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揭示珍珠河三角洲上空船只对大气酸盐的低估贡献:基于双同位素

Tian-Shu Chen¹, Hong-Wei Xiao², Jun-Liang Tao¹

¹School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.

Journal of hazardous materials

|November 5, 2025

概括

船舶排放对珍珠河三角洲的大气酸盐污染有显著的贡献,与交通来源相匹配. 这一发现对于广州等沿海大城市的空气质量管理至关重要.

科学领域:

环境化学环境化学
大气科学大气科学
海洋生态系统海洋生态系统

背景情况:

细颗粒物 (PM2.5) 中的酸盐 (NO3-) 威胁着人类健康和海洋生态系统.
船舶排放是港口城市大气中酸盐污染的一个主要,但量化不足的来源.
珍珠河三角洲 (PRD) 是一个关键地区,因为它是全球航运枢纽.

研究的目的:

量化船舶排放对大气中酸盐污染的贡献.
评估船舶排放对沿海空气质量管理的影响.
为了了解一个主要的沿海大城市中酸盐污染的来源.

主要方法:

在广州对酸盐 (NO3-) 全年双同位素 (δ¹⁵N和 δ¹⁸O) 的分析.
应用贝叶斯同位素混合模型 (MixSIAR).
使用卫星数据和排放清单进行验证.

主要成果:

在PRD,船舶排放每年占大气中酸盐 (NO₃^-) 的45.0 ± 1.5%.
船舶的排放贡献与交通来源 (46.6 ± 1.3%) 相比,明显高于煤炭燃烧 (8.4 ± 0.2%).
在同位素分析,卫星数据和排放库存中,结果一致.

结论:

船舶排放是珍珠河三角洲大气酸盐 (NO3) 污染的主要和持续的来源.
准确的来源分配对于有效的沿海空气质量管理战略至关重要.
同位素分析提供了一种可靠的方法来量化复杂的城市环境中的污染贡献.

关键词:

亚酸盐是一种酸盐.同位素是的同位素之一.氧的同位素是氧的同位素.珍珠河三角洲是什么意思船舶排放的排放量船舶排放量

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