利用普鲁士蓝/活性炭复合材料回收盐湖卤水中铯

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％.%Prussian blue nano-particles were coated at the surface of activated carbon (PB/AC) using homogeneous precipitation method under the aid of ultrasound,and were characterized by FE-SEM,XRD,XPS and FT-IR techniques.Lots of PB nano-particles 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 for recovering of Cs+ from the residual of salt lake brine which potassium was removed in QingHai salt lake industry Co.,Ltd.