| In the past few years, the widespread occurrence of sudden and unexpected contamination events put large numbers of the public in the danger of exposure to hazardous organic pollutants, which account for about 34% of the total involved pollutants. So, the rapid elimination of the impact and quantity of organic pollutants after explosion, leakage accidents has become an important research topic. Aromatics and chlorophenols were chosen as representative pollutants in this research. The retention-flotation/oxidation-adsorption processes for emergent organic contamination treatment and their influence factors were investigated in this paper, based on which a mobile instrument for emergent treatment was developed.Results indicated that the retention capacities of organobentonites (especially CTMA-bentonite) were much higher than that of natural bentonite towards the chosen organic compounds. The dissolved air flotation process effectively removed insoluble organic pollutants which had low relative density and high hydrophobicity. Organic pollutants could be effectively degraded in a short time by ozonation, Fenton or ferrate oxidation under normal conditions, the pH of wastewater. oxidant dosage, initial concentration of contaminant and chemical structure had high influence on the effectiveness of oxidation process. Granular activated carbon (GAC) was used as quick and efficient material in the removal of refractory organics like nitrobenzene, which had proved to be an effective complement of oxidation method.In the simulated treatment of organic pollution accident, the retention-flotation-oxidation process showed a high efficiency in the rapid elimination of organic compounds like o-xylene which had low relative density and high hydrophobicity. Meanwhile, the retention-oxidation-adsorption process showed a good performance in the removal of organic compounds like aniline and nitrobenzene which had a high water solubility and relative density. |
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