JP6008522B2 - Decontamination method for contaminated soil - Google Patents

Decontamination method for contaminated soil Download PDF

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JP6008522B2
JP6008522B2 JP2012053803A JP2012053803A JP6008522B2 JP 6008522 B2 JP6008522 B2 JP 6008522B2 JP 2012053803 A JP2012053803 A JP 2012053803A JP 2012053803 A JP2012053803 A JP 2012053803A JP 6008522 B2 JP6008522 B2 JP 6008522B2
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soil
adsorbing
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田中　伸幸
伸幸 田中
浩幸 正木
浩幸 正木
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Central Research Institute of Electric Power Industry
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本発明は、放射性物質で汚染された土壌の除染処理を行う汚染土壌の除染処理方法に関する。   The present invention relates to a decontamination method for contaminated soil, in which soil contaminated with radioactive substances is decontaminated.

化学物質で汚染された土壌を処理する場合、汚染された土壌を掘削して産廃処分したり、生石灰や微生物を用いて浄化したりすることが行われている。また、汚染された土壌を掘削し、汚染された土壌をシート状の化学物質吸着材で挟み込み、その上に汚染されていない土で覆うことも提案されている（例えば、特許文献１参照）。   When treating soil contaminated with chemical substances, the contaminated soil is excavated and disposed of by industrial waste, or purified using quick lime or microorganisms. It has also been proposed to excavate contaminated soil, sandwich the contaminated soil with a sheet-like chemical substance adsorbent, and cover it with uncontaminated soil (see, for example, Patent Document 1).

しかし、特許文献１で開示された技術は、汚染された土壌の浄化を想定している技術であるため、放射性物質等、特定の不純物で汚染された土壌の処理を行うには、根本的な解決ができないのが現状である。   However, since the technique disclosed in Patent Document 1 is a technique assuming purification of contaminated soil, it is fundamental to treat soil contaminated with specific impurities such as radioactive substances. The current situation is that it cannot be resolved.

特開２０１０−２５３４２０号公報JP 2010-253420 A

本発明は上記状況に鑑みてなされたもので、特定の汚染物質である放射性物質を吸着して放射性物質で汚染された土壌の除染処理を行うことができる汚染土壌の除染処理方法を提供することを目的とする。   The present invention has been made in view of the above situation, and provides a decontamination treatment method for contaminated soil that can adsorb a radioactive substance that is a specific pollutant and decontaminate soil contaminated with the radioactive substance. The purpose is to do.

上記目的を達成するための請求項１に係る本発明の汚染土壌の除染処理方法は、放射性物質が表層土に含まれた汚染土壌を除染処理する汚染土壌の除染処理方法であって、放射性物質が含まれた前記表層土を除去して上土壌面を露出させ、前記上土壌面の上層土を除去して下土壌面を露出させ、放射性物質を吸着する吸着成分物質を有する吸着成分物質材を、前記下土壌面に敷設し、前記上層土は、上層側の第１上層土及び下層側の第２上層土とからなり、前記上土壌面の上層土を除去して露出する下土壌面は、前記上土壌面の第１上層土を除去した後に第１下土壌面を露出させ、前記第１下土壌面の第２上層土を除去した後に露出する第２下土壌面であり、前記第２下土壌面に前記吸着成分物質材を敷設し、吸着成分物質材の上に前記表層土を埋め戻し、埋め戻された前記表層土の上に前記第１上層土を埋め戻すと共に、埋め戻された前記第１上層土の上に前記第２上層土を埋め戻すことを特徴とする。 The method for decontamination of contaminated soil of the present invention according to claim 1 for achieving the above object is a method for decontamination of contaminated soil, in which radioactive soil contains decontaminated soil containing surface soil. Removing the surface soil containing radioactive material to expose the upper soil surface, removing the upper soil surface of the upper soil surface to expose the lower soil surface, and having an adsorbing component material that adsorbs the radioactive material A component material is laid on the lower soil surface, and the upper soil layer is composed of a first upper soil layer on the upper layer side and a second upper soil layer on the lower layer side, and is exposed by removing the upper soil layer on the upper soil surface. The lower soil surface is a second lower soil surface which is exposed after removing the first upper soil surface after removing the first upper soil surface of the upper soil surface and after removing the second upper soil layer of the first lower soil surface. Yes, the adsorbing component material is laid on the second lower soil surface, and the surface layer is formed on the adsorbing component material Backfilling, with backfill the first overburden on the surface soil was backfilled, characterized in that backfilling the second overburden above the backfilled first overburden.

