Abstract
This paper takes the propagation characteristics of heavy metals and the judgment of the location of pollution sources as the research objects, aiming to analyze the propagation characteristics of different heavy metals. Firstly, the Gaussian diffusion model is conducted to establish the propagation characteristics model of heavy metal pollutants in the atmosphere. Then, based on the law of conservation of mass and the law of two-dimensional diffusion, the two-dimensional diffusion model is adopted to establish the propagation characteristics model of heavy metals in soil moisture. According to these two models, the nonlinear differential equations are established respectively, revealing that the characteristics of the two propagation ways are related to space, time, diffusion coefficients, and other factors. Then, in the light of the propagation characteristics of different heavy metals, the least square method is applied to reduce the data calculation error and obtain the specific location of the pollution source. Finally, through establishing the three-dimensional diffusion model of heavy metal diffusion by introducing artificial control, speed and angle of prevailing wind direction, and other factors, the model is further optimized. The establishment of this model provides an important theoretical basis and guiding significance for the future study of heavy metal pollutants.
Highlights
Soil heavy metal pollution refers to the phenomenon of high heavy metal content caused by excessive deposition of trace metal elements in soil due to human activities
The focus of people's attention gradually moves to verify geological environment anomaly in urban soil as well as how to carry out urban environmental quality assessment and study the evolution model of urban geological environment under the influence of human activities by applying massive data obtained from verification [1]
Out of the current heavy metal pollution researches which mainly focus on analyzing the ways and sources of pollution, there are few researches target at analyzing the propagation characteristics of heavy metal pollution and determining the specific location of pollution sources at home and abroad
Summary
Soil heavy metal pollution refers to the phenomenon of high heavy metal content caused by excessive deposition of trace metal elements in soil due to human activities. The focus of people's attention gradually moves to verify geological environment anomaly in urban soil as well as how to carry out urban environmental quality assessment and study the evolution model of urban geological environment under the influence of human activities by applying massive data obtained from verification [1]. Aiming at the propagation characteristics of heavy metal pollutants and the location of pollution sources, the Gaussian smoke mass diffusion model is conducted in this paper to establish the propagation characteristics model of heavy metal pollutants under the action of the atmosphere and the propagation characteristics model under the action of soil moisture. Through establishing the threedimensional diffusion model of heavy metal diffusion by introducing artificial control, speed and angle of prevailing wind direction, and other factors, the model is further optimized and become more comprehensive and scientific
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