Quantitative analysis of dissolved inorganic carbon sources in water bodies in the Lujiang river basin
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摘要:
溶解无机碳（DIC）是研究流域水体碳循环的重要指标之一。泸江流域内岩溶断陷盆地发育，水文地质条件独特，是研究流域水体碳迁移转化的良好选区。为了研究泸江流域河流水体水化学类型及DIC的来源问题，分析了该流域雨季14个地表水点、8个暗河点、10个泉点的水化学和碳同位素采样数据。结果表明：（1）流域内水化学类型主要是HCO3-Ca型，属于“碳酸盐岩风化型”；（2）通过分析离子关系图进一步确定了${\rm{SO}}_4^{2-}$与${\rm{NO}}_3^{-}$ 参与了流域岩石风化过程；（3）基于离子比值法计算得出，碳酸风化碳酸盐岩贡献比例平均为68.8%，硫酸/硝酸风化碳酸盐岩贡献比例平均为27.2%，硅酸盐岩风化对${\rm{HCO}}_3^{-}$贡献比例平均为3.9%，泸江流域水体岩石风化过程中，以碳酸风化碳酸盐岩为主；（4）根据碳同位素法验证，与实测值相比，暗河水和泉水理论平均值δ13CDIC_Th比较接近，而地表水则过于偏正，说明地表水中DIC来源不仅由岩石风化控制，还有河流水体内部的生物地球化学过程。相比较而言，地表河流处城镇化严重且存在明显农业活动，受人类活动影响显著。
Abstract:The watershed carbon cycle is an important part of the global carbon cycle, playing an important role in seeking global carbon sinks that have been missed. Dissolved inorganic carbon (DIC) is one of the important indicators for studying the carbon cycle of water bodies in the basin. As an important component of terrestrial ecosystems, karst water bodies containing high DIC concentrations play an important role in the global carbon cycle. The Lujiang river basin, a typical development area of karst graben basin, is an applicable place for us to study the carbon migration and transformation of water bodies. In order to study the hydrochemical types and sources of DIC in the rivers of the Lujiang river basin, sampling data of hydrochemistry and carbon isotope from 14 surface water points, 8 underground river points, and 10 spring points during the rainy season were analyzed. It is believed that exploring the proportional contribution of DIC sources in different water bodies may help to understand the sources and cycles of groundwater DIC under the influence of human activities, providing scientific references for water resource management.
Firstly, this study determines the hydrochemical types of different water bodies through the Piper trilinear map and Schukalev classification. The results show that regardless of the type of water body in the study area, the hydrochemical type in the drainage basin is mainly HCO3-Ca, belonging to the "type of carbonate rock weathering". Due to the long interaction time between water and rock, the rock weathering in groundwater is more obvious than in surface water. Secondly, the analyses of ion sources in water bodies by Gibbs plot indicate the consistency in the hydrochemical composition, changes, and origin mechanisms between groundwater and surface water. The controlled mechanism belongs to the "leaching type of rock weathering". Thirdly, due to the widespread distribution of carbonate rocks in the study area, an analysis has been conducted on carbonate rock dissolution in order to distinguish the relative contribution of limestone and dolomite dissolution to the chemical ion compositions of water bodies in the watershed. It is found that there are additional sources of Mg2+ and Ca2+ in the surface water of the Lujiang river basin, while other acids participate in the chemical weathering reaction in the water bodies of the underground river points and spring points. Furthermore, it is determined that ${\rm{SO}}_4^{2-}$ and ${\rm{NO}}_3^{-}$ are involved in the rock weathering in the basin, which has caused a large disturbance to the hydrochemical characteristics of water bodies in the basin. The Lujiang river basin is mixed with carbonate and silicate rocks. Therefore, the main sources of ${\rm{HCO}}_3^{-}$ in water are classified into three types: carbonate rocks weathered and dissolved by carbonic acid, carbonate rocks weathered by sulfuric acid/nitric acid, and silicate rocks weathered by carbonic acid. Based on the quantitative analysis by ion ratio method, carbonate rocks weathered by carbonic acid contribute average 68.8% to HCO$_3^{−}$, carbonate rocks weathered by sulfuric acid/nitric acid 27.2%, and silicate rock weathered by carbonic acid 3.9%. During the weathering process of water bodies in the Lujiang river basin, carbonate rocks are mainly weathered by carbonic acid. Finally, the verification by carbon isotope method has been compared with the measured values to show that the theoretical average values of underground river water and spring water δ13CDIC_Th are relatively close, while the values of surface water are positive too, indicating that the source of DIC in surface water is not only controlled by rock weathering, but also by biogeochemical processes within river water bodies. In comparison, the areas of surface rivers are more significantly affected by human activities with severe urbanization and agricultural activities.
