JP6083591B2 - 放射性セシウム汚染土壌の分級・洗浄効果を向上させる除染方法 - Google Patents
放射性セシウム汚染土壌の分級・洗浄効果を向上させる除染方法 Download PDFInfo
- Publication number
- JP6083591B2 JP6083591B2 JP2012140943A JP2012140943A JP6083591B2 JP 6083591 B2 JP6083591 B2 JP 6083591B2 JP 2012140943 A JP2012140943 A JP 2012140943A JP 2012140943 A JP2012140943 A JP 2012140943A JP 6083591 B2 JP6083591 B2 JP 6083591B2
- Authority
- JP
- Japan
- Prior art keywords
- soil
- polyion
- aqueous solution
- classification
- decontamination method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002689 soil Substances 0.000 title claims description 123
- 230000002285 radioactive effect Effects 0.000 title claims description 24
- 229910052792 caesium Inorganic materials 0.000 title claims description 21
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 title claims description 21
- 238000005202 decontamination Methods 0.000 title claims description 18
- 238000004140 cleaning Methods 0.000 title description 20
- 230000000694 effects Effects 0.000 title description 16
- 229920000831 ionic polymer Polymers 0.000 claims description 56
- 239000010419 fine particle Substances 0.000 claims description 39
- 239000007864 aqueous solution Substances 0.000 claims description 24
- 229920000642 polymer Polymers 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 15
- 235000002639 sodium chloride Nutrition 0.000 claims description 15
- 229920000447 polyanionic polymer Polymers 0.000 claims description 14
- 150000003839 salts Chemical class 0.000 claims description 11
- 239000002901 radioactive waste Substances 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 4
- 229920002678 cellulose Polymers 0.000 claims description 4
- 239000001913 cellulose Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 125000003277 amino group Chemical group 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- 229920006319 cationized starch Polymers 0.000 claims description 3
- 229920005610 lignin Polymers 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 3
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 3
- 235000011151 potassium sulphates Nutrition 0.000 claims description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 3
- -1 carboxymethylamylose Polymers 0.000 claims description 2
- 229920002851 polycationic polymer Polymers 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims 1
- 235000019270 ammonium chloride Nutrition 0.000 claims 1
- 229910001629 magnesium chloride Inorganic materials 0.000 claims 1
- 235000011147 magnesium chloride Nutrition 0.000 claims 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims 1
- 235000019341 magnesium sulphate Nutrition 0.000 claims 1
- 229910052938 sodium sulfate Inorganic materials 0.000 claims 1
- 235000011152 sodium sulphate Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 description 20
- 238000005406 washing Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000002699 waste material Substances 0.000 description 11
- 239000011362 coarse particle Substances 0.000 description 10
- 230000003588 decontaminative effect Effects 0.000 description 9
- 229920002689 polyvinyl acetate Polymers 0.000 description 7
- 239000011118 polyvinyl acetate Substances 0.000 description 7
- 230000004931 aggregating effect Effects 0.000 description 6
- 239000004927 clay Substances 0.000 description 6
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 229920000856 Amylose Polymers 0.000 description 1
- 241001275944 Misgurnus anguillicaudatus Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Description
[実施例1]
剥離した表土を減容する目的で分級・洗浄を行う際、土壌処理剤が分級・洗浄に与える影響を把握する必要がある。そこで、ポリイオンで処理した土壌と未処理の土壌について、同一の方法で分級・洗浄を行い、その効果を比較した。
ポリ酢酸ビニルのような分子性ポリマーは、ポリイオンよりも短い時間で土壌を乾燥・固化できる利点を持ち、短期間で汚染土壌を除染(表土を除去)する場合には有効である。そこで、ポリ酢酸ビニルの懸濁液についても、ポリイオン処理を行った土壌に近接した1m四方の土壌に散布し、乾燥を待って剥ぎ取った後、実施例1に示すのと同じ要領で分級・洗浄を行った。ただし、ポリ酢酸ビニルで処理した土壌は、固化したポリ酢酸ビニルを水で軟化するのに若干の時間を要するため、処理土壌を6時間、水に浸した後、分級・洗浄を行った。ポリ酢酸ビニルで処理した飯舘村飯樋の畑土壌の分級・洗浄の結果を表3に示す。
Claims (5)
