Journal of ion exchange最新文献_第6页

Influences of Pore and Particle Sizes of CMPO/SiO2-P Adsorbent on Extraction Chromatography Process CMPO/SiO2-P吸附剂孔径和粒径对萃取色谱的影响

Journal of ion exchange Pub Date : 2019-01-01 DOI: 10.5182/JAIE.30.8

Sou Watanabe, Y. Sano, Shuhei Sanda, S. Sakurai, T. Arai

{"title":"Influences of Pore and Particle Sizes of CMPO/SiO2-P Adsorbent on Extraction Chromatography Process","authors":"Sou Watanabe, Y. Sano, Shuhei Sanda, S. Sakurai, T. Arai","doi":"10.5182/JAIE.30.8","DOIUrl":"https://doi.org/10.5182/JAIE.30.8","url":null,"abstract":"Extraction chromatography is promising technology for trivalent minor actinides recovery from spent nuclear fuel. In this study, CMPO-impregnated adsorbents with various pore and particle sizes of SiO 2 particles were prepared, and influences of those properties on the adsorption/elution performances were investigated by batch-wise adsorption experiments and column experiments. Only surface of the particle contributed to adsorption when the pore size is too small. In this system, adsorption/elution kinetics was favorable, whereas adsorption capacity was poor. Broadening in the pore size was revealed to enhance diffusion of mobile phase into the particle, and then elution rate was also improved. Since too large pore size might lead weak mechanical strength, refinement in the pore size considering practical operation condition might be required. Large particle showed fine adsorption performance through batch-wise experiments, but formation of channeling or voids inside the packed bed were observed in the column operation. The voids lead poor breakthrough and elution performances. The particle size had to be smaller than 200 μ m for the extraction chromatography system though large particle is desirable in the respects of remote handling and adsorption performance.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84283512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Synthesis of Fe-type Layered Double Hydroxide from Biomass Combustion Ash for Removal of Arsenite and Arsenate 生物质燃烧灰合成铁型层状双氢氧化物去除亚砷酸盐

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.60

A. Suhara, T. Wajima

{"title":"Synthesis of Fe-type Layered Double Hydroxide from Biomass Combustion Ash for Removal of Arsenite and Arsenate","authors":"A. Suhara, T. Wajima","doi":"10.5182/JAIE.29.60","DOIUrl":"https://doi.org/10.5182/JAIE.29.60","url":null,"abstract":"In Japan, biomass power generation is being promoted for effective biomass utilization. However, a major problem is the large amount of biomass combustion ash discharged and disposed of as industrial waste. Environmental problems caused by arsenic (As) occur throughout the world, including Japan. In this study, we attempted to synthesize an Fe-type layered double hydroxide (Fe-LDH) from biomass combustion ash for As removal. During this experiment, the combustion ash was added to HCl to dissolve divalent cations, Ca and Mg, in the ash, and then filtrated. Iron chloride hexahydrate (FeCl3·6H2O) was added to the filtrate to prepare an acidic liquid mixture with a molar ratio of (Ca+Mg)/Fe = 2-2.5, which was added to 0.3 M NaCl solution and stirred for 6 h to synthesize LDH at 20, 40, and 60°C maintaining a pH 8.5, 10.5, and 12.5, respectively. In addition, the As removal ability of the product was investigated. As a result, the product, including Fe-LDH, prepared from the biomass combustion ash at pH 12.5 at 40C demonstrated a strong ability to remove arsenite (As(III)) and arsenate (As(V)), and the removal percentage of As(III) using the product was higher than that of As(V).","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"267 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83001056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Synthesis and Electrochemical Properties of CoAl, NiAl, CoFe and NiFe Layered Double Hydroxide Films 煤、NiAl、CoFe和NiFe层状双氢氧化物膜的合成及其电化学性能

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.131

Guoshen Yang, T. Takei, S. Yanagida, N. Kumada

引用次数: 0

Incorporation Behavior of Cesium into Pollucite and the Optimization of Synthesis Method 铯在污染石中的掺入行为及合成方法的优化

