KR20200065784A - 세슘 이온 흡착제, 이의 제조방법 및 이를 이용한 세슘 이온 제거 방법 - Google Patents
세슘 이온 흡착제, 이의 제조방법 및 이를 이용한 세슘 이온 제거 방법 Download PDFInfo
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Abstract
Description
도 2a 는 습식 알칼리 금속염 수용액 방사를 통해 얻은 탄소섬유의 모습 (왼쪽)이며, 이를 Energy Dispersive Spectroscopy Mapping 으로 관찰한 것으로, 탄소와 산소 그리고 소디윰으로 이루어져 있는 섬유표면 (오른쪽)을 나타낸 것이다.
또한, 도 2b는 Scanning Electron Microscope (전자현미경) 으로 관찰한 것으로서, 2차원 구조의 산화 그래핀 (Graphene Oxide) 이 촘촘히 엮여 고형화가 되어있는 형태의 탄소 섬유의 모습을 나타낸 것이다.
도 3a 내지 3c은 합성된 탄소섬유의 화학구조를 보여주는 X-ray Photoelectron Spectroscopy (XPS)분석결과이다.
도 4a 내지 4c는 합성된 탄소섬유의 세슘 이온 흡착 실험결과를 나타낸 그래프이다.
| Qe | Ci | Kd | t | |
| mg·g-1 | ppm | mL·g-1 | h | |
| GO-membrane on CaF2 a | 148.0 | 87.3 | - | 0.5~32 |
| PSMGPBb | 213.9 | 177300 | 5.0*104 | 24 |
| PB NPc | 127.7 | 13300 | 1.00*10 | 6 |
| PAN-KNiCFd | 110.3 | 20~240 | 1.46*105 | 24 |
| iron ferrite | 111.72 | 133~13300 | 8.15*102 | 24 |
| Na-GO fiber | 150-200 | 100 | 1.64*103 | 0.2 |
| Qe= equilibrium adsorption capacity. Ci = initial Cs+ concentration. Cf = final concentration. E = removal efficiency. t = sorption saturation time aCaF2 supported by graphene oxide membrane. bpectin-stabilized magnetic graphene oxide Prussian blue nanocomposites. cPrussian-Blue nano particle. dPAN-based potassium nickel hexacyanoferrate (II) composite spheres. eMagnetic iron ferrite composite. |
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Claims (9)
- COO-M+로 표시되는 친수성기를 가지는 산화 그래핀 복합체;을 포함하고,
상기 M은 H, Li, Na, K, Rb 또는 4차 아민인, 세슘 이온 흡착제.
- 제1항에 있어서,
상기 M의 함량은 상기 산화 그래핀 복합체 전체 중량을 기준으로 1 내지 20 중량%인 것을 특징으로 하는, 세슘 이온 흡착제.
- 제1항에 있어서,
상기 세슘 이온 흡착제는 직경 100 내지 500 ㎛의 산화 그래핀 섬유인 것을 특징으로 하는, 세슘 이온 흡착제.
- 제1항에 있어서,
상기 산화 그래핀 복합체는 2차원의 다층 구조인 것을 특징으로 하는, 세슘 이온 흡착제.
- 제1항 내지 제4항 중 어느 한 항에 따른 세슘 이온 흡착제의 제조방법으로서,
산화 그래핀을 합성하는 단계; 및
상기 산화 그래핀을 M+OH-로 표시되는 염을 포함하는 용액에 습식 방사하여 산화 그래핀 복합체를 합성하는 단계;를 포함하는 세슘 이온 흡착제의 제조방법.
(상기 M은 H, Li, Na, K, Rb 또는 4차 아민이다)
- 제1항 내지 제4항 중 어느 한 항에 따른 세슘 이온 흡착제를 이용하여, 세슘 이온을 제거하는 단계;를 포함하는, 세슘 이온 제거 방법.
- 제6항에 있어서,
상기 세슘 이온을 제거하는 단계는 수용액 상에서 이루어지는 것을 특징으로 하는, 세슘 이온 제거 방법.
- 제6항에 있어서,
상기 세슘 이온 제거 방법은,
상기 세슘 이온 흡착제를 M+OH-로 표시되는 수용액에 담지하여 재생하는 단계;를 더 포함하는 것을 특징으로 하는, 세슘 이온 제거 방법.
(상기 M은 H, Li, Na, K, Rb 또는 4차 아민이다.)
- 제6항에 있어서,
상기 세슘 이온 제거 방법은, 초기 농도 100 ppm을 기준으로, 10분 내에 160mg/g에 도달하는 것을 특징으로 하는, 세슘 이온 제거 방법.
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