Rintaro Hoshino, M. Ogawa, K. Murakami, Wahyudiono, H. Kanda, M. Goto
Simple and energy-saving extraction of lipids and functional substances from wet Arthrospira platensis by using liquefied dimethyl ether (DME) is proposed. In the proposed method, drying of microalgae, cell wall breaking, heating for solvent evaporation is unnecessary. Direct extraction from wet A. platensis was successfully achieved. 94.2 wt% of the water in the A. platensis was removed by liquefied DME extraction and a dry residue was obtained. The amounts of carotenoid pigments extracted by liquefied DME were less than those by supercritical carbon dioxide (SC-CO2) extraction and hexane extraction. Also the amounts of carotenoid pigments extracted were smaller than those extracted with conventional solvents such as SCCO2 and hexane.
{"title":"Extraction of Lipids from Wet Arthrospira platensis by Liquefied Dimethyl Ether","authors":"Rintaro Hoshino, M. Ogawa, K. Murakami, Wahyudiono, H. Kanda, M. Goto","doi":"10.15261/SERDJ.24.47","DOIUrl":"https://doi.org/10.15261/SERDJ.24.47","url":null,"abstract":"Simple and energy-saving extraction of lipids and functional substances from wet Arthrospira platensis by using liquefied dimethyl ether (DME) is proposed. In the proposed method, drying of microalgae, cell wall breaking, heating for solvent evaporation is unnecessary. Direct extraction from wet A. platensis was successfully achieved. 94.2 wt% of the water in the A. platensis was removed by liquefied DME extraction and a dry residue was obtained. The amounts of carotenoid pigments extracted by liquefied DME were less than those by supercritical carbon dioxide (SC-CO2) extraction and hexane extraction. Also the amounts of carotenoid pigments extracted were smaller than those extracted with conventional solvents such as SCCO2 and hexane.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79967406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Ohto, Hiroaki Furugou, Takuyou Yoshinaga, Shintaro Morisada, H. Kawakita, K. Inoue
Thiol and dithioether derivatives of tripodal extraction reagents have been newly prepared and employed to investigate the extraction behavior of precious metals. Both sulfur-containing compounds did not exhibit a pH dependency for precious metal extraction. The thiol type derivative exhibited a high extraction ability for gold(III), silver and palladium(II), and a 1 : 3 (extractant : metal) stoichiometry for gold(III) and silver. The results showed that the thiol derivative exhibited little structural effect due to the strong functionality of thiol group. The dithioether derivative also extracted gold(III), silver and palladium(II), however the silver extraction is caused by the structural effect of the tripodal framework, while gold(III) and palladium(II) extraction is probably attributed to a partial structural effect. The tripodal derivative possesses a high extraction ability compared with the corresponding monopodal compound. Tripodal and monopodal derivatives showed 1 : 1 and 1 : 2 (extractant : metal) stoichiometry for silver. This means that the tripodal derivative exhibited the structural effect as a size effect, converging effect of the multi functionality, complementary effect. The coordination site of the tripodal derivative was confirmed by 1H-NMR spectra before and after the silver loading. Stripping of the loaded silver from the tripodal derivative was also investigated. Finally, the stepwise separation of silver and palladium(II) was carried out and roughly achieved by using different eluents.
