Ion-exchange technology offers a low-energy potential route to the recovery of fluoride from aluminium industry leachate. This study presents an investigation into the kinetics of fluoride uptake from a simulant leachate and for comparison, from a simple NaF solution, using a lanthanum-loaded chelating resin. Experimental data were found to follow the Ho pseudo 2nd-order rate law and the Elovich equation, suggesting that, although multiple uptake mechanisms occurred on heterogeneous binding sites, the process was chemical reaction-controlled. The maximum observed rate constants were calculated as 0.760 ± 0.01 g mg-1 min-1 (NaF solution) and 0.0724 ± 0.0125 mg-1 min-1 (leachate). However, the maximum calculated equilibrium uptake for the leachate was 26.9 ± 0.2 mg g-1, which was almost twice as high as for NaF solution (14.0 ± 0.9 mg g-1).
{"title":"Kinetics of Defluoridation of Aqueous Waste-streams of the Aluminium Industry with a Modified Chelating Resin","authors":"T. Robshaw, Sudhir Tukra, M. Ogden","doi":"10.5182/JAIE.29.104","DOIUrl":"https://doi.org/10.5182/JAIE.29.104","url":null,"abstract":"Ion-exchange technology offers a low-energy potential route to the recovery of fluoride from aluminium industry leachate. This study presents an investigation into the kinetics of fluoride uptake from a simulant leachate and for comparison, from a simple NaF solution, using a lanthanum-loaded chelating resin. Experimental data were found to follow the Ho pseudo 2nd-order rate law and the Elovich equation, suggesting that, although multiple uptake mechanisms occurred on heterogeneous binding sites, the process was chemical reaction-controlled. The maximum observed rate constants were calculated as 0.760 ± 0.01 g mg-1 min-1 (NaF solution) and 0.0724 ± 0.0125 mg-1 min-1 (leachate). However, the maximum calculated equilibrium uptake for the leachate was 26.9 ± 0.2 mg g-1, which was almost twice as high as for NaF solution (14.0 ± 0.9 mg g-1).","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78323905","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}
Nitrate contamination of surface and groundwater is one of the main problems associated with agricultural activities in many part of the world, and there is an urgent need to develop effective materials and process for efficiently removing excess nitrate from aquatic environment. On the other hands, bittern is one of the resources from seawater to be desired for a new utilization, and contains high amounts of Mg and Ca. In this study, we attempted to prepare the adsorbent with high removal performance for nitrate from bittern. The product including Fe-type layered double hydroxide (Fe-LDH), which has nitrate removal ability, was synthesized from bittern with addition of cheap agent, FeCl3. Fe-LDH can be synthesized from bittern with addition of FeCl3, and the product from the bittern has removal ability for nitrate ion. The equilibrium adsorption capacity of the product for nitrate were measured and extrapolated using Langmuir and Freundlich isotherm models, and experimental data are found to fit Freundlich than Langmuir. The calculated maximum adsorption capacity for nitrate is 0.32 0.47 mmol/g. Adsorption of nitrate increase within 30 min and then gradually decrease, due to the ion exchange reaction of Fe-LDH, and Ca is eluted from the product during the nitrate removal. The product can remove nitrate ion selectively in salty solution.
