JP5438740B2 - Removal method of radioactive pollutants diffused over a wide area using pressurized water - Google Patents
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Description
本発明は地表面の広域に拡散した放射性物質の除去に関するものである。 The present invention relates to the removal of radioactive material diffused over a wide area on the ground surface.
放射性物質の拡散による汚染の除去は、従来は土壌であれば汚染土壌の掘削と除去による方法、汚染土壌への放射性物質を吸収する植物の播種と採取による方法（特許文献１）、道路などの構造物であれば洗浄などが主な方法とされていた。しかし土壌の掘削と除去は小規模なら効果的だが大規模な拡散による汚染は、手法として想定外の事であり、平坦地以外の山林、湖沼、丘陵などの高低差ある土地では経済的にも膨大な経費がかかりかつ重機の移動、登坂能力等も制限があり、さらには、多量の廃棄物を出すことになり、現実的には、従来の技術は広域に拡散した汚染には対応出来ない。 The removal of contamination by the diffusion of radioactive substances is conventionally a method by excavation and removal of contaminated soil if it is soil, a method by seeding and collecting plants that absorb radioactive material in contaminated soil (Patent Document 1) , roads, etc. For structures, cleaning was the main method. However, excavation and removal of soil is effective for small scales, but contamination due to large-scale diffusion is an unexpected method, and it is economically effective for land with differences in elevation such as forests, lakes, and hills other than flat land. It costs enormous expenses, and there are restrictions on the movement of heavy machinery, climbing ability, etc. In addition, a large amount of waste is generated, and in reality, conventional technology cannot cope with pollution spread over a wide area. .
本発明では広域に拡散した放射性物質を除去する為に、加圧浮上技術と加圧水の性質を利用する。放射性物質が土壌粒子や腐葉土の成分と化学的に結合する場合にこれを取り出すには、微細構造に入り込む流動性や微細な分散性や多様な反応性を持つナノ粒子を集合させたりする特殊な機能性がなければ安定な状態にある放射性物質を取り出せない。In the present invention, in order to remove the radioactive material diffused in a wide area, the pressure levitation technique and the property of pressurized water are used. In order to extract radioactive substances when they are chemically combined with soil particles or humus components, special substances such as collecting nanoparticles with fluidity, fine dispersion, and various reactivity that enter the microstructure are collected. Without functionality, radioactive materials in a stable state cannot be taken out.
（１）本発明は地表の広域に拡散した放射性物質を除去する際に従来行われている、土壌表面の掻き取り除去や放射性物質を分散させない目的で土壌を固化する処理剤を散布する方法などでは、多量の廃棄物の土壌が出てしまう事や、再利用の際に、放射性物質の再分散が必然的に起こるなどの問題を解決するものである。(1) The present invention is a conventional method for removing radioactive materials diffused over a wide area on the surface of the earth, such as a method of scraping off the soil surface or spraying a treatment agent that solidifies soil for the purpose of preventing the radioactive materials from being dispersed. Then, it solves problems such as a large amount of waste soil coming out and re-dispersion of radioactive materials inevitably occur during reuse.
（２）放射性物質の地表面への降下は、風向きや、降雨の影響を受け、放射線濃度が特異的に高いいわゆるホットスポットが出来る事があり、そこでは被爆の恐れから長時間の土木作業が困難になる。一般に土木作業は正確な測量に基づいて行われるもので作業開始に到るまで相応の現場調査期間があるため、放射能の強さが大きい場合は作業そのものが不可能になる。(2) Descent of radioactive material to the ground surface is affected by wind direction and rainfall, and so-called hot spots with a high radiation concentration may be formed. It becomes difficult. Generally, civil engineering work is carried out based on accurate surveying, and there is a corresponding field survey period until the work starts, so if the intensity of radioactivity is high, the work itself becomes impossible.
本発明の方法は加圧水を用いてこれらの問題を解決する方法を提供する。The method of the present invention provides a method for solving these problems using pressurized water.
