Efficient and environment-friendly vanadium (V) extraction from vanadium shale leachate using tri-n-octylmethylammonium chloride
Efficient and environment-friendly vanadium (V) extraction from vanadium shale leachate using tri-n-octylmethylammonium chloride
复制标题
三正辛基甲基氯化铵从钒页岩渗滤液中高效环保提取钒（V）
DOI：
10.1016/j.seppur.2019.116482
复制
发表时间：
2020-04-15
影响因子：
8.6
通讯作者：
Hu, Pengcheng
中科院分区：
文献类型：
--
作者：
Luo, Dashuang;Huang, Jing;Hu, Pengcheng
提出了一种利用离子液体三辛基甲基氯化铵（TOMAC）从钒页岩浸出液中回收钒的高效、环保方法。研究了TOMAC萃取反萃钒的主要影响因素。在以下条件下提取了显著量（93.18%）的钒，几乎没有杂质：TOMAC的浓度为20体积%;作为相改性剂的2-辛醇的浓度为15体积%;相比（O/A）为1：10。用0.8mol/LNaOH和1.2mol/LNaCl的混合溶液可定量反萃负载有机相中90%以上的钒。负载有机相的反萃取和再生可以一步完成。同时，采用傅里叶变换红外光谱（FT-IR）分析了萃取反萃的阴离子交换机理。此外，NaOH-NaCl协同反萃体系反萃的有机相即使经过多次循环也保持了相对较高的萃取效率（> 90%），这表明所开发的体系是环境友好的，并且对于回收钒是有效的。
In this work, an efficient and environmentally friendly method for recovering V (V) from vanadium shale leachate using an ionic liquid, tri-n-octylmethylammonium chloride (TOMAC), was proposed. The main factors affecting the extraction and stripping of vanadium using TOMAC were studied. A significant quantity (93.18%) of vanadium was extracted with almost no impurities under the following conditions: the concentration of TOMAC was 20 vol%; the concentration of 2-octanol as the phase modifier was 15 vol%; the phase ratio (O/A) was 1:10. More than 90% of vanadium in the loaded organic phase could be stripped quantitatively using a mixed solution of 0.8 mol/L NaOH and 1.2 mol/L NaCl. The stripping and regeneration of the loaded organic phase could be carried out in one step. Meanwhile, the anion exchange mechanism of extraction and stripping was analyzed by Fourier transform infrared (FT-IR) spectroscopy. Moreover, the organic phase stripped by the NaOH-NaCl synergistic stripping system maintained a relatively high extraction efficiency (> 90%) even across many cycles, which indicated that the developed system is environmentally friendly and efficient for the recovery of vanadium.