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湖南锡矿山锑矿区水环境中DOM三维荧光特征及其对锑污染的指示意义

李琬钰 周建伟 贾晓岑 唐沛东

李琬钰, 周建伟, 贾晓岑, 唐沛东. 湖南锡矿山锑矿区水环境中DOM三维荧光特征及其对锑污染的指示意义[J]. 地质科技通报, 2022, 41(4): 215-224. doi: 10.19509/j.cnki.dzkq.2022.0119
引用本文: 李琬钰, 周建伟, 贾晓岑, 唐沛东. 湖南锡矿山锑矿区水环境中DOM三维荧光特征及其对锑污染的指示意义[J]. 地质科技通报, 2022, 41(4): 215-224. doi: 10.19509/j.cnki.dzkq.2022.0119
Li Wanyu, Zhou Jianwei, Jia Xiaocen, Tang Peidong. EEMs characteristics of dissolved organic matter in water environment and its implications for antimony contamination in antimony mine of Xikuangshan, Hunan Province[J]. Bulletin of Geological Science and Technology, 2022, 41(4): 215-224. doi: 10.19509/j.cnki.dzkq.2022.0119
Citation: Li Wanyu, Zhou Jianwei, Jia Xiaocen, Tang Peidong. EEMs characteristics of dissolved organic matter in water environment and its implications for antimony contamination in antimony mine of Xikuangshan, Hunan Province[J]. Bulletin of Geological Science and Technology, 2022, 41(4): 215-224. doi: 10.19509/j.cnki.dzkq.2022.0119

湖南锡矿山锑矿区水环境中DOM三维荧光特征及其对锑污染的指示意义

doi: 10.19509/j.cnki.dzkq.2022.0119
基金项目: 

国家自然科学基金项目 41572344

详细信息
    作者简介:

    李琬钰(1996—),女,现正攻读水文地质学专业硕士学位,主要从事地下水污染与防治、锑的水文地球化学循环等方面的研究工作。E-mail: wy_li@cug.edu.cn

    通讯作者:

    周建伟(1975—),男,教授,博士生导师,主要从事矿区污染防控与生态修复治理等方面教学与科研工作。E-mail:jw.zhou@cug.edu.cn

  • 中图分类号: X523

EEMs characteristics of dissolved organic matter in water environment and its implications for antimony contamination in antimony mine of Xikuangshan, Hunan Province

  • 摘要:

    溶解性有机质(dissolved organic matter, 简称DOM)是影响锑迁移转化的重要因素之一。湖南锡矿山锑矿是世界最大的锑矿, 水环境中锑污染情况严重。为查明锡矿山矿区水环境中DOM特征及其影响, 对锡矿山水环境样品进行三维荧光分析, 利用平行因子法提取水环境中天然有机组分, 分析荧光特征, 探究各组分之间与锑的相关关系。分析表明, 矿区水体环境中DOM以低腐殖化、陆源与微生物源混合来源为特点, 多数水样以陆源有机物为主。锡矿山锑矿区水体中包括了3种不同的组分: C1组分为陆源类腐殖质, C2组分为醌类腐殖质, C3组分为类蛋白质(酪氨酸); 水环境中C1组分相对含量最高, 地表水中C3组分相对含量高于地下水。研究认为, 存在以下途径影响地下水环境中锑的释放: ①类蛋白质组分与锑的络合促进锑的溶解释放; ②腐殖质组分与锑的直接络合。低锑地表水中天然有机组分相对含量受稀释作用的影响, 高锑地表水中天然有机组分相对含量对锑的来源有一定的指示作用。

     

  • 图 1  研究区采样点分布图

    Figure 1.  Sampling sites for surface water and groundwater in the study area

    图 2  研究区地下水与地表水水化学Piper三线图

    Figure 2.  Piper diagram of groundwater and surface water in the study area

    图 3  研究区主要离子相关性分析图

    Figure 3.  Correlation analysis of major ions in the study area

    图 4  研究区地下水、地表水中BIXHIX(a),SUVA254SUVA260(b)的关系

    Figure 4.  Relationship between the BIX and HIX value (a), SUVA254 and SUVA260 value (b) of surface water and groundwater in the study area

