不同水源特征水库中溶解性有机物的光学特性对比OACSTPCD
Comparison of Optical Characteristics of Dissolved Organic Matter in Reservoirs with Different Water Source Characteristics
为考察A水库("引黄工程"水源水库)与B水库(普通类型水库)的溶解性有机物(DOM)在相对分子质量大小、组成特征及来源方面的差异,采用紫外-可见光谱技术以及三维荧光光谱技术结合平行因子分析法,针对A水库和B水库水体中DOM的吸收参数特征和荧光特征进行了研究.结果显示:A水库和B水库的DOM均有较强的自生源特征,但两水库的DOM在组成特征和来源上存在一定差异.B水库样本中存在长波类腐殖质C1(Ex=350 nm,Em=454 nm)、类色氨酸物质C2(Ex=300 nm,Em=361 nm)和类色氨酸C3(Ex=220 nm/250 nm,Em=347 nm)3 个荧光组分,而A水库样本中存在长波类腐殖质C1、类色氨酸物质C2 两个荧光组分,说明A水库的组成特征相对更加简单.DOM吸收参数特征分析显示,A水库水质状况良好,其DOM相对分子质量较大,主要来自自生源;而B水库处于富营养状态,其DOM相对分子质量较小,富里酸成分和水体芳香性较高,水生环境中维管束植物输入较为丰富,主要来自入库河流和自生源.光谱指标差异性分析显示,A水库DOM外源输入比例小于B水库,同时A水库的水质污染源更多以陆源输入为主.研究揭示了水库中DOM的光学特性,可反映水库的环境污染程度和富营养化程度,为进一步探究DOM在不同水源特征水库的环境行为特征及水库水质保护等提供参考.
To investigate the differences in dissolved organic matter(DOM)in terms of molecular weight,composition,and sources between the A reservoir(a reservoir that receives water from the"Yellow River Diversion Project")and B reservoir(general type reservoir),UV-visible spectroscopy(UV-vis)and three-dimensional fluorescence spectroscopy(EEMs)combined with parallel factor analysis were used to study the absorption and fluorescence characteristics of DOM in the water of the A reservoir and B reservoir.The results showed that both reservoirs had strong autochthonous characteristics in their DOM,but there were differences in composition and sources.In the B reservoir samples,there were three fluorescence components:a long-wavelength humic-like substance C1(Ex=350 nm,Em=454 nm),a tryptophan-like substance C2(Ex=300 nm,Em=361 nm),and a tryptophan-like substance C3(Ex=220 nm/250 nm,Em=347 nm).In the A Reservoir samples,there were two fluorescence components:a long-wavelength humic-like substance C1 and a tryptophan-like substance C2,indicating that the composition of DOM in the A reservoir was relatively simpler.Analysis of the absorption characteristics of DOM showed that the water quality of the A reservoir was good,with larger molecular weight DOM mainly derived from autochthonous sources,while the B reservoir was in a eutrophic state,with smaller molecular weight DOM,higher fulvic acid content,and higher water aromaticity,mainly derived from inflowing rivers and autochthonous sources.Analysis of spectral indices showed that the proportion of exogenous input of DOM in the A reservoir was smaller than that in the B reservoir,and the pollution sources in the A reservoir were mainly from terrestrial inputs.The study reveals that the optical properties of DOM in reservoirs can reflect the degree of environmental pollution and eutrophication in reservoirs,which provides reference for further investigation of the environmental behavior characteristics of DOM in reservoirs with different water source characteristics and the protection of water quality in reservoirs.
孙贤鹏;赵燕景;杨永锐;史建超;刘旭阳
青岛市排水运营服务中心,山东青岛 266000||青岛市海润自来水集团有限公司,山东青岛 266000烟台大学土木工程学院,山东烟台 264003青岛百发海水淡化有限公司,山东青岛 266041
土木建筑
引黄工程水源水库溶解性有机物(DOM)三维荧光光谱紫外-可见光谱技术平行因子分析
Yellow River Diversion Projectsource water reservoirdissolved organic matter(DOM)three-dimensional fluorescence spectroscopyUV-visible spectroscopy(UV-vis)parallel factor analysis
《净水技术》 2024 (005)
61-70 / 10
山东省自然科学基金(ZR2020QE225)
评论