利用普鲁士蓝/活性炭复合材料回收盐湖卤水中铯
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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 Qing Hai salt lake industry Co.,Ltd.
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 Qing Hai salt lake industry Co.,Ltd.
引文
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[2]闫明,钟辉,张艳.卤水中分离提取铷、铯的研究进展[J].盐湖研究,2006,14(3):67-72.
[3]Liu S M,Liu H H,Huang Y J,et al.Solvent extraction of rubidium and cesium from salt lake brine with t-BAMBPkerosene solution[J].Transactions of Nonferrous Metals Society of China,2015,25(1):329-334.
[4]Han F,Gu P,Zhang G.Research progress in the cesium removal from radioactive liquid waste[J].Industrial Water Treatment,2012,32(1):10-14.
[5]Li R D,Zhang Z H,Li A,Wang L.The research progress of strontium and cesium adsorption with inorganic ion exchange material[J].Northern Environment,2010,77-81.
[6]Takashi U,Masaaki O,Susumu K.Size and Surface Effects of Prussian Blue Nanoparticles Protected by Organic Polymers[J].Inorganic Chemistry,2004,43(23):7339-7345.
[7]Acharya J,Sahu J N,Sahoo B K,et al.Removal of chromium(VI)from wastewater by activated carbon developed from Tamarind wood activated with zinc chloride[J].Chemical Engineering Journal,2009,150(1):25-39.
[8]Kubota T,Fukutani S,Ohta T,et al.Removal of radioactive cesium,strontium,and iodine from natural waters using bentonite,zeolite,and activated carbon[J].Journal of Radioanalytical&Nuclear Chemistry,2013,296(2):981-984.
[9]Niemczewski B.Chemical activation of ultrasonic cavitation[J].Ultrasonics Sonochemistry,1999,6(4):211-216.
[10]Vipin A K,Hu B,Fugetsu B.Prussian blue caged in alginate/calcium beads as adsorbents for removal of cesium ions from contaminated water[J].Journal of Hazardous Materials,2013,258-259(6):93-101.
[11]Yang H,Li H,Zhai J,et al.Magnetic prussian blue/graphene oxide nanocomposites caged in calcium alginate microbeads for elimination of cesium ions from water and soil[J].Chemical Engineering Journal,2014,246(16):10-19.
[12]Celebi O,Kilikli A,Erten H N.Sorption of radioactive cesium and barium ions onto solid humic acid[J].Journal of Hazardous Materials,2009,168(2-3):695-703.
[13]Jin G P,Zhu X H,Li C Y,et al.Tetraoxalyl ethylenediamine melamine resin functionalized coconut active charcoal for adsorptive removal of Ni(II),Pb(II)and Cd(II)from their aqueous solution[J].Journal of Environmental Chemical Engineering,2013,1(4):736-745.
[14]Awual M R,Suzuki S,Taguchi T,et al.Radioactive cesium removal from nuclear wastewater by novel inorganic and conjugate adsorbents[J].Chemical Engineering Journal,2014,242(15):127-135.
[15]Lin L,Huang X,Wang L,et al.Synthesis,characterization and the electrocatalytic application of prussian blue/titanate nanotubes nanocomposite[J].Solid State Sciences,2010,12(10):1764-1769.