Tracing anthropogenic DIC in urban streams based on isotopic and geochemical tracers

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• 作者：Woo-Jin Shin ; Kwang-Sik Lee ; Youngyun Park ; Dongho Lee…
• 关键词：Urban stream ; Dissolved inorganic carbon ; Soil weathering ; Sewages ; Carbon isotopes
• 刊名：Environmental Earth Sciences
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：74
• 期：3
• 页码：2707-2717
• 全文大小：1,421 KB
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• 作者单位：Woo-Jin Shin (1)
  Kwang-Sik Lee (1) (2)
  Youngyun Park (3)
  Dongho Lee (1)
  Eun-Ji Yu (2)
  
  1. Division of Earth and Environmental Science, Korea Basic Science Institute, Ochang, 363-883, Republic of Korea
  2. Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon, 305-764, Republic of Korea
  3. Department of Geology, Kangwon National University, Chuncheon, 200-701, Republic of Korea
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

To elucidate the type and extent of anthropogenic DIC (dissolved inorganic carbon), carbon isotopic composition of DIC and dissolved ion concentration were determined in three streams (Gap, Yudeung and Daejeon) draining populated Daejeon metropolitan area, South Korea. Seasonal variations in water chemistry and carbon isotopic composition of DIC (δ13CDIC) reflected changing contribution from two main DIC sources, i.e., soil weathering and sewages. DIC input from the soil weathering was characterized by δ13CDIC values ranging from ?6.7 to ?6.0?-and higher during Jun–Nov. The sewage-derived DIC became dominant during Dec–May with δ13CDIC values ranging from ?1.4 to ?.4?- Si and Cl served as indicators of DIC inputs from soil weathering and sewages, respectively. The higher δ13CDIC values of sewages in the study area indicated that detergents (δ13CDIC of ?2.0 to ?.5?- carried by the urban sewages were the main anthropogenic DIC component. The extent of anthropogenic DIC relative to soil-derived DIC in stream waters increased when the precipitation was low and discharge decreased. The results of this study provide a method to quantify anthropogenic DIC, which can help manage water quality in urban stream waters.