SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal Ions
A macroporous silica-based 4,4′,(5′)-di(t-butylcyclohexano)-18-crown-6 (DtBuCH18C6)-impregnated polymeric composite, (DtBuCH18C6 + Oct)/SiO 2 -P, was synthesized by molecular modification of DtBuCH18C6 with 1-octanol through hydrogen bonding. This was achieved by impregnating and immobilizing DtBuCH...
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SAGE Publishing
2008-11-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361708788251358 |
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| author | Anyun Zhang Chunmei Chen Zhifang Chai Mikio Kumagai |
| author_facet | Anyun Zhang Chunmei Chen Zhifang Chai Mikio Kumagai |
| author_sort | Anyun Zhang |
| collection | DOAJ |
| description | A macroporous silica-based 4,4′,(5′)-di(t-butylcyclohexano)-18-crown-6 (DtBuCH18C6)-impregnated polymeric composite, (DtBuCH18C6 + Oct)/SiO 2 -P, was synthesized by molecular modification of DtBuCH18C6 with 1-octanol through hydrogen bonding. This was achieved by impregnating and immobilizing DtBuCH18C6 and 1-octanol molecules in the pores of macroporous SiO 2 -P particles possessing a mean pore diameter of 50 μm. The adsorption of some fission and non-fission products contained in highly active liquid waste (HLW) such as Ru(III), Mo(VI), Pd(II), Na(I), K(I), Cs(I), Sr(II), Ba(II), La(III) and Y(III) onto (DtBuCH18C6 + Oct)/SiO 2 -P was investigated at 298 K. The effects of contact time and HNO 3 concentration within the range 0.1–5.0 M were examined. Increasing the HNO 3 concentration from 0.1 M to 2.0 M led to a significant increase in the adsorption of Sr(II), followed by a decrease when the HNO 3 concentration was increased further to 5.0 M. The optimum concentration of HNO 3 in the adsorption of Sr(II) onto (DtBuCH18C6 + Oct)/SiO 2 -P was determined as 2.0 M. For the other ions examined with the exception of Ba(II), very weak or almost non-existent adsorption capacities were observed at all HNO 3 concentrations. The leaching of total organic carbon (TOC) from (DtBuCH18C6 + Oct)/SiO 2 -P into the aqueous phase was evaluated. Over the HNO 3 concentration range 0.1–3.0 M, the quantity of TOC leached was ca. 40 ppm compared with 355.8–373.3 ppm at HNO 3 concentrations above 4.0 M. Significant reduction of TOC leaching from the macroporous silica-based DtBuCH18C6-impregnated polymeric composite was achieved in 2.0 M HNO 3 . Such behaviour could be of great benefit in using (DtBuCH18C6 + Oct)/SiO 2 -P for the partitioning of Sr(II) from HLW by extraction chromatography. |
| format | Article |
| id | doaj-art-9b3b596e050d43ce8574ce0c65922d48 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2008-11-01 |
| publisher | SAGE Publishing |
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| series | Adsorption Science & Technology |
| spelling | doaj-art-9b3b596e050d43ce8574ce0c65922d482025-01-03T00:10:30ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382008-11-012610.1260/026361708788251358SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal IonsAnyun Zhang0Chunmei Chen1Zhifang Chai2Mikio Kumagai3 College of Materials Science and Chemical Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China College of Materials Science and Chemical Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China College of Materials Science and Chemical Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China Nuclear Chemistry and Chemical Engineering Center, Institute of Research and Innovation, 1201 Takada, Kashiwa, Chiba 277-0861, JapanA macroporous silica-based 4,4′,(5′)-di(t-butylcyclohexano)-18-crown-6 (DtBuCH18C6)-impregnated polymeric composite, (DtBuCH18C6 + Oct)/SiO 2 -P, was synthesized by molecular modification of DtBuCH18C6 with 1-octanol through hydrogen bonding. This was achieved by impregnating and immobilizing DtBuCH18C6 and 1-octanol molecules in the pores of macroporous SiO 2 -P particles possessing a mean pore diameter of 50 μm. The adsorption of some fission and non-fission products contained in highly active liquid waste (HLW) such as Ru(III), Mo(VI), Pd(II), Na(I), K(I), Cs(I), Sr(II), Ba(II), La(III) and Y(III) onto (DtBuCH18C6 + Oct)/SiO 2 -P was investigated at 298 K. The effects of contact time and HNO 3 concentration within the range 0.1–5.0 M were examined. Increasing the HNO 3 concentration from 0.1 M to 2.0 M led to a significant increase in the adsorption of Sr(II), followed by a decrease when the HNO 3 concentration was increased further to 5.0 M. The optimum concentration of HNO 3 in the adsorption of Sr(II) onto (DtBuCH18C6 + Oct)/SiO 2 -P was determined as 2.0 M. For the other ions examined with the exception of Ba(II), very weak or almost non-existent adsorption capacities were observed at all HNO 3 concentrations. The leaching of total organic carbon (TOC) from (DtBuCH18C6 + Oct)/SiO 2 -P into the aqueous phase was evaluated. Over the HNO 3 concentration range 0.1–3.0 M, the quantity of TOC leached was ca. 40 ppm compared with 355.8–373.3 ppm at HNO 3 concentrations above 4.0 M. Significant reduction of TOC leaching from the macroporous silica-based DtBuCH18C6-impregnated polymeric composite was achieved in 2.0 M HNO 3 . Such behaviour could be of great benefit in using (DtBuCH18C6 + Oct)/SiO 2 -P for the partitioning of Sr(II) from HLW by extraction chromatography.https://doi.org/10.1260/026361708788251358 |
| spellingShingle | Anyun Zhang Chunmei Chen Zhifang Chai Mikio Kumagai SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal Ions Adsorption Science & Technology |
| title | SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal Ions |
| title_full | SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal Ions |
| title_fullStr | SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal Ions |
| title_full_unstemmed | SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal Ions |
| title_short | SPEC Process III. Synthesis of a Macroporous Silica-Based Crown Ether-Impregnated Polymeric Composite Modified with 1-Octanol and its Adsorption Capacity for Sr(II) Ions and Some Typical Co-Existent Metal Ions |
| title_sort | spec process iii synthesis of a macroporous silica based crown ether impregnated polymeric composite modified with 1 octanol and its adsorption capacity for sr ii ions and some typical co existent metal ions |
| url | https://doi.org/10.1260/026361708788251358 |
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