Determination and risk assessment of vanadium in the coastal sediment of Zhoushan
Vanadium is frequently detected in marine environments,and its substantial adsorption and slow degradation in sediments pose a threat to marine biota safety.Therefore,monitoring vanadium in marine sediments is essential.This study optimized the detection method for vanadium in marine sediments,determining that the HNO3+HF+HClO4 system with microwave digestion yielded the best results.By optimizing instrument conditions and improving the method,the detection limit was reduced to 0.72 μg/L,precision(RSD)was below 6%,and the spiked recovery rate ranged from 90.1%to 107.4%.These improvements meet the analytical requirements for vanadium in marine sediments.The optimized method was applied to investigate vanadium levels in sediments from the coastal area near Zhoushan.The results showed that the vanadium content in this region's sediments was abundant,with concentrations ranging from 112.87 mg/kg to 166.25 mg/kg.Ecological risk assessment of vanadium in the sediments indicated a moderate risk level.
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