JP7130119B2 - 陽イオン性磁性ナノ粒子を用いた土壌内の微細粒子の分離方法 - Google Patents
陽イオン性磁性ナノ粒子を用いた土壌内の微細粒子の分離方法 Download PDFInfo
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Description
Claims (12)
- 磁性ナノ粒子と陽イオン性物質を、陽イオン性物質/磁性ナノ粒子(w/w)=0.04~1の割合を以って混合して、ゼータ電位が20~40mVの範囲となるように陽イオン性磁性ナノ粒子複合体を製造するステップ(ステップa);
前記複合体を汚染土壌と混合して、粘土又はシルトを含む-50~-20mVの範囲の陰電荷を示す微細粒子と、前記複合体を静電気的引力により結合させるステップ(ステップb);及び
その後、磁力選別するか、篩選別及び磁力選別を順次に実行するステップ(ステップc)を含むことを特徴とする、土壌内の微細粒子の分離方法。 - 前記磁性ナノ粒子は、共沈、水熱合成、溶液合成又はゾルゲル方法により製造されることを特徴とする、請求項1に記載の土壌内の微細粒子の分離方法。
- 前記磁性ナノ粒子は、酸化鉄ナノ粒子であることを特徴とする、請求項1に記載の土壌内の微細粒子の分離方法。
- 前記陽イオン性物質は、ポリエチレンイミン、ポリ(ジアリルジメチルアンモニウムクロリド)及び(3-アミノプロピル)トリエトキシシランからなる群より選択される一つ以上を含むことを特徴とする、請求項1に記載の土壌内の微細粒子の分離方法。
- 前記汚染土壌は、重金属又は放射性核種の二つのうち一つ以上を含むことを特徴とする、請求項1に記載の土壌内の微細粒子の分離方法。
- 前記ステップcで、篩選別及び磁力選別の順次実行は、篩を境界として撹拌が行われる第1セル及び磁力部が具備された第2セルに区画された選別装置により行われるものであって、前記第1セルに投入されたステップbが行われた汚染土壌のうち、篩を通過した粒子が磁力により選別されることを特徴とする、請求項1に記載の土壌内の微細粒子の分離方法。
- 前記ステップcで、篩選別及び磁力選別(第1選別)の順次実行後、篩選別及び磁力選別(第2選別)を追加で実行するステップをさらに含むが、第2選別で用いられる篩のメッシュサイズは、第1選別で用いられる篩のメッシュサイズより小さいことを特徴とする、請求項1に記載の土壌内の微細粒子の分離方法。
- 前記ステップc以後、磁力を通じて分離された磁性を有する粒子を廃棄物として処理するステップをさらに含むことを特徴とする、請求項1に記載の土壌内の微細粒子の分離方法。
- 磁性ナノ粒子が陽イオン性物質でコーティングされた陽イオン性磁性ナノ粒子複合体を含み、
前記陽イオン性磁性ナノ粒子複合体は、前記磁性ナノ粒子及び前記陽イオン性物質を、陽イオン性物質/磁性ナノ粒子(w/w)=0.04~1の割合を以って含み、前記陽イオン性磁性ナノ粒子複合体のゼータ電位は20~40mVの範囲に制御される
ことを特徴とする、微細土壌内の放射性核種吸着除去剤。 - 磁性ナノ粒子が陽イオン性物質でコーティングされた陽イオン性磁性ナノ粒子複合体を含み、
前記陽イオン性磁性ナノ粒子複合体は、前記磁性ナノ粒子及び前記陽イオン性物質を、陽イオン性物質/磁性ナノ粒子(w/w)=0.04~1の割合を以って含み、前記陽イオン性磁性ナノ粒子複合体のゼータ電位は20~40mVの範囲に制御される
ことを特徴とする、微細土壌内の重金属吸着除去剤。 - 磁力部と篩が結合された汚染土壌内の微細粒子分離装置であって、
前記分離装置は、篩を境界として撹拌が実行される第1セル及び磁力部が具備された第2セルに区画された第1選別装置を具備し、前記選別装置の第1セルに投入される陽イオン性磁性ナノ粒子複合体と混合された汚染土壌のうち篩を通過した粒子を磁性により選別し、
前記陽イオン性磁性ナノ粒子複合体は、磁性ナノ粒子及び陽イオン性物質を、陽イオン性物質/磁性ナノ粒子(w/w)=0.04~1の割合を以って含み、前記陽イオン性磁性ナノ粒子複合体のゼータ電位が20~40mVの範囲に制御されることによって、前記陽イオン性磁性ナノ粒子複合体は前記汚染土壌内の-50~-20mVの範囲の陰電荷を示す微細粒子と結合するように構成される
ことを特徴とする、汚染土壌内の微細粒子分離装置。 - 前記分離装置は、篩を境界として撹拌が実行される第1セル及び磁力部が具備された第2セルに区画された第2選別装置がさらに具備され、
第2選別装置に具備される篩のメッシュサイズは、第1選別装置に具備される篩のメッシュサイズより小さいことを特徴とする、請求項11に記載の分離装置。
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