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Investigation on Typical Electrical Resistivity Model of Domestic Landfill-leachate Contaminated Soil

Author: MaZuoZuo
Tutor: GuoXiuJun
School: Ocean University of China
Course: Environmental Engineering
Keywords: Resistivity method Soil pollution Landfill leachate Resistivity model
CLC: X53
Type: Master's thesis
Year: 2010
Downloads: 93
Quote: 0
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Abstract

Solid waste landfill leakage pollution has become a widespread global environmental problems. The complex composition of leachate pollutants, BOD, COD, ammonia, metal ions, the solid particles are widespread. Most of the contaminants into the soil dissolved in the pore water, and the heavy metals insoluble in water and solid particles will constitute the part of the soil particles, resulting in contaminated soil conductivity enhancement. Based on this, a new type of multi-electrode resistivity imaging method in the past 10 years in the contaminated area distribution investigation and diffusion process monitoring has been applied and achieved good results. Results based on electrical measuring levels of pollutants strike has not been achieved on the one hand leachate contaminated soil follow the basic electrical equation is not established, on the other hand, the solution process is a typical multi-solution of the inverse problem solving, boundary conditions not clear. The paper attempts to by leachate contaminated soil resistivity testing laboratories, quantitative research of different factors on the contribution rate of the contaminated soil resistivity, soil resistivity levels of pollutants mathematical model to explore the content of the contaminated soil leachate test results based on resistivity strike. The thesis is divided into five chapters. The first chapter introduces the research status quo, research, technology roadmap and the innovative achievements. The second chapter introduces the principle of electrical method and its implementation for leachate contamination survey. By Chapter 120 of pollution and the uncontaminated soil resistivity test, study the different particle size ratio, the resistivity change of different initial moisture content of sand in the continuing pollution of landfill leachate characteristics; contaminated soil resistivity the test data, the Archie formula based on the analysis of contaminated soil resistivity changes controlling factors and try to create a mathematical model for the soil resistivity and the leachate content from the electrical resistivity change mechanism. Studies have shown that including soil and water are good conductivity water phase multi-component pollutants pollution conductivity enhancement, enhanced the amplitude and soil content of fine material and the initial moisture content. The content of fine material, the more power the smaller the change, the smaller the initial moisture content, the greater the magnitude of conductivity enhancement. Lead to pollution of the liquid hole resistivity lower saturation increases and the conductive blockade caused by suspended solids is a major factor caused by the change in resistivity of the soil. Leachate contaminated soil resistivity model to follow Archie formula, covering changes in factors Archie formula can be used for analysis of contaminated soil resistivity and pollutant content of the relationship, but the analysis process need to know the parameters and the original seepage of contaminated soil porosity, cementation factor The filtrate electrical characteristics. Chapter electrical process to a leachate pollution monitoring tests to validate the conclusions of the study of the Chapter. The same time to carry out the test of the two-dimensional and three-dimensional resistivity imaging method, the electrode probe method tested and seven positions point sampling test before and after the pollution of soil resistivity and leachate content in the process of Analog soil leachate pollution. Based on the experimental results of the two-dimensional, three-dimensional apparent resistivity profiles and the reconstruction slice reflect the ability of the contaminated areas, the applicability of the different methods of resistivity test results, based on electrical measuring the results of the feasibility of soil leachate content to strike. The results show that the test apparent resistivity profiles abnormal area and contaminated areas with the corresponding relations but not consistent, reconstruction slice enhanced abilities to describe the actual contaminated areas. The three resistivity test value test resistivity of the sample method is the most accurate value, electrical profiling method and electrode probe method test value can be converted by the correction formula for the sample method Test resistivity values. Calculated by the formula determined based on the measured contaminated soil resistivity and the third chapter of contaminated soil resistivity soil leachate content and sample test values ??similar papers to establish the life of landfill leachate contaminated soil resistivity formula has strong applicability. The fifth chapter gives the overall conclusions and further work. The paper studies the development of the contaminated soil resistivity theory laid the foundation for the realization of resistivity technology-based quantitative detection of underground pollution.

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