基于三维荧光光谱的丰水期高铁锰地下水溶解性有机质组成特征及其指示意义——以洞庭湖区典型垸区为例

黄荷; 阮玲; 李娜; 何诗颖; 谌宏伟; 潘雨齐

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中国环境科学 ›› 2026, Vol. 46 ›› Issue (2) : 953-962.

环境生态

基于三维荧光光谱的丰水期高铁锰地下水溶解性有机质组成特征及其指示意义——以洞庭湖区典型垸区为例

黄荷^1,2, 阮玲^1,2, 李娜³, 何诗颖^1,2, 谌宏伟^1,2, 潘雨齐³

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Compositional characteristics and its indicative significance of dissolved organic matter in high iron and manganese groundwater during the wet season based on three-dimensional fluorescence spectroscopy—A case study of typical embankment areas in Dongting Lake Area

HUANG He^1,2, RUAN Ling^1,2, LI Na³, HE Shi-Ying^1,2, CHEN Hong-Wei^1,2, PAN Yu-Qi³

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摘要

于丰水期采集洞庭湖区典型垸区(包括育乐垸、大通湖垸、共双茶垸)高铁锰地下水样品开展三维荧光光谱测试分析,结合荧光区域积分法(FRI)和平行因子分析法(PARAFAC)系统解析溶解性有机质(DOM)组成特征并尝试探索其对铁锰迁移富集的影响.样品分析结果表明,丰水期地下水DOC, Fe, Mn浓度范围分别为8.48~13.47, 1.15~14.85和0.07~2.17mg/L,其中仅DOC, Mn浓度表现出自西北(远离湖区)往东南(靠近湖区)升高的显著空间分异规律.有机质光谱指数指示研究区丰水期地下水DOM组成总体具有较强的腐殖质特征和微生物源特征,但其比例表现为自西北往东南方向逐渐降低,荧光区域积分法及平行因子分析法定量计算得到靠近湖区的东南区域(地下水C组样品)荧光区域III+V占比可达42%, 类腐殖质C1+C3组分比例则为62%.相关性分析与主成分分析结果指示,丰水期地下水中Fe的迁移富集主要受微生物源的类腐殖质组分影响,而Mn或与外源输入的类蛋白质组分更为相关.

Abstract

High iron and manganese groundwater samples were collected during the wet season from typical embankment areas (including Yule, Datonghu, and Gongshuangcha) in Dongting Lake Area and then analyzed by three-dimensional fluorescence spectroscopy. The fluorescence regional integration method (FRI) and the parallel factor analysis method (PARAFAC) were combined to systematically analyze the composition characteristics of DOM and its influence on the migration and enrichment of Fe and Mn. The results showed that the concentration ranges of DOC, Fe, and Mn in the groundwater during the wet season were 8.48~13.47, 1.15~14.85, and 0.07~2.17mg/L, respectively. Among them, only DOC and Mn concentrations showed a significant spatial pattern of increasing from the northwest (far away from the lake area) to the southeast (close to the lake area). The spectral index of organic matter indicated that the DOM composition of the groundwater during the wet season in the study area had strong humus characteristics and microbial source characteristics, but its proportion gradually decreased from the northwest to the southeast. The FRI and PARAFAC analysis quantitatively calculated that the proportion of fluorescence region III+V in the southeastern region near the lake area (Group C samples) was 42%, and the proportion of humus-like C1+C3components was 62%. The results of correlation analysis and principal component analysis indicated that the migration and enrichment of Fe in groundwater during the wet season was mainly influenced by humic-like components of microbial origin, while Mn might be more related to protein-like components of exogenous input.

导出引用

黄荷, 阮玲, 李娜, 何诗颖, 谌宏伟, 潘雨齐. 基于三维荧光光谱的丰水期高铁锰地下水溶解性有机质组成特征及其指示意义——以洞庭湖区典型垸区为例[J]. 中国环境科学. 2026, 46(2): 953-962

HUANG He, RUAN Ling, LI Na, HE Shi-Ying, CHEN Hong-Wei, PAN Yu-Qi. Compositional characteristics and its indicative significance of dissolved organic matter in high iron and manganese groundwater during the wet season based on three-dimensional fluorescence spectroscopy—A case study of typical embankment areas in Dongting Lake Area[J]. China Environmental Science. 2026, 46(2): 953-962

中图分类号： X523

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