    图 5  平行因子法鉴别出的3个荧光组分及其荧光特征

    Figure 5.  Spectral characteristics of the 3 components model identified by EEM-PARAFAC in the water environment

    图 6  研究区地下水与地表水中DOM各组分相对含量

    Figure 6.  Relative content of each component of DOM in groundwater and surface water of the study area

    图 7  锡矿山水环境中FISUVA254、天然有机组分的相对含量与ρ(Sb)的关系

    Figure 7.  Relationships between Sb concentration and FI, SUVA254, and relative content of natural organic components in the water environment of the study area

    图 8  研究区地表水中天然有机组分相对含量及ρ(Sb)沿程分布

    Figure 8.  Relative content of natural organic components and the distribution of Sb concentration along the flow direction in the surface water of the study area

    表  1  研究区地下水、地表水指标统计

    Table  1.   Statistics of indexes of groundwater and surface water in the study area

    指标 锡矿山组 佘田桥组 地表水
    最大值 最小值 平均值 最大值 最小值 平均值 最大值 最小值 平均值
    pH 7.44 6.16 7.06 7.03 6.42 6.82 9.19 4.31 7.85
    EC/(μS·cm-1) 1 237.0 231.0 593.0 1 119.0 189.4 570.0 1 018.0 297.0 588.7
    Sb 2.70 0.015 0.49 7.45 0.51 2.51 5.39 0.028 1.60
    HCO3- 492.3 45.4 251.1 257.5 36.4 153.3 181.8 104.5 146.0
    SO42- 228.90 26.36 77.48 381.51 65.83 138.90 997.60 34.57 246.66
    Cl- 27.42 4.41 8.09 8.85 3.10 5.27 293.66 3.60 25.67
    Na+ 54.60 1.16 14.38 67.97 0.97 16.60 310.35 1.78 44.73
    Ca2+ ρB/(mg·L-1) 128.72 27.64 78.51 124.85 22.61 72.86 160.16 36.66 73.15
    K+ 9.72 0.78 3.62 5.57 1.22 3.73 9.40 1.63 4.25
    Mg2+ 17.57 3.04 7.21 14.80 2.92 7.92 26.67 2.53 9.03
    DOC 2.276 0.565 1.120 1.663 0.567 1.134 2.294 0.880 1.374
    HIX 6.44 0.58 3.06 7.91 1.75 5.08 6.09 0.64 2.48
    BIX 1.16 0.71 0.87 0.97 0.74 0.85 0.98 0.70 0.78
    FI 1.90 1.52 1.65 1.75 1.57 1.66 1.67 1.51 1.57
    SUVA254 2.00 -0.49 0.54 1.66 0 0.77 3.28 1.26 2.13
    注: HIX.腐殖化指数; BIX.生物指数; FI.荧光指数; SUVA254.254 nm处UV的吸光系数与DOC浓度的比值
    下载: 导出CSV

    表  2  锡矿山水体中3个荧光组分特征及与前人研究确定组分的对比

    Table  2.   Characteristics of three components in the water environment of study area and their comparison with previously identified components

    组分 (Ex/Em)/nm 本研究中DOM组分 前人研究中DOM组分描述
    C1 235(295)/414 陆源类腐殖质 C2: < 240/416,类腐殖酸[7];
    C1: < 236~260/400~500,陆源腐殖质[32];
    C2:225(330)/410,陆地来源[36]
    C2 260/464 腐殖质类,醌类 C2: < 240~275/434~520,腐殖质类[32];
    C3: < 250,366/468,醌类[25];
    SQ2:270(375)/462,还原醌类[33]
    C3 220(270)/306 类蛋白质(酪氨酸) 220(270)/(300~305),类酪氨酸[37];
    B峰:(225~237)/(309~321)和275/310,类酪氨酸[35];
    C4:275/313,类酪氨酸[38]
    注:括号中数据为次级峰波长
    下载: 导出CSV
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  • 收稿日期:  2021-01-08
  • 网络出版日期:  2022-09-07

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