期刊
DYES AND PIGMENTS
卷 95, 期 3, 页码 689-694出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2012.07.001
关键词
Fixed bed; Adsorption; Reactive dye; Carbon aerogel; Pore parameters; Activation
资金
- NNSFC [50472029, 50632040]
- Scientific Foundation of Guangdong [2004A30404001]
- Scientific Foundation of GuangZhou City [2007Z2-D2041]
Controlled porosity carbon aerogels are prepared by a sol-gel polymerization method and the prepared materials are used as fixed bed adsorbents for dye removal. The influences of operating conditions and preparation factors on the adsorption of C. I. Reactive Red 2, as a model compound, from aqueous solution were investigated. Many column parameters were estimated at different stages and the Bed-Depth-Service-Time model was used to analyze the experimental data. The results showed that the adsorption bed capacity increased with increasing bed height, decreasing liquid flow rate and decreasing initial dye concentration. Moreover, the work indicated that the adsorption ability of the carbon aerogel could be controlled by adjusting the molar ratio of resorcinol to surfactant and carbonization conditions. In addition, the adsorption capacity could be improved when the carbon aerogel was activated by CO2. The reasons for the difference in adsorption ability could be related to the different pore structure characteristics of various samples. (C) 2012 Elsevier Ltd. All rights reserved.
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