Geochemical evaluation and the mechanism controlling groundwater chemistry using chemometric approach and groundwater pollution index (GPI) in the Kishangarh city of Rajasthan, India

Kumar, Manish; Garg, Vipin; Kumar, Ramesh; Kumar, Rajesh

doi:10.1007/s11356-024-33669-0

Environ Sci Pollut Res

2024

DOI: 10.1007/s11356-024-33669-0

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Geochemical evaluation and the mechanism controlling groundwater chemistry using chemometric approach and groundwater pollution index (GPI) in the Kishangarh city of Rajasthan, India

Manish Kumar,

Vipin Garg,

Ramesh Kumar

et al.

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Shallow groundwater near a deep-well CO2 storage site – 15 years of stable water quality for agricultural use

Zhou,

Zhang,

Callahan

et al. 2024

Preprint

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Injecting CO2 into deep geological formations can be an effective carbon-removal and storage technology to mitigate global climate change. Interaction of injected CO2 with rock formations changes pH and hydrochemistry within the deep injection zone (> 800 m depth). However, cap rocks and multiple tight aquitards typically act as barriers to protect the shallow aquifer from changes in the injection zone. Monitoring and evaluation of shallow groundwater quality is essential to verify that carbon capture storage projects (CCS) do not impact the near-surface environment. This study investigated shallow groundwater quality using long-term data (2006–2023) from a regular monitoring program at the Otway International Test Centre (OITC) in Victoria, Australia. It was found that shallow groundwater quality was stable over at least 15 years, during which time three phases of CO2 injection into a deep storage zone occurred. The results highlighted groundwater quality complied with guidelines of Food and Agriculture Organization (FAO) and Australian water quality guidelines. Minor and localized changes observed in salinity or pH in shallow monitoring piezometers were caused by natural processes. Moreover, a wide range of groundwater quality indicators were evaluated. The results demonstrated that the groundwater quality of shallow aquifers (< 80 m) at OITC is suitable for agriculture. The study provides assurance and confidence to stakeholders that the quality of the near-surface environment has not been impacted by CO2 injection into confined formations and no pollution has been detected. Although numerous CCS sites around the world are subject to monitoring, no evidence of changes in shallow groundwater quality has been reported that could be traced to CO2 injection in confined formations at > 800 m depth.

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Shallow groundwater near a deep-well CO2 storage site – 15 years of stable water quality for agricultural use

Zhou,

Zhang,

Callahan

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

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Geochemical evaluation and the mechanism controlling groundwater chemistry using chemometric approach and groundwater pollution index (GPI) in the Kishangarh city of Rajasthan, India

Cited by 1 publication

References 64 publications

Shallow groundwater near a deep-well CO2 storage site – 15 years of stable water quality for agricultural use

Shallow groundwater near a deep-well CO2 storage site – 15 years of stable water quality for agricultural use

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