Novel geochemistry-inspired method for the deep removal of vanadium from molybdate solution.
Novel geochemistry-inspired method for the deep removal of vanadium from molybdate solution.
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DOI：
10.1016/j.jhazmat.2017.02.051
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发表时间：
2017-06
影响因子：
13.6
通讯作者：
Jialiang Zhang;Yuping Deng;Qiuyue Zhou;Peixin Qin;Yubo Liu;Chengya Wang
中科院分区：
文献类型：
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作者：
Jialiang Zhang;Yuping Deng;Qiuyue Zhou;Peixin Qin;Yubo Liu;Chengya Wang
从钼酸盐中分离钒是处理危险的废加氢脱硫 (HDS) 催化剂浸出液的一项重要任务。在本研究中，Mo 和 V 的主要天然矿物形式的差异启发我们开发一种使用 Fe3O4 作为吸附剂从钼酸盐溶液中深度去除 V 的方法。首先采用共沉淀法合成了吸附剂，然后通过 XRD、TEM 和 VSM 对其进行了表征。合成材料由纯 Fe3O4 纳米颗粒组成，具有顺磁性，饱和磁化强度为 68.6 emu g−1。使用不同条件下的批量吸附实验研究了 V 去除效率。结果表明，在 pH 7.0–11.0 的不同浓度的钼酸盐溶液中，V 可以在 5 分钟内被深度去除。吸附剂重复使用4次后，吸附率略有下降。所得钼酸盐溶液中V含量低于0.02 g L−1，满足制备高质量产品的要求。最后，基于Fe3O4吸附剂优异的V去除性能和快速的分离速率，提出了从废HDS催化剂浸出液中分离Mo和V的工艺流程图。
Separation of vanadium from molybdates is an essential task for processing the leaching solution of hazardous spent hydrodesulphurization (HDS) catalyst. In this study, the difference in the main naturally occurring mineral forms of Mo and V inspired us to develop a method for the deep removal of V from molybdate solution using Fe3O4as an adsorbent. First, the adsorbent was synthesized with coprecipitation method, and then it was characterized by XRD, TEM, and VSM. The synthesized material consisted of pure Fe3O4nanoparticles that exhibited paramagnetic property, with a saturated magnetization of 68.6 emu g−1. The V removal efficiency was investigated using batch adsorption experiments in varying conditions. Results indicated that V could be deeply removed from various concentrations of molybdate solution at pH of 7.0–11.0 within 5 min. A slight decrease was found in the adsorption ratio after the adsorbent had been reused for 4 cycles. The resulting molybdate solution contained less than 0.02 g L−1of V, which satisfies the requirement for preparing high-quality products. Finally, a process flowchart is presented for the separation of Mo and V from the leaching solution of spent HDS catalyst, based on the excellent V removal performance and rapid separation rate of the Fe3O4adsorbent.