岩矿测试2025，Vol.44Issue(5)：926-936,11.DOI:10.15898/j.ykcs.202503170048
不同母质土壤铁铝氧化物-有机碳的相互作用以及对重金属迁移的影响
Interaction between Iron-Aluminum Oxides and Organic Carbon in Soils with Different Parent Materials and Its Influence on Heavy Metal Migration
摘要
Abstract
Iron-aluminum oxides,as significant mineral components,exhibit a notable influence on the organic carbon content in soil.The interaction between these two elements constitutes a crucial aspect of soil environmental processes,particularly in the migration and transformation of heavy metals.This study focuses on soils developed from aeolian and alluvial-pluvial parent materials in Heilongjiang Province.By analyzing the distribution characteristics of various forms of iron-aluminum oxides and organic carbon content in different soil profiles,correlation analysis and redundancy analysis was employed to investigate the interactions between iron-aluminum oxides and organic carbon,as well as their manifestations in different parent material soils.Furthermore,the correlations with heavy metal elements were analyzed.Through comparative analysis,certain differences in the vertical distribution of iron-aluminum oxides were observed,while the vertical changes in organic carbon content were similar.Correlation analysis revealed that complexed alumina(Alp)and free alumina(Ald)exhibited a stronger positive correlation with organic carbon compared to other forms.Complexed iron-aluminum oxides demonstrated a significant correlation with most heavy metal elements.Furthermore,complexed iron oxide(Fep),free iron oxide(Fed),amorphous iron oxide(Feo),and Alp showed a significant positive correlation with Hg,while amorphous alumina(Alo)correlated positively with As and Ni.Analysis suggests that in soils derived from alluvial-pluvial parent materials,the low pH environment promotes higher levels of free and complexed iron-aluminum oxides,facilitating stronger binding with organic carbon to form more stable complexes.Conversely,in the soils developed from aeolian parent materials,due to the high pH,the dissolution of iron-aluminum oxides is inhibited,and the concentrations of free and complexed iron-aluminum oxides are low,thereby reducing the binding capacity with organic carbon and resulting in a higher organic carbon content.Further analysis indicates that iron-aluminum oxides and their organic carbon complexes interact with heavy metal elements through complexation,adsorption,and co-precipitation,thereby influencing heavy metal migration and accumulation in soil.关键词
冲洪积母质/风积母质/铁铝氧化物形态/有机碳/重金属/元素迁移Key words
alluvial-pluvial parent material/aeolian parent material/iron-aluminium oxide forms/organic carbon/heavy metals/element migration分类
环境科学引用本文复制引用
宋运红,刘凯,戴慧敏,杨凤超,张哲寰..不同母质土壤铁铝氧化物-有机碳的相互作用以及对重金属迁移的影响[J].岩矿测试,2025,44(5):926-936,11.基金项目
中国地质调查局东北地质科技创新中心区创基金项目(QCJJ2023-54) （QCJJ2023-54）
中国地质调查局地质调查项目"松辽平原黑土地生态地质调查"(DD20221779) （DD20221779）
