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A method for evaluate that environmental quality of heavy metals in sediment

A technology of environmental quality and evaluation method, applied in the field of environmental protection, can solve problems such as uncertainty of results

Active Publication Date: 2019-02-05
HOHAI UNIV
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Problems solved by technology

Uncertainty in data selection leads to uncertainty in results

Method used

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  • A method for evaluate that environmental quality of heavy metals in sediment
  • A method for evaluate that environmental quality of heavy metals in sediment
  • A method for evaluate that environmental quality of heavy metals in sediment

Examples

Experimental program
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Embodiment 1

[0185] Taking the sediments of a certain river in China as an example,

[0186] To evaluate the environmental quality of heavy metals in sediments, the steps are as follows:

[0187] 1. Collection and processing of basic sediment data

[0188] The river is divided into 10 sections, and the heavy metals in the sediments of each section of the river include chromium (C r ), copper (C u ), zinc (Z n ), cadmium (C d ), mercury (H g ), lead (P b ), the sediment data of the first section of the river are shown in Table 1;

[0189] Table 1 Sediment heavy metal data (unit: mg / kg)

[0190]

[0191] The sediment heavy metal data were processed with triangular fuzzy numbers, and the data are shown in Table 2;

[0192] Table 2 Sediment heavy metal data after triangular fuzzy number processing (unit: mg / kg)

[0193]

[0194] The data is further processed by α-cutting, and α is set to 0.9, and the data is shown in Table 3;

[0195] Table 3 α cut-off processing sediment heavy...

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Abstract

A method for evaluate environmental quality of heavy metals in sediment include collecting basic data of sediment, including regional geochemical background value of heavy metals in sediment and dataof physical and chemical property of sediment, specifically including content of heavy metals in sediment, content of alumina in sediment, content of organic matter in sediment and median grain size of sediment; The contents of heavy metals in sediments and the regional geochemical background values of heavy metals in sediments were treated by triangular fuzzy number and alpha-cut set. The enrichment index of heavy metals in sediment was calculated and the source of heavy metals in sediment was judged by correlation analysis. Calculate the accumulative index, and judge the pollution level of heavy metals in sediment based on the calculation of membership degree; Calculate the single factor pollution index, calculate the potential ecological hazard index, and then calculate the ecological risk of heavy metals in sediment based on the membership degree. The invention overcomes the shortcomings of uncertainty of data selection and evaluation results, reasonably evaluates the environmentalquality of heavy metals in sediments, and provides effective technical support for environmental quality management.

Description

technical field [0001] The invention relates to an environmental quality assessment method, in particular to a sediment heavy metal environmental quality assessment method, which belongs to the technical field of environmental protection. Background technique [0002] With population growth and economic development, sediments are considered to be the "sink" of water pollutants, and heavy metals, as serious pollutants, have received widespread attention. In order to evaluate the source of heavy metals in sediments, pollution level and ecological risk, many methods have been developed, including multivariate statistical method, enrichment coefficient method, potential ecological risk index method, etc., to explore the transfer and transformation mechanism of pollutants, sediment risk assessment and The establishment of environmental quality benchmarks is of great significance. [0003] However, in the previous evaluations, the heavy metal content in sediments and the regional...

Claims

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Application Information

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IPC IPC(8): G06Q10/06
CPCG06Q10/0635G06Q10/06393
Inventor 李一平赖秋英郭辉
Owner HOHAI UNIV
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