JP2011072941A - Method for deciding state of soil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for deciding the state of soil which can alleviate the mental feeling of dislike of land owners of ground after cleaning, or neighboring residents by embodying in the actual fields whether the ground after cleaning is true cleaned or not by using plant. <P>SOLUTION: Soil 50 for evaluation under cleaning treatment, or plant 51 is planted in the soil 50 for evaluation under cleaning treatment is used as a sensor for deciding purifying effect of the soil 50 for evaluation. data of the plant concerned extracted after planting the plant 51 in the soil which is not polluted is taken as a sample data, data of the plant 51 concerned extracted after planting the plant 51 in the soil 50 for evaluation is taken for a soil evaluation data, the soil evaluation data and the sample data concerned are compared, and if close to each other, the soil 50 is decided to be purified. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a soil state determination method using plants.

  Conventionally, for example, methods for purifying contaminated soil by supplying microorganisms that decompose oil to the contaminated soil have been proposed (see, for example, Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 9-276837 JP-A-9-276840

As a method for confirming the effect of purification after the treatment for purifying the contaminated soil, it is common to investigate the components of the soil after the purification. However, in the case of component survey, soil is sampled at a rate of 100m ² (10m × 10m), and it is only proof by the numerical analysis data, and whether the land that has undergone the purification process is really purified or not. Psychological situation (psychological disgust) in which there is no object to embody at the site, and as landowners and neighbors of the land that has undergone purification treatment, it is not possible to be sure whether it is really being purified. There was a problem that it was often impossible to wipe out.
The present invention has been made in view of the above-mentioned problems. By embodying whether or not the land subjected to the purification treatment is really purified at the site using the plant, the land right of the land subjected to the purification treatment is obtained. The purpose is to provide a soil condition determination method that can reduce the psychological disgust of the elderly and the neighboring residents.

The soil state determination method according to the present invention is a sensor for determining a purification effect of the evaluation target soil by planting a plant in the evaluation target soil during the purification process or the evaluation target soil after the purification process. Since it uses, it can embody in the said field that the land which performed the purification process is purified by the said plant, Therefore The psychological disgust of the landowner of the land which performed the purification process, and a neighboring inhabitant can be reduced.
The data of the plant collected after planting the plant on uncontaminated soil is used as sample data, the data of the plant collected after planting the plant on the evaluation target soil is used as soil evaluation data, the soil evaluation data and the sample If the data is compared and approximated, it is determined that the evaluation target soil has been purified. Therefore, it is possible to embody the fact that the land subjected to the purification treatment has been purified by the plant, and the data Can also help to reduce the psychological disgust of landowners and neighbors of the land that has undergone the purification process.

The figure which shows the state which planted the plant in the said evaluation object soil. The top view of the experimental apparatus for extract | collecting sample data. Sectional drawing of the experimental apparatus for extract | collecting sample data. The expanded sectional view of a plant growth part.

In the embodiment, as shown in FIG. 1, a plant 51 is planted in the evaluation target soil 50 during the purification process or the evaluation target soil 50 after the purification process, and the purification effect of the evaluation target soil 50 is determined for the plant 51. It is used as a sensor for
For example, the plant 51 is planted in the evaluation target soil 50 during the purification process or the contaminated soil is purified during the purification process of the contaminated soil in the former site after dismantling a building that has become a soil contamination source such as a hospital or factory. The plant 51 is planted in the soil 50 to be evaluated after the evaluation.
As the plant 51, a plant 51 that reacts with a soil pollutant that contaminates the soil is used. For example, as the plant 51 that reacts with soil pollutants, the plant 51 reacts with oil (such as heavy oil) as soil pollutants, the plant 51 reacts with mercury as soil pollutants, and the lead as soil pollutants. Plant 51 etc. are used.
The plant 51 that reacts to soil pollutants is a plant that shows a difference in growth state between when planted in soil contaminated with soil pollutants and when planted in soil not contaminated with soil pollutants. Say 51. For example, the plant 51 shows a difference in the growth state such as the saturation and color of the leaves and stems, the temperature of the plant 51, and the leaf form.

