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- W2238716863 abstract "On Mobilization of Lead and Arsenic in Groundwater in Response to CO 2 Leakage from Deep Geological Storage Liange Zheng a* , John A. Apps a , Yingqi Zhang a , Tianfu Xu a , Jens T. Birkholzer a a Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Mail Stop 90-1116, Berkeley, CA, USA Corresponding author: Tel: 1 510 486 5502, Fax: 1 510 486 5686, email: lzheng@lbl.gov (Liange Zheng) Abstract If carbon dioxide stored in deep saline aquifers were to leak into an overlying aquifer containing potable groundwater, the intruding CO 2 would change the geochemical conditions and cause secondary effects mainly induced by changes in pH In particular, hazardous trace elements such as lead and arsenic, which are present in the aquifer host rock, could be mobilized. In an effort to evaluate the potential risks to potable water quality, reactive transport simulations were conducted to evaluate to what extent and mechanisms through which lead and arsenic might be mobilized by intrusion of CO 2 . An earlier geochemical evaluation of more than 38,000 groundwater quality analyses from aquifers throughout the United States and an associated literature review provided the basis for setting up a reactive transport model and examining its sensitivity to model variation. The evaluation included identification of potential mineral hosts containing hazardous trace elements, characterization of the modal bulk mineralogy for an arenaceous aquifer, and augmentation of the required thermodynamic data. The reactive transport simulations suggest that CO 2 ingress into a shallow aquifer can mobilize significant lead and arsenic, contaminating the groundwater near the location of intrusion and further downstream. Although substantial increases in aqueous concentrations are" @default.
- W2238716863 created "2016-06-24" @default.
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- W2238716863 date "2010-03-30" @default.
- W2238716863 modified "2023-09-27" @default.
- W2238716863 title "On mobilization of lead and arsenic in groundwater in response to CO2 leakage from deep geological storage" @default.
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