土壤污染的蒸汽剥离法处理

According to the experimental investigation on the removal of polycyclic aromatic hydrocarbons (PAH) from fine-grained soils by the use of the steam stripping process, a mathematical model describing the desorption of PAH from soil particles is proposed and the fundamental experimental data are obtained. The steam stripping process and the corresponding laboratorial plant with own intellectual property are developed. The adsorption/desorption velocity constants can be determined by several test runs on the laboratorial plant. A software used for the simulation of the desorption process of PAH from soil particles is prepared. By means of the computer simulation based on the experimental data obtained from the laboratorial plant, the optimal operation parameters for a pilotplant such as reaction temperature, suspension concentration and suspension flow rate can be determined. Using the present steam stripping process and laboratorial plant, the energy consumption for the removal of PAH from soils is only 1/3-1/5 of that of foreign plants. A patent for this laboratorial plant has been granted.

蒸汽剥离法是对经土壤洗涤后分离出的富含污染物的极细粘土颗粒中进一步分离挥发性污染物（包括低挥发性污染物）的有效方法。本项目将从解吸过程机理的基础实验研究入手，获得我国典型污染河床底泥PAH等污染物解吸基本实验数据和数学模型，降低治理成本，使这换繁＜际跄茉谖夜玫酵乒愫陀τ茫畈刮夜谖廴就寥来蠊婺Ｖ卫砑际醴矫娴目瞻住