請求項１に係る本発明では、放射性物質を吸着する吸着成分物質を有する吸着成分物質材を下土壌面に敷設し、表層土を埋め戻すと共に、その上に上層土を埋め戻すので、上層土の下で吸着成分物質材に放射性物質を吸着することができる。このため、特定の汚染物質である放射性物質を吸着して放射性物質で汚染された土壌の除染処理を行うことが可能になる。また、土壌に雨等が浸み込んでも放射性物質が吸着成分物質材に吸着されることで、放射性物質が地下水に侵入することがない。
そして、吸着成分物質を有する吸着成分物質材の上に、表層土、上層側に存在していた第１上層土、下層側に存在していた第２上層土の順に土が埋め戻されるので、放射性物質が含まれた表層土を複数の層の内の下層に埋め戻して吸着成分物質材で放射性物質を吸着することができる。 In the present invention according to claim 1, since the adsorbing component material having the adsorbing component material that adsorbs the radioactive material is laid on the lower soil surface, the surface soil is backfilled, and the upper soil is backfilled thereon, The radioactive material can be adsorbed to the adsorbing component material material under. For this reason, it becomes possible to decontaminate soil contaminated with radioactive substances by adsorbing radioactive substances as specific pollutants. Moreover, even if rain or the like soaks into the soil, the radioactive substance is not adsorbed by the adsorbing component material, so that the radioactive substance does not enter the groundwater.
And since the soil is backfilled in the order of the surface soil, the first upper soil that existed on the upper layer side, the second upper soil that existed on the lower layer side on the adsorbing component material material having the adsorbing component material, The surface soil containing the radioactive substance can be backfilled in the lower layer of the plurality of layers, and the radioactive substance can be adsorbed by the adsorbing component material.

また、請求項２に係る本発明の汚染土壌の除染処理方法は、請求項１に記載の汚染土壌の除染処理方法において、吸着成分物質材の上に前記表層土を埋め戻した後、更に、吸着成分物質材を敷設して当該吸着成分物質材の上に前記第１上層土を埋め戻すことを特徴とする。 Moreover, the decontamination processing method of the contaminated soil of the present invention according to claim 2 is the decontamination processing method of contaminated soil according to claim 1 , after the surface soil is backfilled on the adsorbing component material, Furthermore, an adsorbing component material is laid and the first upper layer soil is backfilled on the adsorbing component material.

請求項２に係る本発明では、表層土を吸着成分物質材で挟むことができる。 In this invention which concerns on Claim 2 , surface soil can be pinched | interposed with an adsorption component material material.

また、請求項３に係る本発明の汚染土壌の除染処理方法は、請求項１もしくは請求項２に記載の汚染土壌の除染処理方法において、前記吸着成分物質材は、シート状の担体に、放射性物質を吸着する吸着成分物質が物理的に固定された吸着成分物質シート材であることを特徴とする。 Moreover, the decontamination processing method of the contaminated soil of this invention which concerns on Claim 3 is a decontamination processing method of the contaminated soil of Claim 1 or Claim 2 WHEREIN: The said adsorption component substance material is a sheet-like support | carrier. The adsorbing component material that adsorbs the radioactive substance is an adsorbing component material sheet material that is physically fixed.

請求項３に係る本発明では、吸着成分物質シート材を用いることで、任意の面積のシートで吸着成分物質材を配置することができ、また、シート材であるので、回収が必要になった際でも容易に回収することができる。 In the present invention according to claim 3 , by using the adsorbing component material sheet material, the adsorbing component material material can be arranged in a sheet of an arbitrary area, and since it is a sheet material, it is necessary to collect it. Even in this case, it can be easily recovered.

