Research on Transport and Transformation of Nitrobenzene in Songhua River and Calculation of Flux and Remnant Based on Mathematics Quantification Analysis

摘要

After the CNPC Jilin Petrochemical Company had the explosion accident in Nov. 13 2005, approximately 50 tons of nitrobenzene had precipitated into the Songhua River, severely polluted the water environment. How to eliminate the longterm environmental effect caused by nitrobenzene pollution has become an imminent problem. First, we proved that three selected cross section are all in a completely mixed state which was not affected by the neighborhood flow. On this condition, the research of the main flux of contaminants indicates that the nitrobenzene flux in all cross sections is less and less, but the attenuation trend is gradually slow down. From the residual remnant of nitrobenzene in different segments calculated according to related experimental data, we got a further hypothesis that parts of nitrobenzene remnant are transferred by the bottom sludge adsorption and resolution. At last, a general analysis model is set up from the one-dimensional counter-flow equation, atmospheric - water exchange process deposit - aqueous phase interaction and rivers turbulent mixing and dissemination function. The results of this mathematics quantification analysis have some differences with the real calculation, while the gross transformation trend is the same, indicating that analysis both are based on reality and have a comparatively veracious reflection about the transport and transformation of nitrobenzene.