Chemical and carbon isotopic composition of dissolved organic carbon in a regional confined methanogenic aquifer

被引：16
作者：
Aravena, R
Wassenaar, LI
Spiker, EC
机构：
[1] Univ Waterloo, Dept Earth Sci, Waterloo, ON N2L 3G1, Canada
[2] Environm Canada, Natl Hydrol Res Inst, Saskatoon, SK S7N 3H5, Canada
[3] US Geol Survey, Natl Ctr, Reston, VA 22092 USA
来源：
ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES | 2004年 / 40卷 / 02期
关键词：
carbon isotopes; chemical characterization; dissolved organic carbon; groundwater; sources;
D O I：
10.1080/10256010410001671050
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
This study demonstrates the advantage of a combined use of chemical and isotopic tools to understand the dissolved organic carbon (DOC) cycle in a regional confined methanogenic aquifer. DOC concentration and carbon isotopic data demonstrate that the soil zone is a primary carbon source of groundwater DOC in areas close to recharge zones. An in-situ DOC source linked to organic rich sediments present in the aquifer matrix is controlling the DOC pool in the central part of the groundwater flow system. DOC fractions, C-13-NMR on fulvic acids and C-14 data on DOC and CH4 support the hypothesis that the in-situ DOC source is a terrestrial organic matter and discard the Ordovician bedrock as a source of DOC.
引用
收藏
页码：103 / 114
页数：12
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