Microwave-Assisted Decomposition of Landfill Leachate with Persulfate
Publication: Journal of Environmental Engineering
Volume 142, Issue 3
Abstract
This work determined the effect of a combination of microwave irradiation and sodium persulfate (, SPS) on the decomposition of landfill leachate. The effect of treatment temperature, (60–90°C), SPS concentration, [SPS], (0.05–0.30 M), and solution pH (3.0–8.4) were characterized. As increased from 60 to 90°C, the observed degradation rate constant of total organic carbon (TOC), , in landfill leachate increased from 0.0032 to . The value fitted the Arrhenius equation and yielded an apparent activation energy of . As [SPS] increased from 0.05 to 0.3 M, increased from 0.0075 to . It decreased as pH increased. Within the design boundaries, () significantly affected the TOC removal of landfill leachate but [SPS] did not (). The results demonstrate that microwave-assisted persulfate oxidation can adequately remove organics from landfill leachate.
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Acknowledgments
This research was supported by the Korea Ministry of Environment (MOE) as “Public Technology Program based on Environmental Policy” and by a 2014 research grant from Kangwon National University (No. 120141385).
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Published In
Journal of Environmental Engineering
Volume 142 • Issue 3 • March 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Feb 11, 2015
Accepted: Sep 30, 2015
Published online: Nov 25, 2015
Published in print: Mar 1, 2016
Discussion open until: Apr 25, 2016
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