利用普鲁士蓝/活性炭复合材料回收提钾后的盐湖卤水中铯

Recovery of cesium from residual salt lake brine using prussian blue functionalized activated carbon composite

中文关键词:  回收  铯  普鲁士蓝  活性炭

英文关键词:Recovery  Cesium  Prussian blue  Activated carbon

中文摘要:

      以亚铁氰化钾为单源前驱体，以活性炭为载体，采用超声辅助均匀沉淀法，制备了普鲁士蓝/活性炭复合材料（PB/AC）。通过场发射扫描电子显微镜、X-射线衍射、X-射线光电子能谱和傅立叶变换红外光谱技术，对PB/AC的形貌、结构和组成进行了表征。结果表明：立方体结构的PB微晶均匀地分布在活性炭表面。研究考察了PB/AC对水溶液中铯离子（Cs+）的吸附和脱附性能。在pH = 7、45 ℃和180 min条件下，PB/AC对Cs+的最大吸附量为49.17 mg/g；在pH = 2、45 ℃和240 min条件下，Cs+的脱附率可达88.5%。该材料被成功应用于青海盐湖工业股份有限公司提钾后的盐湖卤水中铯的回收。

英文摘要:

      Abstract：Prussian blue nano-particles were coated at the surface of activated carbon (PB/AC) using homogeneous precipitation method under an aid of ultrasound, which was characterized by FE-SEM, XRD, XPS and FT-IR techniques. Lots of PB nanoparticles were well distributed at the surface of AC with a cubic structure. The uptake of cesium (Cs+) was investigated at PB/AC in aqueous solution. The maximum adsorption capacity of Cs+ was 49.17 mg/g at pH 7, 45 ℃ and 120 min, the desorption efficiency of Cs+ could reach to 88.51% at pH 2, 45 ℃ and 240 min. PB/AC could be used to the recovery of Cs+ from the residual of salt lake brine which potassium was removed in Qinghai salt lake industry co., LTD.