Vanadium Biogeochemistry in Soil and Water Systems

Vanadium is a transition metal of growing interest in environmental science due to its dualistic role as both a micronutrient and a potential toxin. Occurring in soils primarily through weathering of bedrock and anthropogenic inputs such as mining, fossil-fuel combustion and metallurgy, it cycles through multiple oxidation states (V(III), V(IV) and V(V)). Soil factors including pH, redox potential, organic matter content and clay mineralogy govern the speciation, mobility and bioavailability of vanadium. In oxic soils and surface waters vanadium predominantly exists as the vanadate oxyanion (V(V)), which is strongly sorbed by iron and manganese oxyhydroxides and organic colloids. Under reducing conditions or in the presence of organic chelators and microbial activity, V(V) can be transformed to less mobile V(IV) and V(III), affecting its transport to groundwater and uptake by plants. In aquatic environments, salinity gradients, dissolved organic matter and estuarine mixing zones further influence redox speciation, with implications for its fate, bioavailability and ecological risks. Understanding the interplay of abiotic sorption processes, microbially mediated redox reactions and ligand complexation is essential for predicting vanadium distribution at regional to global scales, informing remediation strategies such as phytoremediation, engineered sorbents and biostimulation, and assessing potential impacts on crop productivity, water quality and human health.

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Vanadium Biogeochemistry in Soil and Water Systems publication trend

The graph below shows the total number of articles in vanadium biogeochemistry in soil and water systems across all publications each year (not limited to Nature Index journals).

Technical terms

Speciation: The distribution of an element among different chemical forms, oxidation states or molecular complexes.

Redox potential (Eh): A measure of the tendency of a chemical environment to gain or lose electrons, influencing oxidation states of elements.

Bioavailability: The fraction of a substance that is accessible for uptake by living organisms.

Adsorption: The accumulation of ions or molecules at the surface of a solid phase, such as mineral oxides or organic matter.

Oxyanion: A negatively charged species of an element bonded to oxygen, as in vanadate (VO43–) for V(V).

References

1. A Dual Role of Vanadium in Environmental Systems—Beneficial and Detrimental Effects on Terrestrial Plants and Humans. Plants (2021).
2. Mobility, Bioavailability, and Toxicity of Vanadium Regulated by Physicochemical and Biological Properties of the Soil. Journal of Soil Science and Plant Nutrition (2023).
3. Vanadate Retention by Iron and Manganese Oxides. ACS Earth and Space Chemistry (2022).
4. Reduction of Vanadium(V) by Iron(II)-Bearing Minerals. Minerals (2021).
5. Redox Speciation of Vanadium in Estuarine Waters Using Improved Methodology Based on Anion Exchange Chromatography Coupled to HR ICP-MS System. Molecules (2021).