| http://www.w3.org/ns/prov#value | - s, and textile industry; (2) the production of certain metals such as iron and uranium, with V as a secondary product [2], vanadium concentrations up to 738???mg/kg [7] and 3505???mg/kg [1] have been reported in mining areas; (3) air emission of V from the combustion of fossil fuels [8].
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