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表 1 不同类型水体各指标
Table 1. Indicators of different types of water bodies
类型 参数 指标 K+ Na+ Ca2+ Mg2+ HCO $_3^{-} $ Cl− NO $_3^{-} $ SO $_4^{2-} $ SiO $_3^{2-} $ pH TDS EC 暗河水 最小值 0.4 0.3 57.3 11.7 248.0 0.8 6.6 3.1 8.1 7.5 231.0 407.5 最大值 2.9 10.6 98.7 25.3 374.0 9.3 21.2 70.7 70.6 8.0 720.0 651.0 均值 1.5 2.4 79.3 17.1 300.1 3.1 12.7 19.1 21.9 7.7 364.6 551.3 标准差 0.9 3.4 16.7 4.6 45.7 2.7 5.1 23.9 20.1 0.2 154.3 96.8 变异系数 0.6 1.4 0.2 0.3 0.2 0.9 0.4 1.3 0.9 0.0 0.4 0.2 地表水 最小值 0.8 1.2 2.2 1.1 21.0 0.8 0.3 5.4 7.1 1.8 58.7 88.7 最大值 17.4 17.9 71.5 30.4 275.0 34.6 20.5 114.0 47.1 8.2 513.0 564.0 均值 8.3 10.0 41.3 14.6 162.5 15.9 5.8 33.6 18.4 7.4 277.0 319.1 标准差 6.1 5.6 23.1 8.9 76.4 13.9 6.0 30.8 10.6 1.6 136.8 152.9 变异系数 0.7 0.6 0.6 0.6 0.5 0.9 1.1 0.9 0.6 0.2 0.5 0.5 泉水 最小值 0.3 0.5 71.4 7.0 323.0 0.4 0.7 3.7 9.5 7.1 213.0 366.9 最大值 2.1 11.4 136.0 42.7 485.0 18.0 28.7 51.7 18.3 7.8 709.0 787.0 均值 1.1 2.4 100.4 25.2 410.9 3.4 10.1 13.0 13.3 7.5 412.8 538.7 标准差 0.6 3.2 21.6 14.2 41.0 5.3 8.4 14.6 2.9 0.2 123.0 162.7 变异系数 0.6 1.4 0.2 0.6 0.1 1.6 0.8 1.1 0.2 0.0 0.3 0.3 注：pH为无量纲，电导率（EC）为μs·cm−1，其他指标为mg·L−1，变异系数为%。
Note: pH is dimensionless; electrical conductivity (EC) is μs·cm−1; other indexes are mg·L−1; variable coefficient is %.
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[1] 刘再华, Dreybrodt W, 王海静. 一种由全球水循环产生的可能重要的CO2汇[J]. 科学通报, 2007, 52(20):2418-2422.
[2] Bai X, Chetelat B, Song Y L. Sources of dissolved inorganic carbon in rivers from the Changbaishan area, an active volcanic zone in North Eastern China[J]. Acta Geochimica, 2017, 36(3): 410-415. doi: 10.1007/s11631-017-0178-y
[3] Robert G, Peter S, Michael M, Alfons B, Johannes A C B. 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. doi: 10.1002/hyp.10457
[4] Mcmahon P B, Chapelle F H. Geochemistry of dissolved inorganic carbon in a coastal plain aquifer. 2. Modeling carbon sources, sinks, and δ13C evolution[J]. Journal of Hydrology, 1991, 127(1-4): 109-135. doi: 10.1016/0022-1694(91)90111-T
[5] Wang X C, Luo C L, Ge T T, Xu C L, Xue Y J . 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. doi: 10.1002/lno.10301
[6] Battin T J, Luyssaert S, Kaplan L A, Aufdenkampe A K, Richter A, Tranvik L J. The boundless carbon cycle[J]. Nature Geoscience, 2009, 2(9): 598-600. doi: 10.1038/ngeo618
[7] Cole J J, Prairie Y T, Caraco N F, McDowell W H, Tranvik L J, Striegl R G, Duarte C M, Kortelainen P, Downing J A, Middelburg J J, Melack J. Plumbing the global carbon cycle: Integrating inland waters into the terrestrial carbon budget[J]. Ecosystems, 2007, 10(1): 171-184.
