF TOXIC ORGANIC COMPOUNDS IN CHEMICAL WASTEWATER BY POLYMERIC ADSORBENTS

超高交联吸附树脂对多种芳香有机化合物较高的吸附容量主要源于其密集的微孔和双峰孔分布.对大孔吸附树脂及超高交联吸附树脂采用不同极性功能基团进行化学修饰可以制得系列离子交换与吸附双重功能吸附树脂,该类树脂对亲水性有机污染物同时具有疏水、静电、络合等多重作用.丙烯酸酯类吸附树脂在吸附芳香磺酸盐时,树脂的骨架和功能基团对吸附过程都有重要的贡献.

Studies of authors on the adsorption and adsorption mechanisms of various organic compounds onto three types of polymeric adsorbents in aqueous solutions are reviewed. The investigations showed that the high adsorption capacity of the adsorbents to many organic compounds was ascribed not only to their high specific surface area but also their intensive micropore structure. The double-peak pore distribution mode, two-stage dynamic character and the formation mechanism of oxygen-containing groups on their surfaces are systematically studied. To bifunctional resin, the point of our study is on its industrial application. Macroporous resins and hypercrosslinked resins were modified with many different functional groups such as amidocyanogen, carboxyl, sulfonate etc., to elevate their adsorption capacities. Some proposed applications of these bifunctional resins in industrial wastewater are presented. The observation on the acrylic ester resin is still on a preliminary stage in terms of its adsorption mechanism and application to organic industrial wastewater. The investigations showed that the matrix of acrylic ester resin and functional groups on its surface played an important role on its adsorption mechanism.