Multiple studies demonstrate that oxygen isotope exchange occurs between dissolved or gaseous carbon dioxide and water, a process that can occur both abiotically and via enzymatic catalysis in various environments.
Papers [0] and [4] explicitly discuss and investigate oxygen isotope exchange between carbon dioxide and water (in flasks and soils respectively), fully supporting the claim. The remaining papers cover unrelated topics such as photocatalysis, ocean dissolved oxygen budgets, phosphorus isotope exchange, or carbon monoxide kinetics, and are therefore omitted as tangential.