[8] 袁道先. 中国岩溶动力系统[M]. 北京: 地质出版社, 2002.
YUAN Daoxian. Karst Dynamic systems of China[M]. Beijing: Geology Press, Beijing, 2002.
[9] 李晶莹, 张经. 流域盆地的风化作用与全球气候变化[J]. 地球科学进展, 2002, 17(3):411-419.
LI Jingying, ZHANG Jing. Weathering of drainage basins and global climate change[J]. Progress in Earth Science, 2002, 17(3): 411-419.
[10] 张连凯, 覃小群, 杨慧, 黄奇波, 刘朋雨. 珠江流域河流碳输出通量及变化特征[J]. 环境科学, 2013, 34(8):3025-3034. doi: 10.13227/j.hjkx.2013.08.043
ZHANG Liankai, QIN Xiaoqun, YANG Hui, HUANG Qibo, LIU Pengyu. Transported fluxes of the riverine carbon and seasonal variation in Pearl river basin[J]. Environmental Science, 2013, 34(8): 3025-3034. doi: 10.13227/j.hjkx.2013.08.043
[11] Gao Q, Wang Z. Dissolved inorganic carbon in the Xijiang river: Concentration and stable isotopic composition[J]. Environmental Earth Sciences, 2015, 73(1): 253-266. doi: 10.1007/s12665-014-3420-5
[12] Porowska Dorota. Determination of the origin of dissolved inorganic carbon in groundwater around a reclaimed landfill in Otwock using stable carbon isotopes[J]. Waste Management, 2015, 39(5): 216-225.
[13] Jiang Y J. The contribution of human activities to dissolved inorganic carbon fluxes in a karst underground river system: Evidence from major elements and δ13CDIC in Nandong, Southwest China[J]. Journal of Contaminant Hydrology, 2013, 152(9): 1-11.
[14] 任坤, 潘晓东, 曾洁, 焦友军, 彭聪, 梁嘉鹏. 岩溶区不同土地利用下地下水碳同位素地球化学特征及生态意义[J]. 环境科学, 2019, 40(10):4523-4531. doi: 10.13227/j.hjkx.201904100
REN Kun, PAN Xiaodong, ZENG Jie, JIAO Youjun, PENG Cong, LIANG Jiapeng. Geochemical characteristics and ecological significance of carbon isotopes in groundwater under the influence of different land use types in karst areas[J]. Environmental Science, 2019, 40(10): 4523-4531. doi: 10.13227/j.hjkx.201904100
[15] Brown K A, Mclaughlin F, Tortell P D, Yamamoto-Kawai M, Francois R. Sources of dissolved inorganic carbon to the Canada Basin halocline: A multitracer study[J]. Journal of Geophysical Research Oceans, 2016, 121(5): 2918-2936. doi: 10.1002/2015JC011535
[16] Godfrey Linda V, Herrera Christian, Burr George S, Houston John, Aguirre Igor, Jordan Teresa E. 14C and 13C activity of groundwater DOC and DIC in the volcanically active and arid Loa basin of Northern Chile[J]. Journal of Hydrology, 2021, 595(1): 125987.
[17] 徐森, 李思亮, 钟君. 西南喀斯特流域土地利用对河流溶解无机碳及其同位素的影响[J]. 环境科学, 2022, 43(2):752-761. doi: 10.13227/j.hjkx.202106198
XU Sen, LI Siliang, ZHONG Jun. Effects of land use on dissolved inorganic carbon and its isotopes in rivers in the southwest karst basin[J]. Environmental Science, 2022, 43(2): 752-761. doi: 10.13227/j.hjkx.202106198
[18] Xuan Y X, Cao Y J, Tang C Y, Li M. Changes in dissolved inorganic carbon in river water due to urbanization revealed by hydrochemistry and carbon isotope in the Pearl River Delta, China[J]. Environmental Science and Pollution Research International, 2020, 27(19): 24542-24557. doi: 10.1007/s11356-020-08454-4
[19] 王波, 王宇, 张贵, 张华, 代旭升, 康晓波. 滇东南泸江流域岩溶地下水质量及污染影响因素研究[J]. 地球学报, 2021, 42(3):352-362.
