Sorption of alkaline and alkaline-earth radionuclides on zirconium phosphate sorbent Termoxid-3A from aqueous solutions

Kremlyakova, N.Yu.; Komarevsky, V. M.

doi:10.1007/bf02039334

Cited by 11 publications

(10 citation statements)

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“…Another impregnate was prepared at the V I Vernadsky Institute of Geochemistry (Russia) by impregnation of a porous copolymer of styrene and divinylbenzene with a 10% solution of DCH-18-C-6 (12) in chloroform or tetrachloroethane. 2,45 Nazarenko et al 46 described a method of synthesis of crowncontaining sorbents by coprecipitation of 18-crown-6 and phosphomolybdic heteropolyacid. These authors 46 also studied the influence of sorbent composition and medium acidity on the sorption properties with respect to rare-earth elements of the cerium group.…”

Section: Methods For Immobilisation Of Crown Ethersmentioning

confidence: 99%

Section: B Methods For Increasing Extraction Efficiency and Nonconven...mentioning

confidence: 99%

“…Extraction-chromatographic and extraction methods were proposed 45,174,175 for rapid quantitation of radioactive strontium in water, soil and agricultural products. An impregnate containing a 10% solution of DCH-18-C-6 (12) was used as the sorbent, 45 while the extraction system was composed of 10% solution of the crown ether 12 in chloroform. 174,175 The analytical procedure involved drying of the sample, its calcination at 500 ± 600 8C for several hours and subsequent treatment of the ash with HNO 3 or HCl.…”

Section: B Methods For Increasing Extraction Efficiency and Nonconven...mentioning

confidence: 99%

“…In this method, analysis of a sample after its pretreatment required no more than 30 ± 50 min, the chemical yield was > 95% with the product purity > 98%. 45 A rapid method for the quantitation of Sr in milk was developed. 176 Milk was treated with a chelate-forming resin, Sr was eluted with a dilute nitric acid, separated from Ca by extraction of the eluate with DCH-18-C-6 (12) in chloroform with subsequent transfer of Sr to the aqueous solution and removal of Ba by extraction with a solution of 21-C-7 in dichloromethane.…”

Section: B Methods For Increasing Extraction Efficiency and Nonconven...mentioning

confidence: 99%

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Crown ethers in radiochemistry. Advances and prospects

Нестеров¹

2000

Russ. Chem. Rev.

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Methods for the immobilisation of dicyclohexano-and Methods for the immobilisation of dicyclohexano-and non-substituted crown ethers are reviewed. Data on the radiation non-substituted crown ethers are reviewed. Data on the radiation chemistry of these compounds and on the influence of irradiation chemistry of these compounds and on the influence of irradiation on the properties of crown-containing extraction systems pub-on the properties of crown-containing extraction systems published over the last decade are discussed systematically. Examples lished over the last decade are discussed systematically. Examples of the use of crown ethers in different fields of radiochemistry are of the use of crown ethers in different fields of radiochemistry are presented. The bibliography includes 199 references presented. The bibliography includes 199 references. .

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Section: Methods For Immobilisation Of Crown Ethersmentioning

confidence: 99%

Section: B Methods For Increasing Extraction Efficiency and Nonconven...mentioning

confidence: 99%

Section: B Methods For Increasing Extraction Efficiency and Nonconven...mentioning

confidence: 99%

Section: B Methods For Increasing Extraction Efficiency and Nonconven...mentioning

confidence: 99%

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Crown ethers in radiochemistry. Advances and prospects

Нестеров¹

2000

Russ. Chem. Rev.

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“…Previous researches have shown its potential ap-plications in many fields. ZP is an important ion exchanger, [5][6][7][8][9] solid acid catalyst [13][14][15][16][17][18][19][20] with high water tolerance ability and easy sedimentation 13,14 which also was used in nuclear waste management, [9][10][11] drug delivery [21][22][23][24] and immobilization of biological materials. [25][26][27][28][29] Recently, much attention has been focused on the development of new preparation methods to produce different ZP nano compounds such as nanoparticles, 14,15,18,30 nanoplates 2,24 and nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Zirconium Phosphate Nanoparticles for Solvent Free Acetylation of Phenols and Salicylic Acid: An Efficient and Eco‐friendly Solid Acid Catalyst for Synthesis of Acetyl Salicylic Acid (Aspirin)

Hajipour

Karimi

2014

J Chinese Chemical Soc

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A facile synthesis of zirconium phosphate (ZP) nanoparticles as an effective, eco‐friendly and recyclable solid acid catalyst were studied. PVA was used as the organic matrix which is the dispersing agent and acted as a template for the nanoparticle. It seems H‐bonds between ZP and PVA along polymer chains play an important role in the better dispersion of in situ formed ZP. The catalyst was characterized by several instrumental techniques such as BET, ICP‐OES, XRD, FT‐IR, SEM and TEM. The TPD‐NH3 analysis suggests the presence of reasonable amount of Brönsted acid sites. The acidic properties of catalyst were studied in acetylation of phenols by acetic anhydride (AA), specifically synthesis of acetylsalicylic acid (ASA), commonly known as Aspirin, from salicylic acid (SA). The effects of reaction time, reaction temperature, mole ratio of reactants, as well as amount of catalysts on the synthesis of ASA were investigated, and the reaction conditions were therefore optimized. The excellent yield (96%) of the ASA was obtained under optimized reaction conditions. The catalyst was recovered from reaction media and reused for 4 times after that with a consistent high yield.

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