Groundwater pollution source strength evaluation method
A technology with strong pollution sources and evaluation methods, applied in the field of environmental assessment, can solve the problems of less research, less research on main control factors, lack of scientific basis, etc., and achieve scientific and reasonable effects of protection and management
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Embodiment 1
[0061] Taking a chromium slag chemical plant as the research object, the plant was built in the 1980s. Due to historical problems, there is a chromium slag pile in the factory area that is stacked in the open air without anti-seepage measures. Classification is carried out according to the antifouling performance of the vadose zone. The vadose zone is mainly composed of silty clay, with a thickness of 2m and a permeability coefficient <10-4cm / s. According to Table 2, the antifouling performance of the vadose zone is "medium", so the effect of the vadose zone is considered when evaluating the intensity of groundwater pollution sources .
[0062] According to the leachate monitoring results, Cr, Pb, Zn and Cu were selected as the main factors in the comprehensive evaluation of pollution factors. Consult the relevant literature, and use the Class I water quality in the groundwater quality standard as the standard to determine the order of toxicity, mobility, and degradability of...
Embodiment 2
[0068] Taking a rare earth mine development project as the research object, the dump site of this development project is the main source of groundwater pollution, and anti-seepage measures will be built for the dump site.
[0069] According to the hazard identification test results of waste rock, Cu, Cr, Cd, As, Pb and Hg were selected as the main factors in the comprehensive evaluation of pollution factors. Based on the standards of Hazardous Waste Identification Standard Leaching Toxicity Identification (GB5085.3-2007) and Integrated Sewage Discharge Standard (GB8978-1996), the order of toxicity, mobility and degradation of relevant pollutants is determined. Calculated a for Cu, Cr, Cd, As, Pb and Hg i The values are 0.15, 0.08, 0.2, 0.15, 0.10 and 0.32 respectively, and P′ 加权平均 =0.026326,P imax = 0.708 and P' 综 = 0.5.
[0070] Refer to Table 7 for the scores of indicators related to pollution sources. The calculated hazard B value of the pollution source is 5.585, an...
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