また、請求項４に係る本発明の汚染土壌の除染処理方法は、請求項３に記載の汚染土壌の除染処理方法において、前記吸着成分物質シート材の前記吸着成分物質は、石炭灰を由来としたゼオライトであり、前記吸着成分物質シート材は、バインダーで前記ゼオライトが前記担体に接着固定されていることを特徴とする。 Moreover, the decontamination processing method of the contaminated soil of the present invention according to claim 4 is the decontamination processing method of contaminated soil according to claim 3 , wherein the adsorbing component material of the adsorbing component material sheet material is coal ash. The adsorbing component material sheet material is characterized in that the zeolite is adhered and fixed to the carrier with a binder.

請求項４に係る本発明では、石炭灰を由来とした人工ゼオライトを用いて放射性物質（例えば、放射性セシウム）を吸着して除染することができる。 In the present invention according to claim 4 , radioactive material (for example, radioactive cesium) can be adsorbed and decontaminated using artificial zeolite derived from coal ash.

本発明の汚染土壌の除染処理方法は、特定の汚染物質である放射性物質を吸着して放射性物質で汚染された土壌の除染処理を行うことが可能になる。   The method for decontamination of contaminated soil according to the present invention makes it possible to decontaminate soil contaminated with radioactive substances by adsorbing radioactive substances that are specific pollutants.

本発明の一実施例に係る汚染土壌の除染処理方法に用いる汚染物吸着シートの概念図である。It is a conceptual diagram of the contaminant adsorption sheet used for the decontamination processing method of the contaminated soil which concerns on one Example of this invention. 汚染物吸着シートの作成例を説明する工程図である。It is process drawing explaining the example of preparation of a contaminant adsorbing sheet. ゼオライトの汚染物質吸着性能の一例を説明するグラフである。It is a graph explaining an example of the contaminant adsorption | suction performance of a zeolite. 本発明の一実施例に係る汚染土壌の除染処理方法の工程説明図である。It is process explanatory drawing of the decontamination processing method of the contaminated soil which concerns on one Example of this invention. 本発明の一実施例に係る汚染土壌の除染処理方法の工程説明図である。It is process explanatory drawing of the decontamination processing method of the contaminated soil which concerns on one Example of this invention.

本実施例の汚染土壌の除染処理方法に用いる吸着成分物質材としての吸着成分物質シート材は、担体としてシート状の布を適用し、吸着成分物質として、石炭灰を由来とするゼオライト（人工ゼオライト）を布に接着したものである。そして、汚染土壌の除染処理方法は、吸着成分物質シート材のゼオライトにより、特定の汚染物質として放射性物質（放射性セシウム等）に汚染された汚染土壌の放射性セシウム等を除染処理するものである。   The adsorbing component material sheet material as the adsorbing component material material used in the decontamination treatment method of the contaminated soil of this example applies a sheet-like cloth as a carrier, and the adsorbing component material is a zeolite (artificial material) derived from coal ash. Zeolite) is bonded to cloth. And the decontamination processing method of contaminated soil carries out the decontamination process of the radioactive cesium etc. of the contaminated soil contaminated by the radioactive substance (radiocesium etc.) as a specific pollutant with the zeolite of the adsorption component substance sheet material. .

図１から図３に基づいて本発明の除染処理方法に使用する汚染物吸着シートを具体的に説明する。   The contaminant adsorbing sheet used in the decontamination processing method of the present invention will be specifically described with reference to FIGS.

図１には本発明の一実施例に係る汚染物吸着シートの概念、図２には固体の吸着成分物質が適用される汚染物吸着シートの作成例を説明する工程、図３にはゼオライトの汚染物質吸着性能の一例を説明するグラフを示してある。   FIG. 1 illustrates a concept of a contaminant adsorbing sheet according to an embodiment of the present invention, FIG. 2 illustrates a process for explaining an example of creating a contaminant adsorbing sheet to which a solid adsorbing component substance is applied, and FIG. The graph explaining an example of pollutant adsorption | suction performance is shown.

