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Ecological risk assessment method for soil harmful trace elements and nitrate pollution

A technology for trace elements and ecological risks, applied in measurement devices, color/spectral characteristic measurement, sampling, etc., to achieve accurate sampling and detection

Pending Publication Date: 2020-12-11
西藏自治区农牧科学院农业质量标准与检测研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an ecological risk assessment method for soil harmful trace elements and nitrate pollution, which solves the problem of land planting risk assessment

Method used

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  • Ecological risk assessment method for soil harmful trace elements and nitrate pollution
  • Ecological risk assessment method for soil harmful trace elements and nitrate pollution
  • Ecological risk assessment method for soil harmful trace elements and nitrate pollution

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as Figure 1-4 As shown, the embodiment of the present invention provides an ecological risk assessment method for soil harmful trace elements and nitrate pollution, including the following steps: S1: randomly select five points in the area to be evaluated, and four points around the five points are rectangularly distributed, The distance between one point in the interior and the four points in the periphery is the same, and the soil at the five points is penetrated and layered to sample, so that the obtained sample data is more accurate, and the nitrate data is detected at the vertical depth. Make the detection and evaluation data more scientific and accurate; S2: The soil samples collected in S1 are dried separately, and then the dried soil samples are crushed through a 0.104mm sieve to avoid mixing the water in the soil with the added water and causing the samples There is an error in the total capacity; S3: Take 15g of the soil sample filtered in S2 and put it ...

Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 is that the five-point sampling method in SI can be replaced by an equidistant sampling method, and the samples collected by the equidistant sampling method are also representative, so that the sample detection and evaluation data are more scientific and accurate .

Embodiment 3

[0044] The soil samples collected in S1 are dried separately, and then the dried soil samples are crushed through a 0.104mm sieve. The soil samples can also be dried. After drying, directly sample 15g, add water 50mm, and then repeatedly stir in the Filtration is performed so that the nitrates are sufficiently reconnected in the water.

[0045] Attached sample test data sheet:

[0046] Nitrate detection data of five-point multi-layer sampling (unit: mg per cubic meter)

[0047] The first point Second point third point fourth point Fifth level one 3.32 3.12 3.40 3.22 2.88 Second floor 3.00 2.77 3.11 2.77 2.73 the third floor 2.72 2.03 2.72 2.02 2.21 fourth floor 2.10 1.08 2.02 1.88 2.07 fifth floor 1.02 1.01 1.52 1.62 1.78

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Abstract

The invention provides an ecological risk assessment method for soil harmful trace elements and nitrate pollution, and relates to the technical field of environmental protection, and the method comprises the following steps: S1, randomly taking five points in a to-be-assessed region, enabling the peripheral four points of the five points to be distributed in a rectangular shape, and enabling the distances between one internal point and the peripheral four points to be consistent, and performing probing stratified sampling on the soil at five point positions; S2, separately drying the soil samples collected in the step S1, crushing the dried soil samples, and sieving the crushed soil samples with a 0.104 mm sieve; S3, taking and putting 15 g of the soil sample filtered in the step S2 into abeaker, adding 50 mm of water into the beaker to be stirred, filtering the obtained aqueous solution, filtering the aqueous solution of each sample five times, obtaining a clear aqueous solution, andthen fixing the volume. Through multi-point vertical sampling and sampling by the sampling rod, the evaluation and detection data of the soil are more scientific and accurate, and the sampling is simple, convenient and representative.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an ecological risk assessment method for soil harmful trace elements and nitrate pollution. Background technique [0002] Salts formed by the reaction of nitrate HNO3 with metals. It consists of metal ions (ammonium ions) and nitrate ions. The common ones are sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate, lead nitrate, cerium nitrate, etc. On October 27, 2017, the list of carcinogens released by the International Agency for Research on Cancer of the World Health Organization was initially compiled for reference. Nitrate or nitrite ingested under conditions that lead to endogenous nitrosation is included in the list of 2A carcinogens. [0003] In the process of social development, some factory buildings built in rural areas need to be demolished. The demolished land will be reused by farmers to grow crops and raise aquatic products. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/08G01N1/44G01N1/28G01N1/34G01N21/31
CPCG01N1/08G01N1/44G01N1/286G01N1/34G01N21/31
Inventor 刘青海张飞龙邱城李继荣潘崇双明玛卓嘎米玛
Owner 西藏自治区农牧科学院农业质量标准与检测研究所
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