淮河中游枯水期水体溶解性有机质光谱特征  

Spectral characteristics of dissolved organic matter in the middle reaches of Huai River during dry season

作　　者：陈旭东 高良敏[1] 顾昕 陈晓晴[1] 庞振东[3] CHEN Xudong;GAO Liangmin;GU Xin;CHEN Xiaoqing;PANG Zhendong(School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001;Jiangsu Geological Prospecting Team Three,Changzhou Jiangsu 213003;Environmental Protection Monitoring Station of Huainan City,Huainan Anhui 232001)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]江苏煤炭地质勘探三队,江苏常州213003 [3]淮南市环境保护监测站,安徽淮南232001

出　　处：《环境污染与防治》2022年第10期1368-1373,共6页Environmental Pollution & Control

基　　金：安徽省重点研究与开发计划项目生态环境专项(No.202004i07020012)。

摘　　要：采用紫外—可见吸收光谱和三维荧光光谱结合平行因子法(PARAFAC)研究淮河中游枯水期水体中溶解性有机质(DOM)的含量与构成分布特征。结果表明:霍邱县、潘集区(PJ)和怀远县水体中磷主要以颗粒态存在,所有研究区域氮素以总溶解性氮为主;PARAFAC模型解析出3个有意义的化学组分(类富里酸、陆源类胡敏酸(C2)和类色氨酸);PJ由于光伏板覆盖水面削弱了水体的光化学氧化作用,C2相对丰度与荧光强度显著高于其他区域(P<0.05,LSD),且DOM分子量、腐殖化程度和疏水性也远高于其他区域(P<0.05,LSD)。The methods of ultraviolet-visible absorption spectroscopy and excitation-emission matrix spectroscopy combined with parallel factor analysis(PARAFAC)were used to analyze the change of dissolved organic matter(DOM)content and composition of water bodies in the middle reaches of Huai River during the dry season.The results indicated that phosphorus mainly existed in granular form in Huoqiu County,Panji District(PJ)and Huaiyuan County.The total dissolved nitrogen was the main nitrogen form in all regions.Three chemical compositions included fulvic-like,components terrestrial humic-like(C2)and tryptophan-like components were analyzed by the PARAFAC model.The photochemical oxidation of water was weakened by a large area of photovoltaic panels covering the water surface in PJ.The relative abundance and fluorescence intensity of C2 in PJ were significantly higher than those in other regions(P<0.05,LSD),and the molecular weight,humification,and hydrophobicity of DOM were higher than those in other regions(P<0.05,LSD).

关 键 词：溶解性有机质 紫外—可见吸收光谱 三维荧光光谱 平行因子法 

分 类 号：X52[环境科学与工程—环境工程]