夏季汾河干流溶解无机碳同位素组成及其来源

李云霄; 黄潇; 邹英杰; 薛亮; 樊文华; 王改玲

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (9) : 3871-3878.

水污染与控制

夏季汾河干流溶解无机碳同位素组成及其来源

李云霄¹, 黄潇², 邹英杰³, 薛亮⁴, 樊文华¹, 王改玲¹

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Isotopic composition of dissolved inorganic carbon and its source in the main stream of the Fenhe River during summer

LI Yun-xiao¹, HUANG Xiao², ZOU Ying-jie³, XUE Liang⁴, FAN Wen-hua¹, WANG Gai-ling¹

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摘要

根据2019年8月对汾河干流水文参数和碳酸盐参数的调查，初步探讨了溶解无机碳（DIC）及同位素值（δ¹³C_DIC）的沿程变化及其影响因素.结果显示，源头水DIC为2756μmol/kg，δ¹³C_DIC为-9.6‰，土壤CO₂输入和碳酸岩化学风化可能是其主要来源；在太原市区上游的水库影响区，较强的初级生产使得水体DIC（平均值为2377μmol/kg）和CO₂分压（pCO₂）（平均值为552μatm）偏低，δ¹³C_DIC（平均值为-5.2‰）偏正，而在市区下游的水坝滞流影响区，城市污水的大量输入和有机物的降解使得DIC（>4900μmol/kg）和pCO₂（>5000μatm）显著升高，δ¹³C_DIC（<-10.3‰）偏负；在流经主要粮食产区的汾河下游，δ¹³C_DIC偏正（~-8.0‰）于源头，可能与C4植被（如玉米）的存在有关.可见，人为干扰已成为影响汾河DIC沿程变化的重要因素，表现为大气CO₂强源的城市下游水坝滞留区在今后需受到更多关注.

Abstract

Based on hydrographic and carbonate data collected from an investigation in the main stream of the Fenhe River in August 2019, the variations of dissolved inorganic carbon (DIC) and isotope value (δ¹³C_DIC) along the river as well as their possible factors were preliminarily discussed. The results showed that the DIC concentration was 2756μmol/kg and the δ¹³C_DIC value was -9.6‰ at the headstream, and CO₂ input from soil and carbonate chemical weathering may be the main sources. In the upstream reservoir-affected area of Taiyuan downtown, due to strong primary production both DIC (the average value was 2377μmol/kg) and partial pressure of CO₂ (pCO₂) (the average value was 552μatm) were lower, and δ¹³C_DIC (the average value was -5.2‰) was more positive compared to those at the headstream, whereas in the downstream dam stagnation affected area because of large amounts of municipal sewage inputs and degradation of organic matter both DIC (&ggt;4900μmol/kg) and pCO₂ (>5000μatm) increased substantially, and δ¹³C_DIC became more negative (<-10.3‰). In the lower reaches of the Fenhe River flowing through the main grain production areas, the δ¹³C_DIC value (~-8.0‰) was more positive than that at the headstream of the river, possibly related to the existence of C4 plants such as corn. Overall, human disturbance had become a very important factor affecting the DIC variations along the Fenhe River. Moreover, the dam stagnation affected area at the downstream of the city, which acts as a strong CO₂ source of the atmosphere, should be paid more attention in the future.

导出引用

李云霄, 黄潇, 邹英杰, 薛亮, 樊文华, 王改玲. 夏季汾河干流溶解无机碳同位素组成及其来源[J]. 中国环境科学. 2020, 40(9): 3871-3878

LI Yun-xiao, HUANG Xiao, ZOU Ying-jie, XUE Liang, FAN Wen-hua, WANG Gai-ling. Isotopic composition of dissolved inorganic carbon and its source in the main stream of the Fenhe River during summer[J]. China Environmental Science. 2020, 40(9): 3871-3878