図１に示すように、シート状の担体である布シート１の表面には、固体状態の吸着成分物質２が物理的に固定され、汚染物吸着シート３が構成されている。吸着成分物質２は、例えば、汚染物質である放射性セシウムを吸着する人工ゼオライトが用いられる。固体状態の吸着成分物質２としては、活性アルミナ、バーミキュライト、石炭灰、チェストナット、ハイドロタルサイト、天然ゼオライト等が適用される。吸着成分物質２の種類により、放射性コバルト、放射性ストロンチウム、放射性ヨウ素等が汚染物質として吸着される。   As shown in FIG. 1, a solid adsorbing component substance 2 is physically fixed on the surface of a cloth sheet 1 that is a sheet-like carrier, and a contaminant adsorbing sheet 3 is configured. As the adsorbing component substance 2, for example, an artificial zeolite that adsorbs radioactive cesium, which is a contaminant, is used. As the adsorbing component substance 2 in the solid state, activated alumina, vermiculite, coal ash, chestnut, hydrotalcite, natural zeolite and the like are applied. Depending on the type of the adsorbing component substance 2, radioactive cobalt, radioactive strontium, radioactive iodine and the like are adsorbed as contaminants.

図２に基づいて汚染物吸着シート３の作成手順を説明する。   A procedure for creating the contaminant adsorbing sheet 3 will be described with reference to FIG.

図２（ａ）に示すように、布シート１の表面に接着剤５を塗布し、図２（ｂ）に示すように、接着剤５が塗布された面に必要な量の固体粒・粉状の吸着成分物質２を振り掛ける、振り撒く、吹き付ける等し、吸着成分物質２を接着剤５により布シート１の面に接着させる（物理的に固定させる）。これにより、図２（ｃ）に示すように、表面が吸着成分物質２で覆われた布シート１が作成され、汚染物吸着シート３とされる。   As shown in FIG. 2 (a), the adhesive 5 is applied to the surface of the cloth sheet 1, and as shown in FIG. 2 (b), the necessary amount of solid particles / powder on the surface to which the adhesive 5 has been applied. The adsorbing component material 2 is sprinkled, sprinkled, sprayed, etc., and the adsorbing component material 2 is adhered (physically fixed) to the surface of the cloth sheet 1 by the adhesive 5. Thereby, as shown in FIG. 2 (c), the cloth sheet 1 whose surface is covered with the adsorbing component substance 2 is created and used as the contaminant adsorbing sheet 3.

図３に基づいてゼオライト（吸着成分物質２）の吸着性能の試験結果を説明する。   The test results of the adsorption performance of zeolite (adsorption component substance 2) will be described with reference to FIG.

図３に示した結果は、２０ｍＬの試験水（濃度５０ｐｐｍのＣｓ、Ｓｒ、Ｃｏ、Ｉ）の中に吸着成分物質２（ゼオライト）を入れて攪拌し、一定時間経過した後に試験水の一部を取出して、Ｃｓ（○）、Ｓｒ（●）、Ｃｏ（△）、Ｉ（▲）の濃度を測定した結果である。図に示すように、ゼオライトを用いた吸着成分物質２は、主に、汚染物質としてのＣｓ（○）及びＩ（▲）が吸着されていることが判る。つまり、吸着成分物質２（人工ゼオライト）を固定した汚染物吸着シート３を用いることで、特定の汚染物質であるＣｓを主に吸着できることが判る。   The results shown in FIG. 3 show that the adsorbing component substance 2 (zeolite) is stirred in 20 mL of test water (Cs, Sr, Co, I having a concentration of 50 ppm), and a part of the test water is passed after a certain period of time. This is a result of measuring the concentration of Cs (◯), Sr (●), Co (Δ), and I (▲). As shown in the figure, it can be seen that the adsorbing component substance 2 using zeolite mainly adsorbs Cs (◯) and I (▲) as contaminants. That is, it can be seen that Cs which is a specific contaminant can be mainly adsorbed by using the contaminant adsorbing sheet 3 to which the adsorbing component material 2 (artificial zeolite) is fixed.

