Abstract
The degradation of methyl orange (MO) in aqueous solution by microwave irradiation in the presence of granular-active carbon (GAC) was investigated. It was found that a synergistic rather than an additive effect of microwave irradiation and GAC contributes to the high-degradation efficiency. The ultraviolet and visible spectrum (UV–vis), infrared spectroscopy (IR), and scanning electron microscopy (SEM) measurements were conducted to trace the MO degradation process. It was demonstrated that the decrease in performance of GAC after repetitive use is largely attributed to the adsorption of some intermediate products on the surface of GAC. The regeneration of the spent GAC under microwave radiation was also investigated. The results show that the activity of spent GAC can be effectively recovered by microwave radiation and 74.1 % of its initial activity remains after six reaction cycles.
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The work was supported by Shandong Provincial Natural Science Foundation, China (no. ZR2012EEM029).
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Xu, D., Cheng, F., Zhang, Y. et al. Degradation of Methyl Orange in Aqueous Solution by Microwave Irradiation in the Presence of Granular-Activated Carbon. Water Air Soil Pollut 225, 1983 (2014). https://doi.org/10.1007/s11270-014-1983-0
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DOI: https://doi.org/10.1007/s11270-014-1983-0