TP207树脂吸附La~(3+), Ca~(2+)及La~(3+)/Ca~(2+)分离系数测定研究
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摘要
通过静态吸附和解吸试验系统研究了氯化体系中TP207树脂吸附La~(3+)和Ca~(2+)的规律,考察了吸附时间、吸附温度、吸附浓度和pH值对树脂吸附容量的影响,以及HCl浓度对负载树脂解吸率的影响,并得出了优化条件下的La~(3+)/Ca~(2+)分离系数。结果表明:在吸附时间5 h,吸附温度25℃和pH值为4.10的条件下, TP207树脂对La~(3+)和Ca~(2+)吸附容量分别为1.25和0.23 mmol·g~(-1)。在此条件下, La~(3+)/Ca~(2+)分离系数超过13,树脂循环利用20次后吸附容量下降10%,为工业生产中提La~(3+)除Ca~(2+)工艺提供了新的技术支持。
The adsorption rules of La~(3+) and Ca~(2+) by TP207 resin in chlorinated system were studied by static adsorption and desorption experiment. The effects of adsorption time, adsorption temperature, adsorption concentration and pH value on adsorption capacity of the resin, the influence of hydrochloric acid concentration on the desorption rate of the loaded resin were investigated, and the separation coefficient of La~(3+)/Ca~(2+) was obtained under the optimized conditions. The results showed that the adsorption capacities of La~(3+) and Ca~(2+) were 1.25 and 0.23 mmol·g~(-1) respectively under the conditions of adsorption time 5 h, adsorption temperature 25 ℃ and pH 4.10. Under these conditions, the separation coefficient of La~(3+)/Ca~(2+) was over 13, the adsorption capacity of resin decreased by 10% after 20 cycles, which provided a new technical support for the process of removing Ca~(2+) from La~(3+) solution in industrial production.
The adsorption rules of La~(3+) and Ca~(2+) by TP207 resin in chlorinated system were studied by static adsorption and desorption experiment. The effects of adsorption time, adsorption temperature, adsorption concentration and pH value on adsorption capacity of the resin, the influence of hydrochloric acid concentration on the desorption rate of the loaded resin were investigated, and the separation coefficient of La~(3+)/Ca~(2+) was obtained under the optimized conditions. The results showed that the adsorption capacities of La~(3+) and Ca~(2+) were 1.25 and 0.23 mmol·g~(-1) respectively under the conditions of adsorption time 5 h, adsorption temperature 25 ℃ and pH 4.10. Under these conditions, the separation coefficient of La~(3+)/Ca~(2+) was over 13, the adsorption capacity of resin decreased by 10% after 20 cycles, which provided a new technical support for the process of removing Ca~(2+) from La~(3+) solution in industrial production.
引文
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[2] 林河成. 氧化镧的生产及应用发展 [J]. 上海有色金属, 2007, 28(4): 196. Lin H C. Progress of production and application of lanthanum oxide [J]. Shanghai Nonferrous Metals, 2007, 28(4): 196.
[3] 张臻悦, 何正艳, 徐志高, 余军霞, 张越飞, 池汝安. 中国稀土矿稀土配分特征 [J]. 稀土, 2016, 7(1): 121.Zhang Z Y, He Z Y, Xu Z G, Yu J X, Zhang Y F, Chi R A. Rare earth partitioning characteristics of China rare earth ore [J]. Chinese Rare Earths, 2016, 7(1): 121.
[4] 冯宗玉, 黄小卫, 王猛, 张国成. 典型稀土资源提取分离过程的绿色化学进展及趋势 [J]. 稀有金属, 2017, 41(5): 604.Feng Z Y, Huang X W, Wang M, Zhang G C. Progress and trend of green chemistry in extraction and separation of typical rare earth resources [J]. Chinese Journal of Rare Metals, 2017, 41(5): 604.
[5] 张魁芳, 刘志强, 郭秋松, 朱薇, 曹洪杨, 李伟. 南方离子型稀土中铀和钍的放射性调查及萃取分离 [J]. 中国有色金属学报, 2017, 27(10): 2180.Zhang K F, Liu Z Q, Guo Q S, Zhu W, Cao H Y, Li W. Radioactivity survey and extraction separation of U and Th in ion-adsorption rare earth [J]. Chinese Journal of Nonferrous Metals, 2017, 27(10): 2180.
