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The Simulation of Heavy Metal Contamination Transport in Soil Environmental System

Author: ZuoBangYu
Tutor: HuangHanMing
School: Guangxi Normal University
Course: System theory
Keywords: heavy metal soil environmental system transport simulation
CLC: X53
Type: Master's thesis
Year: 2009
Downloads: 185
Quote: 1
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Abstract


The environment connect closely with the process of people’s production and living and the situation of environment infects human’s health directly,hence, this question is raised concerns increasingly. We should pay most attention to the source of contamination and the process of contamination transport in environment, which could give us the scientific method to prevent and manage. The heavy metal contamination is toxic and endanger to people’s health, and its source and sink is soil, because of this two factors, this paper try to study the law of heavy metal contamination transport in soil and the factors which affect they transport in soil.The history and present situation of research on contamination transport in soil are presented in this paper firstly, and secondly the mechanism of heavy metal contamination transport in soil is analyzed, which mainly analyze the approach of heavy metal contamination to soil environment system, analyze the factors which affect heavy metal contamination transport in soil. Thirdly, the basic theory and mathematical model of solution transport in soil are discussed, including the basic theory and mathematical model of water transports in soil. This paper draws on the mechanism of heavy metal contamination transport in soil and the basic theory of solution transports in soil to try to establish the mathematical model of heavy metal contamination transport in soil, besides this, this paper also try to simulate one dimension and two dimension mathematical model. During the simulation, the parameters are changed to check how the parameters affect the process of transport.The results the simulation discoveries that the soil bulk density, soil moisture, soil-water distribution factor, convection velocity and dispersion velocity are affect the process of heavy metal contamination transport in soil to some extent. Especially, the soil-water distribution factor and convection velocity affect mostly. The bigger the soil-water distribution factor, the smaller distance the heavy metal transport in soil, vice versa. The bigger the convection velocity, the farther the heavy metal contamination transport in soil, vice versa. The different input of contamination to soil are also discussed in this paper, and the simulation result discovery that the sooner to find the source and take effect action, the less serious contamination to soil.According to the simulation result and synthetical analysis, if it takes place the heavy metal contamination in someplace, we could take some effectual action to reduce the contamination, and to prevent more contamination. The simulation result also gives us more scientific foundation to evaluate and decide.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Soil Contamination and Control
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