{"title":"Removal Behavior of Nitrate Using Fe-Layered Double Hydroxide Derived from Bittern","authors":"T. Wajima","doi":"10.5182/JAIE.29.147","DOIUrl":"https://doi.org/10.5182/JAIE.29.147","url":null,"abstract":"Nitrate contamination of surface and groundwater is one of the main problems associated with agricultural activities in many part of the world, and there is an urgent need to develop effective materials and process for efficiently removing excess nitrate from aquatic environment. On the other hands, bittern is one of the resources from seawater to be desired for a new utilization, and contains high amounts of Mg and Ca. In this study, we attempted to prepare the adsorbent with high removal performance for nitrate from bittern. The product including Fe-type layered double hydroxide (Fe-LDH), which has nitrate removal ability, was synthesized from bittern with addition of cheap agent, FeCl3. Fe-LDH can be synthesized from bittern with addition of FeCl3, and the product from the bittern has removal ability for nitrate ion. The equilibrium adsorption capacity of the product for nitrate were measured and extrapolated using Langmuir and Freundlich isotherm models, and experimental data are found to fit Freundlich than Langmuir. The calculated maximum adsorption capacity for nitrate is 0.32 0.47 mmol/g. Adsorption of nitrate increase within 30 min and then gradually decrease, due to the ion exchange reaction of Fe-LDH, and Ca is eluted from the product during the nitrate removal. The product can remove nitrate ion selectively in salty solution.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"42 6 Pt 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82857968","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}
Y. Tachibana, Tatsuya Suzuki, M. Nogami, M. Nomura, T. Kaneshiki
Seven kinds of crown ether resins embedded in high-porous silica beads, benzo-12-crown-4 (BC12), dibenzo-14-crown-4 (DBC14), benzo-15-crown-5 (BC15), benzo-18-crown-6 (BC18), dibenzo-18-crown-6 (DBC18), dibenzo-21-crown-7 (DBC21), and dibenzo-22-crown-6 (DBC22) resins, were synthesized successfully and the adsorption behavior of Li ion on these crown ether resins have been studied in seawater at room temperature. As a result, it was found that the ascending order of the distribution coefficients (Kd) values of Li ion using the seven crown ether resins are DBC14 < BC12 DBC21 DBC18 < DBC22 < BC18 ≤ BC15 and the BC15 resin has comparatively higher adsorption ability for Li ion. Hence, the adsorption behavior of Li ion using the BC15 resin has been examined in detail. It can be seen that the Kd values of Li ion with the BC15 resin increase sharply with increasing the pH 1.5 to 2.7 in seawater due to the dependence of H for the adsorption reaction. The Kd values of Li ion increased sharply with increasing the concentration factor (CF) of seawater in order of 0.10, 0.20, 0.33, 0.50, 1.0 while the Kd value of CF = 1.5 of seawater decreased certainly. The decrease is attributable to the adsorption reactions between the BC15 resin and the main cationic ions. The tendency indicates that the BC15 resin has wonderful selective adsorption ability for Li ion in the wide concentration range of seawater. In addition, we have examined the thermodynamics (Temp. = 278 333 K) of Li ion on the BC15 resin in seawater by using Van’t Hoff equation. The results also imply that the equilibrium adsorption process between the BC15 resin and Li ion is found to be endothermic and the spontaneous reaction mechanism in nature. From these results, we have proposed that the BC15 resin is available for selective recovery of Li ion from various seawater in the wide temperature range.
{"title":"Selective Lithium Recovery from Seawater Using Crown Ether Resins","authors":"Y. Tachibana, Tatsuya Suzuki, M. Nogami, M. Nomura, T. Kaneshiki","doi":"10.5182/JAIE.29.90","DOIUrl":"https://doi.org/10.5182/JAIE.29.90","url":null,"abstract":"Seven kinds of crown ether resins embedded in high-porous silica beads, benzo-12-crown-4 (BC12), dibenzo-14-crown-4 (DBC14), benzo-15-crown-5 (BC15), benzo-18-crown-6 (BC18), dibenzo-18-crown-6 (DBC18), dibenzo-21-crown-7 (DBC21), and dibenzo-22-crown-6 (DBC22) resins, were synthesized successfully and the adsorption behavior of Li ion on these crown ether resins have been studied in seawater at room temperature. As a result, it was found that the ascending order of the distribution coefficients (Kd) values of Li ion using the seven crown ether resins are DBC14 < BC12 DBC21 DBC18 < DBC22 < BC18 ≤ BC15 and the BC15 resin has comparatively higher adsorption ability for Li ion. Hence, the adsorption behavior of Li ion using the BC15 resin has been examined in detail. It can be seen that the Kd values of Li ion with the BC15 resin increase sharply with increasing the pH 1.5 to 2.7 in seawater due to the dependence of H for the adsorption reaction. The Kd values of Li ion increased sharply with increasing the concentration factor (CF) of seawater in order of 0.10, 0.20, 0.33, 0.50, 1.0 while the Kd value of CF = 1.5 of seawater decreased certainly. The decrease is attributable to the adsorption reactions between the BC15 resin and the main cationic ions. The tendency indicates that the BC15 resin has wonderful selective adsorption ability for Li ion in the wide concentration range of seawater. In addition, we have examined the thermodynamics (Temp. = 278 333 K) of Li ion on the BC15 resin in seawater by using Van’t Hoff equation. The results also imply that the equilibrium adsorption process between the BC15 resin and Li ion is found to be endothermic and the spontaneous reaction mechanism in nature. From these results, we have proposed that the BC15 resin is available for selective recovery of Li ion from various seawater in the wide temperature range.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85573669","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}
We have been studied the separation of trivalent actinides and lanthanides by using tertiary pyridine resin. The adsorption behaviors of actinides and lanthanides on the tertiary pyridine resin in the hydrochloric acid system and the nitric acid system are completely different; namely, actinides are strongly adsorbed compared to lanthanides in the hydrochloric acid system, while in the nitric acid system, the adsorption strength depends on only their ionic radii. For the clarification of the adsorption mechanism, the chromatography experiments using the tertiary pyridine resin and the quaternary pyridinium resin were carried out. From a comparison of the adsorption behaviors on these two types of resins, it was concluded that the adsorption mechanism in the hydrochloric acid system is attributable to the coordination with the pyridine group, while in the nitric acid system, the f-elements are adsorbed on the tertiary pyridine resin by the mechanism of the anion exchange adsorption.