{"title":"Precious Metal Extraction with Thiol and Dithioether Derivatives of a Trident Molecule","authors":"K. Ohto, Hiroaki Furugou, Takuyou Yoshinaga, Shintaro Morisada, H. Kawakita, K. Inoue","doi":"10.15261/SERDJ.24.77","DOIUrl":"https://doi.org/10.15261/SERDJ.24.77","url":null,"abstract":"Thiol and dithioether derivatives of tripodal extraction reagents have been newly prepared and employed to investigate the extraction behavior of precious metals. Both sulfur-containing compounds did not exhibit a pH dependency for precious metal extraction. The thiol type derivative exhibited a high extraction ability for gold(III), silver and palladium(II), and a 1 : 3 (extractant : metal) stoichiometry for gold(III) and silver. The results showed that the thiol derivative exhibited little structural effect due to the strong functionality of thiol group. The dithioether derivative also extracted gold(III), silver and palladium(II), however the silver extraction is caused by the structural effect of the tripodal framework, while gold(III) and palladium(II) extraction is probably attributed to a partial structural effect. The tripodal derivative possesses a high extraction ability compared with the corresponding monopodal compound. Tripodal and monopodal derivatives showed 1 : 1 and 1 : 2 (extractant : metal) stoichiometry for silver. This means that the tripodal derivative exhibited the structural effect as a size effect, converging effect of the multi functionality, complementary effect. The coordination site of the tripodal derivative was confirmed by 1H-NMR spectra before and after the silver loading. Stripping of the loaded silver from the tripodal derivative was also investigated. Finally, the stepwise separation of silver and palladium(II) was carried out and roughly achieved by using different eluents.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85124647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Teppei Watari, Daiki Takase, S. Nishihama, K. Yoshizuka
Separation of cobalt and nickel was investigated using a 4-stage countercurrent mixer-settler cascade, employing 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester as the extractant. Extraction equilibrium formulations were established up to high loading ratios and extraction constants were determined, based on a batch extraction system in both single metal and binary metal systems. The separation of cobalt and nickel was then carried out using the 4-stage countercurrent mixer-settler cascade. Selective extraction of cobalt was achieved by the extraction step, while a small amount of nickel was also extracted. Nickel in the organic solution was removed by scrubbing with the solution containing the metals, while the recovery of cobalt was decreased. The concentration profiles of the metals with the countercurrent mixer-settler cascade were calculated based on the determined extraction equilibrium formulations and the material balance, although the calculation diverged when the pH was high especially at the 4th stage.
{"title":"Separation of Cobalt and Nickel with 2-Ethylhexyl Phosphonic Acid Mono-2-Ethylhexyl Ester Using a Countercurrent Mixer-Settler Cascade","authors":"Teppei Watari, Daiki Takase, S. Nishihama, K. Yoshizuka","doi":"10.15261/SERDJ.24.131","DOIUrl":"https://doi.org/10.15261/SERDJ.24.131","url":null,"abstract":"Separation of cobalt and nickel was investigated using a 4-stage countercurrent mixer-settler cascade, employing 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester as the extractant. Extraction equilibrium formulations were established up to high loading ratios and extraction constants were determined, based on a batch extraction system in both single metal and binary metal systems. The separation of cobalt and nickel was then carried out using the 4-stage countercurrent mixer-settler cascade. Selective extraction of cobalt was achieved by the extraction step, while a small amount of nickel was also extracted. Nickel in the organic solution was removed by scrubbing with the solution containing the metals, while the recovery of cobalt was decreased. The concentration profiles of the metals with the countercurrent mixer-settler cascade were calculated based on the determined extraction equilibrium formulations and the material balance, although the calculation diverged when the pH was high especially at the 4th stage.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86544027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ayano NAKAMURA1, Yuki HARA1 and Tomonori KAWANO1-3* 1 Faculty and Graduate School of Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan; 2 International Photosynthesis Industrialization Research Center, The University of Kitakyushu, Kitakyushu, Japan; 3 University of Florence-LINV Kitakyushu Research Center (LINV@Kitakyushu), Kitakyushu, Japan (Received July 21, 2016; Accepted October 10, 2016)
{"title":"Dewatering and Extraction of Hydrophilic Solutes and Essential Oils from Cryo-preserved Lemon Peels Using Liquefied Dimethyl Ether","authors":"Ayano Nakamura, Yuki Hara, T. Kawano","doi":"10.15261/SERDJ.24.37","DOIUrl":"https://doi.org/10.15261/SERDJ.24.37","url":null,"abstract":"Ayano NAKAMURA1, Yuki HARA1 and Tomonori KAWANO1-3* 1 Faculty and Graduate School of Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan; 2 International Photosynthesis Industrialization Research Center, The University of Kitakyushu, Kitakyushu, Japan; 3 University of Florence-LINV Kitakyushu Research Center (LINV@Kitakyushu), Kitakyushu, Japan (Received July 21, 2016; Accepted October 10, 2016)","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79235629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Sasaki, Keisuke Morita, Shin'ichi Suzuki, H. Shiwaku, Ito Keisuke, Takahashi Yuya, M. Kaneko
The solvent extraction of Se(IV), Zr(IV), Pd(II), and Cs(I) from nitric acid into 1-octanol (OC), or 1-octanol and n -dodecane has been performed. These elements include long-lived radionuclides in spent nuclear fuels, so a simple separation method is indispensable for the development of the treatment of high-level liquid radioactive waste. It was found that Se can be extracted using phenylenediamine, Zr(IV) can be extracted using tetraoctyl diglycolamide and di-2-ethylhexyl phosphoric acid, and Pd can be extracted using (methylimino)bis( N , N -dioctylacetamide) and N , N , N ’, N ’, N ”, N ”-hexaoctylnitrilotriacetamide. These elements can be recovered in over 90% yield by these extractants from nitric acid into OC. A distribution ratio of Cs(I) of greater than 1 can be obtained using di-t-butyldibenzo-18-crown-6. It is clear that 90% recovery of Cs(I) can be achieved using an extraction solvent with ten times the volume of the aqueous phase.
