Chen Ming, Cui Lei, Li Chunhui, Diao Guowang
College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People's Republic of China.
J Hazard Mater. 2009 Feb 15;162(1):23-8. doi: 10.1016/j.jhazmat.2008.05.006. Epub 2008 May 9.
The adsorption of nitrobenzene on active carbon was researched. The experimental results shown the adsorption of nitrobenzene on active carbon can be described by Freundlich's adsorption model. On the other hand, beta-cyclodextrin (beta-CD) and hydroxypropyl-beta-cyclodextrin (HP-beta-CD) can react with nitrobenzene to form inclusion complex, which will enhance the aqueous solubility of nitrobenzene. By using different concentrations of beta-CD and HP-beta-CD as extractants, nitrobenzene on active carbon has been desorbed statically. As a comparison, surfactant CTAB and SDS were also selected as extractants. The desorbing of mechanism has been discussed. The low concentration of NB was effectively condensed by enrichment of active carbon and desorption of HP-beta-CD. HP-beta-CD is regarded as a potential extractant to deal with soil, sediment or active carbon.
研究了硝基苯在活性炭上的吸附情况。实验结果表明，硝基苯在活性炭上的吸附可用弗罗因德利希吸附模型来描述。另一方面，β-环糊精（β-CD）和羟丙基-β-环糊精（HP-β-CD）能与硝基苯反应形成包合物，这将提高硝基苯的水溶性。使用不同浓度的β-CD和HP-β-CD作为萃取剂，对活性炭上的硝基苯进行了静态解吸。作为对比，还选择了表面活性剂CTAB和SDS作为萃取剂。探讨了解吸机理。低浓度的硝基苯通过活性炭的富集和HP-β-CD的解吸得到有效浓缩。HP-β-CD被认为是处理土壤、沉积物或活性炭的一种潜在萃取剂。