{"title":"Adsorption Behaviors of f-Elements on Quaternary Pyridinium Resin","authors":"Tatsuya Suzuki, Y. Fujii, T. Mitsugashira","doi":"10.5182/JAIE.29.67","DOIUrl":"https://doi.org/10.5182/JAIE.29.67","url":null,"abstract":"We have been studied the separation of trivalent actinides and lanthanides by using tertiary pyridine resin. The adsorption behaviors of actinides and lanthanides on the tertiary pyridine resin in the hydrochloric acid system and the nitric acid system are completely different; namely, actinides are strongly adsorbed compared to lanthanides in the hydrochloric acid system, while in the nitric acid system, the adsorption strength depends on only their ionic radii. For the clarification of the adsorption mechanism, the chromatography experiments using the tertiary pyridine resin and the quaternary pyridinium resin were carried out. From a comparison of the adsorption behaviors on these two types of resins, it was concluded that the adsorption mechanism in the hydrochloric acid system is attributable to the coordination with the pyridine group, while in the nitric acid system, the f-elements are adsorbed on the tertiary pyridine resin by the mechanism of the anion exchange adsorption.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89707547","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}
The adsorption method for heavy metal removal from wastewater is focused because of its simplicity and high versatility, and sulfur-impregnated carbonaceous adsorbent is expected as heavy metal adsorbent with high performance at low cost. In this study, sulfur-impregnated carbonaceous filter for removing heavy metals were prepared by pyrolysis of cotton immersed in sulfur solution, K2S, Na2S and NaHS, and the adsorption behavior of nickel was investigated. A nickel adsorption experiment was carried out using a syringe. The sulfur-immersed carbonaceous filter was prepared from cotton via pyrolysis at 400 °C for 1 h after immersing to sulfur solution for 12 h. In the experiment, a syringe which filled with 1 g of the obtained filter and glass wool was used, and a nickel solution was passed through the syringe. The filter with nickel adsorption can be prepared using all sulfur solutions, especially the product prepared by using Na2S has higher adsorption ability than the products using K2S and NaHS. The product obtained using over 0.4 M K2S solution was effective for nickel adsorption. The equilibrium data of nickel adsorption on the product using 1 M K2S was found to Langmuir isotherm model better than Freundlich, and the calculated maximum adsorption capacity is 0.215 mmol/g.
