Changes of absorption spectra, SUVA254, and color in treating landfill leachate using microwave-assisted persulfate oxidation

초록

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

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