用溶剂法从硝酸中萃取Se(IV)、Zr(IV)、Pd(II)和Cs(I)，得到1-辛醇(OC)或1-辛醇和正十二烷。这些元素包括乏核燃料中的长寿命放射性核素，因此一种简单的分离方法对于发展高放射性液体废物的处理是必不可少的。结果表明，硒可以用苯二胺提取，Zr(IV)可以用四辛基二甘醇酰胺和二-2-乙基己基磷酸提取，Pd可以用(甲基)二(N, N -二辛基乙酰胺)和N, N, N '， N '， N '， N '， N ' -六辛基硝基三乙酰胺提取。用这些萃取剂从硝酸中提取这些元素，回收率超过90%。使用二叔丁基二苯并-18-冠-6可以得到Cs(I)的分布比大于1。很明显，使用十倍于水相体积的萃取溶剂，Cs(I)的回收率可以达到90%。
{"title":"Extraction and Separation of Se, Zr, Pd, and Cs Including Long-Lived Radionuclides","authors":"Y. Sasaki, Keisuke Morita, Shin'ichi Suzuki, H. Shiwaku, Ito Keisuke, Takahashi Yuya, M. Kaneko","doi":"10.15261/SERDJ.24.113","DOIUrl":"https://doi.org/10.15261/SERDJ.24.113","url":null,"abstract":"The solvent extraction of Se(IV), Zr(IV), Pd(II), and Cs(I) from nitric acid into 1-octanol (OC), or 1-octanol and n -dodecane has been performed. These elements include long-lived radionuclides in spent nuclear fuels, so a simple separation method is indispensable for the development of the treatment of high-level liquid radioactive waste. It was found that Se can be extracted using phenylenediamine, Zr(IV) can be extracted using tetraoctyl diglycolamide and di-2-ethylhexyl phosphoric acid, and Pd can be extracted using (methylimino)bis( N , N -dioctylacetamide) and N , N , N ’, N ’, N ”, N ”-hexaoctylnitrilotriacetamide. These elements can be recovered in over 90% yield by these extractants from nitric acid into OC. A distribution ratio of Cs(I) of greater than 1 can be obtained using di-t-butyldibenzo-18-crown-6. It is clear that 90% recovery of Cs(I) can be achieved using an extraction solvent with ten times the volume of the aqueous phase.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84182062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Oshima, Naoki Ohkubo, Iori Fujiwara, T. Horiuchi, Takao Koyama, K. Ohe, Y. Baba
Recently, cyclopentyl methyl ether (CPME) has found use as a commercially available solvent for various applications. As CPME shows better properties such as more hydrophobicity, less solublity in water, less volatility, and more stablity compared with typical ethereal solvents, it could be used as a diluent or an extractant in liquid-liquid extraction systems. In the present study, CPME was found to be useful for the extraction of Au(III) in hydrochloric acid media. Extraction of Au(III) increased with as increase in the hydrochloric acid concentration. Au(III) was selectively extracted using CPME from other precious metal ions and base metal ions. From the result of the dependency of the Au(III) concentration, CPME can load at least 0.93 g/dm3 Au(III). Extracted Au(III) was quantitatively stripped from CPME using 0.1 M aqueous thiourea solution. As the solubility of water into CPME is much smaller than that into alcohols such as 1-hexanol, CPME is more favorable as an extractant for Au(III) in hydrochloric acid media.
