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揭示了船只忽视的有机酸盐颗粒物直接排放

Jing Chen¹, Xiao Fu¹, Xinfeng Wang²

¹Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.

Environment international

|February 17, 2024

概括

船舶直接排放是有机酸盐颗粒物 (pONs) 的重要来源,影响空气质量和气候. 这项研究量化了这些排放,突出了它们在海洋环境中的重要性.

科学领域:

大气化学大气化学
环境科学环境科学
海洋污染海洋污染

背景情况:

有机微粒酸盐 (pONs) 影响循环,空气污染和区域气候.
二次形成是pONs的主要来源,但直接排放的研究不足.
船舶的废气是已知的活性的来源,但船舶的pONs排放很少被描述.

研究的目的:

调查和量化直接来自船舶排气的有机酸盐颗粒物 (pONs) 排放.
评估船舶排放对海洋环境pONs度的影响.
为了确定船舶排气中的pONs的排放因子.

主要方法:

在东中国海的船只巡航期间对pONs的大气测量.
从船舶废气中测量pONs的排放量.
化学运输模型模拟以评估直接船舶排放的贡献.

主要成果:

在船舶排气中确定并量化了五种类型的pON,平均总度为1123 ± 406 μg m-3.
在受到船舶排放影响的地区,与不受影响的地区相比,环境pONs度显著更高 (479 ± 193 ng m−3).
来自船舶废气的pONs的排放因子在0.112.6 mg kWh-1.1之间.

结论:

来自船舶的直接pON排放是大气pON的重要来源,特别是在干净的海洋大气中.
这些发现强调了将直接船舶排放纳入大气模型的必要性,以准确地预测空气质量和气候.
建议进行进一步的研究,以描述船只和其他潜在来源的pONs排放.

关键词:

有机酸盐颗粒物有机酸盐颗粒物主要排放的主要排放.船舶的废气排放系统

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