中图分类号： X131.2 X522

参考文献

[1] Bauer J E, Cai W J, Raymond P A, et al. The changing carbon cycle of the coastal ocean[J]. Nature, 2013,504(7478):61-70.
[2] Cai W J, Guo X H, Chen C A, et al. A comparative overview of weathering intensity and HCO₃^- flux in the world's major rivers with emphasis on the Changjiang, Huanghe, Zhujiang (Pearl) and Mississippi Rivers[J]. Continental Shelf Research, 2008,28(12):1538-1549.
[3] Richey J E, Melack J M, Aufdenkampe A K, et al. Outgassing from Amazonian rivers and wetlands as a large tropical source of atmospheric CO₂[J]. Nature, 2002,416(6881):617-620.
[4] Ran L, Lu X X, Richey J E, et al. Long-term spatial and temporal variation of CO₂ partial pressure in the Yellow River, China[J]. Biogeosciences, 2015,12(4):921-932.
[5] 钱娟婷,吴起鑫,安艳玲,等.三岔河pCO₂特征及水-气界面通量分析[J]. 中国环境科学, 2017,37(6):2263-2269. Qian J T, Wu Q X, An Y L, et al. Partial pressure of CO₂ and CO₂ outgassing fluxes of Sancha River[J]. China Environmental Science, 2017,37(6):2263-2269.
[6] Aucour A M, Tao F X, Moreire P, et al. The Amazon River:behaviour of metals (Fe, Al, Mn) and dissolved organic matter in the initial mixing at the Rio Negro/Solimões confluence[J]. Chemical Geology, 2003,197(1):271-285.
[7] Clark I, Fritz P. Environmental isotopes in hydrogeology[M]. New York:Lewis Publishers, 1997:112-123.
[8] Cerling T E, Solomon D K, Quade J, et al. On the isotopic composition of carbon in soil carbon dioxide[J]. Geochimica Et Cosmochimica Acta, 1991,55(11):3403-3405.
[9] Wang X, Luo C, Ge T, et al. Controls on the sources and cycling of dissolved inorganic carbon in the Changjiang and Huanghe River estuaries, China:¹⁴C and ¹³C studies[J]. Limnology and Oceanography, 2016,61(4):1358-1374.
[10] Dubois K D, Lee D, Veizer J. Isotopic constraints on alkalinity, dissolved organic carbon, and atmospheric carbon dioxide fluxes in the Mississippi River[J]. Journal of Geophysical Research, Biogeosciences, 2010,115(G2):1-11.
[11] 郭威,李祥忠,刘卫国.西安周边河流溶解无机碳浓度及同位素组成初探[J]. 环境科学, 2013,34(4):1291-1297. Guo W, Li X Z, Liu W G. Study on the content and carbon isotopic composition of water dissolved inorganic carbon from rivers around Xi'an City[J]. Environmental Science, 2013,34(4):1291-1297.
[12] Van G R, Schulte P, Mader M, et al. Spatial and temporal variations of pCO₂, dissolved inorganic carbon and stable isotopes along a temperate karstic watercourse[J]. Hydrological Processes, 2015, 29(15):3423-3440.
[13] Wu W. Hydrochemistry of inland rivers in the north Tibetan Plateau:Constraints and weathering rate estimation[J]. Science of the Total Environment, 2016,541:468-482.
[14] Wang L, Zhang L, Cai W J, et al. Consumption of atmospheric CO₂via chemical weathering in the Yellow River basin:The Qinghai-Tibet Plateau is the main contributor to the high dissolved inorganic carbon in the Yellow River[J]. Chemical Geology, 2016,430:34-44.
[15] 山西省水利厅.山西省水资源公报[EB/OL]. http://slt.shanxi.gov.cn/zncs/szyc/szygb/. Department of Water Resources of Shanxi Province. Shanxi Provincial Water Resources Bulletin[EB/OL]. http://slt.shanxi.gov.cn/zncs/szyc/szygb/.
[16] 李英明.山西河流[M]. 北京:科学出版社, 2004:25-40. Li Y M. Shanxi River[M]. Beijing:Science Press, 2004:25-40.
[17] 郭掌珍,孟会生,张渊,等.汾河表层沉积物PCBs和OCPs含量、来源及生态风险[J]. 中国环境科学, 2013,33(4):714-721. Guo Z Z, Meng H S, Zhang Y, et al. Polychlorinated biphenyl and organochlorine pesticides in surface sediments of Fenhe River:The concentration, sources and ecological risk[J]. China Environmental Science, 2013,33(4):714-721.
[18] Pelletier G J, Lewis E, Wallace D W R. CO2SYS. XLS:A calculator for CO₂ system in seawater for Microsoft Excel/VBA[EB/OL]. Version 25. http://www.ecy.wa.gov/programs/eap/models.html.
[19] 秦勇,张东,赵志琦.沁河流域水化学组成的空间和时间变化特征[J]. 生态学杂志, 2016,35(6):1516-1524. Qin Y, Zhang D, Zhao Z Q. Spatial and temporal variations of hydrochemical compositions of river water in Qinhe Basin[J]. Chinese Journal of Ecology, 2016,35(6):1516-1524.
[20] 徐博,王启亮,吕义清.汾河流域上游段地质灾害影响因素分析[J]. 人民长江, 2017,48(S2):108-111. Xu B, Wang Q L, Lv Y Q. Analysis of influencing factors of geological hazards in the upper Fenhe River basin[J]. Yangtze River, 2017,48(S2):108-111.
