1. Microwave-Assisted Decomposition of Landfill Leachate with Persulfate.
- Author
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Yong-Beom Kim and Johng-Hwa Ahn
- Subjects
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MICROWAVES , *LANDFILLS , *LEACHATE , *PERSULFATES , *CHEMICAL decomposition , *ACTIVATION energy - Abstract
This work determined the effect of a combination of microwave irradiation and sodium persulfate (Na2S2O8, SPS) on the decomposition of landfill leachate. The effect of treatment temperature, T(60-90°C), SPS concentration, [SPS], (0.05-0.30 M), and solution pH (3.0-8.4) were characterized. As T increased from 60 to 90°C, the observed degradation rate constant of total organic carbon (TOC), kobs, in landfill leachate increased from 0.0032 to 0.0704 min-1. The value kobs fitted the Arrhenius equation and yielded an apparent activation energy of 104 kJ=mol. As [SPS] increased from 0.05 to 0.3 M, kobs increased from 0.0075 to 0.0974 min-1. It decreased as pH increased. Within the design boundaries, T (p < 0.01) significantly affected the TOC removal of landfill leachate but [SPS] did not (p > 0.05). The results demonstrate that microwave-assisted persulfate oxidation can adequately remove organics from landfill leachate. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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