Phenylalanine, which is an essential amino acid, is used as a nutritional supplement. Development of a more effective separation technique from the broth is desired. We conducted permeation of phenylalanine through PVC-based membrane containing bi-functional ionic liquid consisting of Aliquat 336 and bis(2-ethylhexyl)phosphoric acid (D2EHPA), [A336][D2EHPA], as a carrier. Phenylalanine successfully permeated through PIMs containing [A336][D2EHPA]. The permeation rates through PIM containing [A336][D2EHPA] were higher than those using a conventional ionic liquid, Aliquat 336. From the experimental data, the overall mass transfer coefficients were calculated and the feed film resistance was found to control the permeation process in a flat-sheet permeation apparatus.
{"title":"Permeation of Phenylalanine through Polymer Inclusion Membrane Containing Bi-functional Ionic Liquid","authors":"M. Matsumoto, Kei Inoue, Y. Tahara","doi":"10.15261/serdj.27.143","DOIUrl":"https://doi.org/10.15261/serdj.27.143","url":null,"abstract":"Phenylalanine, which is an essential amino acid, is used as a nutritional supplement. Development of a more effective separation technique from the broth is desired. We conducted permeation of phenylalanine through PVC-based membrane containing bi-functional ionic liquid consisting of Aliquat 336 and bis(2-ethylhexyl)phosphoric acid (D2EHPA), [A336][D2EHPA], as a carrier. Phenylalanine successfully permeated through PIMs containing [A336][D2EHPA]. The permeation rates through PIM containing [A336][D2EHPA] were higher than those using a conventional ionic liquid, Aliquat 336. From the experimental data, the overall mass transfer coefficients were calculated and the feed film resistance was found to control the permeation process in a flat-sheet permeation apparatus.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093545","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}
In(III) and Ga(III) are included in zinc refining, the wastes of solar panel and electronics and so on. In solvent extraction which is a useful method of separation of metals, we used N -lauroylsarcosine (NLS), containing tertiary amine which is alkyl amide derivative with the sarcosine moiety in the molecule structure in order to separate and recover these metal ions. We studied about the extraction equilibria of these metals using NLS. The selective extraction order of NLS is Ga(III) > In(III) >> Zn(II). It was found that NLS was able to separate these metals by pH difference. Versatic acid 10 (VA10) with only carboxylic acid group in the molecule structure extracted In(III) and Ga(III) simultaneously in the same pH region. Therefore, we found that the amide group included in the molecule structure of NLS has an important role to extract these metals. Mutual separation of In(III), Ga(III) and Zn(II) was carried out by a one-step experiment using NLS. Slope analysis was used to investigate the extraction equilibria of In(III) and Ga(III) with NLS. Suitable concentrations of acids were able to strip these metals from the loaded organic phase.
{"title":"Selective Extraction of In(III) and Ga(III) Using N-Lauroylsarcosine (NLS)","authors":"T. Ito, Shintaro Kanemaru, T. Shiragami, Y. Baba","doi":"10.15261/serdj.27.99","DOIUrl":"https://doi.org/10.15261/serdj.27.99","url":null,"abstract":"In(III) and Ga(III) are included in zinc refining, the wastes of solar panel and electronics and so on. In solvent extraction which is a useful method of separation of metals, we used N -lauroylsarcosine (NLS), containing tertiary amine which is alkyl amide derivative with the sarcosine moiety in the molecule structure in order to separate and recover these metal ions. We studied about the extraction equilibria of these metals using NLS. The selective extraction order of NLS is Ga(III) > In(III) >> Zn(II). It was found that NLS was able to separate these metals by pH difference. Versatic acid 10 (VA10) with only carboxylic acid group in the molecule structure extracted In(III) and Ga(III) simultaneously in the same pH region. Therefore, we found that the amide group included in the molecule structure of NLS has an important role to extract these metals. Mutual separation of In(III), Ga(III) and Zn(II) was carried out by a one-step experiment using NLS. Slope analysis was used to investigate the extraction equilibria of In(III) and Ga(III) with NLS. Suitable concentrations of acids were able to strip these metals from the loaded organic phase.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093712","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}
Tomoya Suzuki, Takeshi Ogata, Mikiya Tanaka, H. Narita
We have found that a mixture of tri-n-octylamine (TOA) and di-n-hexylsulfide (DHS) in CHCl3 displays synergistic extraction of Ru(III) from aqueous HCl. Approximately 55% of Ru(III) was extracted by a 0.25 M TOA–0.25 M DHS system, whereas a single extractant, 0.25 M TOA or 0.25 M DHS, achieves hardly any Ru(III) extraction. Job plots of the extraction of Ru(III) from 5 M HCl aqueous solution indicate formation of a complex with 1:2:1 Ru(III):TOA:DHS stoichiometry. UV-Vis absorption spectra of the extracted Ru(III) complexes suggest that a DHS molecule is bound to the Ru(III) ion in the inner coordination sphere.
