溶解性有机质与铅、砷相互作用研究  

Study on the Interaction of Dissolved Organic Matter with Lead and Arsenic

作　　者：何茜 程乔 欧阳文娟[2] 冯艾荣 胡艳云[3] 冯景伟[4] 张浏[5] 尹浩[3] 郑刘根[1] HE Xi;CHENG Qiao;OUYANG Wenjuan;FENG Airong;HU Yanyun;FENG Jingwei;ZHANG Liu;YIN Hao;ZHENG Liugen(Anhui Province Engineering Laboratory for Mine Ecological Remediation,School of Resources and Environmental Engineering,Anhui University,Hefei 230601,China;Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;Instruments’Center for Physical Science,University of Science and Technology of China,Hefei 230026,China;Anhui Provincial Engineering Laboratory for Rural Water Environment and Resources,School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Research Academy for Environmental Science,Hefei 230071,China)

机构地区：[1]安徽大学资源与环境工程学院,安徽省矿山生态修复工程实验室,安徽合肥230601 [2]中国科学院重庆绿色智能技术研究院,重庆400714 [3]中国科学技术大学理化科学实验中心,安徽合肥230026 [4]合肥工业大学土木与水利工程学院,安徽省农村水环境治理与水资源利用工程实验室,安徽合肥230009 [5]安徽省环境科学研究院,安徽合肥230071

出　　处：《环境科学与技术》2024年第6期94-104,共11页Environmental Science & Technology

基　　金：国家科技重大专项:清水廊道技术评价体系构建(2017ZX07603-004-03);重庆市自然科学基金面上项目:蓝藻水华过程水体溶解性有机磷的来源及其微生物降解途径研究(CSTB2022NSCQ-MSX0599)。

摘　　要：为研究天然水体中有机质与砷(As)、铅(Pb)相互作用,文章以标准溶解性有机质(标准DOM)为研究对象,利用光谱、超高分辨率质谱分析、平行因子分析法等方法进行分析。结果表明:(1)与类富里酸和腐殖质相比,类蛋白质酪氨酸类与As、Pb表现出更高结合能力。(2)超高分辨率质谱检测结果显示,重金属能够改变标准DOM原有特性,使得有机质发生转变,如氨基糖类组分减少,类单宁组分增加,CHO相对丰度减少,其他杂原子相对丰度增加。(3)DOM-As显示紫外特征参数a254和荧光特征参数HIX具有强正相关性,通过超高分辨质谱仪获得的氨基糖组分、CHO与紫外特征参数a254、a260、a280、荧光特征参数HIX均具有正相关性,荧光组分C1和质谱获得的不饱和烃类组分具有正相关性。研究结果可为定量评估水体中有机质-重金属相互作用机理提供理论支撑,从而减少重金属等各种污染物的环境行为。In order to study the interaction of organic matter with arsenic(As)and lead(Pb)in natural water,standard dissolved organic matter(standard DOM)was taken as the research object,and the analysis was carried out by spectroscopy,high-resolution mass spectrometry,parallel factor analysis and other methods.The results showed that compared with fulvic acids and humus,protein-like tyrosines showed higher binding capacity to As and Pb.The results of high-resolution mass spectrometry showed that heavy metals could change the original characteristics of the standard DOM,resulting in the transformation of organic matter,such as the decrease of amino carbohydrate components,the increase of tannin-like components,the decrease of the relative abundance of CHO,and the increase of the relative abundance of other heteroatoms.DOM-As showed that there was a strong positive correlation between the ultraviolet characteristic parameter a254 and the fluorescence characteristic parameter HIX,the amino sugar component and CHO obtained by ultra-high resolution mass spectrometry were positively correlated with the ultraviolet characteristic parameters a254,a260,a280 and the fluorescence characteristic parameter HIX,and the fluorescence component C1 was positively correlated with the unsaturated hydrocarbon component obtained by mass spectrometry.The results of the study may provide theoretical support for the quantitative assess⁃ment of the mechanism of organic matter-heavy metal interactions in water bodies,thereby reducing the environmental behav⁃ior of various pollutants such as heavy metals.

关 键 词：溶解性有机质 重金属 平行因子分析 超高分辨率质谱 

分 类 号：X52[环境科学与工程—环境工程]