Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 561-756, Republic of Korea.
J Hazard Mater. 2012 Feb 29;205-206:118-25. doi: 10.1016/j.jhazmat.2011.12.045. Epub 2011 Dec 23.
Reports on the development of polymer adsorbents for microwave-assisted desorption of nonpolar volatile organic compounds (VOCs) are rare. In this study, we synthesized macroporous polymeric adsorbents with hydrophilic methyl pyridinium units for microwave-assisted desorption of nonpolar VOCs. The benzene adsorption and desorption properties of the adsorbents were investigated under both dry and humid conditions. Under humid conditions, as the content of the hydrophilic methyl pyridinium units in the adsorbents increased from 0 to 20%, the adsorption capacity of benzene decreased from about 21 to 7 mg/g, while the desorption efficiency of benzene increased significantly from 48 to 87%. The maximum concentration of desorbate also increased significantly as the content of the hydrophilic units was increased under humid conditions. We attributed the enhanced desorption efficiency mainly to more adsorbed moisture, which indirectly allowed heating of the polymer adsorbents to higher temperatures upon irradiation with 600 W microwaves.
关于用于微波辅助解吸非极性挥发性有机化合物 (VOC) 的聚合物吸附剂的研究报告很少。在这项研究中，我们合成了具有亲水性甲基吡啶单元的大孔聚合物吸附剂，用于微波辅助解吸非极性 VOC。研究了吸附剂在干燥和潮湿条件下对苯的吸附和解吸性能。在潮湿条件下，随着吸附剂中亲水性甲基吡啶单元含量从 0 增加到 20%，苯的吸附容量从约 21 毫克/克下降到 7 毫克/克，而苯的解吸效率从 48%显著提高到 87%。在潮湿条件下，随着亲水性单元含量的增加，解吸产物的最大浓度也显著增加。我们认为解吸效率的提高主要归因于更多的吸附水，这使得在 600 W 微波辐射下聚合物吸附剂的间接加热温度可以更高。