[6] 马升峰, 许延辉, 刘铃声, 申孟林, 田皓. 包头混合型稀土矿盐酸洗钙工艺研究 [J]. 稀土, 2017, 38(5): 75.Ma S F, Xu Y H, Liu L S, Shen M L, Tian H. Study on technique for calcium removal from mixed rare earth by HCI [J]. Chinese Rare Earths, 2017, 38(5): 75.
[7] 贾江涛, 廖春生, 严纯华, 曾东海, 冯余清, 周静, 田北超. 萃取法Ca/La在线分离工艺 [J]. 稀土, 1999, 20(4): 12.Jia J T, Liao C S, Yan C H, Zeng D H, Feng Y Q, Zhou J, Tian B C. On-line solvent extracting Ca from La in La/Ce separation process [J].Chinese Rare Earths, 1999, 20(4): 12.
[8] 陈朝宗, 袁有学, 魏艳玲. 荧光纯氧化镧制备的研究-N263萃取分离镧中的钙、 铅、 铁 [J]. 化学试剂, 1984, 6(1): 39.Chen C Z, Yuan Y X, Wei Y L. Study on the preparation of fluorescently pure La2O3-the removal of Ca, Pb, Fe impurities by extraction with N263 [J]. Chemical Reagents, 1984, 6(1): 39.
[9] 梁俊福, 宋崇立, 庄永能, 张伟, 朱永贝睿. 用HDEHP从氧化镧中去除放射性的工艺研究 [J]. 核科学与工程, 1989, 9(2): 151.Liang J F, Song C L, Zhuang Y N, Zhang W, Zhu Y J. The process study for the removal of radioactivity from lanthanum oxide by HDEHP in HNO3 system [J]. Chinese Journal of Nuclear Science and Engineering, 1989, 9(2): 151.
[10] Page M J, Soldenhoff K, Ogden M D. Comparative study of the application of chelating resins for rare earth recovery [J]. Hydrometallurgy, 2017, 90(1): 13.
[11] Dragan E S , Dinu M V, Lisa G , Trochimcuk A W. Study on metal complexes of chelating resins bearing iminodiacette groups [J]. Eur. Polym. J., 2009, 45(7): 2119.
[12] Park H J, Tavlarides L L. Adsorption of neodymium(III) from aqueous solutions using a phosphorus functionalized adsorbent ind [J]. Eng. Chem. Res., 2010, 49(24): 12567.
[13] 沈秋仙, 莫建军, 熊春华. 亚胺基二乙酸树脂对镧(Ⅲ)的吸附及其机制 [J]. 中国稀土学报, 2003, 21(4): 421.Shen Q X, Mo J J, Xiong C H. Adsorption behavior and mechanism of diglycolamidic acid resin for lanthanum(III) [J]. Journal of the Chinese Society of Rare Earths, 2003, 21(4): 421.
[14] Xiong C H, Wu X M. Study on the adsorption of iminodiacetic acid resin for yttrium (III) [J]. Chinese Journal of Inorganic Chemstry, 2003, 19(1): 1356.
[15] Chen C Y, Chen S Y. Adsorption properties of a chelating resin containing hydroxy group and iminodiacetic acid for copper ions [J]. J. Appl. Poly. Sci., 2004, 94(5): 2123.
[16] 杨幼明, 沈文明, 黄振华, 蓝桥发, 余攀. D001树脂静态吸附钕离子的热力学与动力学研究 [J]. 稀有金属, 2014, 38(3): 447.Yang Y M, Shen W M, Huang Z H, Lan Q F, Yu P. Thermodynamics and kinetics of static adsorption of neodymium ions with D001 ion exchange resin [J]. Chinese Journal of Rare Metals, 2014, 38(3): 447.
[17] 朱屯. 萃取与离子交换 [M]. 北京: 冶金工业出版社, 2005. 423.Zhu T. Extraction and ion exchange[M]. Beijing: Metallurgical Industry Press, 2005. 423.
[18] Didi M A. Comparative study on lanthanum(III) sorption onto Lewatit TP 207 and Lewatit TP 260 [J]. J. Radioanalytical Nuclear Chem., 2014, 299(1): 439.