以自制氢氧化钛和碳酸铯为原料,采用高温固相法制备了离子筛前驱体Cs2Ti6O13,用0.2mol/L盐酸对离子筛前驱体进行酸改型,得到铯离子筛。并通过XRD、SEM、TEM、N2吸附脱附等方法表征,考察了铯离子筛的形貌及吸附选择性能。结果表明,在焙烧温度为800℃、铯钛摩尔比为1:1.5条件下制得的铯离子筛呈片状型貌,分散均匀,结构稳定;对铯的饱和交换容量为311.4mg/g,5次循环吸附脱附后,铯离子筛的交换量维持在初始吸附量的79.51%以上,可以循环使用。
The ion sieve precursor Cs2Ti6O13 was prepared by high temperature solid phase method with self-made titanium hydroxide and cesium carbonate,and modified with 0.2mol/L hydrochloric acid to obtain cesium(Cs) ion sieve.The resulant product was characterized by XRD,SEM,TEM and N2 adsorption/desorption.The morphology and adsorption selectivity were investigated.The results showed that the ion sieve calcined at 800℃ and molar ratio of Cs to Ti 1:1.5 had schistose appearance,uniform dispersion and stable structure.The saturated exchange capacity of Cs was 311.4mg/g,after five cycles of adsorption and desorption,the exchange capacity of the ion sieve was maintained at more than 79.51% of the initial adsorption capacity,which could be recycled.
[1] 王威,曹耀华,高照国,等.铷、铯分离提取技术研究进展[J].矿产保护与利用,2013(4):54-58.
[2] 郭秀红,郑绵平,刘喜方,等.西藏盐湖卤水铯资源及其开发利用前景[J].盐业与化工,2008,37(3):8-13.
[3] 程建英.盐湖卤水中铯吸附剂的制备及其应用研究[D].西宁:青海大学,2013.
[4] 郑艳军.西藏盐湖稀有金属开发利用研究[D].北京:中国地质大学,2014.
[5] 张西营,山发寿,石国成,等.中国盐湖卤水主要成矿元素分布特征及其资源禀赋综合评价[J].盐湖研究,2016,24(2):1-11.
[6] Park Y,Shin W S,Choi S.Ammonium salt of heteropoly acid immobilized on mesoporous silica (SBA-15):an efficient ion exchanger for cesium ion[J].Chemical Engineering Journal,2013,220:204-213.
[7] Rogers H,Bowers J,Gates-Anderson D.An isotope dilution-precipitation process for removing radioactive cesium from wastewater[J].Journalof Hazardous Materials,2012,243:124-129.
[8] Misaelides P,Sarri S,Kantiranis N,et al.Investigation of chabazitic materials as Cs-137 sorbents from cementitious aqueous solutions[J].Microporous and Mesoporous Materials,2018,266:183-188.
[9] El-Kamash A M.Evaluation of zeolite a for the sorptive removal of Cs+ and Sr2(+) ions from aqueous solutions using batch and fixed bed column operations[J].Journalof Hazardous Materials,2008,151(2-3):432-445.
[10] Kapnisti M,Hatzidimitriou A G,Noli F,et al.Investigation of cesium uptake from aqueous solutions using new titanium phosphates ion-exchangers[J].Journalof Radioanalyticaland Nuclear Chemistry,2014,302(1):679-688.
[11] Yang H,Li H,Zhai J,et al.In situ growth of prussian blue nanocrystal within Fe3+ crosslinking PAA resin for radiocesium highly efficient and rapid separation from water[J].Chemical Engineering Journal,2015,277:40-47.
[12] 贾铭椿,杜志辉,王晓伟,等.聚丙烯腈-钛硅酸钠球形复合吸附剂对Cs+的吸附性能研究[J].原子能科学技术,2016,50(1):31-38.
[13] 于波,陈靖,宋崇立.新型除铯环境材料硅钛酸钠孔道结构化合物(Na4Ti4Si3O10)合成及结构表征[J].无机化学学报,2003,19(2):119-124.
[14] Deng H,Li Y,Huang Y,et al.An efficient composite ion exchanger of silica matrix impregnated with ammonium molybdophosphate for cesium uptake from aqueous solution[J].Chemical Engineering Journal,2016,286:25-35.
[15] Sun C,Zhang F,Wang X,et al.Facile preparation of ammonium molybdophosphate/Al-MCM-41 composite material from natural clay and its use in cesium ion adsorption[J].European Journalof Inoganic Chemistry,2015,2015(12):2125-2131.
[16] Yang H,Yu H,Sun J,et al.Facile synthesis of mesoporous magnetic AMP polyhedric composites for rapid and highly efficient separation of Cs+ from water[J].Chemical Engineering Journal,2017,317:533-543.
[17] 孙春艳,程建英,张兴儒.SBA-15负载钼磷酸铵材料的原位合成及其对Cs+的吸附性能研究[J].化工新型材料,2014,42(7):111-113.
[18] 纪志永,王妮,袁俊生,等.基于不同洗脱剂的单斜晶系钛基锂离子筛的制备及其吸附性能[J].材料导报,2016,30(24):37-41,53.
[19] 许乃才,黎四霞,曹佳佳,等.锰氧化物锂离子筛的掺杂改性及吸附性能研究[J].无机盐工业,2020,52(4):37-41.
[20] 张丽芬.偏钛酸型锂吸附剂的制备及性能研究[D].长沙:中南大学,2010.
[21] 郭文娟.新型粒状锂吸附剂制备及提锂研究[D].天津:河北工业大学,2014.
[22] Lin C,Fan X,Xin Y,et al.Monodispersed mesoporous Li4Ti5O12 submicrospheres as anode materials for lithium-ion batteries:morphology and electrochemical performances[J].Nanoscale,2014,6(12):6651-6660.
[23] 韩金玲,陈葵,武斌,等.高吸附性能介孔磁性复合碳球的制备[J].精细化工,2020,37(4):689-695,709.