Abstract
Study was carried out for the removal of hazardous organic compound from aqueous solution by using water/perfluorodecalin loaded ozone two-phase system. p-Chloronitrobenzene was used as hazardous organics to examine the efficiency of the two-phase ozonation system. Effects of initial pH in water, stirring speed, initial molar ratio of O3/p-chloronitrobenzene (M), and free radical scavenger on the removal rate of p-chloronitrobenzene were investigated respectively. It was revealed that ozone had low decomposed rate coefficient k = 0.0035 min−1 and solubility of 61.94 mg/L at 25°C in perfluorocarbon. In contrast to pH 2.0, higher level of pH (8.0) in water increased the removal rate of p-chloronitrobenzene in water/perfluorocarbon two-phase ozonation system. Removal rate of p-chloronitrobenzene was increased with the elevation of initial M value in water/perfluorocarbon two-phase ozonation system. Stirring speed was needed to control with proper level of speed in water/perfluorocarbon two-phase system. Compared to the conventional gas/water ozonation system, NaHCO3 (20 mmol/L) had no obvious negative effect on the p-chloronitrobenzene degradation in water/perfluorocarbon ozonation system. Oxidation efficiency of ozonation in water/perfluorocarbon system was superior to that of in conventional gas/water system.
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This work was supported by the Major Project of the National Water Pollution Control (2008ZX07101-003-004), Key Laboratory of Integrated Regulation and Resource development on Shallow Lakes Open Fund of Hohai University (408127), Priority Academic Program Development of Jiangsu Higher Education Institutions.
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Li, S., Zhu, Y., Li, X. et al. Degradation p-Chloronitrobenzene in Ozone-loaded System with Perfluorodecalin Solvent. Bull Environ Contam Toxicol 87, 297–302 (2011). https://doi.org/10.1007/s00128-011-0352-6
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DOI: https://doi.org/10.1007/s00128-011-0352-6