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可溶性铁,这一看似微不足道的元素,正在连接起气候变化、海洋生态与人类健康的复杂链条。中国地质大学(武汉)环境学院孔少飞团队联合湖北省大气复合污染研究中心,在《地球科学》发表综述论文,总结了源排放大气气溶胶中可溶性铁的理化特性、形成机制与排放清单构建方法,为改进气候和大气化学模型提供了关键支撑。

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追踪大气中的“隐形铁”:气溶胶中的可溶性铁
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    出版时间: 2025-10-28
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    可溶性铁,这一看似微不足道的元素,正在连接起气候变化、海洋生态与人类健康的复杂链条。中国地质大学(武汉)环境学院孔少飞团队联合湖北省大气复合污染研究中心,在《地球科学》发表综述论文,总结了源排放大气气溶胶中可溶性铁的理化特性、形成机制与排放清单构建方法,为改进气候和大气化学模型提供了关键支撑。

    . 追踪大气中的“隐形铁”:气溶胶中的可溶性铁. 科技导报, 2025 , 43 (20) : 5 -5 .
    . Science & Technology Review, 2025 , 43 (20) : 5 -5 .
    可溶性铁,这一看似微不足道的元素,正在连接起气候变化、海洋生态与人类健康的复杂链条。中国地质大学(武汉)环境学院孔少飞团队联合湖北省大气复合污染研究中心,在《地球科学》发表综述论文,总结了源排放大气气溶胶中可溶性铁的理化特性、形成机制与排放清单构建方法,为改进气候和大气化学模型提供了关键支撑。
    大气气溶胶中的可溶性铁能够调控海洋浮游植物的生长,对全球碳循环与气候具有深远影响。过去人们普遍认为海洋铁主要来自沙尘输入,而最新研究发现,人为燃烧源——包括燃煤、工业排放和生物质燃烧——在全球海洋可溶性铁沉降中贡献可达20%~80%。这些铁颗粒不仅能吸收太阳辐射、改变大气能量平衡,还能通过光化学反应生成强氧化性物质,促进二次气溶胶形成,从而影响空气质量与人体健康。
    研究团队梳理发现,铁的“溶解性”是决定其环境效应的核心变量。低pH的酸性环境、富含有机酸的气溶胶、细粒径颗粒和低温燃烧过程,均能显著提升铁的可溶性。其中,含硫或富氧条件可加速铁矿物转化为离子态,使其更易被生物利用。同时,小粒径气溶胶中的可溶性铁可在大气中停留更久、传输更远,成为远洋生态系统的重要“营养通道”。
    研究还揭示了一个关键问题:目前国际通用的铁排放清单多基于早期有限观测数据,未充分考虑燃料类型、燃烧温度及粒径分布等差异,导致模型模拟结果偏低。为此,研究团队建议建立统一的飞灰浸出实验标准,完善燃烧源可溶性铁的实测数据库,从而支撑更精准的全球铁沉降与气候模型计算。
    (来源于中国科技期刊卓越行动计划入选期刊:《地球科学》,2025,50(9))

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    • 首发时间:2025-12-29
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    小菇属 Mycena 11 5.26
    光柄菇属 Pluteus 5 2.39
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