JP2017166948A - 放射性ストロンチウム汚染土壌の処理方法及び処理装置 - Google Patents
放射性ストロンチウム汚染土壌の処理方法及び処理装置 Download PDFInfo
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- JP2017166948A JP2017166948A JP2016051975A JP2016051975A JP2017166948A JP 2017166948 A JP2017166948 A JP 2017166948A JP 2016051975 A JP2016051975 A JP 2016051975A JP 2016051975 A JP2016051975 A JP 2016051975A JP 2017166948 A JP2017166948 A JP 2017166948A
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- soil
- strontium
- heat
- contaminated soil
- radioactive strontium
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- 239000002689 soil Substances 0.000 title claims abstract description 128
- 238000012545 processing Methods 0.000 title abstract description 8
- 238000003672 processing method Methods 0.000 title abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 229910052712 strontium Inorganic materials 0.000 claims description 52
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 52
- 230000002285 radioactive effect Effects 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 26
- 238000000465 moulding Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000011362 coarse particle Substances 0.000 claims 1
- 238000001035 drying Methods 0.000 description 12
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 12
- 238000001179 sorption measurement Methods 0.000 description 10
- 238000010828 elution Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- 239000003463 adsorbent Substances 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 229910003668 SrAl Inorganic materials 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000010332 dry classification Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 229910052865 lawsonite Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
Description
本実施例では、熱処理前後の、土壌からのストロンチウム(Sr)溶出濃度の比較を行った。先ず、0.5Mの硝酸ストロンチウム溶液に土壌(乾式ふるい法でふるい分けした粒径2mm以下の土壌、ケイ素/アルミニウム(質量比)は3程度)を浸漬し、その後、浸漬液をろ過して、模擬ストロンチウム汚染土壌を作成した。次いで、この模擬ストロンチウム汚染土壌を60℃で24時間乾燥した後、電気炉内で昇温速度20℃/minで加熱し、加熱温度とした後、1時間保持して熱処理した土壌を得た。加熱温度は、350℃及び1100℃について行った。
Claims (7)
- 放射性ストロンチウムを含有する土壌を分級する分級工程と、
分級された前記土壌を熱処理する熱処理工程と
を備えることを特徴とする放射性ストロンチウム汚染土壌の処理方法。 - 前記熱処理工程において、前記土壌を1000℃以上で熱処理することを特徴とする請求項1記載の放射性ストロンチウム汚染土壌の処理方法。
- 前記熱処理工程において、前記土壌に含まれるストロンチウムは、スローソン石を生成することを特徴とする請求項2記載の放射性ストロンチウム汚染土壌の処理方法。
- 前記分級工程において、前記土壌に含有された、粒径が2mmを超える粗大粒子を除去することを特徴とする請求項1乃至3のいずれか1項記載の放射性ストロンチウム汚染土壌の処理方法。
- 分級された前記土壌をプレス成形する成形工程を備え、プレス成形された前記土壌を前記熱処理工程で熱処理することを特徴とする請求項1乃至4のいずれか1項記載の放射性ストロンチウム汚染土壌の処理方法。
- 前記土壌に放射性ストロンチウムを吸着させることを特徴とする請求項1乃至5のいずれか1項記載の放射性ストロンチウム汚染土壌の処理方法。
- 放射性ストロンチウムを含有する土壌を分級する分級装置と、
分級された前記土壌を熱処理する熱処理装置と
を備えることを特徴とする放射性ストロンチウム汚染土壌の処理装置。
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Cited By (1)
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KR102678300B1 (ko) * | 2021-11-29 | 2024-06-25 | 한국원자력연구원 | 방사성 토양 소결체 및 이의 처리방법 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5237700A (en) * | 1975-09-18 | 1977-03-23 | Univ Tohoku | Treating system of radioactive waste fluid by zeolite |
EP2361891A1 (en) * | 2010-02-16 | 2011-08-31 | Instytut Chemii i Techniki Jadrowej | Method of disposal of radioactive waste in silica glass |
JP2013113762A (ja) * | 2011-11-30 | 2013-06-10 | Kanto Kanzai:Kk | 高濃度放射性物質によって汚染した土壌及び汚泥等の封じ込め処理法 |
JP2013178131A (ja) * | 2012-02-28 | 2013-09-09 | Hitachi Ltd | 土壌中の放射性物質の除去方法 |
JP2015014571A (ja) * | 2013-07-08 | 2015-01-22 | 株式会社東芝 | 放射性廃棄物固化装置、放射性廃棄物固化体の固化処理方法、および、放射性廃棄物固化体の製造方法 |
JP2016023995A (ja) * | 2014-07-17 | 2016-02-08 | 吉澤石灰工業株式会社 | 放射性セシウムで汚染された表土中の放射性セシウムを固定する方法 |
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- 2016-03-16 JP JP2016051975A patent/JP2017166948A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5237700A (en) * | 1975-09-18 | 1977-03-23 | Univ Tohoku | Treating system of radioactive waste fluid by zeolite |
EP2361891A1 (en) * | 2010-02-16 | 2011-08-31 | Instytut Chemii i Techniki Jadrowej | Method of disposal of radioactive waste in silica glass |
JP2013113762A (ja) * | 2011-11-30 | 2013-06-10 | Kanto Kanzai:Kk | 高濃度放射性物質によって汚染した土壌及び汚泥等の封じ込め処理法 |
JP2013178131A (ja) * | 2012-02-28 | 2013-09-09 | Hitachi Ltd | 土壌中の放射性物質の除去方法 |
JP2015014571A (ja) * | 2013-07-08 | 2015-01-22 | 株式会社東芝 | 放射性廃棄物固化装置、放射性廃棄物固化体の固化処理方法、および、放射性廃棄物固化体の製造方法 |
JP2016023995A (ja) * | 2014-07-17 | 2016-02-08 | 吉澤石灰工業株式会社 | 放射性セシウムで汚染された表土中の放射性セシウムを固定する方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102678300B1 (ko) * | 2021-11-29 | 2024-06-25 | 한국원자력연구원 | 방사성 토양 소결체 및 이의 처리방법 |
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