WANG Bo, WANG Yu, ZHANG Gui, ZHANG Hua, DAI Xusheng, KANG Xiaobo. A study of quality and pollution factors of karst groundwater in Lujiang river basin in southeast Yunnan[J]. Acta Geoscientica Sinica, 2021, 42(3): 352-362.
[20] Jiao S L, Tao Z, Gao Q Z, Liu K, She J W, Ding J, Liu Z F. Stable isotopic composition of riverine dissolved inorganic carbon of the Xijiang river inner estuary[J]. Journal of Geographical Sciences, 2008, 18(3): 363-372. doi: 10.1007/s11442-008-0363-3
[21] Li T K, Liu B S, Bi X H, Wu J H, Zhang Y F, Feng Y C. Size and chemical characteristics of particles emitted from typical rural biomass cookstoves in North China[J]. Atmospheric Research, 2021, 249(30): 105295.
[22] Hilmi A, Ulfa A M, Wijaya A, Hadimi L I. Study of seawater intrusion in coastal aquifer using total dissolved solid, conductivity and salinity measurement in Labuhan Kertasari village, West Sumbawa[J]. Journal of Physics: Conference Series, 2021, 1816(1): 12064.
[23] Helard D, Indah S, Wilandari M. Spatial variation of electrical conductivity, total suspended solids, and total dissolved solids in the Batang Arau river, west Sumatera, Indonesia[J]. IOP Conference Series: Materials Science and Engineering, 2021, 1041(1): 12027.
[24] Godbole K, Mondal K. Effect of salinity, total dissolved solids, conductivity, and pH on corrosion behavior of different microstructures made from high-carbon rail steel[J]. Journal of Materials Engineering and Performance, 2022, 31(7): 5630-5640. doi: 10.1007/s11665-022-06630-w
[25] Ariwibowo K L, Riski A M, Fajarulloh A S, Putranto T T. Analysis of the distribution of seawater intrusion using electrical conductivity and total dissolved solid data and intelligence for residents in Sayung district, Demak Regency[J]. IOP Conference Series: Earth and Environmental Science, 2021, 851(1): 12020. doi: 10.1088/1755-1315/851/1/012020
[26] Yan W H, Chen Y L, Han L F, Sun Y, Song F H, Yang Y, Sun H R. Pyrogenic dissolved organic matter produced at higher temperature is more photoactive: Insight into molecular changes and reactive oxygen species generation[J]. Journal of Hazardous Materials, 2022, 425: 127817.