- 放射性セシウムにより汚染された土壌にポリイオン水溶液を散布して、土壌中でポリイオンをゲル化させた後、土壌表層を剥がして、大粒の土壌粒子表面に付着している微細粒子を洗い出し、放射性セシウムが吸着・固定されている微細粒子を凝集させて大粒の粒子の表面への再付着を防止しながら分級・洗浄し、分級サイズが0.075mm未満の微細粒子分画を放射性廃棄土壌とする、放射性セシウム汚染土壌の除染方法。
- 前記ポリイオン水溶液は、
カチオン化セルロース、カチオン化でんぷん、アミノ基を有するポリマーもしくは4級アンモニウム塩のポリマーから選択されるポリ陽イオンを含む水溶液;
カルボキシメチルセルロース、カルボキシメチルアミロース、リグニンスルホン酸およびその塩、ポリアクリル酸およびその塩、ポリスルホン酸およびその塩から選択されるポリ陰イオンを含む水溶液、もしくは
ポリ陽イオンとポリ陰イオンとを含む水溶液である、請求項1に記載の除染方法。 - 前記ポリイオン水溶液は、ポリ陽イオン及び/又はポリ陰イオンを1〜6wt%含む水溶液である、請求項2に記載の除染方法。
- 前記ポリイオン水溶液は、ゲル状のポリイオン複合体を生じていない、請求項2又は3に記載の除染方法。
- 前記ポリイオン水溶液は、ポリ陽イオンとポリ陰イオンの両方を含む場合には、塩化ナトリウム、塩化カリウム、塩化アンモニウム、塩化マグネシウム、硫酸ナトリウム、硫酸カリウム、硫酸アンモニウム、硫酸マグネシウムから選択される塩をさらに含む、請求項4に記載の除染方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012140943A JP6083591B2 (ja) | 2012-06-22 | 2012-06-22 | 放射性セシウム汚染土壌の分級・洗浄効果を向上させる除染方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012140943A JP6083591B2 (ja) | 2012-06-22 | 2012-06-22 | 放射性セシウム汚染土壌の分級・洗浄効果を向上させる除染方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2014006111A JP2014006111A (ja) | 2014-01-16 |
JP6083591B2 true JP6083591B2 (ja) | 2017-02-22 |
Family
ID=50103967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012140943A Active JP6083591B2 (ja) | 2012-06-22 | 2012-06-22 | 放射性セシウム汚染土壌の分級・洗浄効果を向上させる除染方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP6083591B2 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101570948B1 (ko) | 2011-12-28 | 2015-11-20 | 다이니치 세이카 고교 가부시키가이샤 | 방사성 세슘의 제거방법, 방사성 세슘 제거용의 친수성 수지 조성물, 방사성 요오드 및 방사성 세슘의 제거방법, 및 방사성 요오드 및 방사성 세슘 제거용의 친수성 수지 조성물 |
JP6532053B2 (ja) * | 2014-04-02 | 2019-06-19 | 国立大学法人茨城大学 | 土壌固化剤並びに該土壌固化剤を用いた放射性物質の汚染拡大方法と汚染土壌の除染方法及び植生基盤造成方法 |
JP6770821B2 (ja) * | 2016-04-01 | 2020-10-21 | 株式会社オメガ | 汚染土壌の浄化方法 |
CN114130806B (zh) * | 2021-11-30 | 2023-01-10 | 中国原子能科学研究院 | 一种放射性污染土壤清洗去污*** |
CN114029327B (zh) * | 2021-11-30 | 2023-03-24 | 中国原子能科学研究院 | 一种放射性污染土壤清洗去污的方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6168546B2 (ja) * | 2012-03-15 | 2017-07-26 | 国立大学法人茨城大学 | 水溶性又は水分散性高分子を利用した放射性物質含有土壌の固定化溶液及び該固定化溶液を用いた放射性物質除染方法 |
-
2012
- 2012-06-22 JP JP2012140943A patent/JP6083591B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
JP2014006111A (ja) | 2014-01-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6083591B2 (ja) | 放射性セシウム汚染土壌の分級・洗浄効果を向上させる除染方法 | |
Vincent et al. | Thallium (I) sorption using Prussian blue immobilized in alginate capsules | |
JP5647371B1 (ja) | 汚染土壌の無害化処理方法 | |
Mallampati et al. | Preferential removal and immobilization of stable and radioactive cesium in contaminated fly ash with nanometallic Ca/CaO methanol suspension | |
JP2013178221A (ja) | 放射性物質に汚染された固形物の除染装置および除染方法 | |
JP2013160666A (ja) | 放射性セシウムを含有する焼却灰の安全な処分方法 | |
JP5911716B2 (ja) | 汚染土壌対策用の処理剤と処理方法 | |
JP2013103206A (ja) | 汚染土壌の浄化方法 | |
Suzuki et al. | Immobilization of fluoride in artificially contaminated kaolinite by the addition of commercial-grade magnesium oxide | |
JP2006255515A (ja) | 重金属汚染土壌の浄化方法 | |
JP5683633B2 (ja) | 放射性物質汚染物の処理方法及び処理装置 | |
JP2012242254A (ja) | 汚染土壌の原位置浄化方法 | |
JP2015117989A (ja) | 放射性物質の除染処理方法 | |
JP2013185941A (ja) | 放射性セシウム汚染土壌の除染方法 | |
JP6795939B2 (ja) | 汚染土壌再生材 | |
JP2015071166A5 (ja) | ||
JP6105363B2 (ja) | 汚染物質の除去方法および磁性除染剤の製造方法 | |
JP6137887B2 (ja) | 放射性物質を含む土壌の除染方法 | |
JP2012237658A (ja) | 汚染土壌の浄化方法 | |
JP2016097351A (ja) | ヒ素を含む泥水の浄化方法及び浄化装置 | |
KR101579795B1 (ko) | 고정화된 견운모를 이용한 세슘 제거방법 | |
JP6476552B2 (ja) | 陽イオン分離方法 | |
Yamashita et al. | Decontamination and volume reduction of cesium-contaminated soil by combining soil solidification with interpolyelectrolyte complex and wet classification | |
JP5362926B1 (ja) | 放射性物質による汚染土壌の除染法 | |
JP2005144341A (ja) | 土壌中の砒素及び鉛の不溶化処理方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20150513 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20160126 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20160803 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20160927 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20161214 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20170112 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6083591 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |