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Method and device for evaluating comprehensive pollution risk of solid waste to soil

A soil pollution and soil technology, applied in the field of soil environmental pollution evaluation, can solve the problems of lack of evaluation indicators and methods, and only consider the active metal state, etc.

Pending Publication Date: 2021-12-03
NORTH CHINA ELECTRICAL POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing evaluation methods or indicators of element content in various soils are only for the current pollution risk evaluation of the elements in the polluted soil, which is a kind of lag evaluation, but the solid waste or other sources that cause the pollution in the future There is a lack of evaluation indicators and methods for the potential risks before causing soil pollution
At the same time, the existing evaluation indicators and methods also separate the total amount of elements and the occurrence forms of elements. For example, the Muller index, the potential ecological hazard index method RI, and the Nemerow index only consider the total element content, while the risk assessment code RAC, secondary phase and primary comparison method RSP only consider the active metal state

Method used

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  • Method and device for evaluating comprehensive pollution risk of solid waste to soil
  • Method and device for evaluating comprehensive pollution risk of solid waste to soil
  • Method and device for evaluating comprehensive pollution risk of solid waste to soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This embodiment provides a method for evaluating the risk of comprehensive soil pollution caused by solid waste, which includes the following steps:

[0067] Step 1, obtaining background concentration measured values ​​and risk control values ​​of various solid waste elements (Cd, Cr, Pb, As, Hg, Cu, Ni and Zn) in the soil;

[0068] Step 2: Obtain the measured values ​​of the respective total contents of various solid waste elements, and combine their risk control values ​​to calculate the exceeding multiple Ei of a single element in solid waste; the calculation formula is as follows:

[0069]

[0070] Among them, Ei represents the exceeding multiple of a single element in solid waste, dimensionless; Ci represents the measured value of the total content of a single element in solid waste, in mg / kg; Ri represents the risk control value of a single element in solid waste, in units of mg / kg.

[0071] Step 3: Obtain the measured values ​​of the content of various solid ...

Embodiment 2

[0088] This embodiment provides a specific application based on the evaluation method in Embodiment 1. Taking coal-fired solid waste fly ash and desulfurized gypsum produced by coal-fired power plants as an example, evaluate the environmental risks to the local agricultural land where the coal-fired power plant is located. According to the evaluation method in Example 1, the different endowments of solid waste and local soil are measured The actual measured content value and background concentration value of each element type in the storage form, and the soil risk control value is obtained based on the records of the standard GB 15618-2018. As shown in Table 1, Table 1 shows the content (mg / kg) of each polluting element in solid waste and background soil.

[0089] Table 1:

[0090]

[0091] The results of the indices of Ei, Mi and Zi and the comprehensive pollution risk evaluation index Z calculated based on Table 1 are shown in Table 2 below.

[0092] Table 2:

[0093] ...

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Abstract

The invention provides a method and device for evaluating the comprehensive pollution risk of solid waste to soil. The method comprises the following steps: acquiring background concentration measured values and risk control values of various solid waste elements in soil; obtaining the standard exceeding multiple of a single element in the solid waste; obtaining a migration risk index of a single element in the solid waste; obtaining a risk index of single element in the solid waste to soil pollution; obtaining a risk evaluation index Z value of the solid waste to the soil comprehensive pollution; evaluating the comprehensive pollution risk of the solid waste to the soil based on the Z value: when the Z value is less than 1, the solid waste does not cause the pollution risk to the stacked soil, and the lower the Z value is, the lower the environmental risk of the solid waste is; when the Z value is greater than 1, taking that the solid waste can cause a pollution risk to the stacked soil, where the higher the Z value is, the higher the environmental risk of the solid waste is. According to the method, the standard exceeding multiple and the migration risk index are integrated to obtain the comprehensive evaluation index of the soil pollution risk, meanwhile, the occurrence form factor is considered, and accurate evaluation of the soil solid waste pollution risk can be achieved.

Description

technical field [0001] The invention belongs to the technical field of soil environmental pollution evaluation, and relates to a method and a device for evaluating the comprehensive soil pollution risk caused by solid waste. Background technique [0002] Solid waste contains a large amount of harmful elements, which will pose a risk of pollution to the natural environment such as soil and groundwater. my country's current agricultural land soil standard GB 15618-2018 "Soil Environmental Quality Agricultural Land Soil Pollution Risk Management and Control Standards" carried out risk analysis on the content of 8 elements (arsenic, cadmium, mercury, lead, chromium, copper, nickel, zinc) in the soil. Specification of filter values. my country's current soil standard for construction land GB 36600-2018 "Soil Environmental Quality Construction Land Soil Pollution Risk Control Standard" has carried out risk screening values ​​for the contents of 7 elements (arsenic, cadmium, mercur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0635G06Q50/26
Inventor 姜龙赵振宁杜磊刘高军
Owner NORTH CHINA ELECTRICAL POWER RES INST
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