Center for Environment, Health, and Welfare Research, Korea Institute of Science and Technology (KIST) , Seoul 02792, Republic of Korea.
Department of Chemical Engineering, University of Seoul , Seoul 02504, Republic of Korea.
Environ Sci Technol. 2017 Oct 17;51(20):11967-11975. doi: 10.1021/acs.est.7b02884. Epub 2017 Oct 4.
Filtration technology has been widely studied due to concerns about exposure to airborne dust, including metal oxide nanoparticles, which cause serious health problems. The aim of these studies has been to develop mechanisms for the continuous and efficient removal of metal oxide dusts. In this study, we introduce a novel air filtration system based on the magnetic attraction force. The filtration system is composed of a magnetic nanoparticle (MNP)-decorated nanofiber (MNP-NF) filter. Using a simple electrospinning system, we fabricated continuous and smooth electrospun nanofibers with evenly distributed FeO MNPs. Our electrospun MNP-NF filter exhibited high particle collection efficiency (∼97% at 300 nm particle size) compared to the control filter (w/o MNPs, ∼ 68%), with a ∼ 64% lower pressure drop (∼17 Pa) than the control filter (∼27 Pa). Finally, the filter quality factors of the MNP-NF filter were 4.7 and 11.9 times larger than those of the control filter and the conventional high-efficiency particulate air filters (>99% and ∼269 Pa), respectively. Furthermore, we successfully performed a field test of our MNP-NF filter using dust from a subway station tunnel. This work suggests that our novel MNP-NF filter can be used to facilitate effective protection against hazardous metal oxide dust in real environments.
由于担心暴露于空气中的灰尘（包括金属氧化物纳米颗粒）会引发严重的健康问题，过滤技术得到了广泛的研究。这些研究的目的是开发连续高效去除金属氧化物粉尘的机制。在这项研究中，我们引入了一种基于磁吸引力的新型空气过滤系统。该过滤系统由磁性纳米颗粒（MNP）修饰的纳米纤维（MNP-NF）过滤器组成。我们使用简单的静电纺丝系统，制造了具有均匀分布的 FeO MNP 的连续、光滑的静电纺纳米纤维。与对照过滤器（无 MNPs，约 68%）相比，我们的静电纺丝 MNP-NF 过滤器对 300nm 粒径的颗粒具有更高的颗粒收集效率（约 97%），压力降约低 64%（约 17Pa）。与对照过滤器（约 27Pa）相比。最后，MNP-NF 过滤器的过滤质量因子分别是对照过滤器和传统高效空气过滤器（>99%和约 269Pa）的 4.7 和 11.9 倍。此外，我们还成功地对我们的 MNP-NF 过滤器进行了地铁站隧道粉尘的现场测试。这项工作表明，我们的新型 MNP-NF 过滤器可用于在实际环境中有效保护免受有害金属氧化物粉尘的侵害。