［１］放射性物質の降下により汚染した土壌、植物、河川水、湖沼水、人工物（家や道路など）に対して、（１）微細な気泡が水中に分散した加圧水あるいは（２）微細気泡とともにナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物が分散した加圧水を用いて、混合と洗浄を行い。表土の土壌粒子や植物や河川水、湖沼水、人工物に付着した放射性物質を微細気泡表面や微細微粒子表面、微細気泡に結合した微細な浮遊物の表面に汚染物質である放射性物質を被付着物から引き離して、分離させて、加圧水の微細気泡側に吸着させ、加圧浮上設備に放射性物質ごと濁水として導いて、浮上分離し、汚染源である放射性物質を微粒子に付着した状態で加圧浮上槽表面に浮上濃縮させ、放射性物質の低減した処理水を得て、これを再び洗浄サイトに循環使用する事により広域に分散した放射性物質を浮上物に局在化する方法。[1] (1) Pressurized water in which fine bubbles are dispersed in water or (2) fine bubbles against soil, plants, river water, lake water, and man-made objects (such as houses and roads) contaminated by the fall of radioactive materials At the same time, mixing and washing are performed using pressurized water in which nano-scale natural fine soil particles, clay particles or artificial fine suspended matter are dispersed. Applying radioactive substances attached to the surface of soil particles, plants, river water, lake water, and man-made materials to the surface of fine bubbles, the surface of fine particles, and the surface of fine suspended solids combined with fine bubbles Separated from the kimono, separated, adsorbed on the microbubbles side of the pressurized water, guided to the pressurized flotation facility together with the radioactive substance as turbid water, floated and separated, and the pressurized substance floated with the radioactive substance that is the source of contamination attached to the fine particles A method of localizing radioactive substances dispersed over a wide area by levitating and concentrating on the tank surface, obtaining treated water with reduced radioactive substances, and circulating it again at the washing site.
［２］請求項１の方法により加圧水と汚染現場で混合した洗浄水にｐＨ調整剤、無機凝集剤（硫酸バンド、ＰＡＣ、塩化鉄、ポリ鉄など）と高分子凝集剤、放射性物質のシールド剤（土壌粒子、粘土粒子、ゼオライト、活性炭など）、重金属処理剤などを添加して混合する反応槽を設置して加圧浮上槽表面に濃縮させた浮遊物をスキマーとコンベアーなどの搬送手段で移動させ、脱水する事により放射性物質を局在化し濃縮する方法。[2] A pH adjuster, an inorganic flocculant (sulfuric acid band, PAC, iron chloride, polyiron, etc.), a polymer flocculant, and a radioactive material shielding agent in the washing water mixed at the site of contamination with pressurized water by the method of claim 1 (Soil particles, clay particles, zeolite, activated carbon, etc.), a reaction vessel that adds and mixes heavy metal treatment agents, etc., and moves the suspended matter concentrated on the surface of the pressurized flotation vessel using transport means such as skimmers and conveyors A method to localize and concentrate radioactive materials by dehydration.
［３］請求項２で分離された浮遊物、浮上槽から引き抜かれた浮上物を脱水分離する際に脱水分離物の放射能レベルを反応槽に設置した線量計にフィードバックし、混合するシールド剤（鉱石粉、土壌粒子、粘土粒子など）の添加量を自動制御する方法。[3] Shielding agent that feeds back and mixes the radioactivity level of the dehydrated separated substance in the reaction tank when dewatering and separating the floating substance separated in
すなわち、本発明では放射性物質が広域に拡散し、汚染が平坦地のみならず山林、丘陵などの高低差のある土地を汚染した場合に、微細気泡を含む加圧水を用いて洗浄し、ロータリースクリーン、加圧浮上装置によって洗浄水を処理して課題を解決する。That is, in the present invention, when radioactive materials are diffused in a wide area and the contamination contaminates not only flat land but also land with a height difference such as forests, hills, etc., it is cleaned using pressurized water containing fine bubbles, a rotary screen, The washing water is treated by a pressure levitation device to solve the problem.
（１）汚染地区の一区画に加圧浮上装置を設置し、加圧水の一部を汚染地区に散水し、または散水地区に新設した追加の加圧水発生装置により生成した加圧水を汚染域に散水する事。(1) Install a pressurized levitation device in one section of the contaminated area, sprinkle part of the pressurized water into the contaminated area, or spray the pressurized water generated by the additional pressurized water generator newly installed in the sprinkled area into the contaminated area. .
（２）散水地区の高低差を利用し、自然流下、あるいはポンプアップして低地の自然湖沼あるいは人工池または水槽に導水する。浮遊物が流水中に多いと予想される場合は複数の池または水槽を直列に連結してから流下水をロータリースクリーンにポンプで汲み上げる。(2) Utilize the difference in elevation of the watering area, and make a natural flow or pump up to guide the water to a natural lake or artificial pond or water tank in the lowland. If it is expected that there will be a lot of suspended matter in the running water, connect several ponds or tanks in series, and then pump the running water to the rotary screen.