{"title":"Extraction of Gold(III) Using Cyclopentyl Methyl Ether in Hydrochloric Acid Media","authors":"T. Oshima, Naoki Ohkubo, Iori Fujiwara, T. Horiuchi, Takao Koyama, K. Ohe, Y. Baba","doi":"10.15261/SERDJ.24.89","DOIUrl":"https://doi.org/10.15261/SERDJ.24.89","url":null,"abstract":"Recently, cyclopentyl methyl ether (CPME) has found use as a commercially available solvent for various applications. As CPME shows better properties such as more hydrophobicity, less solublity in water, less volatility, and more stablity compared with typical ethereal solvents, it could be used as a diluent or an extractant in liquid-liquid extraction systems. In the present study, CPME was found to be useful for the extraction of Au(III) in hydrochloric acid media. Extraction of Au(III) increased with as increase in the hydrochloric acid concentration. Au(III) was selectively extracted using CPME from other precious metal ions and base metal ions. From the result of the dependency of the Au(III) concentration, CPME can load at least 0.93 g/dm3 Au(III). Extracted Au(III) was quantitatively stripped from CPME using 0.1 M aqueous thiourea solution. As the solubility of water into CPME is much smaller than that into alcohols such as 1-hexanol, CPME is more favorable as an extractant for Au(III) in hydrochloric acid media.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76075952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Ohto, Y. Hashimoto, Y. Ueda, Ayahiro Yamashita, Shintaro Morisada, H. Kawakita
Solid phase extractive removal of harmful formaldehyde with an imination reaction on a resin impregnated with a trident amine derivative has been investigated to compare the removal behavior with extractive removal with the trident amine derivative reported in the previous work. The impregnated resin also effectively removed formaldehyde while maintaining the extractive removal performance of the impregnated triamine. In particular, the leakage of the impregnated amine was significantly suppressed in the solid phase extraction with the impregnated resin compared with that in the extraction system.
{"title":"Formaldehyde Removal by Using Solid Phase Extraction with an Imination Reaction on an Amine Type Trident Molecule-Impregnated Resin","authors":"K. Ohto, Y. Hashimoto, Y. Ueda, Ayahiro Yamashita, Shintaro Morisada, H. Kawakita","doi":"10.15261/SERDJ.23.181","DOIUrl":"https://doi.org/10.15261/SERDJ.23.181","url":null,"abstract":"Solid phase extractive removal of harmful formaldehyde with an imination reaction on a resin impregnated with a trident amine derivative has been investigated to compare the removal behavior with extractive removal with the trident amine derivative reported in the previous work. The impregnated resin also effectively removed formaldehyde while maintaining the extractive removal performance of the impregnated triamine. In particular, the leakage of the impregnated amine was significantly suppressed in the solid phase extraction with the impregnated resin compared with that in the extraction system.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76545123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Sasaki, Keisuke Morita, S. Shimazaki, Yasuhiro Tsubata, M. Ozawa
In this study, we examined the masking effects of 16 water-miscible reagents, on the extraction of Mo, Re, Ru, and Pd. These reagents included soft Nand/or Sdonor atoms in their structures and they function as multidentate ligands. The extractants, methylimino-N,N-dioctylacetamide (MIDOA) and N,N,N’,N’,N’’,N’’-hexaoctyl-nitrilotriacetamide (NTAamide(C8)), show significantly high distribution ratios for these metals(D(M)), were employed in this study. Masking effects were observed as a decrease in D(M) with an increase of masking agent concentration in these extraction systems. The results showed that D(Pd) can be considerably decreased by the addition of thiourea, cysteine, cysteamine, trisaminoethylamine, and diethylenetriamine, and D(Ru) is decreased by the addition of thiourea, trisaminoethylamine, and diethylenetriamine. Pd and Ru can be masked by similar reagents including Nor Sdonor atoms, which suppressed the extraction into the organic phase. In contrast, D(Mo) was only slightly masked by the above-mentioned reagents. The masking of Mo was achieved using methylimino-N,N’-diethylacetamide, hexaethyl-nitrilotriacetamide, iminodiacetic acid, and iminodimethylphosphonic acid, which have a central N(CH2C(P)=O)2 framework that is important for this purpose. A masking agent for Re was not found in this study.
