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| Releasing Characteristics of Sediment Dissolved Organic Nitrogen (DON) from Erhai Lake and its environmental impact mechanism |
| SHI Ling-long1,2,3,4, ZHANG Li2,3,4, WANG Sheng-rui2,3,4, DUAN Chang-qun1, LI Wen-zhang2,3, XI Yin2,3, LI Qiu-cai2,3, Xu Ke-chen2,3 |
1. College of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China;
2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
3. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
4. Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Yunnan Kunming 650504, China |
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Abstract The release characteristics of DON in the surface sediments of Erhai Lake were studied by simulation experiment combined with UV-Vis absorbance and fluorescence spectroscopy.Moreover,the environmental influence factors and environment implication of sediment DON were also discussed.The obtained results indicated that:(1) The release kinetics of DON in the surface sediment could be well simulated by first-order kinetics equation.The maximal DON release amount from each area followed the pattern:northern > southern > middle,ranging from 24.387 to 46.949mg/kg.Moreover,the first (maximum within 10min) and the largest releasing components were the protein-like component P(I+Ⅱ,n) and humic-like component P(Ⅲ+V,n)(accounting for approximately 76%) respectively.(2) The DON release amount in sediments of Erhai Lake is relatively small under the overlying water conditions of aerobic (DO=8~10mg/L) and moderate pH (pH=8),and the obvious increase/decrease of pH/DO was considered to promote its releasing amount.(3) The compositional parameters of DON in Erhai sediments was positively correlated with its releasing amount (r=0.813~0.919,P<0.01).The more the substituent DON was contained in the sediment,the greater the molecular weight and aromaticity degree were,and the greater its release amount was.Moreover,the content ratio of protein-like to humic-like substances P(I+Ⅱ,n)/P(Ⅲ+V,n) can also be taken as the indirect indicator of the release amount of sediment DON.The compositional characteristic of sediment DON can reflect its releasing characteristics,that is,the DON release risk of from Erhai sediments can be reflected to some extent.
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Received: 08 December 2016
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| [1] |
Murphy D V, Macdonald A J, Stockdale E A, et al. Soluble organic nitrogen in agricultural soils[J]. Biology and Fertility of Soils, 2000,30(5):374-387.
|
| [2] |
罗专溪,魏群山,王振红,等.淡水水体溶解有机氮对有毒藻种的生物有效性[J]. 生态环境学报, 2010,19(1):45-50.
|
| [3] |
Jen B L, Jensen A, Hansen J W, et al. Budgets of sediment nitrogen and carbon cycling in the shallow water of Knebel Vig, Denmark[J]. Aquatic Microbial Ecology, 1998,14(1):69-80.
|
| [4] |
汪淼,严红,焦立新,等.滇池沉积物氮内源负荷特征及影响因素[J]. 中国环境科学, 2015,35(1):218-226.
|
| [5] |
Jin X, Wang S, Pang Y, et al. Phosphorus fractions and the effect of pH on the phosphorus release of the sediments from different trophic areas in Taihu Lake, China[J]. Environmental Pollution, 2006,139(2):288-295.
|
| [6] |
Wang S, Jiao L, Jin X, et al. Inorganic nitrogen release kinetics and exchangeable inorganic nitrogen of the sediments from shallow lakes in the middle and lower reaches of the Yangtze River region[J]. Water and Environment Journal, 2014,28(1):38-44.
|
| [7] |
吴志强.江湖关系变化对鄱阳湖沉积物氮磷形态及释放风险的影响[D]. 南昌:南昌大学, 2014.
|
| [8] |
李文章,张莉,王圣瑞,等.洱海上覆水溶解性有机氮特征及其与湖泊水质关系[J]. 中国环境科学, 2016,36(6):1867-1876.
|
| [9] |
Watanabe A, Tsutsuki K, Inoue Y, et al. Composition of dissolved organic nitrogen in rivers associated with wetlands[J]. Science of the Total Environment, 2014,493:220-228.
|
| [10] |
Li Z, Shengrui W, Haichao Z, et al. Using multiple combined analytical techniques to characterize water extractable organic nitrogen from Lake Erhai sediment[J]. Science of the Total Environment, 2016,542(Pt A):344-353.
|
| [11] |
Maie N, Scully N M, Pisani O, et al. Composition of a protein-like fluorophore of dissolved organic matter in coastal wetland and estuarine ecosystems[J]. Water Research, 2007,41(3):563-570.
|
| [12] |
Li Y, Wang S, Zhang L, et al. Composition and spectroscopic characteristics of dissolved organic matter extracted from the sediment of Erhai Lake in China[J]. Journal of Soils and Sediments, 2014,14(9):1599-1611.
