| 학회 |
한국재료학회 |
| 학술대회 |
2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 |
23권 2호 |
| 발표분야 |
4. 유해화학물질 대응 최적방제기술 및 시뮬레이션(Optimal mitigation technology and simulation for hazardous chemicals) |
| 제목 |
안전하고 범용적인 유해화합물 유출 방재제로써의 거대다공성 질석 Macroporous vermiculite as a risk-free and general-purpose sorbent for hazardous spillages |
| 초록 |
In this talk, we will introduce expanded vermiculite as a reliable sorbent for hazardous liquid spillages even with accompanying fire and explosion risks. The expanded vermiculite samples were prepared by means of different processes based on rapid heating and chemical treatments, and characterized by various material analysis methods. Their capabilities for hazard cleanup were correlated with structural characteristics of macroporous vermiculite. The more intensive expansion with a high pore volume was confirmed to have good sorption performance. The expansion was explained with the exfoliation induced by the evaporation of interlayer water within the mosaic-like intergrown structure. When using optimized thermally expanded vermiculite, the sorption capacities of 1.5 – 3.0 g/g were obtained for various hazardous chemicals including hydrophilic/hydrophobic organic solvents and strong acidic/basic solutions. These values strongly depended on physical properties such as pore volume of the sorbent and density of the absorbed liquid rather than their chemical nature. The narrow channel interconnected by intra/interparticle pores worked as an imbibing pathway due to the capillarity, resulting in the rapid, spontaneous absorption of hazardous chemicals. The removal efficiency of the optimized sample was greater than 94 wt% for all the tested hazards for 10 min. These results demonstrate that the expanded vermiculite with excellent thermal and chemical stability is a reliable sorbent for hazard cleanup under harsh conditions. |
| 저자 |
김용신, Nguyen Duc Cuong
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| 소속 |
한양대(ERICA) |
| 키워드 |
Expanded vermiculite; Sorbent; Mitigation of hazardous spillages
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| E-Mail |
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