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吸附和共沉降二碳酸盐与铁酸盐的独特光化学:对铁的还原性溶解和碳稳定性的影响

Qingchao Li¹, Yu Fu¹, Lingli Wang¹

¹Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.

The Science of the total environment

|April 12, 2024

概括

铁 (FH) 与有机酸 (LMWOAs) 的光溶解取决于它们如何结合. 与吸附的LMWOA相比,共同沉积的FH-LMWOA显示出不同的光化学反应,影响铁氧化还原循环.

科学领域:

环境地质化学环境地质化学
摄影化学的使用
矿物学是什么?矿物学是什么?

背景情况:

已知通过低分子量有机酸 (LMWOAs) 促进化 (FH) 的联体光溶解.
共同沉的FH-LMWOAs协会的光化学仍然不太了解,尽管它们在碳保留中的重要性很重要.
了解这些关联对于矿物有机界面的铁氧化还原循环至关重要.

研究的目的:

为了研究铁酸盐-LMWOAs协会 (FLAs) 的光溶解动力学.
在FH和溶解Fe-LMWOAs复合体上比较共沉积的FLA与吸附的LMWOAs的光化学.
阐明LMWOA的关联模式和配置对FH光反活性的作用.

主要方法:

在环中性条件下合成FLA.
监测Fe(II) 的形成和有机碳衰变,以评估光溶解动力学.
描述LMWOAs的关联模式 (吸附与共降) 和FH上的配置.

主要成果:

在水性复合物中的Fe (II) 产量取决于LMWOA度和基质性质.
吸附的FH-oxalate的内部球单核双形态配置具有高度的光反应性.
共同沉的FLAs显示出增强的Fe(II) 产量,具有较高的LMWOA含量,与中度含量不同,由于各种联结模式和连接物可用性.

结论:

协会的模式 (吸附与共降) 和LMWOAs的配置显著影响FH光化学.
共同沉引入了与表面吸附一起的内部包含,改变了光反活性.
这些发现凸显了矿物有机联体中铁氧化还原循环的复杂性.

关键词:

铁化酸盐的使用方法马洛酸是一种不良的药物.氧沙酸盐是一种氧化酸盐.摄影还原溶解的方法激进分子激进分子

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