钒
柠檬酸
浸出(土壤学)
化学
硫酸盐
无机化学
萃取(化学)
螯合作用
溶剂萃取
核化学
色谱法
有机化学
环境科学
土壤科学
土壤水分
作者
C Ma,Xiaobo Zhu,Wang Li
出处
期刊:Social Science Research Network
[Social Science Electronic Publishing]
日期:2023-01-01
摘要
The recovery of vanadium from the sulfate leaching solution is crucial for resource sustainability and environmental protection. But the leaching solution contains impurities like Fe(III), which have a significant impact on the separation and enrichment of vanadium because a) separation of Fe(III) and V(IV) by solvent extraction is problematic b) when oxygen from the air is present, it is challenging to fully decrease Fe(III) to Fe(II). Citric acid was used as a complexing agent in the aqueous phase to complex the Fe(III), and the effect of extraction of V(IV) by P507 after complexation of Fe(III) with citric acid was investigated. To determine the complexation dose necessary for full Fe(III) complexation, the number of ligands in citric acid and Fe(III) complexes were estimated and the complexation mechanism of citric acid with Fe(III) was further clarified with UV-Vis and FT-IR. According to experimental findings, citric acid exhibited a better complexing action than other complexing agents. Citric acid may complex>96% of Fe(III) in liquid phase when the molar ratio of citric acid to Fe(III) was 1.5. When the pH was 1.2 and the molar ratio of citric acid to Fe(III) was 2 of the solution, the extraction rate of V(IV) was more than 80% and of Fe(III) was less than 1% by P507 while the maximum separation factor βV/Fe was 430, which achieved the complete removal of Fe(III).
科研通智能强力驱动
Strongly Powered by AbleSci AI