Particulate Matter and Trace Metal Retention Capacities of Six Tree Species: Implications for Improving Urban Air Quality
Particulate Matter and Trace Metal Retention Capacities of Six Tree Species: Implications for Improving Urban Air Quality
复制标题
六种树种的颗粒物和微量金属保留能力：对改善城市空气质量的影响
DOI：
10.3390/su142013374
复制
发表时间：
2022-10
期刊：
影响因子：
3.9
通讯作者：
Zhang Zhi
中科院分区：
文献类型：
--
作者：
Zhang Weikang;Li Yu;Wang Qiaochu;Zhang Tong;Meng Huan;Gong Jialian;Zhang Zhi
植物作为天然颗粒物的有效过滤器，在减少颗粒物，从而改善空气质量方面发挥着重要作用。然而，在不同污染环境下，叶片功能性状与PM截留能力的关系研究仍然有限。本研究以沈阳市的6种树种（冷杉、油松、圆柏、白杨、垂柳、刺槐）为研究对象，分析了它们在3种不同污染环境（即大气、土壤、水体、土壤、土壤）中对PM的截留能力。一条忙碌的道路、城市中心的工业区和一个绿色空间）。此外，我们还测定了与不同污染环境相关的微量元素组成，并评估了不同污染环境对叶表面性状的影响。结果表明，不同污染地点和植物种类的叶片表面PM和微量元素的实际积累量有很大差异。沉积在测试植物叶片上的PM10和PM2.5的最大积累是在交通相关的污染站点和最小的积累是在公园网站。不同树种叶片对PM10和PM2.5的截留能力差异显著（p < 0.05），其大小顺序为：沙松>油松>圆柏>白杨>垂柳>刺槐。细叶冷杉对PM10和PM2.5的平均累积量是其它植物的1.28-8.74倍（p < 0.05）。微量元素分析表明，叶片表面PM的元素组成具有位置依赖性。总之，与低污染环境相比，高污染环境可以增加平均沟槽宽度、气孔密度和粗糙度。相比之下，接触角的平均值在低污染的网站比在其他网站更高。这些结果表明，冷杉是最合适的绿化树种，它的广泛使用可以显着减少城市环境中的PM污染。
As effective filters for natural particulate matter (PM), plants play an important role in the reduction of PM, thus improving air quality. However, research on the relationship between leaf functional traits and PM retention capacity in different polluted environments remains limited. In this study, six tree species (Abies holophylla, Pinus tabuliformis, Juniperus chinensis, Populus berolinensis, Salix babylonica, Robinia pseudoacacia) in Shenyang city, China were selected as research objects to analyze their PM retention capacity in three different polluted environments (i.e., a busy road, an industrial area of the urban center, and a green space). Additionally, we determined the composition of trace elements associated with the different polluted environments; we also evaluated the impact of different polluted environments on leaf surface traits. The results showed that the actual amounts of PM and trace elements that accumulated on leaf surfaces differed considerably between pollution sites and plant species. The greatest accumulation of PM10 and PM2.5 deposited on the leaves of tested plants was at a traffic-related pollution site and the smallest accumulation was at a park site. There were significant differences in the PM10 and PM2.5 retention capacities of leaves among the different tree species (p < 0.05), in the following order: Abies holophylla > Pinus tabuliformis > Juniperus chinensis > Populus berolinensis > Salix babylonica > Robinia pseudoacacia. The average PM10 and PM2.5 accumulation amounts of Abies holophylla were 1.28–8.74 times higher than these of the other plants (p < 0.05). Trace element analysis showed that the elemental composition of PM accumulated on leaf surfaces was location-dependent. In conclusion, a highly polluted environment can increase the average groove width, stomatal density, and roughness compared to a low-polluted environment. In contrast, the average value of contact angle is higher at low-pollution sites than at other sites. These results suggest that Abies holophylla is the most suitable greening tree species and that its widespread use could significantly reduce PM pollution in urban environments.