Removal of airborne nanoparticles by membrane coated filters.
Removal of airborne nanoparticles by membrane coated filters.
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DOI：
10.1016/j.scitotenv.2011.08.011
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发表时间：
2011-10-15
期刊：
影响因子：
--
通讯作者：
Wang J
中科院分区：
文献类型：
--
作者：
Liu J;Pui DY;Wang J
随着纳米技术的发展，纳米颗粒的数量越来越多，这引起了人们对环境潜在负面影响和对人类健康危害的担忧。膜过滤器是控制纳米颗粒的有效介质。三个过滤器涂有聚四氟乙烯（PTFE）膜在这项研究中进行了调查。对过滤器的过滤效率及相关参数如颗粒粒径、面风速等进行了一系列实验。数据表明，膜过滤器的效率曲线表明，在面速度为0.3至15 cm/s时，粒径为10至300 nm的颗粒呈典型的“v”形。孔径较大的膜过滤器具有较大的最大穿透粒径（MPPS），并且MPPS随着面流速的增加而减小。对于粒径为10 ~ 300 nm的颗粒，效率随面速度的增加而降低。我们提出的过滤效率数据作为一种新的三维图形来说明其依赖于颗粒的大小和面速度。膜涂覆的过滤器可以被认为是两个组合层，一个纤维层和一个膜层。我们开发了一个新的过滤效率模型，它是两个层的模型的组合。模型计算结果与实验数据吻合较好。该研究可以帮助优化过滤器产品并确定过滤器的操作参数，从而有助于减少快速出现的纳米颗粒对空气的污染。
The increasing amount of nanoparticles with the development of nanotechnology gives rise to concerns about potential negative impact on the environment and health hazards posed to humans. Membrane filter is an effective media to control nanoparticles. Three filters coated with polytetrafluoroethylene (PTFE) membrane were investigated in this study. A series of experiments on the filter efficiency and relevant parameters such as the particle size and face velocity were carried out. The data show that the efficiency curves for the membrane filters demonstrate the typical shape of “v” for particle sizes from 10 to 300 nm at face velocities from 0.3 to 15 cm/s. Membrane filters with larger pore sizes have larger Most Penetrating Particles Sizes (MPPS), and the MPPS decreases with increasing face velocity. The efficiencies decrease with increasing face velocity for particle sizes from 10 to 300 nm. We present the filtration efficiency data as a novel three-dimensional graph to illustrate its dependence on the particle size and face velocity. The membrane coated filter can be considered as two combined layers, one fibrous layer and one membrane layer. We develop a new filtration efficiency model which is a combination of the models for the two layers. Results from the model calculation agree with experimental data well. The study can help to optimize the filter product and to determine the operational parameters of filters, thus contributing to reduction of air pollution by rapidly emerging nanoparticles.
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影响因子：
5.2
作者：
Wang, Jing;Kim, Seong Chan;Pui, David Y. H.
通讯作者：
Pui, David Y. H.
影响因子：
5
作者：
MANTON, MJ
通讯作者：
MANTON, MJ
影响因子：
5
作者：
MANTON, MJ
通讯作者：
MANTON, MJ
影响因子：
4.5
作者：
Wang, Jing;Kim, Seong Chan;Pui, David Y. H.
通讯作者：
Pui, David Y. H.
影响因子：
5.2
作者：
Wang, Jing;Kim, Seong Chan;Pui, David Y. H.
通讯作者：
Pui, David Y. H.