Quick valence analysis method of vanadium toward accurate toxicity assessment of vanadium-containing hazardous wastes |
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Affiliation: | College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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Abstract: | In order to develop a quick, efficient and sensitive valence analysis method of vanadium(V), the high- performance liquid chromatography (HPLC) was utilized to separate and quantify EDTA-complexed V(III), V(IV) and V(V) ions. The influence of EDTA, TBAOH, solution pH and organic modifier on retention behavior of V−EDTA complexes was investigated. Complexed V(III), V(IV) and V(V) ions can be separated and quantified in 5 min, with detection limits of 0.04 mg/L V(III), 0.07 mg/L V(IV), and 0.06 mg/L V(V), respectively. The established method is applied to analyzing the hazardous waste of V−Cr-bearing reducing slag and results demonstrate 49.94% of its V element to be toxic V(V). This work opens a new avenue for quick and accurate toxicity assessment of hazardous wastes containing multivalent heavy metals. |
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Keywords: | vanadium valence HPLC-UV mass spectrometry EDTA |
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