図４、図５に基づいて汚染物吸着シート３を用いて実施する本発明の汚染土壌の除染処理方法の実施例を説明する。図４には汚染物吸着シート３を敷設するまでの掘削・除去の工程、図５には汚染物吸着シート３の上に掘削した土を埋め戻す工程を示してある。   The Example of the decontamination processing method of the contaminated soil of this invention implemented using the contaminant adsorption sheet 3 based on FIG. 4, FIG. 5 is demonstrated. FIG. 4 shows a process of excavation / removal until the contaminant adsorbing sheet 3 is laid, and FIG. 5 shows a process of refilling the excavated soil on the contaminant adsorbing sheet 3.

図４（ａ）（ｂ）に示すように、汚染物質（放射性物質等）を含む汚染土の表層土３０を除去し、上層土３１の上土壌面３２を露出させる。上層土３１は上層側の第１上層土３３及び下層側の第２上層土３５とからなっている。図４（ｃ）に示すように、上層土３１の第１上層土３３を掘削して除去し、第２上層土３５の第１下土壌面３４を露出させる。図４（ｄ）に示すように、第２上層土３５を掘削して除去し、下土壌面としての第２下土壌面３６を露出させ、第２下土壌面３６に汚染物吸着シート３を敷設する。   As shown in FIGS. 4A and 4B, the surface soil 30 of the contaminated soil containing the contaminant (radioactive material or the like) is removed, and the upper soil surface 32 of the upper soil 31 is exposed. The upper layer soil 31 includes a first upper layer soil 33 on the upper layer side and a second upper layer soil 35 on the lower layer side. As shown in FIG. 4C, the first upper soil layer 33 of the upper soil layer 31 is excavated and removed, and the first lower soil surface 34 of the second upper soil layer 35 is exposed. As shown in FIG. 4 (d), the second upper layer soil 35 is excavated and removed to expose the second lower soil surface 36 as the lower soil surface, and the contaminant adsorbing sheet 3 is placed on the second lower soil surface 36. Lay down.

図５（ａ）に示すように、汚染物吸着シート３の上に汚染土の表層土３０を埋め戻し、更に、表層土３０の上に汚染物吸着シート３を敷設する。図５（ｂ）に示すように、上層土３１の上層側に存在した第１上層土３３を汚染物吸着シート３の上に埋め戻し、上層土３１の下層側に存在した第２上層土３５を第１上層土３３の上に埋め戻す。即ち、上層土３１の下層側に存在した第２上層土３５が表層の土となるように埋め戻しを行う。   As shown in FIG. 5A, the contaminated soil surface layer 30 is backfilled on the contaminant adsorbing sheet 3, and the contaminant adsorbing sheet 3 is laid on the surface soil 30. As shown in FIG. 5 (b), the first upper layer soil 33 existing on the upper layer side of the upper layer soil 31 is backfilled on the contaminant adsorbing sheet 3, and the second upper layer soil 35 existing on the lower layer side of the upper layer soil 31. Is backfilled on the first upper layer soil 33. That is, backfilling is performed so that the second upper layer soil 35 existing on the lower layer side of the upper layer soil 31 becomes the surface soil.

従って、汚染物質（放射性物質等）を含む汚染土の表層土３０が、汚染物吸着シート３で挟まれた状態で、第２上層土３５及び第１上層土３３からなる上層土３１の下層に埋め戻される。このため、上層土３１の下側で表層土３０の放射性物質等が汚染物吸着シート３に吸着されて除染が行われ、表層土３０を廃棄物として別の場所に運ぶ等の処分を行うことなく汚染土壌を除染処理することが可能になり、汚染土壌の除染処理における廃棄物処理の問題を解決することができる。   Therefore, the surface soil 30 of the contaminated soil containing the pollutant (radioactive material, etc.) is sandwiched between the contaminant adsorbing sheets 3 and below the upper layer soil 31 composed of the second upper layer soil 35 and the first upper layer soil 33. Backfilled. For this reason, the radioactive material of the surface soil 30 is adsorbed by the contaminant adsorbing sheet 3 below the upper soil 31, and decontamination is performed, and disposal such as transporting the surface soil 30 to another place as waste is performed. It becomes possible to decontaminate the contaminated soil without any problem, and the problem of waste treatment in the decontamination treatment of the contaminated soil can be solved.

