Journal of ion exchange最新文献_第7页

The Inhibition of Fluoride Elution from Industrial Wastes with Portland Cement, Calcium and Magnesium Salts in Alkaline Region 硅酸盐水泥、钙镁盐对碱性地区工业废水中氟的抑制作用

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.140

Xiaoxu Kuang, A. Sasaki, M. Endo

{"title":"The Inhibition of Fluoride Elution from Industrial Wastes with Portland Cement, Calcium and Magnesium Salts in Alkaline Region","authors":"Xiaoxu Kuang, A. Sasaki, M. Endo","doi":"10.5182/JAIE.29.140","DOIUrl":"https://doi.org/10.5182/JAIE.29.140","url":null,"abstract":"Recycling of fluoride industrial wastes is difficult to dispose, since the fluoride ions eluted again easily. In this study, newly effective inhibition method in both neutral and alkaline region for fluoride elution was investigated. Fluoride elution concentration from CaF2 was 9.8 mg/L at pH 8.1 and 288.5 mg/L at pH 12.2 with water/solid ratio of 10. Additions of Ca(OH)2, CaCl2 and NH4H2PO4 could restrain fluoride elution concentration of CaF2 to 0.22 mg/L in the neutral region. This inhibition of fluoride elution was due to a generation of hydroxyapatite (HAp) or chlorapatite (ClAp) which has high ion exchange capacity. Additions of Portland cement, Ca(OH)2 and MgCl2 could restrain fluoride elution concentration of CaF2 to 0.47 mg/L in alkaline region. It was only 0.16% of 288.5mg/L which was the fluoride elution concentration from CaF2 at pH 12.2. The elution of fluoride ions was restrained by the coprecipitating of CaF2 with the high content of Ca 2+ provided from Ca(OH)2 and cement hydrates. The carbonation of Ca 2+ was prevented by the addition of Mg. Moreover, the forming of ettringite with a high ion-exchange capacity and the solidification effect of Ca-bearing hydrates contributed to the inhibition of the elution of fluoride. These additives for the practical industrial wastes, such as paper sludge and coal ash, with high concentration of fluoride were conducted. The result indicates that the fluoride elution could be restrained to meet the environmental standard (0.8 mg/L) in Japan in alkaline region. This inhibition method for fluoride elution would be able to contribute to promotion of recycling of fluoride industrial wastes.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82665530","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

Design of Saccharide Recognition Material Based on Boronic Acid Fluorophore/Cyclodextrin Gel 基于硼酸荧光团/环糊精凝胶的糖类识别材料设计

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.126

Suzuka Soma, Takahito Suzuki, Tewodros Bekele, Yuji Tsuchido, T. Hashimoto, T. Hayashita

引用次数: 3

Study for the Formation of Sponge-like Ion Exchanger Containing Sodium-form Synthetic Mica and Its Cesium Adsorption Characteristics 含钠型合成云母海绵状离子交换剂的形成及其对铯的吸附特性研究

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.195

N. Suzuki, Kaori Suzuki, S. Karasawa

引用次数: 0

Hybridization of Metal Nanoparticle of ZnAl Layered Double Hydroxide and its Application for Photocatalyst Phenol Degradation ZnAl层状双氢氧化物金属纳米粒子的杂化及其在光催化苯酚降解中的应用

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.48

P. Lestari, T. Takei, S. Yanagida, N. Kumada

引用次数: 2

Adsorption of Rare-Earth Metal Ions on Natural Banana Fiber 天然香蕉纤维对稀土金属离子的吸附研究

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.116

T. Kajiyama, Kensuke Arai, Satoshi Ohmuro, T. Maruyama, Chika Shimose, Satomi Makino, Shuhei Takase, H. Kokusen

引用次数: 0

Design and Function of Fluorescent Silica Nanoparticles for Bacteria Detection 荧光二氧化硅纳米颗粒细菌检测的设计与功能

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.121

A. Kitamura, Y. Kasai, Yuji Tsuchido, T. Hashimoto, T. Hayashita

引用次数: 4

Oxidative Adsorption of Arsenic by N-Methylglucamine-modified Chelate Fiber and Manganese Dioxide n -甲基氨基葡萄糖修饰螯合纤维与二氧化锰氧化吸附砷的研究

