As part of planning for waste minimization, decontamination foam has been considered as a potential application for the cleaning of radioactive contaminant. In this study, we synthesized silica particles to improve foam stability by varying synthesis parameters. Cetyltrimethylammonium bromide (CTAB) was found to influence the stability of the decontamination foam. The reason was that higher interaction between SiO2 nanoparticles and surfactant at the air-water interface in aqueous solution is beneficial for foam stability. CTAB can also be used as an additive for the aggregation of silica nanoparticles. In the separation of SiO2 nanoparticles, CTAB plays a critical role in the nanoparticles flocculation because of the charge neutralization and hydrophobic effects of its hydrocarbon tails.

1. Introduction
 2. Experimental
 3. Results and discussion
 4. Conclusion
 REFERENCES

• Mansoo Choi(Korea Atomic Energy Research Institute) | 최만수
• Seung-Eun Kim(Korea Atomic Energy Research Institute) | 김승은
• In-Ho Yoon(Korea Atomic Energy Research Institute) | 윤인호
• Chong-Hun Jung(Korea Atomic Energy Research Institute) | 정종헌
• Wang-Kyu Choi(Korea Atomic Energy Research Institute) | 최왕규
• Jei-Kwon Moon(Korea Atomic Energy Research Institute) | 문제권
• Seon-Byeong Kim(Korea Atomic Energy Research Institute) | 김선병 Corresponding Author