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In relation to this article, we declare that there is no conflict of interest.
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Received September 20, 2016
Accepted April 10, 2017
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Changes of absorption spectra, SUVA254, and color in treating landfill leachate using microwave-assisted persulfate oxidation

Department of Environmental Engineering, College of Engineering, Kangwon National University, Chuncheon, Gangwon-do 24341, Korea
johnghwa@kangwon.ac.kr
Korean Journal of Chemical Engineering, July 2017, 34(7), 1980-1984(5), 10.1007/s11814-017-0104-3
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Abstract

We experimentally determined the effects of microwave-assisted persulfate oxidation (MAPO) on absorbance spectra, specific ultraviolet absorbance at a wavelength of 254 nm (SUVA254), and color in treating landfill leachate. The effects of treatment temperature (60≤T≤90 °C) and sodium persulfate (SPS) concentration (0.05≤[SPS]≤0.3M) were characterized. An absorbance band in the visible region disappeared after MAPO, but the absorbance in UV region remained. SUVA254 of treated leachate varied from 2.3 to 14.7 L/mg.m. Color number (CN) removal of 99% (CN=0.004 cm-1) was achieved within 30min with MAPO at 80 °C and [SPS =0.2M. As T and [SPS] increased, CN and total organic carbon decreased, but SUVA254 increased.

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