Potential Routes to Obtain Value-Added Iron-Containing Compounds from Red Mud
Potential Routes to Obtain Value-Added Iron-Containing Compounds from Red Mud
复制标题
从赤泥中获取增值含铁化合物的潜在途径
DOI：
10.1007/s40831-016-0112-2
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发表时间：
2017-09-01
影响因子：
2.4
通讯作者：
Rico, J. L.
中科院分区：
文献类型：
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作者：
Gu, H.;Hargreaves, J. S. J.;Rico, J. L.
以铝工业大型废弃物赤泥为前驱体，通过不同的反应途径制备高铁酸钠和铁酸钠。从赤泥中提取的草酸亚铁可用作制备这些化合物的中间体。在含次氯酸钠的氢氧化钠溶液中，草酸亚铁转化为高铁酸钠的转化率高达64%。此外，在使用1：1重量比的氧化铁（通过从红泥中提取草酸亚铁的途径制备）和过氧化钠在600 A ° C下进行固-固反应之后形成铁酸钠。与此相反，钠铁硅氧化物形成时，赤泥直接反应，遵循类似的实验程序。这些结果提出了一个有趣的替代方案，将环境不友好的废物转化为新的增值产品。据设想，高铁酸钠（VI）在废水处理方面可能会引起极大的兴趣，而铁酸钠和NawFexSiyOz可能会在开发用于储能的新材料方面引起兴趣。
Red mud, an aluminum industry large-scale waste, was used as a precursor to prepare sodium ferrate(VI) and sodium ferrite following different reaction pathways. Ferrous oxalate extracted from red mud has been used as an intermediate for the preparation of these compounds. The conversion rate to sodium ferrate(VI) from ferrous oxalate was as high as 64% in sodium hydroxide solution with sodium hypochlorite. Furthermore, sodium ferrite was formed after performing the solid-solid reaction at 600 A degrees C using a 1:1 weight ratio of iron oxide (prepared via the ferrous oxalate extraction route from red mud) and sodium peroxide. In contrast, sodium iron silicon oxides were formed when red mud was reacted directly, following similar experimental procedures. These results present an interesting alternative to convert an environmentally unfriendly waste to new value-added products. It is envisaged that sodium ferrate(VI) might be of great interest in terms of wastewater treatment, whereas sodium ferrite and NawFexSiyOz might be of interest in the development of new materials for energy storage.