科研之友
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摘要
Solar-UV/H(2)O(2) advanced oxidation for destruction of trace organics was investigated under a variety of operating conditions in homogeneous, laboratory scale batch reactor experiments. Fluorescein and p-cresol were selected as representative. targets in the experiments: Half times for degradation of p-cresol ranged between 500 min with 2 mM H(2)O(2), and 20 min with 50 mM H(2)O(2) dining high solar irradiance experiments (around. noon On July 15th). A kinetic Model, previously developed for monochromatic light, was adapted for use With solar irradiance, using (i) calculated ground level solar spectral irradiance for the date and time of the experiments and (ii) wavelength-dependent light. attenuation in the reaction mixture. The model accurately represents experimental data without adjustable parameters. Model output included the time-dependent pH arising from complete mineralization Of the targets. Observed radical scavenging, effects Were Coil:eddy predicted by the kinetic model. Contaminant transformation was also Measured M a Municipal secondary wastewater effluent matrix. Here, 2-D fluorescence spectroscopy was used as a measure of the time dependent bulk organic characteristics in treated wastewater. Results indicated that solar-UV/H(2)O(2) advanced, oxidation is Capable of eliminating or drastically reducing the concentrations Of organic constituents that remain in. conventionally treated Municipal wastewater effluent.
- 出版日期2011-11-16
