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Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

机译:使用柠檬汁有机酸从粉煤灰的超声辅助涂抹钒

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摘要

In this work, vanadium (V) was selectively extracted from fuel-oil fly ash using a leaching process utilizing organic acids extracted from lemon juice with assistance from ultrasound and H2O2. Response Surface Methodology (RSM) was used to optimize the main operating factors. The V recovery was 88.7% at the optimal conditions: 27.9% (v/v) lemon juice, 10% (v/v) hydrogen peroxide (H2O2), solid/liquid (S/L) ratio 0.01% (w/v), ultrasound power 159 W at 20 kHz in 2 h, and initial temperature of 35 degrees C. The effect of time on the V recovery was examined. The maximum recovery was 100% after 3 h. Furthermore, the individual effects of ultrasound and H2O2 on V recovery were studied, and the results showed that without H2O2 and ultrasound, the V recovery decreased greatly, indicating that both factors were essential in the leaching process. According to the modified shrinking core model, test results indicated that mass diffusion was the controlling step of the overall reaction kinetics. The activation energy of the leaching reaction in the temperature range 25 to 65 degrees C was found to be 17.1 kJ mol(-1).
机译:在这项工作中,使用使用来自超声和H 2 O 2的辅助,从燃料 - 油粉煤灰选择性地从燃料 - 油粉粉体中选择性地提取钒(V)。响应表面方法(RSM)用于优化主要操作因素。最佳条件下的V回收率为88.7%:27.9%(v / v)柠檬汁,10%(v / v)过氧化氢(H2O2),固体/液体(s / l)比为0.01%(w / v) ,超声波功率159W在2小时内以20kHz,初始温度为35摄氏度。检查了对V恢复的时间效果。 3小时后,最大回收率为100%。此外,研究了超声和H2O2对V恢复的个体效果,结果表明,没有H2O2和超声波,V恢复大大降低,表明这两个因素在浸出过程中是必不可少的。根据改性的收缩核心模型,测试结果表明,质量扩散是整个反应动力学的控制步骤。发现在25至65℃的温度范围内的浸出反应的活化能量为17.1kJ摩尔(-1)。

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  • 来源
    《RSC Advances》 |2020年第3期|共12页
  • 作者单位

    Univ Kurdistan Dept Engn Chem Engn Grp Sanandaj Iran;

    Univ Kurdistan Dept Engn Chem Engn Grp Sanandaj Iran;

    Univ Kurdistan Dept Engn Chem Engn Grp Sanandaj Iran;

    Ohio Univ Dept Chem &

    Biomol Engn Athens OH 45701 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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