Vanadium is a trace metal that is relatively abundant in the Earth (~100 part per million in the upper crust).
Vanadium can enter the atmosphere through wind erosion and volcanic emissions[1] and will remain there until it is removed by precipitation.
[2] Vanadium is abundant in fossil fuels because it is incorporated in porphyrins during organic matter degradation.
[1] Vanadium is also mined and using for industrial purposes including for steel reinforcement, electronics, and batteries.
[1] Vanadium is removed from the ocean by burial marine sediments and incorporation into iron oxides at hydrothermal vents.