泥沙研究2025，Vol.50Issue(2)：37-43,7.DOI:10.16239/j.cnki.0468-155x.2025.02.006
小浪底水库悬沙对溶解性有机质的吸附特征研究
Study on the adsorption characteristics of dissolved organic matter by suspended sediment in Xiaolangdi Reservoir
摘要
Abstract
The processes of suspended sediment adsorbing dissolved organic matter(DOM)can affect the ni-trogen cycle of aquatic ecosystems.In order to investigate the DOM components in water body and suspended sediments in Xiaolangdi Reservoir and the main factors affecting DOM adsorption by suspended sediment,UV-Vis spectroscopy was used to study the DOM characteristics in water body and suspended sediments.The methods of principal component analysis and redundancy analysis were used to analyze the relationship between DOM components and their sources,the relationship between DOM and the environmental factors.Through the simulation test of DOM adsorption by suspended sediment,the adsorption effects of two particle sizes under dif-ferent sediment concentrations and DOM concentrations were studied.The results show that the aromaticity of DOM in water body is higher than that in suspended sediment particles,and the humic acid is the main com-ponent of DOM.Conductivity and turbidity are the main environmental factors that affect the aromaticity of DOM in water and suspended sediment,respectively.The pseudo-second-order kinetic model can better de-scribe the processes of suspended sediment adsorbing DOM under different sediment concentrations and DOM concentrations.The equilibrium adsorption of DOM by suspended sediment decreases with the increasing of sediment concentration and increases with the increasing DOM concentration,especially in fine sediment.The results provide a scientific basis for elucidating the transport processes of DOM between water and sediment.关键词
悬沙/小浪底水库/溶解性有机质/冗余分析/环境因子Key words
suspended sediment/Xiaolangdi Reservoir/dissolved organic matter/redundancy analysis/environ-mental factor分类
水利科学引用本文复制引用
武俐,刘森,杨佳之,来梦媛,常苗..小浪底水库悬沙对溶解性有机质的吸附特征研究[J].泥沙研究,2025,50(2):37-43,7.基金项目
国家自然科学基金区域创新发展联合基金重点支持项目(U23A2016) （U23A2016）
河南省自然科学基金面上项目(232300421248) （232300421248）
