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
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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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