College of Life Sciences and Technology, Harbin Normal University, Harbin 150025, China; College of Life Science, Northeast Agricultural University, Heilongjiang 150030, China; Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
College of Life Science, Northeast Agricultural University, Heilongjiang 150030, China.
J Hazard Mater. 2022 Oct 15;440:129758. doi: 10.1016/j.jhazmat.2022.129758. Epub 2022 Aug 10.
Fulvic acid which could govern the environmental geochemistry behavior of heavy metals is considered as the eco-friendly substances for controlling heavy metal pollutants in environment. Knowledge on the individual fulvic acid ligand is crucial to characterize the effect of fulvic acid on the migration and toxicity of metal pollutants. Herein, fulvic acid substances were analyzed by fluorescence quenching associated with parallel factor analysis (PARAFAC). Three components were identified based on PARAFAC. Furthermore, two-dimensional correlation spectroscopy (2DCOS) associated with complexation model were used to elucidate the Cd(II)- and Cu(II)-binding characteristics of the individual fulvic acid ligand. The Cd(II)- and Cu(II)-binding capability and speed of different fulvic acid ligands were revealed and theoretical guidance and technical support were provided for the practical application. The Cd(II) contaminated soil could be amended with high fulvic acid ligands A1 and Y2 containing composting products and the Cu(II) contaminated soil could be amended with high fulvic acid ligands Y1, T1 and A1 containing composting products to control the pollution and improve the soil condition. Based on these excellent results, the different fulvic acid ligands-contaminants-binding properties was characterized for the theoretical supporting of environmental pollution control.
富里酸可以控制重金属的环境地球化学行为，被认为是控制环境中重金属污染物的环保物质。了解单个富里酸配体的特性对于描述富里酸对金属污染物迁移和毒性的影响至关重要。在此，通过荧光猝灭结合平行因子分析（PARAFAC）对富里酸物质进行了分析。基于 PARAFAC 确定了三个组分。此外，还使用二维相关光谱（2DCOS）结合络合模型来阐明单个富里酸配体与 Cd(II)和 Cu(II)的结合特性。揭示了不同富里酸配体对 Cd(II)和 Cu(II)的结合能力和结合速度，为实际应用提供了理论指导和技术支持。可以用含有高富里酸配体 A1 和 Y2 的堆肥产品来改良 Cd(II)污染的土壤，用含有高富里酸配体 Y1、T1 和 A1 的堆肥产品来改良 Cu(II)污染的土壤，以控制污染并改善土壤状况。基于这些优异的结果，对不同富里酸配体-污染物的结合特性进行了表征，为环境污染控制提供了理论支持。
