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燃烧源与沙尘颗粒物中铁的同位素组成

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李锐, 张欢欢, 何雨婷, 安亚军, 张兆峰, 唐明金. 燃烧源与沙尘颗粒物中铁的同位素组成[J]. 环境化学, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
引用本文: 李锐, 张欢欢, 何雨婷, 安亚军, 张兆峰, 唐明金. 燃烧源与沙尘颗粒物中铁的同位素组成[J]. 环境化学, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
shu
LI Rui, ZHANG Huanhuan, HE Yuting, AN Yajun, ZHANG Zhaofeng, TANG Mingjin. Iron isotopic compositions of combustion source particles and mineral dust[J]. Environmental Chemistry, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
Citation: LI Rui, ZHANG Huanhuan, HE Yuting, AN Yajun, ZHANG Zhaofeng, TANG Mingjin. Iron isotopic compositions of combustion source particles and mineral dust[J]. Environmental Chemistry, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
shu

燃烧源与沙尘颗粒物中铁的同位素组成

  • 1. 中国科学院广州地球化学研究所有机地球化学国家重点实验室、广东省环境资源利用与保护重点实验室及粤港澳环境污染过程与控制联合实验室, 广州, 510640;

  • 2. 中国科学院广州地球化学研究所同位素地球化学国家重点实验室, 广州, 510640;

  • 3. 中国科学院大学, 北京, 100049

    • 通讯作者: 唐明金, E-mail: mingjintang@gig.ac.cn
  • 基金项目:

    国家重点研发计划（2018YFC0213901）和广东省科技计划项目（2019B121205006，2020B1212060053）资助.

Iron isotopic compositions of combustion source particles and mineral dust

  • 1. State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Joint Laboratory of Environmental Pollution Process and Control in Guangdong-Hong Kong-Macao Greater Bay Area, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China;

  • 2. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China;

  • 3. University of Chinese Academy of Sciences, Beijing, 100049, China

    • Corresponding author: TANG Mingjin, mingjintang@gig.ac.cn
  • Fund Project: Supported by Ministry of Science and Technology of China (2018YFC0213901) and Guangdong Foundation for Program of Science and Technology Research(2019B121205006,2020B1212060053).