|
| [13] |
倪兆奎,王圣瑞,金相灿,等.云贵高原典型湖泊富营养化演变过程及特征研究[J]. 环境科学学报, 2011,31(12):2681-2689.
|
| [14] |
Zhang L, Wang S, Wu Z. Coupling effect of pH and dissolved oxygen in water column on nitrogen release at water-sediment interface of Erhai Lake, China[J]. Estuarine Coastal & Shelf Science, 2014,149:178-186.
|
| [15] |
Chen J, Lu S, Zhao Y, et al. Effects of overlying water aeration on phosphorus fractions and alkaline phosphatase activity in surface sediment[J]. Journal of Environmental Sciences, 2011,23(2):206-211.
|
| [16] |
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[D]. 杭州:浙江大学, 2007.
|
| [17] |
He X S, Xi B D, Wei Z M, et al. Fluorescence excitation -emission matrix spectroscopy with regional integration analysis for characterizing composition and transformation of dissolved organic matter in landfill leachates.[J]. Journal of Hazardous Materials, 2011,190(1-3):293-299.
|
| [18] |
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):5701-10.C.
|
| [19] |
He X S, Xi B D, Wei Z M, et al. Fluorescence excitation -emission matrix spectroscopy with regional integration analysis for characterizing composition and transformation of dissolved organic matter in landfill leachates[J]. Journal of Hazardous Materials, 2011,190(1-3):293-9.
|
| [20] |
Sedlak D L. Wastewater-Derived Dissolved Organic Nitrogen:Analytical Methods, Characterization, and Effects-A Review[J]. Critical Reviews in Environmental Science and Technology, 2006,36(3):261-285.
|
| [21] |
赵亚丽,焦立新,王圣瑞,等.洱海表层沉积物溶解性有机氮生物有效性[J]. 环境科学研究, 2013,26(3):262-268.
|
| [22] |
Li Y, Wang S, Zhang L. Composition, source characteristic and indication of eutrophication of dissolved organic matter in the sediments of Erhai Lake[J]. Environmental Earth Sciences, 2015, 74(5):3739-3751.
|
| [23] |
Xiao-Zhen H U, Jin X C, Bao-Han D U, et al. Submerged Macrophyte of Lake Erhai and Its Dynamic Change[J]. Research of Environmental Sciences, 2005,18(1):1-4.
|
| [24] |
张莉,王圣瑞,赵海超,等.洱海沉积物酶活性的时空分布特征及其对富营养化指示意义[C]. 深圳:中国环境科学学会学术年会, 2015.
|
| [25] |
Shuang F, Li Z, Wang S, et al. Characterization of dissolved organic nitrogen in wet deposition from Lake Erhai basin by using ultrahigh resolution FT-ICR mass spectrometry[J]. Chemosphere, 2016, 156:438-445.
|
| [26] |
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(3/4):312-318.
|
| [27] |
古励,郭显强,丁昌龙,等.藻源型溶解性有机氮的产生及不同时期藻类有机物的特性[J]. 中国环境科学, 2015,35(9):2745-2753.
|
| [28] |
高洁,江韬,李璐璐,等.三峡库区消落带土壤中溶解性有机质(DOM)吸收及荧光光谱特征[J]. 环境科学, 2015,36(1):151-162.
|
| [29] |
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.
|
| [30] |
Huguet A, Vacher L, Relexans S, et al. Properties of fluorescent dissolved organic matter in the Gironde Estuary[J]. Organic Geochemistry, 2009,40(6):706-719.
|
| [31] |
Ahmad S R, Reynolds D M. Monitoring of water quality using fluorescence technique:prospect of on-line process control[J]. Water Research, 1999,33(9):2069-2074.
|
| [32] |
Mounier S, Braucher R, Bena M J Y. Differentiation of organic ? matter's properties of the Rio Negro basin by cross-flow ultrafiltration and UV-spectrofluorescence[J]. Water Research, 1999, 33(10):2363-2373.
|
| [33] |
Coble P G. Characterization of marine and terrestrial DOM in seawater using excitation-emission matrix spectroscopy[J]. Marine Chemistry, 1996,51(4):325-346.
|
| [34] |
Artinger R, Buckau G, Geyer S, et al. Characterization of groundwater humic substances:influence of sedimentary organic carbon[J]. Applied Geochemistry, 2000,15(1):97-116.
|
| [35] |
叶琳琳,潘成荣,张之源,等.瓦埠湖沉积物氮的赋存特征以及环境因子对NH4+-N释放的影响[J]. 农业环境科学学报, 2006, 25(5):1333-1336.
|
| [36] |
Coleman D C. The microbial loop concept as used in terrestrial soil ecology studies[J]. Microbial Ecology, 1994,28(2):245-250.
|
|
|
|