（３）ロータリースクリーンでは複数のロータリースクリーンで加圧水による洗浄を行う事により、放射能汚染物質を効果的に低下させる。洗浄した枯れ葉などの浮遊物は線量を確認後に保管あるいは汚染地区に戻す。(3) In the rotary screen, radioactive contaminants are effectively reduced by washing with pressurized water using a plurality of rotary screens. Store washed or suspended matter such as dead leaves after confirmation of dose or return to contaminated areas.
（４）ロータリースクリーンの処理水は濁水となるがそのまま加圧浮上装置の反応槽へ導く。ここでｐＨ、放射線量、その他を測定して、調整したシールド剤、凝集剤、吸着剤を添加する。あるいは無添加でそのまま加圧浮上槽に流下させる。(4) The treated water of the rotary screen becomes turbid water, but is introduced as it is to the reaction tank of the pressurized flotation device. Here, pH, radiation dose, etc. are measured, and adjusted shielding agent, flocculant, and adsorbent are added. Alternatively, it is allowed to flow down to the pressure levitation tank without addition.
（５）加圧浮上装置では放射性物質を含んだ濁水は分離され、浮上物に濃縮される。浮上物の下にある流水は濁度が低下し、放射線量も低下する。(5) In the pressurized flotation device, the turbid water containing the radioactive substance is separated and concentrated to the levitated material. The running water under the floating object has lower turbidity and lower radiation dose.
（６）浮上物はスキマーに自動的にかき寄せられ、スクリューコンベアーに流下し、自動的に脱水サイトに搬送され脱水される。(6) The levitated matter is automatically attracted to the skimmer, flows down to the screw conveyor, and is automatically conveyed to the dehydration site and dehydrated.
（７）加圧浮上の処理水は処理水槽から再び洗浄現場にポンプアップして再利用される。(7) The treated water that has been floated under pressure is pumped up again from the treated water tank to the cleaning site and reused.
（８）除染作業はこの工程サイクルを繰り返し、洗浄サイトから放射性物質の量が低下するまで継続される。(8) The decontamination operation is repeated until this process cycle is repeated until the amount of radioactive material from the cleaning site decreases.
この工程でロータリースクリーンの洗浄に使われる加圧水は微細な気泡を含み洗浄対象となる浮遊物表面の微細構造に入り込み、付着した汚染物質を気液の界面に引きつけるとともに気液界面に付着したナノレベルの浮遊物がファンデルワールス力による結合力で細かな汚染物質と結合し洗浄を促進する。土壌粒子に関しても同様にこの力は働き、土粒子の微細構造であるミクロポアに入り込み洗浄する。The pressurized water used to clean the rotary screen in this process enters the fine structure of the surface of the suspended matter that contains fine bubbles and attracts the attached contaminants to the gas-liquid interface and adheres to the gas-liquid interface. Floating substances in the soil combine with fine contaminants by the binding force of van der Waals forces to promote cleaning. This force also works on soil particles, and enters and cleans the micropores that are the fine structure of the soil particles.
気泡は加圧浮上槽に回収され浮上槽の浮遊物となり、微細気泡の崩壊に伴って濃縮される。The bubbles are collected in the pressurized levitation tank and become floating matter in the levitation tank, and are concentrated as the fine bubbles collapse.
この発明により放射性物質は汚染サイトから取り除かれ、隔離保管などができる状態にすることが出来る。According to the present invention, the radioactive material can be removed from the contaminated site and put into a state where it can be isolated and stored.
この発明では加圧水を使うことにより、In this invention, by using pressurized water,
（１）加圧水の微細気泡の激しく流動する気液界面に付着する微細な土粒子、有機物などの微細粒子が放射性物質との相互作用をおこない加圧水の微細気泡上に捕捉される。(1) Fine particles such as fine earth particles and organic matter adhering to the gas-liquid interface where the fine bubbles of pressurized water flow vigorously interact with the radioactive substance and are trapped on the fine bubbles of pressurized water.
