globalchange  > 气候变化与战略
DOI: 10.5194/hess-24-2167-2020
论文题名:
Isotopic and chromatographic fingerprinting of the sources of dissolved organic carbon in a shallow coastal aquifer
作者: T. Meredith K.; Baker A.; S. Andersen M.; M. O'Carroll D.; Rutlidge H.; K. McDonough L.; Oudone P.; Bryan E.; Syahiza Zainuddin N.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期:4
起始页码: 2167
结束页码: 2178
语种: 英语
Scopus关键词: Analytical geochemistry ; Anoxic water ; Aquifers ; Groundwater resources ; Hydrogeology ; Isotopes ; Liquid chromatography ; Stream flow ; Surface waters ; Carbon isotopic composition ; Chromatographic fingerprinting ; Dissolved organic carbon ; Groundwater residence time ; Median concentration ; Organic carbon detection ; Organic matter processing ; Surface water sources ; Organic carbon ; aquifer pollution ; carbon isotope ; coastal aquifer ; concentration (composition) ; detection method ; dissolved organic carbon ; geochemical method ; hydrology ; paleosol ; shallow water
英文摘要: The terrestrial subsurface is the largest source of freshwater globally. The organic carbon contained within it and processes controlling its concentration remain largely unknown. The global median concentration of dissolved organic carbon (DOC) in groundwater is low compared to surface waters, suggesting significant processing in the subsurface. Yet the processes that remove this DOC in groundwater are not fully understood. The purpose of this study was to investigate the different sources and processes influencing DOC in a shallow anoxic coastal aquifer. Uniquely, this study combines liquid chromatography organic carbon detection with organic (13CDOC) carbon isotope geochemical analyses to fingerprint the various DOC sources that influence the concentration, carbon isotopic composition, and character with respect to distance from surface water sources, depth below surface, and inferred groundwater residence time (using 3H activities) in groundwater. It was found that the average groundwater DOC concentration was 5 times higher (5 mg Lo1) than the global median concentration and that the concentration doubled with depth at our site, but the chromatographic character did not change significantly. The anoxic saturated conditions of the aquifer limited the rate of organic matter processing, leading to enhanced preservation and storage of the DOC sources from peats and palaeosols contained within the aquifer. All groundwater samples were more aromatic for their molecular weight in comparison to other lakes, rivers and surface marine samples studied. The destabilization or changes in hydrology, whether by anthropogenic or natural processes, could lead to the flux of up to 10 times more unreacted organic carbon from this coastal aquifer compared to deeper inland aquifers. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162711
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: T. Meredith, K., Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia, Connected Waters Initiative Research Centre, UNSW Sydney, High St., Kensington, NSW 2052, Australia; Baker, A., Connected Waters Initiative Research Centre, UNSW Sydney, High St., Kensington, NSW 2052, Australia, School of Biological, Earth and Environmental Sciences, UNSW Sydney, High St., Kensington, NSW 2052, Australia; S. Andersen, M., Connected Waters Initiative Research Centre, UNSW Sydney, High St., Kensington, NSW 2052, Australia, School of Civil and Environmental Engineering, UNSW Sydney, High St., Kensington, NSW 2052, Australia; M. O'Carroll, D., Connected Waters Initiative Research Centre, UNSW Sydney, High St., Kensington, NSW 2052, Australia, School of Civil and Environmental Engineering, UNSW Sydney, High St., Kensington, NSW 2052, Australia; Rutlidge, H., Connected Waters Initiative Research Centre, UNSW Sydney, High St., Kensington, NSW 2052, Australia, School of Civil and Environmental Engineering, UNSW Sydney, High St., Kensington, NSW 2052, Australia; K. McDonough, L., Connected Waters Initiative Research Centre, UNSW Sydney, High St., Kensington, NSW 2052, Australia, School of Biological, Earth and Environmental Sciences, UNSW Sydney, High St., Kensington, NSW 2052, Australia; Oudone, P., Connected Waters Initiative Research Centre, UNSW Sydney, High St., Kensington, NSW 2052, Australia, School of Biological, Earth and Environmental Sciences, UNSW Sydney, High St., Kensington, NSW 2052, Australia; Bryan, E., Golder Associates, 124 Pacific Highway, St. Leonards, Sydney, NSW 2065, Australia; Syahiza Zainuddin, N., Faculty of Civil Engineering, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia

Recommended Citation:
T. Meredith K.,Baker A.,S. Andersen M.,et al. Isotopic and chromatographic fingerprinting of the sources of dissolved organic carbon in a shallow coastal aquifer[J]. Hydrology and Earth System Sciences,2020-01-01,24(4)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[T. Meredith K.]'s Articles
[Baker A.]'s Articles
[S. Andersen M.]'s Articles
百度学术
Similar articles in Baidu Scholar
[T. Meredith K.]'s Articles
[Baker A.]'s Articles
[S. Andersen M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[T. Meredith K.]‘s Articles
[Baker A.]‘s Articles
[S. Andersen M.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.