  • 摘要: 铁是生命必需的微量营养元素之一，可有效促进海洋的初级生产力.大气沉降被认为是开阔海域生物有效铁最主要的来源，而燃烧源与沙尘颗粒物对其贡献的大小，目前还并不清楚.铁同位素技术的发展为大气及海洋环境中铁元素溯源提供了新的技术路径.由于其在大气及海洋环境领域的应用还十分有限，目前对不同来源颗粒物的铁同位素组成的认知也比较有限.本研究选取1种中国煤飞灰、2种美国煤飞灰、1种欧洲城市废物飞灰及3种不同地区沙尘颗粒物（美国亚利桑那沙尘、中国洛川黄土与中国新疆沙尘）为研究对象，测定了不同燃烧源与沙尘颗粒物中铁元素含量及同位素组成.结果表明，煤飞灰颗粒物中铁元素含量明显高于城市废物飞灰与沙尘颗粒物，最高可达10%左右，而后两者中铁元素含量相当，在2%-4%之间.燃烧源颗粒物的δ56Fe值范围为0.05‰-0.75‰，而沙尘颗粒物的δ56Fe值范围为-0.05‰-0.21‰；燃烧源颗粒物的铁同位素组成相比于沙尘颗粒物偏重，这主要与燃料本身以及飞灰颗粒物性质有关.
    Abstract: Iron,one of the essential micronutrients for life,would largely promote oceanic primary productivity. Atmospheric deposition has been recognized as the dominant source of bioavailable iron in the open ocean;however,the relative contribution of combustion aerosol and mineral dust to bioavailable iron in the ocean remains poorly understood. The development of iron isotope techniques provides a new way for tracing iron sources. The application of iron isotope technique in atmospheric and oceanic sciences is still limited,and iron isotopic compositions of aerosols from various sources are not well understood. In this study,we selected one Chinese coal fly ash,two American coal fly ashes,one European city waste fly ash and three mineral dust samples from different regions (Arizona test dust from America,Luochuan Loess from China,and Xinjiang dust from China) and measured their iron contents and iron isotopic compositions. The maximum mass fraction of iron in coal fly ash was measured to be ~10%,significantly higher than those for city waste fly ash and mineral dust (both in the range of 2% to 4%). The δ56Fe values were determined to be 0.05‰-0.75‰ for the four fly ash samples and -0.05‰-0.21‰ for three mineral dust samples,respectively. Compared with mineral dust,combustion source particles showed heavier iron isotopic compositions,probably attributed to large variations in physicochemical properties of fuels and fly ashes.
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  • 收稿日期:  2020-08-15
李锐, 张欢欢, 何雨婷, 安亚军, 张兆峰, 唐明金. 燃烧源与沙尘颗粒物中铁的同位素组成[J]. 环境化学, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
引用本文: 李锐, 张欢欢, 何雨婷, 安亚军, 张兆峰, 唐明金. 燃烧源与沙尘颗粒物中铁的同位素组成[J]. 环境化学, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
shu
LI Rui, ZHANG Huanhuan, HE Yuting, AN Yajun, ZHANG Zhaofeng, TANG Mingjin. Iron isotopic compositions of combustion source particles and mineral dust[J]. Environmental Chemistry, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
Citation: LI Rui, ZHANG Huanhuan, HE Yuting, AN Yajun, ZHANG Zhaofeng, TANG Mingjin. Iron isotopic compositions of combustion source particles and mineral dust[J]. Environmental Chemistry, 2021, (4): 990-998. doi: 10.7524/j.issn.0254-6108.2020081502
shu

燃烧源与沙尘颗粒物中铁的同位素组成

    通讯作者: 唐明金, E-mail: mingjintang@gig.ac.cn
  • 1. 中国科学院广州地球化学研究所有机地球化学国家重点实验室、广东省环境资源利用与保护重点实验室及粤港澳环境污染过程与控制联合实验室, 广州, 510640;
  • 2. 中国科学院广州地球化学研究所同位素地球化学国家重点实验室, 广州, 510640;
  • 3. 中国科学院大学, 北京, 100049
  • 收稿日期:  2020-08-15
基金项目:

国家重点研发计划（2018YFC0213901）和广东省科技计划项目（2019B121205006，2020B1212060053）资助.

摘要: 铁是生命必需的微量营养元素之一，可有效促进海洋的初级生产力.大气沉降被认为是开阔海域生物有效铁最主要的来源，而燃烧源与沙尘颗粒物对其贡献的大小，目前还并不清楚.铁同位素技术的发展为大气及海洋环境中铁元素溯源提供了新的技术路径.由于其在大气及海洋环境领域的应用还十分有限，目前对不同来源颗粒物的铁同位素组成的认知也比较有限.本研究选取1种中国煤飞灰、2种美国煤飞灰、1种欧洲城市废物飞灰及3种不同地区沙尘颗粒物（美国亚利桑那沙尘、中国洛川黄土与中国新疆沙尘）为研究对象，测定了不同燃烧源与沙尘颗粒物中铁元素含量及同位素组成.结果表明，煤飞灰颗粒物中铁元素含量明显高于城市废物飞灰与沙尘颗粒物，最高可达10%左右，而后两者中铁元素含量相当，在2%-4%之间.燃烧源颗粒物的δ56Fe值范围为0.05‰-0.75‰，而沙尘颗粒物的δ56Fe值范围为-0.05‰-0.21‰；燃烧源颗粒物的铁同位素组成相比于沙尘颗粒物偏重，这主要与燃料本身以及飞灰颗粒物性质有关.

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