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洱海沉积物不同分子量溶解性有机氮空间分布及光谱特征

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程杰, 张莉, 王圣瑞, 曹长春. 洱海沉积物不同分子量溶解性有机氮空间分布及光谱特征[J]. 环境化学, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
引用本文: 程杰, 张莉, 王圣瑞, 曹长春. 洱海沉积物不同分子量溶解性有机氮空间分布及光谱特征[J]. 环境化学, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
shu
CHENG Jie, ZHANG Li, WANG Shengrui, CAO Changchun. Spatial distribution and spectral characteristics of dissolved organic nitrogen with different molecular weight in Erhai sediment[J]. Environmental Chemistry, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
Citation: CHENG Jie, ZHANG Li, WANG Shengrui, CAO Changchun. Spatial distribution and spectral characteristics of dissolved organic nitrogen with different molecular weight in Erhai sediment[J]. Environmental Chemistry, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
shu

洱海沉积物不同分子量溶解性有机氮空间分布及光谱特征

  • 1.

    桂林理工大学环境科学与工程学院, 桂林, 541004;

  • 2.

    中国环境科学研究院环境基准与风险评估国家重点实验室/湖泊生态环境创新基地/国家环境保护湖泊污染控制重点实验室, 北京, 100012

  • 基金项目:

    国家自然科学基金(U1202235,41103070)

    国家水专项"十二五"课题"洱海湖泊生境改善关键技术与工程示范"(2012ZX07105-004)资助.

Spatial distribution and spectral characteristics of dissolved organic nitrogen with different molecular weight in Erhai sediment

  • 1.

    College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China;

  • 2.

    State Key Laboratory of Environmental Criteria and Risk Assessment, Research Center of Lake Eco-environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China

  • Fund Project:

  • 摘要: 利用超滤技术对洱海沉积物溶解性有机氮(DON)进行分子量分级,探究了DON各组分空间分布特征,并运用紫外-可见吸收光谱和三维荧光光谱对其结构进行了表征.结果表明,洱海沉积物总DON含量ω(DON)为23.46-61.40 mg·kg-1,平均值为37.19 mg·kg-1,空间分布总体呈现南部>北部>中部的趋势;分子量大于1K Da的大分子组分ω(>1KDa)占ω(DON)的比例为79.1%-93.0%,即洱海沉积物DON是以大分子为主.沉积物DON各组分的芳香性及腐殖化程度较高,芳香环取代基中活性官能团种类较多,且南部芳香性及腐殖化程度最高,北部芳香环取代基种类最多;大分子组分DON含有类富里酸荧光物质,其来源于陆源输入和微生物降解共同作用.由此可见,洱海沉积物DON主要由大分子物质组成,其腐殖化程度较高且含类富里酸荧光物质,而此类DON对藻类的生物有效性较低,这可能是洱海沉积物氮含量较高而上覆水氮浓度较低的原因之一,即沉积物DON分子组成及其结构特征可在一定程度上作为湖泊营养水平的衡量指标.
    Abstract: To study the spatial distribution of different dissolved organic nitrogen (DON) fractions in Erhai sediment, ultrafiltration technique was used to fractionate DON samples based on molecular weight. The structures of each fraction were characterized by UV-visible absorption and three-dimensional fluorescence spectra. The results showed that the total DON content ω(DON) was 23.46-61.40 mg·kg-1, with the mean value of 37.19 mg·kg-1. The overall trend of its spatial distribution from high to low was south, north and central section, respectively. The proportion of high molecular weight larger than 1K Da was 79.1%-93.0%, indicating that DON in Erhai sediment was mainly composed of fractions with high molecular weight. The aromaticity and humification degree of DON fractions were relatively high, and there were also many types of reactive functional groups in substituent aromatic rings. In addition, the highest aromaticity and humification degree appeared in the south, while the maximum types of reactive functional groups were observed in the north. The fraction of high molecular weight DON contained fulvic acid-like materials, which derived from the interaction of terrestrial input and microbial degradation. In short, DON in Erhai sediment was mainly composed of high molecular weight fractions, its humification degree was high and contained fulvic acid-like materials. But the bioavailability of such DON to algae was low. This was probably one of the reasons that the nitrogen content was high in the sediment but relatively low in the overlying water in Erhai lake.Our work suggests that the molecular composition and their structure characteristics could be utilized to measure the lake trophic level to a certain extent.
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  • [1] Kemp A L W, Mudrochova A. Distribution and forms of nitrogen in a Lake Ontario sediment core[J]. Limnol Oceanogr, 1972, 17(6): 855-867
    [2] Stepanauskas R, Leonardson L, Tranvik L J. Bioavailability of wetland-derived DON to freshwater and marine bacterioplankton[J]. Limnology and Oceanography, 1999, 44(6): 1477-1485
    [3] Mitamura O, Matsumoto K. Uptake rate of urea nitrogen and decomposition rate of urea carbon at the surface microlayer in Lake Biwa[J]. Proceedings-International Association of Theoretical and Applied Limnology, 1981, 21:556-564
    [4] Berman T, Bronk D A. Dissolved organic nitrogen: A dynamic participant in aquatic ecosystems[J]. Aquatic Microbial Ecology, 2003, 31(3): 279-305
    [5] 李伟, 徐斌, 夏圣骥, 等. 饮用水中溶解性有机氮类化合物的控制研究进展[J]. 中国给水排水, 2009, 25(8): 22-26
    [6] Zehr J P, Paulsen S G, Axler R P, et al. Dynamics of dissolved organic nitrogen in subalpine Castle Lake, California[J]. Hydrobiologia, 1988, 157(1): 33-45
    [7] 张振克, 吴瑞金. 云南洱海流域人类活动的湖泊沉积记录分析[J]. 地理学报, 2000, 55(1): 66-74
    [8] 郑国强, 于兴修, 江南, 等. 洱海水质的演变过程及趋势[J]. 东北林业大学学报, 2004, 32(1): 99-102
    [9] 高悦文. 湖泊沉积物溶解性有机氮特征研究. 呼和浩特: 内蒙古农业大学硕士学位论文, 2012
    [10] 冯伟莹,张生,焦立新,等. 湖泊沉积物溶解性有机氮组分的藻类可利用性[J]. 环境科学, 2013, 34(6): 2176-2183
    [11] Ged E C, Boyer T H. Molecular weight distribution of phosphorus fraction of aquatic dissolved organic matter[J]. Chemosphere, 2013, 91(7): 921-927
    [12] 中国科学院南京土壤研究所.土壤理化分析[M].上海:上海科技出版社,1978
    [13] Ruban V, López-Sánchez J F, Pardo P, et al. Harmonized protocol and certified reference material for the determination of extractable contents of phosphorus in freshwater sediments-A synthesis of recent works[J]. Fresenius' journal of analytical chemistry, 2001, 370(2/3): 224-228
    [14] 马嵩. 钱塘江沉积物生源氮素和有毒物质多氯联苯污染特征. 杭州: 浙江大学硕士学位论文, 2007
    [15] 国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002
    [16] 吕晓霞, 翟世奎, 牛丽凤. 长江口柱状沉积物中有机质C/N的研究[J]. 环境化学, 2005, 24(3): 255-259
    [17] 魏中青, 刘丛强, 梁小兵, 等. 洱海沉积物中有机质和 DNA 的分布特征[J]. 沉积学报, 2005, 22(4): 672-675
    [18] Chen C R, Xu Z H, Zhang S L, et al. Soluble organic nitrogen pools in forest soils of subtropical Australia[J]. Plant and soil, 2005, 277(1/2): 285-297
    [19] Filep T, Rékási M. Factors controlling dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and DOC/DON ratio in arable soils based on a dataset from Hungary[J]. Geoderma, 2011, 162(3): 312-318
    [20] Weishaar J L, Aiken G R, Bergamaschi B A, et al. Evaluation of specific ultraviolet absorbance as an indicator of the chemical composition and reactivity of dissolved organic carbon[J]. Environmental Science & Technology, 2003, 37(20): 4702-4708
    [21] Korshin G V, Benjamin M M, Sletten R S. Adsorption of natural organic matter (NOM) on iron oxide: Effects on NOM composition and formation of organo-halide compounds during chlorination[J]. Water Research, 1997, 31(7): 1643-1650
    [22] Dorado J, González-Vila F J, Zancada M C, et al. Pyrolytic descriptors responsive to changes in humic acid characteristics after long-term sustainable management of dryland farming systems in Central Spain[J]. Journal of analytical and applied pyrolysis, 2003, 68: 299-314
    [23] 吴丰昌.天然有机质及其与污染物的相互作用[M].北京:科学出版社,2010
    [24] Chen W, Westerhoff P, Leenheer J A, et al. Fluorescence excitation-emission matrix regional integration to quantify spectra for dissolved organic matter[J]. Environmental science & technology, 2003, 37(24): 5701-5710
    [25] McKnight D M, Boyer E W, Westerhoff P K, et al. Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic material and aromaticity[J]. Limnology and Oceanography, 2001, 46(1): 38-48
    [26] 金相灿等.湖泊富营养化调查规范(第二版)[M].北京:中国环境科学出版社,1990
    [27] Berman T. Dissolved organic nitrogen utilization by an Aphanizomenon bloom in Lake Kinneret[J]. Journal of Plankton Research, 1997, 19(5): 577-586
    [28] Berman T, Chava S. Algal growth on organic compounds as nitrogen sources[J]. Journal of Plankton Research, 1999, 21(8): 1423-1437
    [29] Pehlivanoglu E, Sedlak D L. Bioavailability of wastewater-derived organic nitrogen to the alga Selenastrum Capricornutum[J]. Water Research, 2004, 38(14): 3189-3196
    [30] Berman T, Bronk D A. Dissolved organic nitrogen: A dynamic participant in aquatic ecosystems[J]. Aquatic Microbial Ecology, 2003, 31(3): 279-305
    [31] 朱蓉, 徐斌, 林琳,等.微污染黄浦江水溶解性有机氮的分子组成特性分析[J].中国给水排水, 2013,29(1):1-5
    [32] Seitzinger S P, Sanders R W, Styles R. Bioavailability of DON from natural and anthropogenic sources to estuarine plankton[J]. Limnology and Oceanography, 2002, 47(2): 353-366
    [33] Wiegner T N, Seitzinger S P. Photochemical and microbial degradation of external dissolved organic matter inputs to rivers[J]. Aquatic Microbial Ecology, 2001, 24(1): 27-40
    [34] 陈小峰,揣小明,刘涛,等.江苏省西部湖泊溶解性有机物光谱学特征和来源解析[J].湖泊科学,2012,24(2):259-266
    [35] 谢理,杨浩,渠晓霞,等.滇池典型陆生和水生植物溶解性有机质组分的光谱分析[J].环境科学研究,2013,26(1):72-79
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  • 收稿日期:  2014-05-09
  • 刊出日期:  2014-11-15
程杰, 张莉, 王圣瑞, 曹长春. 洱海沉积物不同分子量溶解性有机氮空间分布及光谱特征[J]. 环境化学, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
引用本文: 程杰, 张莉, 王圣瑞, 曹长春. 洱海沉积物不同分子量溶解性有机氮空间分布及光谱特征[J]. 环境化学, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
shu
CHENG Jie, ZHANG Li, WANG Shengrui, CAO Changchun. Spatial distribution and spectral characteristics of dissolved organic nitrogen with different molecular weight in Erhai sediment[J]. Environmental Chemistry, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
Citation: CHENG Jie, ZHANG Li, WANG Shengrui, CAO Changchun. Spatial distribution and spectral characteristics of dissolved organic nitrogen with different molecular weight in Erhai sediment[J]. Environmental Chemistry, 2014, 33(11): 1848-1856. doi: 10.7524/j.issn.0254-6108.2014.11.022
shu

