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Soil heavy metal pollution comprehensive evaluation method based on variable weight

A comprehensive evaluation, heavy metal technology, applied in the direction of instrument, data processing application, general water supply saving, etc., to achieve the effect of reasonable and reliable evaluation results, easy practical application, and rich detection methods and ideas

Pending Publication Date: 2020-10-16
YANCHENG INST OF TECH
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Problems solved by technology

[0004] In summary, a comprehensive, more applicable and more objective comprehensive evaluation method for soil environment polluted by heavy metals needs to be developed.

Method used

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  • Soil heavy metal pollution comprehensive evaluation method based on variable weight
  • Soil heavy metal pollution comprehensive evaluation method based on variable weight
  • Soil heavy metal pollution comprehensive evaluation method based on variable weight

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Embodiment 1

[0046] refer to figure 1 , based on variable weight soil heavy metal pollution comprehensive evaluation method, described comprehensive evaluation method comprises steps as follows:

[0047] S1: Select the national standard for soil, and select two water quality indicators, cadmium and mercury, for half of the two soil samples to participate in the evaluation. The original measurement value of the jth indicator of the i-th pollutant is C ij , the detection data is the cadmium metal content C 11 =0.4mg / Kg, C 21 =0.38mg / Kg, mercury metal content C 12 =0.53mg / Kg, C 22 =0.61mg / Kg;

[0048] S2: The original measured value C in step S1 ij Through the following formula to standardize the data to get P ij ;

[0049] P ij ==C ij / S j (1)

[0050] P 11 =1.33,P 21 =1.267,P 12 =1.06,P 22 =1.22

[0051] P ij is the pollution index of the j index of the i pollutant; C ij is the measured value of pollutants; S j is the soil environmental quality standard value of the jth...

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Abstract

The invention discloses a soil heavy metal pollution comprehensive evaluation method based on variable weight. The comprehensive evaluation method comprises the following steps of: selecting a soil national standard, and selecting p water quality indexes for m soil samples to participate in evaluation, wherein the original measurement value of a jth index of an ith pollutant is Cij; performing data standardization processing on the original measurement value Cij to obtain Pij; determining different decision risk values a to obtain an order weight Vj; calculating the pollution index of the jthindex of the ith pollutant under the corresponding order weight; and evaluating the soil pollution by calculating the improved Nemerow index Pi. According to the technical scheme, the order weight averaging method OWA is combined with the Nemerow index method, evaluation results under various scenes are provided by changing decision risks, and comprehensive analysis by a decision maker is facilitated.

Description

technical field [0001] The invention relates to the technical field of comprehensive evaluation of soil heavy metal pollution, in particular to a water quality evaluation method based on an improved Nemerow pollution index with variable weights. Background technique [0002] Soil heavy metal pollution assessment is an important content of environmental quality assessment. Existing evaluation methods mainly include: single factor index method, Nemerow index method, pollution load index method, land accumulation index method, potential ecological hazard index method, environmental risk index method, etc. Among them, the Neimei comprehensive pollution index method is widely used in soil evaluation, and its advantage is that the calculation is simple and the pollution degree can be directly expressed quantitatively. The disadvantage is its own "maximum value effect". The maximum value of an indicator variable in the method will greatly improve the entire evaluation result, thus...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0635G06Q10/06393G06Q50/26Y02A20/152
Inventor 周峰李娜吕慧华
Owner YANCHENG INST OF TECH
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