そして、汚染物質（放射性物質等）が含まれる汚染土を地表面から深い位置に存在させるため、地表面の放射線量を大幅に減らすことができる。また、放射性物質の存在が地表面から深い位置となるため、地表面で農作物等の作物を栽培しても、放射線の影響が作物に及ぶことがなく、作物を安全に栽培することが可能になる。   And since the contaminated soil containing pollutants (radioactive substances etc.) exists in a deep position from the ground surface, the radiation dose on the ground surface can be greatly reduced. In addition, since the presence of radioactive substances is deep from the ground surface, even if crops such as agricultural crops are cultivated on the ground surface, the effects of radiation do not affect the crops, making it possible to grow crops safely. Become.

また、雨等が上層土３１に浸み込んでも、汚染物吸着シート３により、放射性物質等が地下水に侵入することが阻止される。また、汚染物吸着シート３を回収することで放射性物質等を処分することができるので、放射性物質等を別途処理する必要が生じた場であっても汚染物吸着シート３を回収することで、安全で且つ容易に対応することが可能になる。   Moreover, even if rain or the like soaks into the upper soil 31, the contaminant adsorbing sheet 3 prevents radioactive substances and the like from entering the groundwater. In addition, since the radioactive material etc. can be disposed by collecting the contaminant adsorbing sheet 3, even if it is necessary to treat the radioactive material etc. separately, by collecting the contaminant adsorbing sheet 3, It becomes possible to respond safely and easily.

上述した実施例では、吸着成分物質材として汚染物吸着シート３を適用した例を挙げて説明したが、第２下土壌面３６と汚染土の表層土３０との間（及び汚染土の表層土３０と第１上層土３３との間）の必要な箇所に、吸着成分物質２（人工ゼオライト）を直接敷設することも可能である。   In the embodiment described above, an example in which the contaminant adsorbing sheet 3 is applied as the adsorbing component material has been described. However, between the second lower soil surface 36 and the surface soil 30 of the contaminated soil (and the surface soil of the contaminated soil). It is also possible to lay the adsorbing component substance 2 (artificial zeolite) directly at a necessary position between the upper layer soil 30 and the first upper layer soil 33).

上述した汚染土壌の除染処理方法は、表層土３０を廃棄物として別の場所に運ぶ等の処分を行うことなく汚染土壌を除染処理することが可能になり、特定の汚染物質である放射性物質を吸着して放射性物質で汚染された土壌の除染処理を行うことが可能になる。   The above-described decontamination method for contaminated soil makes it possible to decontaminate the contaminated soil without disposing of the surface soil 30 as a waste and transporting it to another place. It becomes possible to decontaminate soil contaminated with radioactive substances by adsorbing substances.

本発明は、放射性物質で汚染された土壌の除染処理を行う汚染土壌の除染処理方法の産業分野で利用することができる。   INDUSTRIAL APPLICATION This invention can be utilized in the industrial field | area of the decontamination processing method of the contaminated soil which decontaminates the soil contaminated with the radioactive substance.