（２）放射性物質を含む加圧水は濁水の形で、下流の集水池あるいは集水井に流下する。汚染域を流下した水は集水池あるいは集水井から汲み上げられロータリースクリーンで更に加圧水で洗浄され、加圧浮上装置の反応槽に汲み上げられる。(2) Pressurized water containing radioactive material flows down to a downstream basin or well in the form of turbid water. The water flowing down the contaminated area is pumped up from the catchment pond or well, further washed with pressurized water on the rotary screen, and pumped up into the reaction tank of the pressurized flotation device.
（３）反応槽では水質によりｐＨ調整剤、凝集剤、放射線の吸着剤、シールド剤、重金属処理剤などを添加して取り扱いし易く、分離し易い性状に調整される。放射能のシールド剤は脱水分離物の放射能レベルを線量計で計測し、その結果を添加量のフィーダーの制御で調整する。(3) In the reaction tank, a pH adjuster, a flocculant, a radiation adsorbent, a shielding agent, a heavy metal treatment agent, and the like are added depending on the water quality, and the properties are adjusted to facilitate handling and separation. The radioactivity shielding agent measures the radioactivity level of the dehydrated isolate with a dosimeter and adjusts the result by controlling the feeder of the added amount.
（４）反応槽から加圧浮上槽に流入した濁水はここで浮上分離物と処理水に分離される。(4) The muddy water that has flowed from the reaction tank into the pressurized flotation tank is separated into a floating separation and treated water.
（５）浮上物は定期的にかき寄せられスクリューコンベアーに流入し脱水工程へ送られ脱水される。放射性物質は濃縮された形でこの浮上物の脱水物に含まれる。(5) The levitated matter is periodically scraped and flows into the screw conveyor and sent to the dehydration process for dehydration. Radioactive material is contained in this levitated dehydrated product in concentrated form.
（６）加圧浮上槽の処理水は加圧浮上槽の加圧水として循環しているが流入量に相当する量は再び加圧水として洗浄サイトに循環して洗浄水として使用される。(6) The treated water in the pressurized levitation tank is circulated as pressurized water in the pressurized levitation tank, but an amount corresponding to the inflow amount is again circulated to the cleaning site as pressurized water and used as cleaning water.
本発明では図１に示したフローシートの工程において放射性セシウムなどの放射性物質を微細気泡や微細気泡に吸着した微粒子表面に吸着させて浮上分離させて除去し、安全な加圧浮上処理水を得てこれを洗浄サイトに循環使用する事で以下の効果を得る。In the present invention, in the process of the flow sheet shown in FIG. 1, radioactive substances such as radioactive cesium are adsorbed on the surface of fine bubbles or fine particles adsorbed on the fine bubbles and floated and removed to obtain safe pressurized levitation treated water. The following effects can be obtained by circulating this at the cleaning site.
（１）地域の土壌環境、植生を破壊することなく広域の汚染現場を洗浄できる。(1) A wide range of contaminated sites can be washed without destroying the local soil environment and vegetation.
（２）放射性物質の浮上分離による濃縮と脱水による局在化により安全な管理下に置く。(2) Place the radioactive materials under safe control by concentration by floating separation and localization by dehydration.
（３）放射性物質を含む浮上した土粒子の脱水による廃棄物の減容化。(3) Volume reduction of waste by dehydration of floating soil particles containing radioactive materials.
（４）放射能汚染の状態にある環境水や湖沼の底質に濃縮された底質の浄化も底質を汲み上げて加圧浮上設備にかけることにより、放射性物質を浮上物として濃縮して脱水処分できる。(4) Purification of sediment concentrated in environmental water and lake sediments that are in a radioactive state is also concentrated by dewatering by concentrating radioactive substances as floating materials by pumping the sediment and applying it to pressurized flotation equipment. Can be disposed of.
具体的には、In particular,
（１）従来除染しがたかった山林の除染が可能になる。また平坦な土地や、田畑の除染作業も容易になる。(1) It becomes possible to decontaminate forests that were difficult to decontaminate in the past. Also, decontamination work on flat land and fields is easy.
（２）また本発明の施工法においては、発生する放射性廃棄物量も従来法と比べて、極端に減少する。(2) In the construction method of the present invention, the amount of radioactive waste generated is extremely reduced as compared with the conventional method.
