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在海南的PM_2.5中水溶性离子的表征和来源分析:时间变化和远程运输

Xinghong Xu¹, Wenshuai Xu¹, Xinxin Meng¹

¹Hainan Provincial Ecological and Environmental Monitoring Center, Haikou 571126, China.

|September 27, 2025

概括

水溶性离子对海南的PM2.5有很大的贡献,由二次来源和区域运输驱动. 空气质量因季节而异,受冬季陆地外流和夏季海洋空气的影响.

科学领域:

环境科学环境科学
大气化学大气化学
空气质量研究空气质量研究

背景情况:

颗粒物 (PM2.5) 对空气质量和健康构成重大风险.
了解PM2.5的组成和来源,特别是水溶性离子,对于有效的污染控制至关重要.
海南的独特地理位置需要对其空气污染动态进行具体调查.

研究的目的:

调查PM2.5.5中水溶性离子的质量度和变化.
确定PM2.5及其水溶性离子分数的来源和传输途径.
分析这些离子的季节性特征及其对空气质量的影响.

主要方法:

使用正矩阵因子化 (PMF) 模型进行源分配.
采用逆行轨迹分析来确定污染物运输路径.
在一年内分析了水溶性离子和PM2.5的质量度.

主要成果:

溶于水的离子占PM2.5的73.5%,平均为7.0 ± 4.4μg m-3.3.
其次离子 (硫酸盐,酸盐,) 主导 (84.0%),其次是海盐.
观察到显著的季节性变化,冬季度最高,夏季最低.

结论:

二次气溶,燃烧,尘埃和海洋来源是海南PM2.5的主要贡献者.
区域运输,特别是从YRD-PRD-福建走廊,影响高PM2.5水平,而海洋空气稀释污染.
污染源的季节性模式决定了海南的空气质量,有着明显的冬季-春季,秋季和夏季特征.

关键词:

对于PM2.5来说,这是一个很好的例子.区域运输区域运输区域运输在来源分配分配.在水中溶解的离子.

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