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Method for determining position of heavy metal pollution source of urban surface soil

A technology for heavy metals and pollution sources, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficulty in determining the location of heavy metal pollution sources, inaccurate display of geographic information systems, etc.

Active Publication Date: 2018-08-10
海南墣锦环境科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to achieve the above object, the present invention provides a method for determining the location of heavy metal pollution sources in urban surface soil, which solves the problems in the prior art that the location of heavy metal pollution sources is difficult to determine and the display of geographic information systems is inaccurate

Method used

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  • Method for determining position of heavy metal pollution source of urban surface soil
  • Method for determining position of heavy metal pollution source of urban surface soil
  • Method for determining position of heavy metal pollution source of urban surface soil

Examples

Experimental program
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Effect test

Embodiment 1

[0049] S1. Production of pollution element distribution:

[0050] A county has a population of 165,000 and belongs to small and medium-sized cities. The distribution map of the element arsenic (As) is drawn by matlab, such as figure 2 , where the triangle point represents the point whose concentration is lower than the background value, and the circle point represents the point whose concentration is greater than the background value;

[0051] S2. Make a one-dimensional vector equation to determine the scope of pollution sources:

[0052] Such as figure 2 As shown in the concentration comparison chart, it can be seen that the background value concentration of As is 5.4ug / g, select the background value point χ, χ is 4 in the figure, coordinates (5640, 7998), and then select the point 1 whose surrounding concentration is greater than the background value concentration Coordinates (4750, 7400), coordinates of point 2 (4780, 7631) and coordinates of point 3 (4930, 7250), make ...

Embodiment 2

[0066] S1. Production of pollution element distribution:

[0067] A city with a population of 7 million belongs to a megacity, and the distribution map of element zinc (Zn) is drawn by matlab, such as image 3 Shown:

[0068] S2. Make a one-dimensional vector equation to determine the scope of pollution sources:

[0069] Such as image 3 As shown in the concentration comparison chart, it can be seen that the background value of Zn is 32.86mg / kg, and three areas where heavy metals are independently distributed are selected. image 3 For the background value points in Zone 1, Zone 2, and Zone 3, select the points whose surrounding concentration is greater than the background value to make the unary regression equations for the three areas:

[0070] Block 1: y 1 =1.24x 1 +1800;

[0071] Block 2: y 2 =3.41x2 -20460;

[0072] Block 3: y 3 =-0.75x 3 +16875

[0073] Then the above equation is a one-dimensional vector equation of χ→Ω. Since the maximum concentration point i...

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Abstract

The invention discloses a method for determining a position of a heavy metal pollution source of urban surface soil, and relates to the technical field of metal pollution source positioning. The method for determining the position of the heavy metal pollution source of the urban surface soil comprises the following steps: supposing a model, establishing the model, manufacturing a pollution elementconcentration distribution diagram, defining relevant parameters, manufacturing one-dimensional vector equation, determining pollution source range, and estimating boundary range pollution range, thereby determining the position of the heavy metal pollution source of urban surface soil. The method for determining the position of the heavy metal pollution source of urban surface soil provided by the invention can shorten a heavy metal pollution source area to a smaller range, and finds the pollution source by randomly getting points.

Description

technical field [0001] The invention belongs to the technical field of locating metal pollution sources, and relates to a method for determining the location of heavy metal pollution sources in urban surface soil. Background technique [0002] From April 2005 to December 2013, the Ministry of Environmental Protection and the Ministry of Land and Resources conducted the first nationwide soil survey. The results showed that the national soil total point exceeding standard rate was 16.1%, of which slight pollution accounted for 11.2%, light pollution accounted for 2.3%, moderate pollution accounted for 1.5%, and severe pollution accounted for 1.1%. The content distribution of cadmium, mercury, arsenic, and lead four kinds of inorganic pollutants showed a trend of increasing gradually from northwest to southeast, and from northeast to southwest. The over-standard rates of cadmium, mercury, arsenic, copper, lead, chromium, zinc, and nickel were 7.0%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/2465G06F16/29
Inventor 冯宇希宋小毛蔡彤
Owner 海南墣锦环境科技股份有限公司
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