Accumulation of heavy metals in the leaves of different tree species and its association with the levels of atmospheric PM_2.5-bond heavy metals in Isfahan.

IF 3.4 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Phytoremediation Pub Date : 2024-10-12 DOI:10.1080/15226514.2024.2413414

Saadat Omidi, Hakimeh Teiri, Farzaneh Mohammadi, Yaghoub Hajizadeh

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Abstract

This study aimed to biomonitor air pollution by measuring heavy metals (HMs) accumulation levels in the leaves of common urban trees, Cupressus arizonica Greene, Melia azedarach L., Morus alba L. and Buxus colchica in different regions of Isfahan. Their association with the levels of PM_2.5 and PM_2.5-bond HMs was also investigated. PM_2.5 were collected on a glass-fiber filter and measured by gravimetric method. The HM contents of the PM_2.5 and tree leaves were extracted and analyzed by ICP-OES. The average PM_2.5 concentrations in ambient air of all areas varied from 52.34 to 103.96 μg/m³. The mean HMs levels in the leaves were in the following orderZn(31.2) > Cu(11.04) > Pb(4.38) > Ni(4.01) > Cr(3.03) > Co(0.61) > Cd(0.04) (μg/g). The highest level of HMs was detected in the leaves of Morus alba L., followed by Buxus colchica, Melia azedarach L. and Cupressus arizonica Greene. There was a significant correlation between the amounts of Pb and Cu in tree leaves and those in ambient PM_2.5 (p value ≤ 0.05). In conclusion, tree leaves can be used as a suitable bioindicator in the evaluation of air pollution. Morus alba L. compared to the other species can be confidently used for green space development.

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伊斯法罕不同树种叶片中重金属的积累及其与大气 PM2.5 结合重金属水平的关联。

本研究旨在通过测量伊斯法罕不同地区常见城市树木（Cupressus arizonica Greene、Melia azedarach L.、Morus alba L.和 Buxus colchica）叶片中的重金属 (HMs) 积累水平，对空气污染进行生物监测。此外，还研究了它们与 PM2.5 和 PM2.5 粘合剂 HMs 水平的关系。用玻璃纤维过滤器收集 PM2.5，并用重量法进行测量。提取 PM2.5 和树叶中的 HM 含量，并用 ICP-OES 进行分析。所有地区环境空气中 PM2.5 的平均浓度介于 52.34 至 103.96 μg/m3 之间。树叶中 HMs 的平均含量依次为锌 (31.2) > 铜 (11.04) > 铅 (4.38) > 镍 (4.01) > 铬 (3.03) > 钴 (0.61) > 镉 (0.04) (μg/g) 。在白桑叶中检测到的 HMs 含量最高，其次是 Buxus colchica、Melia azedarach L. 和 Cupressus arizonica Greene。树叶中的铅和铜含量与环境 PM2.5 中的铅和铜含量有明显的相关性（p 值≤ 0.05）。总之，树叶可作为评估空气污染的合适生物指标。与其他树种相比，白桑树可以放心地用于绿地开发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Phytoremediation 环境科学-环境科学

CiteScore

7.60

自引率

5.40%

发文量

145

审稿时长

3.4 months

期刊介绍： The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.