Recovery of nano-calcium fluoride and ammonium bisulphate from phosphogypsum waste

被引：18
作者：
Ennaciri Y. [1 ]
Bettach M. [1 ]
El Alaoui-Belghiti H. [1 ]
机构：
[1] Laboratory of Physical Chemistry of Materials (LPCM), Faculty of Sciences, Chouaib Doukkali University, El Jadida
来源：
Int. J. Environ. Stud. | 2020年 / 2卷 / 297-306期
关键词：
ammonium bisulphate; calcium fluoride; Conversion; phosphogypsum;
D O I：
10.1080/00207233.2020.1737426
中图分类号：
学科分类号：
摘要：
The production of phosphoric acid generates an enormous amount of phosphogypsum with emission of toxic fluorine acid gas. To remedy these environmental problems, a novel and a simple procedure permits converting phosphogypsum waste by recycled fluorine acid into valuable products. The obtained results confirm the efficiency of this procedure, which synthesises at room temperature the calcium fluoride in the form of nano-crystalline powder and the ammonium bisulphate salt from the exact stoichiometric proportions of phosphogypsum, hydrofluoric acid and ammonia. The total conversion of phosphogypsum is achieved after reaction time equal to one hour and a half. Generally, this novel procedure offers not only a solution for reducing phosphogypsum waste and fluorine gas emission, but also gives rise to valuable products, useful to industry and agriculture. © 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.
引用
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页码：297 / 306
页数：9
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