土地生物处理有机污染物过程模拟研究

在物科平衡原理的基础上，应用一种新的理论－土壤颗粒内部屏理论，建立了定量描述土地生物处理有污染物过程的综合数学模型，数学模型为球体扩散模型，其中包括用线性吸附等温线表示的可逆吸附和解吸过程，用假一级反应动力学方程表示的不可逆土壤屏蔽反应过程，用Monod方程表示的生物解过程，数学模型采用有限差分法求解，用砂壤土进行实验，实验结果与模型计算结果基本拟合，表示模型基本可靠，利用数学模型，可以定量预测有机污染物在土壤系统中进行生物处理，以达到科学指导土地生物处理工程的目的。

Model development about organic contaminant biodegradation process in soil system

Based on the mass balance theory, along with the application of a new theory-organic contaminant sequestration inside soil particles, a mathematical model which can simulate organic contaminant biodegradation process in soil system was developed. In the spherical diffusion model, local sorption-desorption is described by a linear isotherm, irreversible sequestration by a pseudo-first order kinetics and biodegradation by Monod kinetics. Model results match successfully with experimental data of sandy loam. Model simulations can be performed to quantitatively predict the degradation behavior of organic contaminant in soil system.