（３）本発明ではシステムが自動運転可能な為、放射能の被爆による危険を最小限に低下させることが可能で、高度に汚染された土地でも作業員が必要以上に放射能に被爆することなく連続的に自動運転して除染できる。(3) In the present invention, since the system can be operated automatically, it is possible to reduce the danger of radiation exposure to a minimum, and workers are exposed to radiation more than necessary even in highly contaminated land. It can be decontaminated by continuous automatic operation.
図１によって本発明を説明する。高低差のある広域の放射性物質に汚染されたサイトにおいて、低地にロータリースクリーン５、加圧浮上装置７を単数あるいは複数を設置し、加圧水を一部汚染サイト（洗浄サイト）の高い位置にある加圧水の散布装置すなわち広角回転式放水設備（仮設移動型）１に送り、再度、再加圧タンク１２で加圧するか、そのまま下部の汚染サイトに放水する。The present invention will be described with reference to FIG. In a site contaminated with a wide range of radioactive materials with different elevations, one or more
散布された加圧水は気液界面が激しく流動する微細な気泡を含むため草木などの微細構造の中を洗いながら流下する。流下水４は自然の側溝をたどるほか、新たに掘削した人工的な開渠すなわち仮設した集水溝２に導かれながら放射性物質を吸着した微粒子の濁りを伴って流下する。流下水４は既存池あるいは掘削した集水池あるいは集水井３に最終的に流下してからポンプで汲み上げられ、ロータリースクリーン５で落ち葉などの大きな浮遊物を分離するがこの際も加圧水で洗浄することにより細かな土粒子を放射性物質とともに除去出来る。分離した落ち葉などは分離物受け槽５１に落下した後、洗浄したサイトに戻される。Since the sprayed pressurized water contains fine bubbles where the gas-liquid interface flows violently, it flows down while washing the fine structure such as plants. In addition to following the natural ditches, the
ロータリースクリーン５の処理水は加圧浮上槽７６の前に凝集反応槽７４に導かれ、性状によりｐＨ調整剤、凝集剤、放射能のシールド剤（鉱石粉、鉄塩、土壌、ゼオライト、粘土など）、吸着剤（活性炭、ゼオライト、粘土など）の微粒子と混合されて、加圧浮上槽７６に導かれる。The treated water of the
加圧浮上槽７６では放射性物質を含む微粒子は加圧タンク７５を用いて加圧浮上され、浮上物に濃縮されて浮上フロス槽７７に集積する。浮上物は自動的にかき寄せられスクリューコンベアーによって脱水機９にかけられて脱水ケーキＡとして排出される。In the
加圧浮上の処理水は放射性物質が取り除かれたものとなり、加圧浮上処理水の循環路Ｂを経て再利用される。過剰な加圧浮上処理水の一部は放流される。The treated water that has been floated under pressure is the one from which the radioactive material has been removed, and is reused via the circulation path B of the ground water under pressure. A part of the excess pressurized levitation treated water is discharged.
この方法は平坦地の水田や田畑にも簡単に適用可能できる。加圧水は田畑の表面を流下し、微細気泡上に放射性物質を含む微細な粒子を吸着させて流下する。その後の処理と循環は図１と同様に行われる。結果として放射性物質は浮遊物質上に局在化して、その後の処理を容易にする。This method can be easily applied to flat rice fields and fields. Pressurized water flows down the surface of the field, and adsorbs fine particles containing radioactive substances onto the fine bubbles and flows down. Subsequent processing and circulation are performed in the same manner as in FIG. As a result, the radioactive material is localized on the suspended matter, facilitating subsequent processing.