  A plant 51 is planted in the evaluation target soil 50 described above, and the state of the evaluation target soil 50 is determined by observing a growth change of the plant 51. The determination is made by comparing the sample data with the observation data.

An experimental apparatus for collecting sample data will be described with reference to FIG. The experimental apparatus 1 includes a plurality of plant growing units 2. The plant growing section 2 (2A; 2B; 2C; 2D; 2E) is planted in the area partition material 3 for partitioning the area, the soil 4 provided in the area surrounded by the area partition material 3, and the soil 4 The plant 51 is comprised. The region is formed in a cubic region having a vertical dimension a = 60 cm, a horizontal dimension b = 60 cm, and a depth dimension c = 90 cm partitioned by the bottom surface 6 and the region partition material 3. As shown in FIG. 4, the soil 4 is formed on the adsorption layer 7 provided on the bottom surface 6, the lower quality soil layer 8 provided on the adsorption layer 7, and the lower quality soil layer 8. It is comprised by the contaminated soil layer 9 provided and the upper quality soil layer 10 provided on the contaminated soil layer 9.
The depth dimension 7a of the adsorption layer 7 is 30 cm, the depth dimension 8a of the lower quality soil layer 8 is 10 cm, the depth dimension 9a of the contaminated soil layer 9 is 30 cm, and the depth dimension 10a of the upper quality soil layer 10 is 15 cm. did. The soil for planting Agatha, which will be described later, has a depth dimension 7a of the adsorption layer 7 of 20 cm, a depth dimension 8a of the lower quality soil layer 8 of 10 cm, a depth dimension 9a of the contaminated soil layer 9 of 100 cm, and an upper quality soil. The depth dimension 10a of the layer 10 was 50 cm. The purpose is to use different depths that can be monitored depending on the depth of the root system of the plant.

Plant growth part 2A with a lead-contaminated soil layer containing lead as a pollutant, Plant growth part 2B with a mercury-contaminated soil layer containing mercury as a pollutant, and an oil-contaminated soil layer containing oil as a pollutant A plant growing part 2C provided with a mixed contaminated soil layer containing lead, mercury and oil as pollutants was prepared. Moreover, the plant growth part 2E only for the quality soil layer which does not contain a pollutant was produced for the comparison.
The adsorption layer 7 of the plant growing parts 2A, 2B, 2D provided with a lead-contaminated soil layer, a mercury-contaminated soil layer, or a mixed-contaminated soil layer was prepared with a heavy metal adsorbent + sandy soil. The adsorption layer 7 of the plant growing part 2C provided with the oil-contaminated soil layer was produced by using an oil adsorbent + sandy soil. The adsorption layer 7 prevents contaminants from moving to other areas.

As a test plant 52 to be planted in the plant breeding unit 2, a fern 20, a scallop 21, a sagebrush 22, a mugwort 23, a buckwheat 24, a kishibu 25, an agusa 26, and a three-type mixed turf 27 were used.
That is, a plant growing unit 2A having a lead contaminated soil layer, a plant growing unit 2B having a mercury contaminated soil layer, a plant growing unit 2C having an oil contaminated soil layer, a plant growing unit 2D having a mixed contaminated soil layer, A plant growing section 2E having only a good soil layer is prepared for each type of the test plant 52, and the same type of the test plant 52 is planted in each plant growing section 2 having a different soil layer. The experimental apparatus 1 was configured to allow visual observation and tactile observation of the difference in the growth of the same plant due to the difference.

Data of the test plant 52 planted in each plant growing part 2 of the experimental apparatus 1 such as visual observation data, tactile sensation observation data, measurement data, etc. are collected periodically (for example, every week, every month). Sample data.
The visual observation data is data that can be observed with eyes, such as the presence or absence of leaf spots or the thickness of a stem.
The tactile sensation observation data is data that can be observed by touching with a hand such as the presence or absence of a foreign object when a leaf or stem is touched with the hand.
The measurement data is, for example, plant color data such as saturation and chromaticity obtained by analyzing a captured image of the plant, temperature data of the plant measured by thermography, weak current data flowing through the plant, and the like.