{"title":"Masking Effects for Mo, Re, Pd and Ru by S and N-Donor Reagents through MIDOA and Ntaamide Extraction","authors":"Y. Sasaki, Keisuke Morita, S. Shimazaki, Yasuhiro Tsubata, M. Ozawa","doi":"10.15261/SERDJ.23.161","DOIUrl":"https://doi.org/10.15261/SERDJ.23.161","url":null,"abstract":"In this study, we examined the masking effects of 16 water-miscible reagents, on the extraction of Mo, Re, Ru, and Pd. These reagents included soft Nand/or Sdonor atoms in their structures and they function as multidentate ligands. The extractants, methylimino-N,N-dioctylacetamide (MIDOA) and N,N,N’,N’,N’’,N’’-hexaoctyl-nitrilotriacetamide (NTAamide(C8)), show significantly high distribution ratios for these metals(D(M)), were employed in this study. Masking effects were observed as a decrease in D(M) with an increase of masking agent concentration in these extraction systems. The results showed that D(Pd) can be considerably decreased by the addition of thiourea, cysteine, cysteamine, trisaminoethylamine, and diethylenetriamine, and D(Ru) is decreased by the addition of thiourea, trisaminoethylamine, and diethylenetriamine. Pd and Ru can be masked by similar reagents including Nor Sdonor atoms, which suppressed the extraction into the organic phase. In contrast, D(Mo) was only slightly masked by the above-mentioned reagents. The masking of Mo was achieved using methylimino-N,N’-diethylacetamide, hexaethyl-nitrilotriacetamide, iminodiacetic acid, and iminodimethylphosphonic acid, which have a central N(CH2C(P)=O)2 framework that is important for this purpose. A masking agent for Re was not found in this study.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82913362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takeshi Ogata, H. Narita, Mikiya Tanaka, Y. Muraki, H. Higuchi, Masaya Nishigawara
{"title":"Diglycolamic Acid–Grafted Film-Type Adsorbent for Selective Recovery of Rare Earth Elements","authors":"Takeshi Ogata, H. Narita, Mikiya Tanaka, Y. Muraki, H. Higuchi, Masaya Nishigawara","doi":"10.15261/SERDJ.23.121","DOIUrl":"https://doi.org/10.15261/SERDJ.23.121","url":null,"abstract":"","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91184500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Imane Boulenouar, M. Kaid, Okkacha Abbes, D. Villemin
The solvent extraction of lanthanum(III) and europium(III) by aminooctyldimethylene diphosphonic acid from nitrate media was investigated. The extraction percent of lanthanum(III) and europium(III) was measured as a function of various parameters such as: volume ratio, shaking time, the concentration of aminooctyldimethylene diphosphonic acid, ionic strength and media pH. The metal concentration in the aqueous phase before and after extraction was determined spectrophotometrically by the Arsenazo III method. The extracted species and equilibrium extraction equations were determined by the slope analysis method. It was found that adding KNO3 at a concentration of 0.1 M significantly enhances the extraction yield for lanthanum(III) and europium(III). Decreasing the media pH caused a gradual decrease of extraction yields. The obtained results showed that extraction of lanthanum(III) and europium(III) from nitrate media using aminooctyldimethylene diphosphonic acid in chloroform is quantitative under well-defined conditions.
{"title":"Solvent Extraction of Lanthanum(III) and Europium(III) from Nitrate Media by Aminooctyldimethylene Diphosphonic Acid","authors":"Imane Boulenouar, M. Kaid, Okkacha Abbes, D. Villemin","doi":"10.15261/SERDJ.23.51","DOIUrl":"https://doi.org/10.15261/SERDJ.23.51","url":null,"abstract":"The solvent extraction of lanthanum(III) and europium(III) by aminooctyldimethylene diphosphonic acid from nitrate media was investigated. The extraction percent of lanthanum(III) and europium(III) was measured as a function of various parameters such as: volume ratio, shaking time, the concentration of aminooctyldimethylene diphosphonic acid, ionic strength and media pH. The metal concentration in the aqueous phase before and after extraction was determined spectrophotometrically by the Arsenazo III method. The extracted species and equilibrium extraction equations were determined by the slope analysis method. It was found that adding KNO3 at a concentration of 0.1 M significantly enhances the extraction yield for lanthanum(III) and europium(III). Decreasing the media pH caused a gradual decrease of extraction yields. The obtained results showed that extraction of lanthanum(III) and europium(III) from nitrate media using aminooctyldimethylene diphosphonic acid in chloroform is quantitative under well-defined conditions.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86637425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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