洱海沉积物不同分子量溶解性有机氮空间分布及光谱特征

  • 1.  桂林理工大学环境科学与工程学院, 桂林, 541004;
  • 2.  中国环境科学研究院环境基准与风险评估国家重点实验室/湖泊生态环境创新基地/国家环境保护湖泊污染控制重点实验室, 北京, 100012
  • 收稿日期:  2014-05-09
基金项目:

国家自然科学基金(U1202235,41103070)

国家水专项"十二五"课题"洱海湖泊生境改善关键技术与工程示范"(2012ZX07105-004)资助.

摘要: 利用超滤技术对洱海沉积物溶解性有机氮(DON)进行分子量分级,探究了DON各组分空间分布特征,并运用紫外-可见吸收光谱和三维荧光光谱对其结构进行了表征.结果表明,洱海沉积物总DON含量ω(DON)为23.46-61.40 mg·kg-1,平均值为37.19 mg·kg-1,空间分布总体呈现南部>北部>中部的趋势;分子量大于1K Da的大分子组分ω(>1KDa)占ω(DON)的比例为79.1%-93.0%,即洱海沉积物DON是以大分子为主.沉积物DON各组分的芳香性及腐殖化程度较高,芳香环取代基中活性官能团种类较多,且南部芳香性及腐殖化程度最高,北部芳香环取代基种类最多;大分子组分DON含有类富里酸荧光物质,其来源于陆源输入和微生物降解共同作用.由此可见,洱海沉积物DON主要由大分子物质组成,其腐殖化程度较高且含类富里酸荧光物质,而此类DON对藻类的生物有效性较低,这可能是洱海沉积物氮含量较高而上覆水氮浓度较低的原因之一,即沉积物DON分子组成及其结构特征可在一定程度上作为湖泊营养水平的衡量指标.

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