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.163

Atsushi Kuraoka, Toshiyuki Umebayashi, S. Nishihama, K. Yoshizuka

引用次数: 0

Selective Sc Recovery from Rare Earths in Nitric Acid Medium by Extraction Chromatography 萃取色谱法在硝酸介质中选择性回收稀土中的钪

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.71

Sou Watanabe, Hideya Suzuki, I. Goto, H. Kofuji, T. Matsumura

{"title":"Selective Sc Recovery from Rare Earths in Nitric Acid Medium by Extraction Chromatography","authors":"Sou Watanabe, Hideya Suzuki, I. Goto, H. Kofuji, T. Matsumura","doi":"10.5182/JAIE.29.71","DOIUrl":"https://doi.org/10.5182/JAIE.29.71","url":null,"abstract":"Chemical compounds containing scandium (Sc) are widely applied to various fields such as catalysts, alloys, lamps and etc. Sc is found in mineral ore, and it is necessary to develop efficient Sc separation and recovery technology for the industrial applications. N,N,N’,N’,N’’,N’’-hexaoctylnitrilotriacetamide (HONTA) extractant has been shown to be promising for selective Sc extraction. In this study, applicability of the extraction chromatography technology using HONTA impregnated adsorbent for the selective Sc recovery from other rare earth elements (REs) was experimentally evaluated through batch-wise adsorption/elution studies and column separation experiments. Batch-wise experiments showed that distribution coefficient of Sc onto the HONTA/SiO2-P adsorbent was far larger than those of other REs at acidity region with 0.001 < [HNO3] < 4 mol dm -3 and that the adsorbed Sc was efficiently eluted into 1 M H2SO4 solution. Appropriate experimental conditions for the column separation experiment were proposed based on those results, and performance of the flow-sheet was examined for laboratory scale column system. Only Sc in 4 mol dm HNO3 solution was adsorbed into a packed column with the adsorbent while other REs were discharged from the column with the feed solution, and then loaded Sc was properly eluted into 1 M H2SO4 solution. Purity of the Sc product solution obtained by the column separation experiment depended on Sc recovery ratio, and about 99.9 % purity was achieved with 97 % recovery ratio. The residual Sc was eluted from the column with other REs and did not remain inside the column, therefore repeated used of the column was shown to be possible. This process was shown to be promising for selective Sc recovery from mixture of REs in nitric acid.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84235803","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: 3

Prolongation Technology of Life Time of Ion Exchange Resins in Nuclear Power Plants 核电站离子交换树脂寿命延长技术研究

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.188

T. Izumi, Komatsu Makoto, Deguchi Tatsuya

引用次数: 1

Preparation of Highly Selective Phosphorus Adsorbent from Zircon Sand (ZrSiO4) by Mechanochemical Treatment 机械化学处理锆英砂(ZrSiO4)制备高选择性磷吸附剂

Journal of ion exchange Pub Date : 2018-09-20 DOI: 10.5182/JAIE.29.158

K. Hirota, T. Wajima

{"title":"Preparation of Highly Selective Phosphorus Adsorbent from Zircon Sand (ZrSiO4) by Mechanochemical Treatment","authors":"K. Hirota, T. Wajima","doi":"10.5182/JAIE.29.158","DOIUrl":"https://doi.org/10.5182/JAIE.29.158","url":null,"abstract":"In this study, it is attempted to prepare the adsorbent with highly selective phosphorus adsorption material from zircon sand by a simple mechanochemical treatment. The phosphorus adsorption property of the products obtained under various mechanochemical treatment conditions were investigated by various phosphorus adsorption experiments. With increasing the time of mechanochemical treatment, the phosphorus adsorption amount of the product increased within 10 min, regardless the ball diameter. The phosphorus adsorption amount of the product was about 2.5 times larger than that of the raw zircon sand. The adsorption amount of phosphorus increased with decreasing the pH value at the equilibrium, and was about 3.5 times larger at pH 1 than at pH 7. The product showed the same adsorption amount in Imari bay seawater as that in the aqueous solution at pH 7, which means that phosphorus can be selectively adsorbed on the product in the solution with high salt concentration. The adsorption isotherm at pH 1 was found to applicable to Langmuir model rather than Freundlich model. The maximum calculated adsorption amount was 0.034 mmol g. XRD and FT-IR analyses of the product did not change greatly by mechanochemical treatment, except the Zr-O binding of zircon sand.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89666163","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