Selective recovery of heavy rare earth elements from apatite with an adsorbent bearing immobilized tridentate amido ligands
Selective recovery of heavy rare earth elements from apatite with an adsorbent bearing immobilized tridentate amido ligands
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DOI：
10.1016/j.seppur.2016.01.008
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发表时间：
2016-02-08
影响因子：
8.6
通讯作者：
Watanabe, Yasushi
中科院分区：
文献类型：
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作者：
Ogata, Takeshi;Narita, Hirokazu;Watanabe, Yasushi
磷灰石用于生产磷肥，含有少量稀土元素（REEs; 0.1-1%）。磷灰石矿床遍布世界各地，因此有可能成为稀土元素的安全来源。我们研究了从磷灰石样品中回收稀土的方法;具体地说，稀土从样品中浸出与硫酸溶液，酸是最常用的肥料生产。在高H2SO 4浓度下，溶液中的大部分稀土以不溶性石膏（CaSO 4中心点2 H（2）O）的形式沉淀损失。然而，在硫酸浓度为
Apatite, which is used in the production of phosphorus fertilizers, contains small amounts of rare earth elements (REEs; 0.1-1%). Apatite deposits occur all over the world and thus have the potential to be a secure source of REEs. We investigated a method for recovery of REEs from an apatite sample; specifically, REEs were leached from the sample with an H2SO4 solution, the acid that is most commonly used for fertilizer production. At high H2SO4 concentrations, most of the REEs in the solution were lost to precipitation as insoluble gypsum (CaSO4 center dot 2H(2)O). However, at H2SO4 concentrations of