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Li Z, Wang S, Jia M, Wang X, Cao B, Liu Y, Kang W. Electrospun PA6 multi-stage structured nanofiber membrane with high filtration performance for oily particles. ENVIRONMENTAL TECHNOLOGY 2024; 45:3216-3227. [PMID: 37166472 DOI: 10.1080/09593330.2023.2213831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 03/25/2023] [Indexed: 05/12/2023]
Abstract
Oily particles pollution poses a tremendous threat to people's health, so it is urgent to develop air filtration materials with the ability of removing fine oily particles effectively. In this study, a nylon 6 multi-stage structured nanofiber membrane (PA6 MSNM) for effective air filtration of fine oily particles was designed and fabricated by adding a certain amount of tetrabutylammonium hexafluorophosphate (TBAHP) via one-step electrospinning. The PA6 MSNMs were composed of coarse trunk fibres and fine branching fibres. Benefiting from the properties of small pore size and high porosity, the resulting PA6 MSNMs exhibited high average filtration efficiency of 99.80% for oily aerosol particles of 0.20-4.59 μm, a low pressure drop of 251 Pa, and the high quality factor of 0.0248 Pa-1. More importantly, its filtration efficiencies for oily aerosol particles of 0.25 and 0.30 μm were up to 99.99% and 100.00%, respectively. It is expected that the multi-stage electrospun nanofiber membranes would have wide application prospects in air filtration, particularly for filtering oily particles.
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Affiliation(s)
- Zongjie Li
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, PR People's Republic of China
- School of Textile Science and Engineering, Tiangong University, Tianjin, PR People's Republic of China
| | - Shuye Wang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, PR People's Republic of China
- School of Textile Science and Engineering, Tiangong University, Tianjin, PR People's Republic of China
| | - Mengge Jia
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, PR People's Republic of China
- School of Textile Science and Engineering, Tiangong University, Tianjin, PR People's Republic of China
| | - Xinhui Wang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, PR People's Republic of China
- School of Textile Science and Engineering, Tiangong University, Tianjin, PR People's Republic of China
| | - Bao Cao
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, PR People's Republic of China
- School of Textile Science and Engineering, Tiangong University, Tianjin, PR People's Republic of China
| | - Yong Liu
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, PR People's Republic of China
- School of Textile Science and Engineering, Tiangong University, Tianjin, PR People's Republic of China
| | - Weimin Kang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin, PR People's Republic of China
- School of Textile Science and Engineering, Tiangong University, Tianjin, PR People's Republic of China
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Cheng Y, Li J, Chen M, Zhang S, He R, Wang N. Environmentally friendly and antimicrobial bilayer structured fabrics with integrated interception and sterilization for personal protective mask. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Air pollution control for indoor environments using nanofiber filters: a brief review and post-pandemic perspectives. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Mbachu O, Kaparaju P, Pratt C. Plastic pollution risks in bioretention systems: a case study. ENVIRONMENTAL TECHNOLOGY 2022:1-14. [PMID: 35084286 DOI: 10.1080/09593330.2022.2034984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
We investigated plastic pollution in soil-based stormwater bioretention systems (BRS), which are potentially important pollutant receptors and pathways. Our integrated study is the first of its kind, focusing on plastic abundance, size fractionation, composition, and interactions with urban metrics (including housing density and auxiliary stormwater treatment infrastructure) in BRS filter media. Our results revealed that mesoplastic (MEP) and microplastic (MP) concentrations in BRS are comparable with those reported in other stormwater systems (e.g. wetlands) as well as soils in other land use areas (e.g. agriculture). Distributional sampling within the BRS revealed MP abundances do not change with horizontal distance from the inlet to the outlet. However, MEP abundances drastically decreased towards the outlet, indicating plastic accumulation within BRS. This is important because MEPs can breakdown into MPs which can affect BRS function as well as mobilise downstream. Yet our data uncovered more complex mechanisms involved in BRS plastic fate, with composition data revealing that MPs are not simply breakdown products of MEPs but are instead derived from different sources. Composition, morphology and colour analysis confirmed that BRS polymer liners are a key source of MPs and MEPs in soil filter media. Multivariate analysis of the data with urban design metrics showed gross pollutant traps are effective at decreasing MP concentrations in BRS but not as effective at controlling MEPs. Our results point to complex plastic transmission and accumulation pathways in BRS. Interception measures can partially alleviate plastic risk, but more work is needed to elucidate plastic long-term fate in BRS.
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Affiliation(s)
- Oluchi Mbachu
- School of Engineering and Built Environment, Griffith University, Brisbane, Australia
| | - Prasad Kaparaju
- School of Engineering and Built Environment, Griffith University, Brisbane, Australia
| | - Chris Pratt
- School of Environment and Science, Australian Rivers Institute, Griffith University, Brisbane, Australia
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