吸附去除废水中重金属的方法因其简单易行、通用性强而备受关注，硫浸渍碳质吸附剂有望成为一种高性能、低成本的重金属吸附剂。本研究通过将棉花浸泡在硫溶液、K2S、Na2S和NaHS中进行热解，制备了硫浸渍碳质除重金属过滤器，并研究了其对镍的吸附行为。采用注射器对镍进行了吸附实验。以棉花为原料，在硫溶液中浸泡12 h，在400℃下热解1 h，得到硫浸碳质过滤器。实验中使用注射器，注射器中装满1 g得到的过滤器和玻璃棉，并将镍溶液通过注射器。所有含硫溶液均可制备镍吸附过滤器，特别是用Na2S制备的产品比用K2S和NaHS制备的产品具有更高的吸附能力。用0.4 M以上的K2S溶液得到的产物对镍有较好的吸附效果。1 M K2S吸附镍的平衡数据较Freundlich模型更符合Langmuir等温模型，计算出的最大吸附量为0.215 mmol/g。
{"title":"Preparation of Sulfur-Impregnated Carbonaceous Filter with High Heavy Metal Adsorption Capacity","authors":"Masaya Iguchi, T. Wajima","doi":"10.5182/JAIE.29.153","DOIUrl":"https://doi.org/10.5182/JAIE.29.153","url":null,"abstract":"The adsorption method for heavy metal removal from wastewater is focused because of its simplicity and high versatility, and sulfur-impregnated carbonaceous adsorbent is expected as heavy metal adsorbent with high performance at low cost. In this study, sulfur-impregnated carbonaceous filter for removing heavy metals were prepared by pyrolysis of cotton immersed in sulfur solution, K2S, Na2S and NaHS, and the adsorption behavior of nickel was investigated. A nickel adsorption experiment was carried out using a syringe. The sulfur-immersed carbonaceous filter was prepared from cotton via pyrolysis at 400 °C for 1 h after immersing to sulfur solution for 12 h. In the experiment, a syringe which filled with 1 g of the obtained filter and glass wool was used, and a nickel solution was passed through the syringe. The filter with nickel adsorption can be prepared using all sulfur solutions, especially the product prepared by using Na2S has higher adsorption ability than the products using K2S and NaHS. The product obtained using over 0.4 M K2S solution was effective for nickel adsorption. The equilibrium data of nickel adsorption on the product using 1 M K2S was found to Langmuir isotherm model better than Freundlich, and the calculated maximum adsorption capacity is 0.215 mmol/g.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83966147","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}
James P. BEZZINA, James T. M. AMPHLETT, Mark D. OGDEN
{"title":"Extraction of Heavy Metals from Simulant Citrate Leachate of Sewage Sludge by Ion Exchange","authors":"James P. BEZZINA, James T. M. AMPHLETT, Mark D. OGDEN","doi":"10.5182/jaie.29.53","DOIUrl":"https://doi.org/10.5182/jaie.29.53","url":null,"abstract":"","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91553516","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}
Yuri Okada, Harumi Yamada, K. Fujinaga, Y. Komatsu, Mune-aki Sakamoto, S. Oshima
A cellulose fiber was modified with Schiff base compound having the complexation ability of metal ions, and the modified cellulose fiber used as a metal ion adsorbent. The modified cellulose fiber was synthesized by reacting glycidyl methacrylate using diammonium cerium(IV) nitrate as a catalyst followd by reacting with bis-(2-pyridylmethylideneiminoethyl) amine as Schiff base compound having pyridyl groups. The obtained cellulose fiber, BPIEA-GMA grafted cellulose was characterized by SEM, IR, and XPS and used as a metal ion adsorbent. The adsorption behavior of metal ions on the BPIEA-GMA grafted cellulose was investigated. The examined metal ions except for Pb 2+ , Mn 2+ , and Rh 2+ were almost quantitatively adsorbed on the BPIEA-GMA grafted cellulose fiber. In addition, Pt 2+ and Pd 2+ able to adsorbed in hydrochloric acidic medium. The recovery of adsorbed metal ions except for precious metal ions from the adsorbent was successful, and the BPIEA-GMA grafted cellulose was able to use as a metal ion adsorbent by repeated twice. These results suggest that the modified cellulose fiber with Schiff base compound having pyridyl groups can be used as a metal ion adsorbents.
{"title":"Adsorption Behavior of Metal Ions on Cellulose Fiber Modified with Schiff Base Compound Having Pyridyl Groups","authors":"Yuri Okada, Harumi Yamada, K. Fujinaga, Y. Komatsu, Mune-aki Sakamoto, S. Oshima","doi":"10.5182/JAIE.29.83","DOIUrl":"https://doi.org/10.5182/JAIE.29.83","url":null,"abstract":"A cellulose fiber was modified with Schiff base compound having the complexation ability of metal ions, and the modified cellulose fiber used as a metal ion adsorbent. The modified cellulose fiber was synthesized by reacting glycidyl methacrylate using diammonium cerium(IV) nitrate as a catalyst followd by reacting with bis-(2-pyridylmethylideneiminoethyl) amine as Schiff base compound having pyridyl groups. The obtained cellulose fiber, BPIEA-GMA grafted cellulose was characterized by SEM, IR, and XPS and used as a metal ion adsorbent. The adsorption behavior of metal ions on the BPIEA-GMA grafted cellulose was investigated. The examined metal ions except for Pb 2+ , Mn 2+ , and Rh 2+ were almost quantitatively adsorbed on the BPIEA-GMA grafted cellulose fiber. In addition, Pt 2+ and Pd 2+ able to adsorbed in hydrochloric acidic medium. The recovery of adsorbed metal ions except for precious metal ions from the adsorbent was successful, and the BPIEA-GMA grafted cellulose was able to use as a metal ion adsorbent by repeated twice. These results suggest that the modified cellulose fiber with Schiff base compound having pyridyl groups can be used as a metal ion adsorbents.","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80095998","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}
