Exploring pore water biogeochemical characteristics as environmental monitoring proxies for a CO^sub 2^ storage project in Pohang Basin, South Korea

Biogeochemical parameters of pore waters, including dissolved organic matter, nutrients, sulfate, alkalinity, and chloride are explored as convenient and sensitive proxies to monitor the CO2 geological storage sites. Five sites for a CO2 storage project in the Pohang Basin of the East Sea in South K...

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Bibliographic Details
Published in:Marine pollution bulletin 2018-12, Vol.137, p.331
Main Authors: Chen, Meilian, Park, Myongho, Kim, Ji-Hoon, Shinn, Young Jae, Lee, Yun Kyung, Hur, Jin
Format: Article
Language:English
Subjects:
Alkalinity
Biogeochemistry
Blanking
Carbon dioxide
Carbon sequestration
Dissolved organic carbon
Dissolved organic matter
Environmental monitoring
Fluorescence
Geological faults
Geology
Mineral nutrients
Nutrients
Organic matter
Parameter robustness
Parameters
Pore water
Runoff
Storage
Sulfates
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Summary:Biogeochemical parameters of pore waters, including dissolved organic matter, nutrients, sulfate, alkalinity, and chloride are explored as convenient and sensitive proxies to monitor the CO2 geological storage sites. Five sites for a CO2 storage project in the Pohang Basin of the East Sea in South Korea were investigated for the pre-injection biogeochemical conditions of these sites. Higher dissolved organic carbon (~36 mg L−1), chromophoric and fluorescent dissolved organic matter, nutrients, and alkalinity were observed in a fluvially affected acoustic blanking site with geological faults. A general increasing downcore trend of measured DOM parameters, nutrients, and alkalinity with depth was found at the acoustic blanking site affected by riverine runoff with significant correlations among the parameters (R2: ~0.4–0.8), highlighting the impact of geological features and external inputs on the downcore biogeochemical properties. The results presented in this study suggest that DOM could be utilized as a robust and complementary biogeochemical parameter.
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2018.10.036