• 关键词：溶解有机质(DOM)  周村水库  光谱特征  紫外-可见光谱  三维荧光光谱

• 基金项目：国家自然科学基金（No.51478378，51909056）；国家科技支撑计划项目（No.2012BAC04B02）；河北科技大学引进人才科研启动基金项目（No.1181278）

• 周石磊
• 河北科技大学环境科学与工程学院, 河北省污染防治生物技术实验室, 石家庄 050018

• 孙悦
• 河北科技大学环境科学与工程学院, 河北省污染防治生物技术实验室, 石家庄 050018

• 张艺冉
• 河北科技大学环境科学与工程学院, 河北省污染防治生物技术实验室, 石家庄 050018

• 黄廷林
• 西安建筑科技大学环境与市政工程学院, 西安 710055

• 丛海兵
• 扬州大学环境科学与工程学院, 扬州 225009

• 崔建升
• 河北科技大学环境科学与工程学院, 河北省污染防治生物技术实验室, 石家庄 050018

• 李再兴
• 河北科技大学环境科学与工程学院, 河北省污染防治生物技术实验室, 石家庄 050018

• 罗晓
• 河北科技大学环境科学与工程学院, 河北省污染防治生物技术实验室, 石家庄 050018

• 摘要：运用三维荧光光谱（EEMs）技术结合平行因子分析法（PARAFAC）及紫外-可见光谱技术（UV-vis），对周村水库四季变化过程中溶解性有机物（DOM）的分布及光谱特征进行了分析.结果表明：周村水库表层水体的氮素（总氮和溶解性总氮）和有机物（总有机碳和溶解性有机碳）的季节性差异显著，并且水库冬、春两季TN较多、TOC较少；表层水体DOM夏、秋两季的吸收系数a₂₅₄ 和a₃₅₅均高于冬、春季节，与有机物的分布相一致；四季的E3/E4均大于3.5，说明DOM以富里酸为主，E2/E3比值表明富里酸占DOM的比例夏、秋两季高于冬、春季节，除夏季外水库表层水体S_R均大于1，显示DOM主要为生物源；三维荧光通过PARAFAC解析出3种组分，分别为类腐殖质（C1）、可见区富里酸（C2）和类蛋白（C3）；对3个组分进行相关性分析，结果显示，C1、C2、C3之间具有显著的相关性（p<0.01）；DOM的总荧光强度及各组分的荧光强度均呈现出夏秋季高、冬春季低的特征，总荧光强度最大值为夏季的（1993.52±40.84） A.U.，最小值为春季的（1074.10±113.63） A.U.；周村水库各个季节间的DOM总荧光强度和荧光组分C1的荧光强度除夏、秋外均呈现显著的差异性（p<0.05），组分C2和C3的荧光强度均呈现显著差异性（p<0.05）；周村水库四季的DOM生物源指数（BIX）为0.8~1.0，表明水库DOM具有较强的自生源特征，与腐殖程度指标（HIX）的结果相吻合；PCA分析显示，周村水库表层水体DOM的光谱特征差异明显，夏、秋两季的DOM光谱特征相近，冬、春两季的水体DOM特征相似；并且组分C1、C2、C3与DOM特征参数（FI、β：α）及溶解性有机碳（DOC）呈显著相关性（p<0.01）.通过对周村水库水体四季的DOM光谱特征进行研究，可以进一步分析水库水体的有机物污染特征，并为水库水质管理提供技术支持.

• Abstract：Based on excitation emission matrix spectroscopy (EEMs) technology combined with the parallel factor analysis (PARAFAC), and UV-vis spectra, we analyzed the impact of seasonal variations on distribution and spectral characteristics of DOM in Zhoucun Reservoir. Results showed that the concentration of nitrogen and organic matter exhibited significant seasonal difference, and the reservoir has more TN and less TOC in winter and spring. The a₂₅₄ and a₃₅₅ in summer and autumn were both higher than those in winter and spring, which was consistent with the changes of organic matter. The E3/E4>3.5, showed that the fulvic acid accounted for the majority proportion in DOM. The concentrations of fulvic acid in summer and autumn were higher than those in winter and spring based on E2/E3, moreover, the S_R>1 indicated the DOM exhibited autochthonous characteristics (except summer). One humic-like substances(C1), one fulvic-like substances(C2) and one protein-like substance (C3) were identified by PARAFAC model, and there exhibited significantly correlation coefficient (p<0.01) in C1&C2&C3. Total fluorescence intensity and the fluorescence intensity of each component exhibited high concentration for summer and autumn and low concentration for winter and spring distribution characteristics, and the maximum value occurred in summer with (1993.52±40.84) A.U., and the minimum value occurred in spring with (1074.10±113.63) A.U.. Total fluorescence intensity and the fluorescence intensity of each component (except total fluorescence and C1 in summer and autumn) exhibited significant seasonal difference (p<0.05). The DOM exhibited strong autochthonous component characteristics based on BIX and HIX indexes. PCA showed that the spectral characteristics exhibited obvious difference in the whole year, and the DOM spectral characteristics of summer and autumn are similar, and the DOM characteristics of water in winter and spring are similar. Moreover, the C1, C2 and C3 exhibited significantly correlation coefficient (p<0.01) with DOM indices (FI, β:α) and DOC. From all the results, it could contribute to explore and control the organic carbon pollution sources for the managers of Zhoucun Reservoir in the future.

• Key words：dissolved organic matter(DOM)  Zhoucun Reservoir  spectral characteristic  UV-vis spectrum  excitation emission matrix spectroscopy(EEMs)

• 
  摘要点击次数： 871 全文下载次数： 802