Detecting the calcium carbonate saturation state under the stress of ocean acidification using saturometry technique

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Shi, Tingting^1 ; Wang, Ying^1 ; Zhao, Yidong^1 ; Loucaides, Socratis^2

Tianjin Research Institute for Water Transport Engineering, Tianjin, China^1

Ocean and Earth Science, National Oceanography Centre, Southampton, United Kingdom^2

关键词: Carbonate saturations;    Conductivity measurements;    Conductivity ratio;    Flow-through experiments;    Marine carbonates;    Marine organisms;    Ocean acidifications;    On conductivities;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/6/062027/pdf
DOI  :  10.1088/1755-1315/227/6/062027

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

CO2-induced ocean acidification lowers the degree of carbonate saturation state of the seawater, which affects calcification of marine organisms and influences the marine carbonate cycle, thus have negative impacts on the entire marine biogeochemical system. This study seeks to develop a rapid technique to detect carbonate saturation state of seawater based on conductivity changes. A series of batch and flow-through experiments were conducted using various CaCO3 materials. Results show that the conductivity ratios of seawater with and without carbonate addition increase generally with decreasing carbonate saturation states (Ω). The relationship between conductivity ratio and log10Ω apparently follows a linear trend when Ω