広角回転式放水設備（仮設移動型）１は丘陵や山頂付近に設置される加圧水の放水設備である。仮設した集水溝２は目標の集水池あるいは集水井３に導水する為の掘削した開渠である。ロータリースクリーン５は枯れ葉などを除去する。加圧浮上槽７６は放射性物質を含む微細な土粒子、その他の浮遊物を除去する。浮上フロス槽７７は浮上分離した浮遊物を貯槽する。処理水槽７８は加圧浮上処理水を貯槽する。加圧タンク７５は微細気泡を含む加圧水の滞留槽である。脱水機９は浮上フロスの脱水設備である。Ｂは加圧水を混入した加圧浮上処理水の循環路を示す。加圧水放射サイトプラットホーム（仮設移動型）１１には仮設する作業用設備、再加圧設備、放水設備などを置く。ロータリースクリーン５の分離物受け槽５１にたまった落ち葉などは洗浄サイトに戻す。多段洗浄により放射線量は低下している。線量測定後に除染山林へ配送し処分する。必要に応じて洗浄水のｐＨ調整を行う。A wide-angle rotary water discharge facility (temporary moving type) 1 is a water discharge facility for pressurized water installed near a hill or mountain top. Temporary
１ 広角回転式放水設備（仮設移動型） 1 Wide-angle rotating water discharge facility (temporary moving type)
２ 仮設した集水溝 2 Temporary water collecting channel
３ 集水池あるいは集水井 3 Catchment pond or catchment well
４ 流下水 4 Flowing sewage
５ ロータリースクリーン 5 Rotary screen
６ 調整槽 6 Adjustment tank
７ 加圧浮上装置 7 Pressure levitation device
８ 汚泥凝集反応槽 8 Sludge aggregation reaction tank
９ 脱水機 9 Dehydrator
１１ 加圧水放射サイトプラットホーム（仮設移動型） 11 Pressurized water radiation site platform (temporary moving type)
１２ 再加圧タンク 12 Repressurized tank
５１ 分離物受け槽 51 Separation receptacle
７１ 凝集剤自動溶解装置 71 Flocculant automatic dissolution equipment
７２ 吸着剤自動溶解装置 72 Adsorbent automatic dissolution equipment
７３ 重金属処理剤自動溶解装置 73 Automatic dissolution equipment for heavy metal processing agents
７４ 凝集反応槽 74 Coagulation reactor
７５ 加圧タンク 75 Pressurized tank
７６ 加圧浮上槽 76 Pressurized flotation tank
７７ 浮上フロス槽 77 Levitation floss tank
７８ 処理水槽 78 Treated water tank
Ａ 脱水ケーキ A dehydrated cake
Ｂ 加圧浮上処理水の循環路（仮設管路） B Pressure levitation treatment water circulation (temporary pipeline)
Claims (3)
放射性物質の拡散により汚染した汚染域に対して、（１）微細な気泡が水中に分散した加圧水あるいは（２）微細な気泡とともにナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物が分散した加圧水を散水して混合と洗浄を行い、汚染物質である放射性物質を前記汚染域の被付着物質から引き離して、分離させて、加圧水の微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物に吸着させる工程と、
前記放射性物質が吸着した微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物が分散した加圧水である濁水を加圧浮上装置に導く工程と、
前記放射性物質が吸着した微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物を放射性物質が付着した状態で、加圧浮上装置の加圧浮上槽の表面に浮上濃縮させ、前記濁水から浮上物と放射性物質の低減した処理水を分離する工程と、
前記処理水を加圧水の生成に再利用する工程と
を有する前記方法。 A method for removing radioactive material diffused over a wide area,
For contaminated areas contaminated by the diffusion of radioactive materials: (1) Pressurized water in which fine bubbles are dispersed in water or (2) Nano-scale natural fine soil particles, clay particles or artificial fine particles together with fine bubbles Mixing and washing by spraying pressurized water in which suspended substances are dispersed , separating radioactive materials as contaminants from the adherent in the contaminated area, separating them, fine bubbles of pressurized water, nano-level natural fines A process of adsorbing to a simple soil particle, clay particle or artificial fine suspended matter ,
A step of introducing turbid water, which is pressurized water in which fine bubbles adsorbed by the radioactive substance , nano-scale natural fine soil particles, clay particles or artificial fine suspended matters are dispersed, to a pressurized levitation device ;
The radioactive fine bubbles substance is adsorbed, natural fine soil particles in nano-level, a fine suspension of clay particles or artificially in a state in which radioactive material is attached on the surface of the upper floatation tank on floatation device A step of floating and concentrating, and separating the suspended matter and the treated water with reduced radioactive substances from the muddy water ;
Recycling the treated water to generate pressurized water .
