Manganese(III) dominants the mobilization of phosphorus in reducing sediments: Evidence from Aha reservoir, Southwest China

被引：0
|
作者：
Chen, Quan [1 ,2 ,6 ]
Wang, Jing-fu [1 ,2 ,6 ]
Zhu, Meng-qiang [3 ]
Qin, Hai-bo [1 ,2 ]
Liao, Peng [1 ,2 ,6 ]
Lu, Zhi-tong [2 ,4 ]
Ju, Peng-cheng [5 ]
Chen, Jing-an [1 ,2 ,6 ]
机构：
[1] State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang,550081, China
[2] University of Chinese Academy of Sciences, Beijing,100049, China
[3] Department of Geology, University of Maryland, College Park, MD,20740, United States
[4] State Key Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences, Institute of Geochemistry, Guiyang,550081, China
[5] State Key Laboratory of Continental Dynamics and Shaanxi Key Laboratory of Early Life and Environment, Department of Geology, Northwest University, Xi'an,710069, China
[6] Guizhou Province Field Scientific Observation and Research Station of Hongfeng Lake Reservoir Ecosystem, Guiyang,551499, China
来源：
Science of the Total Environment | 2024年 / 954卷
基金：
美国国家科学基金会;
关键词：
Manganese - Manganese mines - Oxic sediments - Redox reactions - X ray photoelectron spectroscopy;
D O I：
10.1016/j.scitotenv.2024.176564
中图分类号：
学科分类号：
摘要：
Eutrophication has become one of the greatest threats to aquatic ecosystems. The release of phosphorus (P) from sediments exerts a critical role on eutrophication level. Both manganese (Mn) and iron (Fe), sensitive to redox conditions, own strong affinity for P. Numerous works have demonstrated that Fe was a key factor to drive P cycle in sediments. However, the role of Mn on P mobilization remains largely unexplored. Herein, the mechanism of P mobilization driven by Mn were investigated in a seasonal anoxic reservoir. Diffusive gradients in thin films (DGT) results, from both field investigations and laboratory incubations, showed P was synchronously distributed and significantly positive correlated (r2 ≥ 0.40, p 99.2 %) in reducing sediments. This study significantly expanded our knowledge on the geochemical behavior of P influenced by Mn in aquatic sediments. © 2024 Elsevier B.V.
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