[21] 韩建平.基于GIS的汾河源头森林景观格局分析[J]. 西北农林科技大学学报(自然科学版), 2012,40(11):152-158. Han J P. GIS-based landscapes patterns of forests in the source of Fenhe River watershed[J]. Journal of Northwest A&F University (Natural Science Edition), 2012,40(11):152-158.
[22] 张龙军,徐雪梅,温志超.秋季黄河pCO₂控制因素及水-气界面通量[J]. 水科学进展, 2009,20(2):227-235. Zhang L J, Xu X M, Wen Z C. Control factors of pCO₂and CO₂ degassing fluxes from the Yellow River in autumn[J]. Advances in Water Science, 2009,20(2):227-235.
[23] Deuser W G, Degens E T. Carbon isotope fractionation in the system CO₂(gas)-CO₂(aqueous)-HCO₃^-(aqueous)[J]. Nature, 1967,215(5105):1033-1035.
[24] Telmer K, Veizer J. Carbon fluxes, pCO₂ and substrate weathering in a large northern river basin, Canada:carbon isotope perspectives[J]. Chemical Geology, 1999,159:61-86.
[25] 彭希,刘丛强,王宝利,等.筑坝对喀斯特河流水体溶解性无机碳地球化学行为的影响[J]. 科学通报, 2014,59(4):366-373. Peng X, Liu C Q, Wang B L, et al. The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river[J]. Chinese Science Bulletin, 2014,59(4):366-373.
[26] Brunet F, Gaiero D, Probst J L, et al. δ¹³C tracing of dissolved inorganic carbon sources in Patagonian rivers (Argentina)[J]. Hydrological Processes, 2005,19(17):3321-3344.
[27] 冯佳,郭宇宁,王飞,等.太原汾河景区浮游植物群落结构及其与环境因子关系分析[J]. 环境科学, 2016,37(4):1353-1361. Feng J, Guo Y N, Wang F, et al. Relationship between the phytoplankton distribution and environmental factors in Fenhe scenic spot of Taiyuan[J]. Environmental Science, 2016,37(4):366-373.
[28] Wachniew P. Isotopic composition of dissolved inorganic carbon in a large polluted river:The Vistula, Poland[J]. Chemical Geology, 2006, 233(3):293-308.
[29] Alshboul Z, Eecinas J, Hofmann H, et al. Export of dissolved methane and carbon dioxide with effluents from municipal wastewater treatment plants[J]. Environmental Science and Technology, 2016, 50(11):5555-5563.
[30] Liu X Y, Yang X F, Li Y X, et al. Variations in dissolved inorganic carbon species in effluents from large-scale municipal wastewater treatment plants (Qingdao, China) and their potential impacts on coastal acidification[J]. Environmental Science and Pollution Research, 2019,26:15019-15027.
[31] Zhang D, Liu X, Liu C, et al. Responses of runoff to climatic variation and human activities in the Fenhe River, China[J]. Stochastic Environmental Research and Risk Assessment, 2013,27(6):1293-1301.
[32] 张海永.汾河流域生态地质环境演化分析[J]. 华北国土资源, 2015, (2):120-122. Zhang H Y. Analysis on the evolution of ecological geological environment in Fenhe River basin[J]. Huabei Land and Resources, 2015,(2):120-122.
[33] 山西省统计局.山西统计年鉴2018[EB/OL]. http://tjj.shanxi.gov.cn/tjsj/tjnj/nj2018/indexch.htm. Statistics Bureau of Shanxi Province. Shanxi statistical yearbook 2018[EB/OL]. http://tjj.shanxi.gov.cn/tjsj/tjnj/nj2018/indexch.htm.
[34] Hélie J, Hillaire-Marcel C and Rondeau B. Seasonal changes in the sources and fluxes of dissolved inorganic carbon through the St. Lawrence River-isotopic and chemical constraint[J]. Chemical Geology, 2002,186(1):117-138.
[35] Karim A, Veizer J. Weathering processes in the Indus River Basin:Implications from riverine carbon, sulfur, oxygen, and strontium isotopes[J]. Chemical Geology, 2000,170(1):153-177.
[36] Zhang T, Li J, Pu J, et al. Carbon dioxide exchanges and their controlling factors in Guijiang River, SW China[J]. Journal of Hydrology, 2019,578:124073.
[37] Lauerwald R, Laruelle G G, Hartmann J, et al. Spatial patterns in CO₂evasion from the global river network[J]. Global Biogeochemical Cycles, 2015,29(5):534-554.
[38] Weiss R F. Carbon dioxide in water and seawater:the solubility of a non-ideal gas[J]. Marine Chemistry, 1974,2(3):203-215.
[39] US NOAA/ESRL. Trends in atmospheric carbon dioxide[EB/OL]. http://www.esrl.noaa.gov/gmd/ccgg/trends/.
[40] 祁第,翟惟东,陈能汪,等.九龙江的碳酸盐体系、CO₂分压及其调控[J]. 地球与环境, 2014,42(3):286-296. Qi D, Zhai W D, Chen N W, et al. Carbonate system and partial pressure of CO₂ in the subtropical Jiulongjiang River, China:a discussion on controlling mechanisms[J]. Earth and Environment, 2014,42(3):286-296.