放射性物質の拡散により汚染した汚染域に対して、（１）微細な気泡が水中に分散した加圧水あるいは（２）微細な気泡とともにナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物が分散した加圧水を散水して混合と洗浄を行い、汚染物質である放射性物質を前記汚染域の被付着物質から引き離して、分離させて、加圧水の微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物に吸着させる工程と、
前記放射性物質が吸着した微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物が分散した加圧水である濁水を加圧浮上装置の凝集反応槽に導く工程と、
前記凝集反応槽で前記導いた濁水に水質に応じてｐＨ調整剤、凝集剤、放射線の吸着剤、放射性物質のシールド剤あるいは重金属処理剤を添加する工程と、
前記放射性物質が吸着した微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物を放射性物質が付着した状態で、加圧浮上装置の加圧浮上槽の表面に浮上濃縮させ、前記添加された濁水から浮上物と放射性物質の低減した処理水を分離する工程と、
前記処理水を加圧水の生成に再利用する工程と
を有する前記方法。 A method for removing radioactive material diffused over a wide area,
For contaminated areas contaminated by the diffusion of radioactive materials: (1) Pressurized water in which fine bubbles are dispersed in water or (2) Nano-scale natural fine soil particles, clay particles or artificial fine particles together with fine bubbles Mixing and washing by spraying pressurized water in which suspended substances are dispersed , separating radioactive materials as contaminants from the adherent in the contaminated area, separating them, fine bubbles of pressurized water, nano-level natural fines A process of adsorbing to a simple soil particle, clay particle or artificial fine suspended matter ,
A step of introducing turbid water, which is pressurized water in which fine bubbles adsorbed by the radioactive substance , nano-scale natural fine soil particles, clay particles or artificial fine suspended matters are dispersed, to a coagulation reaction tank of a pressurized flotation device ;
Adding a pH adjuster, a flocculant, a radiation adsorbent, a radioactive shielding agent or a heavy metal treating agent to the turbid water introduced in the agglomeration reaction tank according to the water quality;
The surface of the pressurized levitation tank of the pressurized levitation device with the radioactive substance adhering to the fine bubbles adsorbed by the radioactive substance, the natural fine soil particles at the nano level, the clay particles or the artificial fine suspended matter. Levitation concentration, and separating the levitated material and the treated water with reduced radioactive substances from the added turbid water ;
Recycling the treated water to generate pressurized water .
放射性物質の拡散により汚染した汚染域に対して、（１）微細な気泡が水中に分散した加圧水あるいは（２）微細な気泡とともにナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物が分散した加圧水を散水して混合と洗浄を行い、汚染物質である放射性物質を前記汚染域の被付着物質から引き離して、分離させて、加圧水の微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物に吸着させる工程と、
前記放射性物質が吸着した微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物が分散した加圧水である濁水を加圧浮上装置の凝集反応槽に導く工程と、
前記凝集反応槽で前記導いた濁水に水質に応じてｐＨ調整剤、無機凝集剤、高分子凝集剤、放射性物質のシールド剤あるいは重金属処理剤を添加する工程と、
前記放射性物質が吸着した微細な気泡、ナノレベルの自然の微細な土粒子、粘土粒子あるいは人工の微細な浮遊物を放射性物質が付着した状態で、加圧浮上装置の加圧浮上槽の表面に浮上濃縮させ、前記添加された濁水から浮上物と放射性物質の低減した処理水を分離する工程と、
前記分離した浮上物を脱水する工程と、
前記処理水を加圧水の生成に再利用する工程と
を有する前記方法。 A method for removing radioactive material diffused over a wide area,
For contaminated areas contaminated by the diffusion of radioactive materials: (1) Pressurized water in which fine bubbles are dispersed in water or (2) Nano-scale natural fine soil particles, clay particles or artificial fine particles together with fine bubbles Mixing and washing by spraying pressurized water in which suspended substances are dispersed , separating radioactive materials as contaminants from the adherent in the contaminated area, separating them, fine bubbles of pressurized water, nano-level natural fines A process of adsorbing to a simple soil particle, clay particle or artificial fine suspended matter ,
A step of introducing turbid water, which is pressurized water in which fine bubbles adsorbed by the radioactive substance , nano-scale natural fine soil particles, clay particles or artificial fine suspended matters are dispersed, to a coagulation reaction tank of a pressurized flotation device ;
Adding a pH adjuster, an inorganic flocculant, a polymer flocculant, a radioactive shielding agent or a heavy metal treating agent to the turbid water introduced in the agglomeration reaction tank according to the water quality;
The surface of the pressurized levitation tank of the pressurized levitation device with the radioactive substance adhering to the fine bubbles adsorbed by the radioactive substance, the natural fine soil particles at the nano level, the clay particles or the artificial fine suspended matter. Levitation concentration, and separating the levitated material and the treated water with reduced radioactive substances from the added turbid water ;
Dehydrating the separated levitated matter;
Recycling the treated water to produce pressurized water.
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