在伊朗三个大城市使用现场和卫星数据识别城市灰尘和重金属的来源
Zahra Mansouri1, Hossein Mohammad Asgari2, Sedigheh Battaleb-Looie3
1Department of Marine Environment, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran.
Bulletin of environmental contamination and toxicology
|July 15, 2024
概括
这项研究评估了伊朗城市尘埃中的重金属,发现交通场所含Mn,Zn和Cr的度最高. 气溶光学深度的趋势有所不同,在伊斯法罕和希拉兹增加了AOD,但在阿瓦兹下降了.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 大气科学 大气科学
背景情况:
- 城市灰尘是重金属的重要储存库,对人类健康和环境构成风险.
- 交通和工业活动是城市环境中重金属污染的主要原因.
- 用气溶光学深度 (AOD) 测量的气溶可以影响城市尘埃的组成和分布.
研究的目的:
- 进行综合评估来自伊朗阿瓦兹,伊斯法罕和希拉兹的城市尘埃中的重金属.
- 使用正矩阵因子化 (PMF) 模型识别重金属污染源.
- 评估与重金属暴露相关的健康风险,并分析气溶光学深度 (AOD) 的趋势.
主要方法:
- 城市尘埃样本从伊朗三个城市的交通,工业,住宅和绿地场所收集.
- 使用诱导合等离子体质谱法 (ICP-MS) 确定了10种重金属度.
- 积极矩阵因子化 (PMF) 模型被应用于来源分配,并评估了健康风险. 从2003年到2023年的气溶光学深度 (AOD) 数据使用曼肯达尔测试进行了分析.
主要成果:
- 交通场所的 (Mn), (Zn) 和 (Cr) 的平均度最高.
- 在PMF模型中,交通被确定为污染的重要来源.
- (Cr) 构成最高的非致癌健康风险 (危险指数),而致癌风险处于可容忍范围内.
- 气溶光学深度 (AOD) 在伊斯法罕和希拉兹呈现上升趋势 (p < 0.05),但在阿瓦兹呈现下降趋势,尽管其AOD值较高.
结论:
- 伊朗的城市灰尘受到重金属的重大影响,交通排放是主要关注的问题.
- 虽然Cr等某些金属的非致癌风险需要注意,但整体健康风险是可以管理的.
- 气溶趋势在伊朗各个城市各不相同,表明影响城市环境的复杂大气动态.
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