Wibowo N, Setyadhi L, Wibowo D, Setiawan J, Ismadji S
Department of Chemical Engineering, Widya Mandala Surabaya Catholic University, Kalijudan 37, Surabaya 60114, Indonesia.
J Hazard Mater. 2007 Jul 19;146(1-2):237-42. doi: 10.1016/j.jhazmat.2006.12.011. Epub 2006 Dec 10.
The influence of surface chemistry and solution pH on the adsorption of benzene and toluene on activated carbon and its acid and heat treated forms were studied. A commercial coal-based activated carbon F-400 was chosen as carbon parent. The carbon samples were obtained by modification of F-400 by means of chemical treatment with HNO3 and thermal treatment under nitrogen flow. The treatment with nitric acid caused the introduction of a significant number of oxygenated acidic surface groups onto the carbon surface, while the heat treatment increases the basicity of carbon. The pore characteristics were not significantly changed after these modifications. The dispersive interactions are the most important factor in this adsorption process. Activated carbon with low oxygenated acidic surface groups (F-400Tox) has the best adsorption capacity.
研究了表面化学和溶液pH值对苯和甲苯在活性炭及其酸处理和热处理形式上吸附的影响。选用市售煤基活性炭F-400作为碳母体。通过用HNO₃进行化学处理和在氮气流下进行热处理对F-400进行改性，从而获得碳样品。用硝酸处理导致在碳表面引入大量含氧酸性表面基团，而热处理则增加了碳的碱性。这些改性后孔隙特征没有明显变化。色散相互作用是该吸附过程中最重要的因素。具有低含氧酸性表面基团的活性炭（F-400Tox）具有最佳吸附容量。
