SPEC: A New Process for Strontium and Cesium Partitioning Utilizing Two Macroporous Silica-Based Supramolecular Recognition Agents Impregnated Polymeric Composites

Zhang, Anyun; Hu, Qihui; Chai, Zhifang

doi:10.1080/01496390902885239

Cited by 43 publications

(23 citation statements)

References 19 publications

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“…The preliminary studies indicated that in 4.0 M HNO 3 , it had highly specific adsorption ability and special selectivity for Cs(I). So, it is promising for the use of (Calix [4]arene-R14/ SiO 2 -P) in the extraction chromatographic partitioning of Cs(I) in the SPEC process [35] . More detailed investigations are carried out.…”

Section: Contact Time Minmentioning

confidence: 99%

Adsorption Behavior of Sr(II) and some Typical Co‐existent Metals Contained in High Level Liquid Waste onto a Modified Macroporous Silica‐Based Polymeric DtBuCH18C6 Composite

Zhang¹,

Chen²,

Wang³

et al. 2008

Solvent Extraction and Ion Exchange

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To significantly reduce the bleeding of 4,49,(59)-di(tert-butylcyclohexano)-18-crown-6 (DtBuCH18C6), an improved novel macroporous silica-based polymeric composite (DtBuCH18C6+TBP)/SiO 2 -P was synthesized. It was performed by impregnating and immobilizing DtBuCH18C6 into the pores of the SiO 2 -P particles via the molecular modification of DtBuCH18C6 with a trin-butyl phosphate (TBP) through hydrogen bonding. The adsorption of a few typical simulated fission and non-fission products Pd(II), La(III), Na(I), K(I), Sr(II), Ba(II), Ru(III), Cs(I), Mo(VI), and Y(III) onto (DtBuCH18C6+TBP)/ SiO 2 -P was investigated at 323 K. It was done by examining the effect of contact time and the HNO 3 concentration in a range of 0.1-5.0 M. Sr(II), one of the main heat emitting nuclides, showed optimum adsorption onto (DtBuCH18C6+TBP)/SiO 2 -P in 2.0 HNO 3 , while others showed very weak or almost no adsorption except a portion of Ba(II). The leaching of TBP and DtBuCH18C6 from (DtBuCH18C6+TBP)/SiO 2 -P was evaluated. The average content of DtBuCH18C6, 298.7 ppm, leached from (DtBuCH18C6+TBP)/ SiO 2 -P in 2.0 M HNO 3 at 323 K was obviously lower than that of 797.3 ppm leached from DtBuCH18C6/SiO 2 -P at 298 K. The significant reduction of DtBuCH18C6 leaching from its macroporous silica-based polymeric adsorbent was achieved. It is useful for the recycle operation of the silica-based 624 DtBuCH18C6 impregnated polymeric composite in chromatographic partitioning of Sr(II) from high level liquid waste (HLLW).

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Section: Contact Time Minmentioning

confidence: 99%

Adsorption Behavior of Sr(II) and some Typical Co‐existent Metals Contained in High Level Liquid Waste onto a Modified Macroporous Silica‐Based Polymeric DtBuCH18C6 Composite

Zhang¹,

Chen²,

Wang³

et al. 2008

Solvent Extraction and Ion Exchange

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“…It was prepared by the impregnation and immobilization of some derivatives of calix [4]crown agents into the pores of the macroporous SiO 2 -P particles via the molecular modification techniques [19]. Following evaluation of the adsorption and column chromatographic separation properties of SSRMs, the partitioning technologies, the so-called SPEC (Strontium/Cesium Partitioning from HLW by Extraction Chromatography) process, has been proposed [20]. The heat generators, Cs(I) and Sr(II), were separated utilizing two macroporous SSRMs, Calix [4] arene-mono-crown/SiO 2 -P and 4,4 ,(5 )-di(tert-butylcyclohexano)-18-crown-6 (DtBuCH18C6)/SiO 2 -P [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Extraction behavior of cesium and some typical fission and non-fission products with a new 1,3-di(1-decyloxy)-2,4-crown-6-calix[4]arene

Zhang

Dai

et al. 2014

Radiochimica Acta

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A new macrocyclic supramolecular recognition agent, 1,3-di(1-decyloxy)-2,4-crown-6-calix[4]arene (DecylCalix[4]C6), was synthesized by a multistep reaction through separation and purification by column chromatography packed with silica gel. The extraction behavior of some representative fission and non-fission products such as La(III), Y(III), Cs(I), Rb(I), Pd(II), Mo(VI), Zr(IV), Sr(II), Ba(II), Ru(III), Na(I), and K(I), which were contained in highly active liquid waste (HLW), with DecylCalix[4]C6/1-octanol in HNO 3 medium was investigated, in particular by examining the impact of contact time, the HNO 3 concentration in the range of 0.4 to 5.0 M, and the temperature. DecylCalix[4]C6 showed excellent extraction ability and high selectivity for Cs(I) over the tested metals except for Rb(I). It was attributed to the effective recognition and complxation of DecylCalix[4]C6 for Cs(I). The optimum HNO 3 concentration for the Cs(I) extraction was 3.0 M. The composition of the extracted species of Cs(I) with DecylCalix[4]C6 was determined to be (CsDecylCalix [4]C6)NO 3 . It is valuable for the effective partitioning of Cs(I) from highly active liquid waste with DecylCalix[4]C6 by liquid-liquid solvent extraction.

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“…1 has been developed [20]. It was specially used to separate and recover both Cs(I) and Sr(II) by two adsorption columns.…”

Section: Introductionmentioning

confidence: 99%

SPEC: A New Process for Strontium and Cesium Partitioning Utilizing Two Macroporous Silica-Based Supramolecular Recognition Agents Impregnated Polymeric Composites

Cited by 43 publications

References 19 publications

Adsorption Behavior of Sr(II) and some Typical Co‐existent Metals Contained in High Level Liquid Waste onto a Modified Macroporous Silica‐Based Polymeric DtBuCH18C6 Composite

Adsorption Behavior of Sr(II) and some Typical Co‐existent Metals Contained in High Level Liquid Waste onto a Modified Macroporous Silica‐Based Polymeric DtBuCH18C6 Composite

Extraction behavior of cesium and some typical fission and non-fission products with a new 1,3-di(1-decyloxy)-2,4-crown-6-calix[4]arene

Adsorption of cesium and some typical coexistent elements onto a modified macroporous silica-based supramolecular recognition material

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