'Green barriers' for air pollutant capture: Leaf micromorphology as a mechanism to explain plants capacity to capture particulate matter.
'Green barriers' for air pollutant capture: Leaf micromorphology as a mechanism to explain plants capacity to capture particulate matter.
复制标题
DOI：
10.1016/j.envpol.2021.117809
复制
发表时间：
2021-07
影响因子：
8.9
通讯作者：
María del Carmen Redondo-Bermúdez;Idris T. Gulenc;R. Cameron;B. Inkson
中科院分区：
文献类型：
--
作者：
María del Carmen Redondo-Bermúdez;Idris T. Gulenc;R. Cameron;B. Inkson
寻找减少大气颗粒物（PM）的方法是对抗空气污染和保护人们健康的关键步骤之一。使用绿色基础设施是有助于改善城市空气质量和促进城市可持续发展的一种选择。植物如何捕获颗粒物质的详细知识可以支持为此目的选择植物。以前的研究主要集中在二维技术来评估植物叶片的微观形态。在这里，3D光学轮廓术和扫描电镜成像（2D）用于量化位于混合物种绿色屏障内的三种对比植物（Hedera helix ' woerner ',Thuja occidentalis ‘ smaragd ’和phyllostachys nigra）的叶片粗糙度和其他微形态叶片特征。这些技术使我们能够以高空间分辨率确定附着的大气PM相对于叶片表面地形的相对分布。叶片表面粗糙度与PM沉积无直接关系；然而，沟槽的宽度、深度和频率描述符对于解释叶片捕获PM很重要。此外，叶片上蜡的存在与PM粘附有关。所有物种捕获PM的总体效率从高到低依次为：huja occidentalis bbb、Hedera helix bbb、Phyllostachys nigra。所有绿色屏障物种都通过PM捕获对空气质量的改善做出了贡献，无论它们在屏障内的位置如何。在绿色屏障中有多个物种是有益的，因为存在不同范围的叶片微形态，从而提供不同的颗粒物质捕获机制。
Finding ways to mitigate atmospheric particulate matter (PM) is one of the key steps towards fighting air pollution and protecting people's health. The use of green infrastructure is one option that could help improving urban air quality and promoting more sustainable cities. Detailed knowledge of how plants capture particulate matter can support plant selection for this purpose. Previous studies have primarily focused on 2D techniques to assess the micromorphology of plant leaves. Here, 3D optical profilometry and SEM imaging (2D) are used to quantify leaf roughness and other micromorphological leaf traits of three contrasting plant species (Hedera helix‘Woerner’,Thuja occidentalis‘Smaragd’, andPhyllostachys nigra) located within a mixed-species green barrier. These techniques have allowed us to identify the relative distribution of adhered atmospheric PM with respect to the surface topography of leaves, with high spatial resolution. Leaf surface roughness did not show a direct relationship with PM deposition; however, the descriptors width, depth and frequency of the grooves are important to explain PM capture by the leaves. Additionally, the presence of wax on leaves was relevant for PM adherence. All species captured PM, with their overall PM capture efficiency ranked from highest to lowest as follows:Thuja occidentalis>Hedera helix>Phyllostachys nigra. All green barrier species contributed to air quality improvement, through PM capture, regardless of their location within the barrier. Having multiple species in a green barrier is beneficial due to the diverse range of leaf micromorphologies present, thus offering different mechanisms for particulate matter capture.