１ 布シート
２ 吸着成分物質
３ 汚染物吸着シート
３０ 表層土
３１ 上層土
３２ 上土壌面
３３ 第１上層土
３４ 第１下土壌面
３５ 第２上層土
３６ 第２下土壌面 DESCRIPTION OF SYMBOLS 1 Cloth sheet 2 Adsorption component substance 3 Contaminant adsorption sheet 30 Surface soil 31 Upper soil 32 Upper soil surface 33 First upper soil 34 First lower soil surface 35 Second upper soil 36 Second lower soil surface

Claims (4)

放射性物質が表層土に含まれた汚染土壌を除染処理する汚染土壌の除染処理方法であって、
放射性物質が含まれた前記表層土を除去して上土壌面を露出させ、
前記上土壌面の上層土を除去して下土壌面を露出させ、
放射性物質を吸着する吸着成分物質を有する吸着成分物質材を、前記下土壌面に敷設し、
前記上層土は、上層側の第１上層土及び下層側の第２上層土とからなり、
前記上土壌面の上層土を除去して露出する下土壌面は、
前記上土壌面の第１上層土を除去した後に第１下土壌面を露出させ、前記第１下土壌面の第２上層土を除去した後に露出する第２下土壌面であり、
前記第２下土壌面に前記吸着成分物質材を敷設し、
吸着成分物質材の上に前記表層土を埋め戻し、
埋め戻された前記表層土の上に前記第１上層土を埋め戻すと共に、
埋め戻された前記第１上層土の上に前記第２上層土を埋め戻す
ことを特徴とする汚染土壌の除染処理方法。 A decontamination method for contaminated soil, in which radioactive soil contains decontaminated soil containing surface soil,
Remove the surface soil containing radioactive material to expose the upper soil surface,
Removing the upper soil of the upper soil surface to expose the lower soil surface,
An adsorbing component material having an adsorbing component material that adsorbs radioactive material is laid on the lower soil surface,
The upper soil is composed of a first upper soil on the upper layer side and a second upper soil on the lower layer side,
The lower soil surface exposed by removing the upper soil of the upper soil surface is
The first lower soil surface is exposed after removing the first upper soil layer of the upper soil surface, and the second lower soil surface is exposed after removing the second upper soil layer of the first lower soil surface,
Laying the adsorbing component material on the second lower soil surface,
Backfill the surface soil on the adsorbing component material,
Backfilling the first upper soil on the surface soil that has been backfilled,
A decontamination treatment method for contaminated soil , wherein the second upper soil layer is backfilled on the backfilled first upper soil layer . 請求項１に記載の汚染土壌の除染処理方法において、
吸着成分物質材の上に前記表層土を埋め戻した後、更に、吸着成分物質材を敷設して当該吸着成分物質材の上に前記第１上層土を埋め戻す
ことを特徴とする汚染土壌の除染処理方法。 In the decontamination processing method of the contaminated soil of Claim 1 ,
After the surface soil is backfilled on the adsorbing component material, the adsorbing material material is further laid and the first upper soil is backfilled on the adsorbing material material. Decontamination processing method. 請求項１もしくは請求項２に記載の汚染土壌の除染処理方法において、
前記吸着成分物質材は、
シート状の担体に、放射性物質を吸着する吸着成分物質が物理的に固定された吸着成分物質シート材である
ことを特徴とする汚染土壌の除染処理方法。 In the decontamination processing method of the contaminated soil according to claim 1 or claim 2 ,
The adsorbing component material is
A decontamination method for contaminated soil, characterized in that it is an adsorbent component material sheet material in which an adsorbent component adsorbing a radioactive substance is physically fixed on a sheet-like carrier. 請求項３に記載の汚染土壌の除染処理方法において、
前記吸着成分物質シート材の前記吸着成分物質は、石炭灰を由来としたゼオライトであり、
前記吸着成分物質シート材は、バインダーで前記ゼオライトが前記担体に接着固定されている
ことを特徴とする汚染土壌の除染処理方法。 In the decontamination processing method of the contaminated soil of Claim 3 ,
The adsorbing component material of the adsorbing component material sheet material is a zeolite derived from coal ash,
The method for decontamination treatment of contaminated soil, wherein the adsorbing component material sheet material has the zeolite bonded and fixed to the carrier with a binder.
JP2012053803A 2012-03-09 2012-03-09 Decontamination method for contaminated soil Expired - Fee Related JP6008522B2 (en)

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