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DBD regeneration of GAC loaded with acid orange 7
Author(s) -
Qu GuangZhou,
Li Jie,
Li GuoFeng,
Wu Yan,
Lu Na
Publication year - 2009
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.310
Subject(s) - adsorption , chemistry , activated carbon , microporous material , dielectric barrier discharge , aeration , chemical engineering , orange (colour) , volumetric flow rate , sewage , pulp and paper industry , methyl orange , filtration (mathematics) , environmental chemistry , environmental engineering , catalysis , organic chemistry , environmental science , electrode , photocatalysis , food science , statistics , quantum mechanics , mathematics , engineering , physics
Activated carbon (AC) has been widely used as adsorbent in various industrial applications, such as purification of water in sewage facilities and filtration of air in toxicity‐treating factories. However, after exhaustion, AC should be regenerated and reused because of the limited resources for AC production and additional secondary pollution of spent‐carbon dumped into water or soil. In this study, a process for regenerating AC based on high active species (O 3 , ·OH, HO 2 , O 2 , ·RO, etc.) generated by dielectric barrier discharge (DBD) oxidation was proposed. The regeneration of granular‐activated carbon (GAC) exhausted with azo dye acid orange 7 was investigated to assay this method. The influences of the parameters, such as treatment time, electric field and gas kind, on the readsorption rate were studied systematically. The results of structural properties of GAC analyses showed that the surface area, the micropore area, external surface area, micropore volume and total volume of GAC after three cycles DBD treatment decreased to different extent. The adsorption isotherms indicated that the regeneration efficiency was about 81% after three times DBD plasma regeneration cycles, which confirmed the reuse feasibility of the regenerated GAC. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.