| Autor: |
Feng, Xiang Hua, Zhou, Jun, Ding, Shi Min |
| Zdroj: |
Advanced Materials Research; July 2012, Vol. 550 Issue: 1 p2412-2415, 4p |
| Abstrakt: |
Photodegradation of dimethyl phthalate (DMP) in aqueous solutions by Fe(III)/oxalate/H2O2 system was investigated using daylight lamps as main light source. The UV-Vis spectra of the system and the concentration of •OH generated during irradiation were detected. The influences such as light sources, initial pH value, initial concentration of reactants on photodegradation efficiency of DMP were discussed. This system has advantage in appling visible light to produce •OH. DMP degradation efficiency principally depend on the concentration of •OH produced from photochemical process of the system. Several light sources including daylight lamps, metal halide lamps, UV disinfecting lamp and sunlight can all be as the light sources to achieve DMP degradation. DMP degradation efficiency keeps on a high level over the range of pH 3.0 to 5.0 and the optimum pH is 3.0. The degradation rate of DMP increases with increase of the initial concentrations of Fe(III) and H2O2, whereas decreases with increase of the initial concentrations of oxalate. |
| Databáze: |
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