JP2004239793A - Method and apparatus for detecting soil oil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the defect of conventional soil oil detection requiring much time and labor, since it is necessary to fetch soil core-bored at a job site into analysis works to confirm the occurrence of contamination. <P>SOLUTION: In this soil oil detection method and its apparatus, soil to be inspected is shaded and irradiated with ultraviolet rays, and occurrence of luminescence of the soil is detected. A luminescence auxiliary agent is sprinkled over the soil. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【００１９】
なお、紫外線ランプの仕様は紫外線ランプ：２５４ｎｍ、３６５ｎｍ切り替えタイプ、紫外線強度：１０５０μＷ／平方ｃｍ、１２５０μＷ／平方ｃｍ、電源：ＡＣ１００Ｖ、５０／６０Ｈｚ、２００ｍＷである。また、箱３の大きさは幅５０ｃｍ、高さ３０ｃｍ、奥行き５０ｃｍである。
【００２０】
なお、上記遮光用の箱３は光を遮光できるものであれば任意の形状でよく、材質は金属、木、プラスチックでもよい。
【００２１】
【発明の効果】
従来はコア・ボーリング土壌を分析工場に持ち込んで分析しなければ油分の有無を確認できなかったが、本発明の土壌油分検出方法及び装置によれば、現場で昼夜を 問わず容易に土壌の汚染部分の有無及びその範囲の確認ができるという大きな利益がある。
【図面の簡単な説明】
【図１】本発明の土壌油分検出装置の説明用斜視図である。
【図２】本発明の土壌油分検出装置の説明用斜視図である。
【符号の説明】
１ 土壌
２ 紫外線ランプ
３ 箱
４ 観察窓
５ 発光補助剤[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for detecting soil oil content, and more particularly to a method and an apparatus for detecting soil oil content in factories, oil tanks, gas stations, and the like.
[0002]
[Prior art]
Conventionally, in order to identify contaminated areas of oil-contaminated soil, core boring is performed at multiple locations near oil storage tanks and pipes buried in the ground, and solvents such as hexane are added to the core-bored soil and eluted The presence or absence of contamination was confirmed by using an infrared spectrometer, an ultraviolet spectrometer, a gas chromatometer, weight measurement, mass spectrometry, or the like alone or in combination with the obtained oil.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional method, it is necessary to bring the above-mentioned core-bored soil to an analysis plant for the extraction and detection of the oil content of the core-bored soil, and it takes time and effort to determine the presence or absence of contamination.
[0004]
In addition, it is difficult to specify a wide range of contamination by a method in which soil is collected and inspected by boring mechanically at regular intervals.
[0005]
The present invention has been made to eliminate the above disadvantages.
[0006]
The present inventor has paid attention to the fact that many compounds, for example, aromatic compounds and heterocyclic compounds contained in oil components are excited by ultraviolet rays and emit fluorescence. For example, when silica gel powder was sprayed on soil to which 1% light oil was added and irradiated with ultraviolet light of 254 nm or 365 nm, fluorescence was easily observed in a dark place. The present invention has been made based on such findings.
[0007]
[Means for Solving the Problems]
The soil oil detecting device according to the present invention is characterized by comprising a light shielding means for shielding the soil to be inspected, a means for irradiating the soil with ultraviolet rays, and a means for detecting the light emission state of the soil.
[0008]
It is further characterized by further comprising a luminescence aid dispersed on the soil.
[0009]
Further, the soil oil detection method of the present invention is characterized in that it comprises a step of shading the soil to be inspected, a step of irradiating the soil with ultraviolet rays, and a step of detecting the presence or absence of light emission of the soil. .
[0010]
Further, in the method for detecting a soil oil content of the present invention, a step of spraying a luminescence aid on the soil to be inspected, a step of shading the soil, a step of irradiating the soil with ultraviolet rays, and a step of illuminating the luminescence aid. And the step of detecting the presence or absence of
[0011]
The luminescence aid is silica gel powder.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
In the present invention, as shown in FIG. 1, a light-shielding box 3 having an ultraviolet lamp 2 is put on a ceiling 1 of an on-site soil such as a factory, an oil tank, a gas station, etc., and the ultraviolet lamp 2 is turned on. Then, it is visually observed from the observation window 4 provided in the box 3 whether or not the soil emits fluorescence to confirm the presence or absence of a contaminated portion.
[0014]
The fluorescence is not so strong, and it may be difficult to visually recognize the fluorescence with the naked eye because of the color of the soil and the like. Therefore, in another embodiment of the present invention, as shown in FIG. 2, a porous absorbing material such as silica gel powder is sprayed on the surface of the soil 1 as a luminescence aid 5 and the ultraviolet lamp 2 is turned on. Then, it is visually observed from the observation window 4 of the box 3 whether or not the luminescent auxiliary agent 5 emits light to confirm whether or not there is a contaminated portion.
[0015]
According to this embodiment, when the soil 1 emits fluorescence due to ultraviolet irradiation, the luminescence auxiliary agent 5 shines white, so that it can be easily visually recognized by the naked eye.
[0016]
(Experimental example)
[0017]
Soil 1 to which gasoline, light oil, kerosene, and heavy oil A were added at 10,000 ppm, 5,000 ppm, and 2,500 ppm were prepared, and silica gel powder was sprayed on the surface of these soils 1 at 160 mg / 100 square cm. 1 was covered with the box 3, irradiated with ultraviolet rays from an ultraviolet lamp 2, and the light was observed with the naked eye from an observation window 4. Table 1 shows the observation results.
[0018]
[Table 1]

[0019]
The specifications of the ultraviolet lamp are: ultraviolet lamp: 254 nm, 365 nm switching type, ultraviolet intensity: 1050 μW / square cm, 1250 μW / square cm, power supply: AC100V, 50/60 Hz, 200 mW. The size of the box 3 is 50 cm in width, 30 cm in height, and 50 cm in depth.
[0020]
The light-shielding box 3 may have any shape as long as it can shield light, and may be made of metal, wood, or plastic.
[0021]
【The invention's effect】
Conventionally, it was not possible to confirm the presence of oil unless the core boring soil was brought to an analysis plant and analyzed.However, according to the method and apparatus for detecting the soil oil content of the present invention, soil contamination can be easily carried out day or night at the site. There is a great advantage that the existence and the range of the part can be confirmed.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view of a soil oil content detection device of the present invention.
FIG. 2 is a perspective view for explaining a soil oil content detecting device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Soil 2 UV lamp 3 Box 4 Observation window 5 Luminescent auxiliary

Claims (5)

A soil oil detecting device, comprising: a light-shielding means for shielding the soil to be inspected; a means for irradiating the soil with ultraviolet light; and a means for detecting a light emission state of the soil. 2. The soil oil content detecting device according to claim 1, further comprising a luminescence aid dispersed on the soil. Shading the soil to be inspected;
Irradiating the soil with ultraviolet light,
A method for detecting the presence or absence of light emission from the soil. Spraying a luminescence aid on the soil to be inspected;
A step of shading the soil,
Irradiating the soil with ultraviolet light,
Detecting the presence or absence of luminescence of the luminescence aid. 5. The method according to claim 4, wherein the luminescence aid is silica gel powder.

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