沙质滩涂中反应性与非反应性污染物阻滞效应研究

Study on Retardarce Effects of Reactive and Non-reactive Contaminants in Sandy Beach

沙质滩涂受到石油污染后,滩涂-水系统中的石油污染物处在一个物理、化学、生物的相互联系和连续变化之中。为了定量地研究滩涂-水系统反应性石油污染物的动态变化规律,通过水动力弥散实验和一维对流、弥散模型确定了水分和溶质在滩涂-水系统的水-盐动力学参数和反应动力学参数。选择研究区代表性沙样S和Y进行试验,研究结果表明,对于沙质滩涂-水系统中的非反应性污染物,S沙样和Y沙样的渗透系数分别为1.95cm/min和0.76cm/min,弥散系数分别为0.156cm^2/min和0.463cm^2/min;对于沙质滩涂-水系统中的反应性污染物,S沙样和Y沙样的阻滞系数分别为2.55和2.30,分配系数分别为1.93cm^3/g和1.05cm^3/g。

The oil contaminants in sands-water system are in physical-chemical-biologic mutual connection and change when sandy beach is polluted by oil. In order to study quantificationally the dynamic changing law of reactive oil contaminants in sands-water system, the hydrodynamic parameters for water and salt movement and the reactive hydrodynamic parameters are measured through the hydrodynamic dispersion tests and the one dimensional convection and dispersion model. The hydraulic dispersion tests show that the seepapge coefficients of sand samples S and Y for the non-reactive contaminants are 1.95cm/min and 0.76cm/min respectively,and the dispersion coefficient are 0.156cm^2/min and 0,463cm^2/mim. The retardarce coefficients of sand samples S and Y for the reactive contaminants in the system are 2.55 and 2.30 respectively,and the distribution coefficients are 1.93cm^3/g and 1.05cm^3/g.