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Review of the structural properties and interfacial reactions of Al-substituted goethite, hematite and ferrihydrite

文献类型： 外文期刊

作者： Liang, Yu 1 ; Chen, Hongfeng 2 ; Xu, Jinling 3 ; Wang, Mingxia 4 ; Tan, Wenfeng 4 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 571101, Peoples R China

2.China Three Gorges Univ, Hubei Field Observat & Sci Res Stn Water Ecosyst G, Yichang 443002, Peoples R China

3.Shandong Normal Univ, Coll Geog & Environm, Jinan 250358, Peoples R China

4.Huazhong Agr Univ, Coll Resources & Environm, State Environm Protect Key Lab Soil Hlth & Green R, Wuhan 430070, Peoples R China

关键词： adsorption; defective structure; iron (hydro)oxide; isomorphic substitution; surface active site; surface charge behavior

期刊名称：PEDOSPHERE （ 影响因子：7.3； 五年影响因子：6.2 ）

ISSN： 1002-0160

年卷期： 2025 年 35 卷 1 期

页码：

收录情况： SCI

摘要： Isomorphic substitution of ferric ion (Fe3+) by aluminum ion (Al3+) in iron (hydro)oxides is ubiquitous in natural environments. Aluminum substitution inevitably leads to changes in the microstructures, physicochemical properties, and surface reactions of iron (hydro)oxides, which may have great impacts on the sequestration of nutrients and contaminants in soils and aquatic environments. Over the past decades, the structural properties and surface reactivity of Al-substituted iron (hydro)oxides have been intensively studied. Iron (hydro)oxides in various structural forms and with different Al substitution amounts present high application potentials in addressing environmental issues. A timely summary of the structural properties and interfacial reactions of the most common and representative Al-substituted iron (hydro)oxides is of significance. Herein, the effects of Al substitution on the structural properties and surface activities of iron (hydro)oxides were clarified according to the microstructure, crystal facets, surface site type and density, interfacial reaction mechanisms, and modeling parameters of iron (hydro)oxides. This review systematically elucidates how Al substitution affects the structural properties and surface reactions of iron (hydro)oxides, including the well crystallized goethite and hematite and the poorly crystallized ferrihydrite, providing theoretical guidance for further exploration of the mineralogical characteristics and environmental geochemical behaviors of iron (hydro)oxides.

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