[27] Tréguer P J, Sutton J N, Brzezinski M, Charette M A, Devries T, Dutkiewicz S, Ehlert C, Hawkings J, Leynaert A, Liu S M, Monferrer N L, López-Acosta M, Maldonado M, Rahman S, Ran L H, Rouxel O. Reviews and syntheses: The biogeochemical cycle of silicon in the modern ocean[J]. Biogeosciences, 2021, 18(4): 1269-1289. doi: 10.5194/bg-18-1269-2021
[28] Gao Z J, Tong H, Su Q, Liu J T, Gao F S, Han C. Hydrochemical characteristics and cause analysis of natural water in the southeast of Qinghai-Tibet Plateau[J]. Water, 2021, 13(23): 3345. doi: 10.3390/w13233345
[29] Schlavo M A, Hauser S, Povinec P P. Isotope distribution of dissolved carbonate species in southeastern coastal aquifers of Sicily (Italy)[J]. Hydrological Processes, 2007, 21(20): 2690-2697. doi: 10.1002/hyp.6498
[30] Li S L, Liu C Q, Lang Y C, Tao F X, Zhao Z Q, Zhou Z H. Stable carbon isotope biogeochemistry and anthropogenic impacts on karst ground water, Zunyi, Southwest China[J]. Aquatic Geochemistry, 2008, 14(3): 211-221. doi: 10.1007/s10498-008-9033-4
[31] Feth J H, Gibbs R J. Mechanisms controlling world water chemistry: Evaporation-crystallization process[J]. Science, 1971, 172(3985): 870-872. doi: 10.1126/science.172.3985.870
[32] Long X, Sun Z Y, Zhou A G, Liu D L. Hydrogeochemical and isotopic evidence for flow paths of karst waters collected in the Heshang cave, Central China[J]. Journal of Earth Science, 2015, 26(1): 149-156. doi: 10.1007/s12583-015-0522-2
[33] Han G L, Liu C Q. Water geochemistry controlled by carbonate dissolution: A study of the river waters draining karst-dominated terrain, Guizhou Province, China[J]. Chemical Geology, 2004, 204(1-2): 1-21. doi: 10.1016/j.chemgeo.2003.09.009
[34] 莫春梦, 黄芬, 胡晓农, 曹建华, 辛胜林, 张连凯. 硫酸和硝酸对桂林毛村碳酸盐岩溶蚀的室内模拟[J]. 中国岩溶, 2021, 40(4):608-616.
MO Chunmeng, HUANG Fen, HU Xiaonong, CAO Jianhua, XIN Shenglin, ZHANG Liankai. Laboratory simulation of the dissolution of carbonate rocks sampled from Maocun, Guilin by sulfuric acid and nitric acid[J]. Carsologica Sinica, 2021, 40(4): 608-616.
[35] Sun H G, Han J T, Li D, Zhang S R, Lu X X. Chemical weathering inferred from riverine water chemistry in the lower Xijiang basin, South China[J]. Science of the Total Environment, 2011, 408(20): 4749-4760.
[36] Xu Z F, Liu C Q. Chemical weathering in the upper reaches of Xijiang river draining the Yunnan–Guizhou Plateau, Southwest China[J]. Chemical Geology, 2007, 239(1-2): 83-95. doi: 10.1016/j.chemgeo.2006.12.008
[37] Zhang S R, Lu X X, Sun H G, Han J T, Higgitt D L . Major ion chemistry and dissolved inorganic carbon cycling in a human-disturbed mountainous river (the Luodingjiang river) of the Zhujiang (Pearl river), China[J]. Science of the Total Environment, 2009, 407(8): 2796-2807. doi: 10.1016/j.scitotenv.2008.12.036
[38] 吕婕梅. 人类活动影响下喀斯特小流域岩石风化与大气CO2的源汇效应关系研究[D]. 贵阳: 贵州大学, 2018.
LYU Jiemei. The hydrochemical characteristics and source-sink effects for atmospheric CO2 of small karst river under the influence of anthropogenic activities[D]. Guiyang: Guizhou University, 2018.
[39] Sun H G, Han J, Zhang S R, Lu X X. Carbon isotopic evidence for transformation of DIC to POC in the lower Xijiang river, SE China[J]. Quaternary International, 2015, 380(9): 288-296.
[40] 彭建堂, 胡瑞忠. 湘中锡矿山超大型锑矿床的碳, 氧同位素体系[J]. 地质论评, 2001, 47(1):34-41.
PENG Jiantang, HU Ruizhong. Carbon and oxygen isotope systematics in the Xikuangshan giant antimony deposit, central Hunan[J]. Geological Review, 2001, 47(1): 34-41.
[41] 曹建华, 杨慧, 康志强. 区域碳酸盐岩溶蚀作用碳汇通量估算初探:以珠江流域为例[J]. 科学通报, 2011, 56(26):2181-2187.
CAO Jianhua, YANG Hui, KANG Zhiqiang. Preliminary regional estimation of carbon sink flux by carbonate rock corrosion: A case study of the Pearl river basin[J]. Chinese Science Bulletin, 2011, 56(26): 2181-2187.
[42] Zhang J, Quay P D, Wilbur D O. Carbon isotope fractionation during gas-water exchange and dissolution of CO2[J]. Geochimica et Cosmochimica Acta, 1995, 59(1): 107-114. doi: 10.1016/0016-7037(95)91550-D
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