As a kind of rare metals,rubidium is often used to prepare special glass,photomultiplier tubes,thermoelectric converter,organic catalysts and antidepressants.Rubidium forms no minerals of its own,hence,it often coexis...As a kind of rare metals,rubidium is often used to prepare special glass,photomultiplier tubes,thermoelectric converter,organic catalysts and antidepressants.Rubidium forms no minerals of its own,hence,it often coexists with展开更多
In this paper, a new complex inorganic ion exchanger Titanium Phosphate - Ammonium Tungstophosphate (abbreviated as TiP - AWP) was synthesized, whose exchange character and chemical structure were studied, Thiscompoun...In this paper, a new complex inorganic ion exchanger Titanium Phosphate - Ammonium Tungstophosphate (abbreviated as TiP - AWP) was synthesized, whose exchange character and chemical structure were studied, Thiscompound exhibits high exchange capacity and selectivity for Cs+, its exchangecapacity attains 0. 95 mmol/g in the medium of 0. 1 mol/L HNO3, andwhich almost doesn’ t change in the 1 AW imitated waste solution. There areno change in exchange capacity and structure after several times of exchanging,eluting, regenerating, which is of great importance to the separation and uptaking of radio - nuclides. Further more, this exchanger has good thermal andradioactive stability.展开更多
A functional microcapsule was prepared by encapsulating the fine crystalline ammonium tungstophosphate （AWP） in calcium alginate polymer （CaALG）. The characterization of AWP-CaALG microcapsule was examined by SEM ...A functional microcapsule was prepared by encapsulating the fine crystalline ammonium tungstophosphate （AWP） in calcium alginate polymer （CaALG）. The characterization of AWP-CaALG microcapsule was examined by SEM and EPMA. The ad- sorption behavior of Cs（Ⅰ）, Rb（Ⅰ）, Sr（Ⅱ）, Pd（II）, Ru（Ⅲ）, Rh（Ⅲ）, La（Ⅲ）, Ce（Ⅲ）, Dy（Ⅲ） and Zr（IV） was investigated by the batch method. The batch experiments were carried out by varying the shaking times, HNO3 concentration, and initial concen- tration of metal ions. Relatively large K＋ values above 105 cm3/g for Cs（I） were obtained in the range of 0.1-5 M HNO3, re- sulting in a separation factor of Cs/Rb exceeding 102. In contrast, the K＋ values of Sr（II）, Pd（II）, Ru（Ⅲ）, La（Ⅲ）, Dy（Ⅲ）, Ce（Ⅲ） and Zr（IV） were considerably lower than 50 cm3/g. The K＋ value of Cs（1） decreased in the order of the coexisting ions, H＋ 〉 Na＋ 〉〉 NH4＋, and a linear relationship with a slop of about -1 was obtained between log Kd and log [NH4＋] （[NH4＋] 〉 0.01 M） The adsorption of Cs（I） was found to be controlled by chemisorption mechanism, and followed a Langmuir-type adsorption equation. A high uptake percentage of 99.4% for Cs（I） was obtained by using the dissolved solutions of spent fuel from FBR-JOYO （JAEA）.展开更多
基金financially supported by the National High Technology Research and Development Program of China (2012AA061704)
文摘As a kind of rare metals,rubidium is often used to prepare special glass,photomultiplier tubes,thermoelectric converter,organic catalysts and antidepressants.Rubidium forms no minerals of its own,hence,it often coexists with
文摘In this paper, a new complex inorganic ion exchanger Titanium Phosphate - Ammonium Tungstophosphate (abbreviated as TiP - AWP) was synthesized, whose exchange character and chemical structure were studied, Thiscompound exhibits high exchange capacity and selectivity for Cs+, its exchangecapacity attains 0. 95 mmol/g in the medium of 0. 1 mol/L HNO3, andwhich almost doesn’ t change in the 1 AW imitated waste solution. There areno change in exchange capacity and structure after several times of exchanging,eluting, regenerating, which is of great importance to the separation and uptaking of radio - nuclides. Further more, this exchanger has good thermal andradioactive stability.
文摘A functional microcapsule was prepared by encapsulating the fine crystalline ammonium tungstophosphate （AWP） in calcium alginate polymer （CaALG）. The characterization of AWP-CaALG microcapsule was examined by SEM and EPMA. The ad- sorption behavior of Cs（Ⅰ）, Rb（Ⅰ）, Sr（Ⅱ）, Pd（II）, Ru（Ⅲ）, Rh（Ⅲ）, La（Ⅲ）, Ce（Ⅲ）, Dy（Ⅲ） and Zr（IV） was investigated by the batch method. The batch experiments were carried out by varying the shaking times, HNO3 concentration, and initial concen- tration of metal ions. Relatively large K＋ values above 105 cm3/g for Cs（I） were obtained in the range of 0.1-5 M HNO3, re- sulting in a separation factor of Cs/Rb exceeding 102. In contrast, the K＋ values of Sr（II）, Pd（II）, Ru（Ⅲ）, La（Ⅲ）, Dy（Ⅲ）, Ce（Ⅲ） and Zr（IV） were considerably lower than 50 cm3/g. The K＋ value of Cs（1） decreased in the order of the coexisting ions, H＋ 〉 Na＋ 〉〉 NH4＋, and a linear relationship with a slop of about -1 was obtained between log Kd and log [NH4＋] （[NH4＋] 〉 0.01 M） The adsorption of Cs（I） was found to be controlled by chemisorption mechanism, and followed a Langmuir-type adsorption equation. A high uptake percentage of 99.4% for Cs（I） was obtained by using the dissolved solutions of spent fuel from FBR-JOYO （JAEA）.