We have examined the effect of the mixing ratio of methyl benzoate (MB) and bis(2ethylhexyl)phthalate (DEHP) in the synthetic process on the Li isotope fractionation in the cation exchange reaction. MB / DEHP volume mixing ratios were adjusted to 1 / 9 and 9 / 1. For the purpose, the two kinds of porous-type cation exchange resins with the cross-linkage of 50 wt% degree were synthesized by suspension polymerization. Both the particle size distribution was found to be similar in the synthetic processes. On the other hand, it was found that the surface structure from the condition; MB : DEHP = 1 : 9 is much rougher than that from the condition; MB : DEHP = 9 : 1, judging from the SEM images. Based on this result, the Li isotope fractionation experiments using two kinds of poroustype sulfonated styrene-divinylbenzene resins were performed in the weak basic solution at 298 K. We have confirmed that the Li isotope separation phenomena by confirming a sharp boundary on the chromatographic curve at each band-end where lighter Li isotope are enriched in the resin phase and heavier Li isotope is enriched in the aqueous phase. Two kinds of Li isotope separation coefficients (ε) per unit mass (ε/ Mass) values were respectively 3.3 × 10 for MB : DEHP = 1 : 9 and 1.7 × 10 for MB : DEHP = 9 : 1 in spite of the same cross-linkage degree. Therefore, we have concluded that the much rougher surface structure of the resins is very important parameter to improve ε/ Mass values in the Li isotope cation exchange reactions.
{"title":"Lithium Isotope Fractionation in Weak Basic Solution Using Cation Exchange Chromatography","authors":"Y. Tachibana, Andri Rahma Putra, Suki Hashimoto, Tatsuya Suzuki, Masahiro Tanaka","doi":"10.5182/JAIE.29.41","DOIUrl":"https://doi.org/10.5182/JAIE.29.41","url":null,"abstract":"We have examined the effect of the mixing ratio of methyl benzoate (MB) and bis(2ethylhexyl)phthalate (DEHP) in the synthetic process on the Li isotope fractionation in the cation exchange reaction. MB / DEHP volume mixing ratios were adjusted to 1 / 9 and 9 / 1. For the purpose, the two kinds of porous-type cation exchange resins with the cross-linkage of 50 wt% degree were synthesized by suspension polymerization. Both the particle size distribution was found to be similar in the synthetic processes. On the other hand, it was found that the surface structure from the condition; MB : DEHP = 1 : 9 is much rougher than that from the condition; MB : DEHP = 9 : 1, judging from the SEM images. Based on this result, the Li isotope fractionation experiments using two kinds of poroustype sulfonated styrene-divinylbenzene resins were performed in the weak basic solution at 298 K. We have confirmed that the Li isotope separation phenomena by confirming a sharp boundary on the chromatographic curve at each band-end where lighter Li isotope are enriched in the resin phase and heavier Li isotope is enriched in the aqueous phase. Two kinds of Li isotope separation coefficients (ε) per unit mass (ε/ Mass) values were respectively 3.3 × 10 for MB : DEHP = 1 : 9 and 1.7 × 10 for MB : DEHP = 9 : 1 in spite of the same cross-linkage degree. Therefore, we have concluded that the much rougher surface structure of the resins is very important parameter to improve ε/ Mass values in the Li isotope cation exchange reactions.","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":"79584751","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}
{"title":"Lithium Recovery from Various Resources Using Ion Exchange","authors":"K. Yoshizuka","doi":"10.5182/JAIE.29.17","DOIUrl":"https://doi.org/10.5182/JAIE.29.17","url":null,"abstract":"","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"134 1","pages":"17-24"},"PeriodicalIF":0.0,"publicationDate":"2018-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77890391","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}
{"title":"A Synthetic Procedure for Large Amount of Ion-exchangeable Fluorine Micas for Studies in Laboratory","authors":"H. Sakane, K. Uchida","doi":"10.5182/JAIE.29.35","DOIUrl":"https://doi.org/10.5182/JAIE.29.35","url":null,"abstract":"","PeriodicalId":16331,"journal":{"name":"Journal of ion exchange","volume":"29 1","pages":"35-39"},"PeriodicalIF":0.0,"publicationDate":"2018-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73740509","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}
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