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.136

Haruka Nobuta, Yujiro Watanabe, S. Oshima, Y. Komatsu, K. Fujinaga

{"title":"Incorporation Behavior of Cesium into Pollucite and the Optimization of Synthesis Method","authors":"Haruka Nobuta, Yujiro Watanabe, S. Oshima, Y. Komatsu, K. Fujinaga","doi":"10.5182/JAIE.29.136","DOIUrl":"https://doi.org/10.5182/JAIE.29.136","url":null,"abstract":"For removal and long term storage of radioactive cesium ion (Cs) which diffused into the environment by the Fukushima Daiichi Nuclear Power Plant accident, pollucite (POL: Cs16Si32Al16O96·nH2O) which is a cesium containing mineral was synthesized by using a solution containing sodium silicate, sodium aluminate and cesium chloride, and the optimum synthesis condition for Cs removal and insolubilization was determined. POL synthesis was carried out at 200°C for 24 h, in the Si/Al molar ratio range of 0.5 to 7.0 and in the Cs concentration range of 10 to 5000 mg dm. The product was characterized using X-ray diffractometer and scanning electron microscopy. After synthesis of POL, the concentration of Cs remained in the solution which was not incorporated into POL was determined by using atomic adsorption spectrophotometer. The Cs dissolution experiment was carried out with the synthesized product in a 0.6 M NaCl solution for 24 h. It was revealed that excellent Cs removal and insolubilization were confirmed by the formation of POL with Si/Al molar ratio of 2.0 and 2.5 in the mixed solution adjusted to 2500 mg dm Cs concentration. In addition, even in low Cs concentrations (100 mg dm), the excellent Cs removal and insolubilization were achieved with POL having Si/Al molar ratio of 2.0. Moreover, if Si/Al molar ratio was adjusted to be 2.0 to 2.5, Cs (100 mg dm to 2500 mg dm) could remove effectively and store stably long time.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83010018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

View for the Achievement Award 2017 from Japan Society of Ion Exchange 查看2017年日本离子交换学会成就奖

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.171

Yukimoto Kobayashi

引用次数: 0

Adsorptive Removal of Nitrate from Water Using Modified Activated Carbon Fibers 改性活性炭纤维吸附去除水中硝酸盐的研究

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.166

M. Machida, Y. Amamo

引用次数: 1

Adsorption and Separation of Sr(II) and Y(III) by Extraction Chromatography Using HDEHP-impregnated Adsorbent 浸渍hdehp吸附剂萃取色谱法吸附分离Sr(II)和Y(III)

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.110

Seongyun Kim, T. Ito

引用次数: 0

Development of Supramolecular and/or Metal-Complex Analytical Reagents Possessing Ion-Exchange or Molecular Recognition Function 具有离子交换或分子识别功能的超分子和/或金属络合分析试剂的开发

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.176

T. Hashimoto

引用次数: 0

Study on Separation of Platinum Group Metals from High-level Liquid Waste Using Sulfur-containing Amic Acid-functionalized Silica 含硫酸功能化二氧化硅从高放废液中分离铂族金属的研究

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.97

T. Ito, Seongyun Kim

引用次数: 3

The Effect of Solvent on the Liquid – Liquid Extraction of Lanthanides Using DODGAA as an Extractant 溶剂对以DODGAA为萃取剂萃取镧系元素液液萃取的影响

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.76

K. Fujinaga, Yuka Kobayashi, Naoto Shimizu, Shin-ichi Kawano, S. Oshima, Mune-aki Sakamoto, Y. Komatsu

{"title":"The Effect of Solvent on the Liquid – Liquid Extraction of Lanthanides Using DODGAA as an Extractant","authors":"K. Fujinaga, Yuka Kobayashi, Naoto Shimizu, Shin-ichi Kawano, S. Oshima, Mune-aki Sakamoto, Y. Komatsu","doi":"10.5182/JAIE.29.76","DOIUrl":"https://doi.org/10.5182/JAIE.29.76","url":null,"abstract":"4-Methyl-1,3-dioxolan-2-one and 4-ethyl-1,3-dioxolan-2-one are well-known solvent in the name of propylene carbonate (PC) and butylene carbonate (BC), respectively, and PC is classified to level 1 in terms of combustibility and health hazard by National Fire –Protection Association. Therefore, PC is less toxic and environment-friendly solvent compared to the usual solvents, such as hexane and toluene. PC and BC are not only safe but also are having strong polarity, however, their application to solvent extraction of metal chelates as an extraction solvent were not carried out so much. Then, in this study, PC and BC were applied to N,N-dioctyldiglycolamic acid (DODGAA) extraction of lanthanides as the diluent and their extractabilities were compared with that of hexane. Lanthanum and scandium were found to be affected with solvent comparatively strongly to the other lanthanides. It was observed in the slope analysis of in the relationship between log D vs. pH plots that the some slopes of straight lines in DODGAA-PC and DODGAA-BC system deviated from theoretical value of 3. The possibilities of the change of metal ion concentration based on the volume change due to the mutual dissolution and the formation of different kind of complex other than LnR3 were considered as the causes for the deviations in a slope analysis and were examined experimentally.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84607553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1