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在空中沉积的道路颗粒中发现的PAHs的来源概况和致癌风险评估

Shilpi Mondal¹, Sharad Gokhale²

¹Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India.

Environmental monitoring and assessment

|October 6, 2025

概括

在古瓦哈提的多环芳香碳化合物 (PAHs).

科学领域:

环境科学环境科学
环境化学环境化学
毒理学毒理学毒理学

背景情况:

多环芳 (PAH) 是重要的环境污染物.
它们无处不在的存在和生物毒性需要进行彻底的调查.
道路灰尘是PAH积累和运输的关键介质.

研究的目的:

为了分析16种优先PAHs在瓜哈提空中沉积的公路颗粒中的度和分布.
通过本佐[a]烯等效 (BaPeq) 毒性和增量终身癌症风险 (ILCR) 评估与PAH暴露相关的人类健康风险.
确定城市环境中PAHs的主要来源.

主要方法:

从五个土地使用区的30个地点采集空中沉积的道路颗粒的样本.
美国环境保护局 (USEPA) 使用气体染色学-质谱学 (GC-MS) 对16种优先级PAH的分析.
用于评估人类健康风险的BaPeq毒性和ILCR的计算.
使用正矩阵因子化 (PMF) 和诊断比率的确定来识别源.

主要成果:

高分子量PAH是道路灰尘中占主导地位的成分.
度在国家公路 (8601 ng/g) 附近最高,在住宅区 (2081 ng/g) 最低.
在国家公路站点观察到显著的BaPeq毒性 (921.5 ± 21.54 ng BaPeq/g).
综合危险水平表明成人和儿童有显著的癌症风险 (10^-6到10^-4).

结论:

商业化和工业化对瓜哈提的PAH排放产生了重大影响.
交通排放,工业活动和燃煤/木材燃烧是道路灰尘中PAH的主要来源.
道路灰尘中的PAHs对城市人口构成相当大的健康风险,需要采取缓解策略.

关键词:

诊断的比率是指诊断的比率.古瓦哈蒂是古瓦哈蒂的一个城市.在ILCR中,它是ILCR.这些PAHs是PAH.在PMF中,PMF是指PMF.道路上的颗粒.

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