应用隔膜池及分形方法测算金黄杆菌在土壤中的有效扩散系数

CIESC Journal

应用隔膜池及分形方法测算金黄杆菌在土壤中的有效扩散系数

王卓先; 黄国强; 张瑞玲

天津大学化工学院

出版日期:2007-11-05 发布日期:2007-11-05

Study of effective diffusion coefficient of Chryseobacterium sp. in saturated soil using membrane cell and fractal dimension model

WANG Zhuoxian;HUANG Guoqiang;ZHANG Ruiling

Online:2007-11-05 Published:2007-11-05

摘要/Abstract

摘要： 细菌在土壤中的扩散过程在微生物修复中具有重要作用。本文针对地下水饱和土壤，提出了利用土壤膜隔膜池的扩散实验方法，建立了土壤膜池理论和分形理论测算细菌扩散系数的理论基础。通过KCl扩散实验标定了隔膜池常数 β_KCl＝1.45 cm^-2，对于大体积的细菌通过多孔土壤膜的有效扩散面积小于KCL的有效扩散面积，本文利用分形理论模型计算得到细菌扩散的膜池常数 β_bacteria=0.92 cm^-2。土壤的曲折因子根据分形模型计算得到， τ＝3.17。通过KCl和细菌的扩散实验，并利用分形理论模型，最终求得了细菌在土壤中的有效扩散系数为 D_bacteria,eff＝5.18×10-7 cm^2·s^-1。

Abstract:

Diffusion of microbe plays an important role in microbial restoration of soil and groundwater. For saturated soil, a membrane cell was designed to measure the effective diffusion coefficient.In this study,the theory of fractal dimension was also used to calculate the cell constant of bacteria and the tortuosity factor of soil membrane. In the experiment of KCl diffusion, cell constant of KCl was directly calculated.In the second experiment the model of fractal dimension was used and the cell constant of microbe diffusion was obtained.Using the model of fractal dimension, tortuosity factor was also deduced.The effective diffusion coefficient of bacteria was obtained.

王卓先; 黄国强; 张瑞玲.

应用隔膜池及分形方法测算金黄杆菌在土壤中的有效扩散系数

[J]. CIESC Journal.

WANG Zhuoxian;HUANG Guoqiang;ZHANG Ruiling.

Study of effective diffusion coefficient of Chryseobacterium sp. in saturated soil using membrane cell and fractal dimension model

[J]. .