同位素特征和NOx在中国燃烧生物质中的重要性
Zanfang Jin1, Jiawen Li1, Qiang Yang2
1Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310032, China.
The Science of the total environment
|August 11, 2024
概括
生物质燃烧在中国对大气氧化 (NOx) 污染作出了重大贡献. 这项研究开发了同位素指纹检测方法,以量化生物质燃烧的数量.
科学领域:
- 环境化学环境化学
- 大气科学 大气科学
- 同位素地球化学 同位素地球化学
背景情况:
- 生物质燃烧是大气中氧化 (NOx) 的主要来源.
- 对NOx的同位素分析对于来源归因至关重要,但缺乏生物质燃烧的确立指纹.
- 了解氧化的来源对于中国的空气质量管理至关重要.
研究的目的:
- 为在中国燃烧生物质建立可靠的同位素指纹 (δ15N-NOx).
- 量化生物质燃烧对中国NOx总排放的贡献.
- 改进用于追踪大气NOx污染的模型.
主要方法:
- 从中国10个省份收集和分析了25个生物质燃料样本.
- 来自开放式燃烧和农村炉的生物质燃料和氧化物排放的确定δ15N值.
- 开发并应用了改进的 δ15N-NOx 模型,其中包含了区域运输和排放数据.
- 利用贝叶斯模型与降水和颗粒物同位素数据来估计NOx来源的贡献.
主要成果:
- 在燃烧的δ15N-生物质和δ15N-NOx之间建立了显著的线性关系.
- 计算了中国生物质燃烧 (BB) 的 δ15N-NOx 平均值 (5.0 ± 1.8 ‰),改进了区域估计 (2.3 8.4 ‰).
- 生物质燃烧被确定为中国NOx排放的重要贡献者,范围从20.9%到44.3%.
结论:
- 开发的同位素方法为追踪生物质燃烧排放提供了可靠的指纹.
- 生物质燃烧是中国大气中NOx的重要来源,需要有针对性的排放控制战略.
- 精确的NOx来源分配对于有效减轻空气污染至关重要.
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