  Then, the soil 50 to be evaluated during the purification process or the contaminated soil is purified during the purification process of the contaminated soil in the former site after dismantling the building that has been a soil contamination source such as a hospital or a factory as described above. The plant 51 is planted in the evaluation target soil 50 after the treatment, and data obtained in the process of growing the plant 51, for example, visual observation data, tactile observation data, measurement data, etc. are periodically (for example, every week, 1 Collected every month) as soil evaluation data.

By comparing the soil evaluation data regarding the same type of plant 51 and the sample data, the evaluation target soil 50 can be appropriately evaluated. That is, if the soil evaluation data is similar to the sample data collected from the test plant 52 grown in the plant growing unit 2E having only a good quality soil layer, it is determined that the soil of the evaluation target soil 50 has been purified.
That is, the plant 51 can be used as a sensor for determining the purification effect of the evaluation target soil 50.

  For example, when the soil of the former site after demolition of a building that was a source of soil contamination such as a hospital or factory is being purified, or after it has been purified, the former site is purified. When explaining to the landowners and neighbors of the site that they have been safe, the appearance change of the plant 51 planted in the site as the evaluation target soil 50 is regularly shown to the landowners and neighbors. By presenting to the landowner and neighbors that the appearance change is similar to the appearance change of the test plant 52 grown in the plant breeding unit 2E having only the high quality soil layer, the landowner and neighbors Since the present condition can be confirmed on site by the plant 51 that embodies that the site is being purified, the purification effect can be wiped away from the psychological disgust of landowners and neighboring residents.

  In addition to presenting the landowner and neighboring residents that the change in appearance is similar to the change in appearance of the test plant 52 grown in the plant growing section 2E having only the high-quality soil layer, the soil evaluation data and the high-quality soil By showing that the sample data collected from the test plant 52 grown in the layer-only plant growing section 2E is similar, the purification effect can be supported by the data, so that This will reduce the psychological disgust of landowners and neighbors.

  Moreover, if the soil evaluation data regarding the same kind of plant 51 and the sample data collected from the test plant 52 grown in the plant growing parts 2A to 2D are approximate, it is determined that the evaluation target soil 50 is not purified. To do. By performing the purification process again by this determination, it is possible to reduce the psychological disgust of the landowner and the neighboring residents of the land that has performed the purification process. In this case, it is determined whether the soil evaluation data is similar to the sample data collected from the test plant 52 grown in the plant breeding units 2A to 2D having the contaminated soil layer containing the pollutant. Thus, it is possible to determine what contaminants remain in the evaluation target soil 50. If the pollutant of the said evaluation object soil 50 is known, the said evaluation object soil 50 can be purified now using the purification method which can remove the contaminant effectively.

  According to the embodiment, the plant 51 can be used as a sensor for determining the purification effect after the purification treatment of the evaluation target soil 50, and the person concerned with the evaluation target soil 50 purifies the evaluation target soil 50. Since the effect can be confirmed on the spot by the plant 51 that embodies that the evaluation target soil 50 has been purified, the psychological disgust of the parties concerned with the evaluation target soil 50 is eliminated.

  According to the embodiment, when the purification of the evaluation target soil 50 is incomplete, the contaminant remaining in the evaluation target soil 50 can be determined. Therefore, a purification method that can effectively remove the contaminant is provided. It becomes possible to purify the soil 50 to be evaluated.

  In addition, by planting the various plants 51 described above in the contaminated soil as the evaluation target soil 50, recording the soil evaluation data of the various plants 51, and comparing the soil evaluation data with the sample data, Since it becomes possible to identify the pollutant in the contaminated soil, the contaminated soil can be purified using a purification method capable of effectively removing the pollutant in the contaminated soil.

  50 soil to be evaluated, 51 plants.

Claims (2)

  A soil state determination method characterized in that a plant is planted in the evaluation target soil during the purification treatment or the evaluation target soil after the purification treatment, and the plant is used as a sensor for determining the purification effect of the evaluation target soil. .   The data of the plant collected after planting the plant on uncontaminated soil is used as sample data, the data of the plant collected after planting the plant on the evaluation target soil is used as soil evaluation data, the soil evaluation data and the sample 2. The soil state determination method according to claim 1, wherein the evaluation target soil is determined to be purified if the data is compared and approximated.

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