大气中的度和同位素组成受典型人为排放源影响
Chuan Wang1,2, Shaochen Yang1, Ruolan Li1,2
1State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.
Environmental science & technology
|September 10, 2024
概括
燃煤发电厂和水泥厂排放,对当地沉积产生不同的影响. 同位素有助于追踪这些工业排放,并为减少政策提供信息.
科学领域:
- 环境化学环境化学
- 大气科学 大气科学
- 地质化学 地质化学
背景情况:
- 燃煤发电厂 (CFPP) 和水泥厂 (CP) 是人类造成的 (Hg) 排放的重要来源.
- 烟气中的物种在CFPP和CP之间有所不同,影响了当地的大气Hg沉积模式.
研究的目的:
- 量化CFPP和CP排放对当地的大气Hg沉积的影响.
- 调查排放源,物种和沉积模式之间的关系.
主要方法:
- 气态元素 (GEM),颗粒结合 (PBM) 和降水总Hg (THg) 的测量度和同位素.
- 在多个位置收集数据,距离CFPP和CP的距离不同.
- 分析了与工厂运营有关的Hg度的季节性变化.
主要成果:
- 大气中的度在CFPP和CP附近达到峰值,随着距离的增长而下降.
- 由于电力需求增加,夏季CFPP附近的GEM和降水THg较高.
- 与Hg0排放相关的CFPP附近的高GEM;与双价Hg排放相关的CP附近的高PBM和降水Hg.
- CFPP的排放量对当地GEM (58.3%) 和PBM (52.3%) 产生了显著的贡献.
- CP排放对当地GEM (47.0%) 和PBM (60.0%) 产生了显著的贡献.
结论:
- 来自工业来源的指定明显影响了当地的大气循环.
- 对于评估减排政策的有效性而言,Hg规范概况至关重要.
- 同位素作为监测环境排放的有价值的工具.
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