基于正矩阵因子化和蒙特卡洛模拟的大学校园微尘中的潜在有毒金属化物源特定的概率风险评估
Xinwei Lu1, Zhenze Wang1, Yurong Chen1
1Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China.
Journal of environmental management
|September 27, 2023
概括
在大学校园的细尘中存在潜在的有毒金属化物 (PTM) 是一个问题,交通排放是其中的主要来源. 虽然生态风险低至中等,但致癌性PTM对学生构成某些癌症风险.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 地质化学 地质化学
背景情况:
- 微尘 (FD63) 中的潜在有毒金属化物 (PTM) 是广泛存在的环境污染物.
- 由于各种人类活动,大学校园容易受到PTM积累.
研究的目的:
- 调查大学校园微尘中的10种PTM的污染水平,来源和生态健康风险.
- 评估FPM在FD63.3中的环境质量和影响因素.
主要方法:
- 使用统计方法对PTM来源进行定性分析.
- 使用正矩阵因数分解进行定量源分配.
- 使用丰富系数对污染程度的评估.
- 使用蒙特卡洛模拟对生态健康风险的评估.
主要成果:
- 在FD63中的Zn,Pb,Cr,Cu和Ba水平明显超过了土壤背景值.
- 交通非废气排放 (45.7%) 是PTM的主要来源,其次是自然来源 (25.4%).
- 综合性污染很高 (Zn,非废气排放),生态风险低至中等 (Pb,交通废气),致癌性PTM带来了某些癌症风险.
结论:
- 大学校园中的微尘具有显著的PTM污染,主要来自交通非废气排放.
- 和是优先考虑的PTM,混合来源 (汽车维修,油漆) 是关键的污染贡献者,需要注意.
- 虽然非癌症风险在安全水平之内,但致癌性PTM需要有针对性的管理策略来保护学生的健康.
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