Classic Theory of Aerosol Filtration for Application to Urban Green Infrastructure

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Water, Air, & Soil Pollution Pub Date : 2025-02-27 DOI:10.1007/s11270-025-07829-y

Nathalie Tomson, Ruby N. Michael, Igor E. Agranovski

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Abstract

The use of green infrastructure (GI) in urban environments has been widely investigated for its associated ecosystem services including air pollution mitigation. Plants are well-known for their ability of purifying air through photosynthesis and microbial activities occurring in the rhizosphere, however the simple filtration of particulate matter in air by plants is still not well understood. This study aimed to investigate the potential to adapt classic filtration theory for application in GI design. Two native Australian plants used as filter media were involved in laboratory experiments to remove aerosol particles ranging in size from 0.3 to > 10 µm. A comparison of aerosol removal efficiencies obtained from the laboratory experiments and predicted through classic filtration theory showed good correlation for the smaller (needle-like) leaf system. In contrast, the correlation obtained for a plant with larger elliptical leaves was not as good, showing a larger difference between the results. Such outcomes led to the conclusion that smaller and spatially homogeneous plant systems have more predictable aerosol filtration characteristics, which can be reasonably calculated using filtration theory. This finding provides practical insight into GI design, allowing quantitative predictions of local air pollution reductions using green barriers.

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经典气溶胶过滤理论在城市绿色基础设施中的应用

在城市环境中使用绿色基础设施（GI）已被广泛研究其相关的生态系统服务，包括缓解空气污染。植物通过光合作用和根际微生物活动净化空气的能力是众所周知的，但是植物对空气中颗粒物的简单过滤仍然不太清楚。本研究旨在探讨经典过滤理论在GI设计中的应用潜力。两种澳大利亚本土植物作为过滤介质参与了实验室实验，以去除大小在0.3至10微米之间的气溶胶颗粒。室内实验得到的气溶胶去除效率与经典过滤理论预测的气溶胶去除效率的比较表明，较小的（针状）叶片系统具有良好的相关性。相比之下，对于椭圆叶较大的植物，获得的相关性就不那么好了，结果之间的差异更大。这些结果表明，较小且空间均匀的植物系统具有更可预测的气溶胶过滤特性，可以使用过滤理论合理计算。这一发现为地理标志设计提供了实用的见解，允许使用绿色屏障对当地空气污染减少进行定量预测。图形抽象

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.