我们发现三正辛胺(TOA)和二正己基硫化物(DHS)在CHCl3中的混合物显示出从水溶液HCl中萃取Ru(III)的协同作用。大约55%的Ru(III)被0.25 M TOA - 0.25 M DHS系统提取，而单独的萃取剂，0.25 M TOA或0.25 M DHS几乎不能提取任何Ru(III)。从5 M HCl水溶液中提取Ru(III)的工作图表明，络合物的形成具有1:2:1的Ru(III):TOA:DHS化学计量。提取的Ru(III)配合物紫外可见吸收光谱表明，DHS分子在内配位球中与Ru(III)离子结合。
{"title":"Synergism in the Extraction of Ru(III) by a Tri-n-Octylamine–Di-n-Hexylsulfide System","authors":"Tomoya Suzuki, Takeshi Ogata, Mikiya Tanaka, H. Narita","doi":"10.15261/serdj.27.57","DOIUrl":"https://doi.org/10.15261/serdj.27.57","url":null,"abstract":"We have found that a mixture of tri-n-octylamine (TOA) and di-n-hexylsulfide (DHS) in CHCl3 displays synergistic extraction of Ru(III) from aqueous HCl. Approximately 55% of Ru(III) was extracted by a 0.25 M TOA–0.25 M DHS system, whereas a single extractant, 0.25 M TOA or 0.25 M DHS, achieves hardly any Ru(III) extraction. Job plots of the extraction of Ru(III) from 5 M HCl aqueous solution indicate formation of a complex with 1:2:1 Ru(III):TOA:DHS stoichiometry. UV-Vis absorption spectra of the extracted Ru(III) complexes suggest that a DHS molecule is bound to the Ru(III) ion in the inner coordination sphere.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093659","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. Murakami, Aya Nakao, I. Fujiwara, Shoji Tagashira
The extraction of the Eu(III) thenoyltrifluoroacetone (TTA) chelate was investigated by using the nonionic surfactant octylphenoxypolyethoxyethanol (Triton X-114, n = 8). A cloud point extraction (CPE) method is proposed for the preconcentration of Eu(III) and subsequent determination was carried out by a fluorometric method using a microwell plate reader. Optimal experimental conditions were examined for fluorescence of the TTA chelate in the surfactant phase. Fluorescence was measured at λem = 616 nm after excitation at λex = 355 nm. The extracted species is estimated to be Eu(TTA)3(Triton X-114)1~2 and coordination is competitive between TTA and the oxygen atoms of Triton X-114 depending on each concentration. A content of Eu(III) was directly determined by a plate reader using 100 mm3 of surfactant phase without dilution. The fluorescence intensity, which was measured in a microwell, was a linear function of initial concentration from 1.0 × 10-8 to 8.0 × 10-6 mol dm-3 of Eu(III). The use of microwell plate system is convenient for handling small-volume samples.
{"title":"Cloud Point Extraction and Fluorometric Analysis of Eu(III) with Thenoyltrifluoroacetone and the Nonionic Surfactant Triton X-114","authors":"Y. Murakami, Aya Nakao, I. Fujiwara, Shoji Tagashira","doi":"10.15261/serdj.27.107","DOIUrl":"https://doi.org/10.15261/serdj.27.107","url":null,"abstract":"The extraction of the Eu(III) thenoyltrifluoroacetone (TTA) chelate was investigated by using the nonionic surfactant octylphenoxypolyethoxyethanol (Triton X-114, n = 8). A cloud point extraction (CPE) method is proposed for the preconcentration of Eu(III) and subsequent determination was carried out by a fluorometric method using a microwell plate reader. Optimal experimental conditions were examined for fluorescence of the TTA chelate in the surfactant phase. Fluorescence was measured at λem = 616 nm after excitation at λex = 355 nm. The extracted species is estimated to be Eu(TTA)3(Triton X-114)1~2 and coordination is competitive between TTA and the oxygen atoms of Triton X-114 depending on each concentration. A content of Eu(III) was directly determined by a plate reader using 100 mm3 of surfactant phase without dilution. The fluorescence intensity, which was measured in a microwell, was a linear function of initial concentration from 1.0 × 10-8 to 8.0 × 10-6 mol dm-3 of Eu(III). The use of microwell plate system is convenient for handling small-volume samples.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093919","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}
“Emulsion-flow” is a unique regime of counter-current contact between aqueous and organic phases in a column extractor. The operation enables fast mass transfer as well as stable dropwise counter-current of both phases in a simple column-type apparatus. While those advantages have been reported, prediction of the column performance has been difficult because of the lack of correlation with mass transfer coefficient and interfacial area. This study suggests correlation with overall aqueous phase mass transfer capacity coefficient, Kwa and the height of emulsion phase, H for various operating conditions. In iodine extraction, velocity of organic phase had a stronger effect on H. Furthermore Kwa was correlated with a root of H. This fact suggests that the velocity of the organic phase plays a major role in mass transfer for the case of emulsion-flow. Correlations suggested in the present study are important for rational design and scaling up of emulsion-flow columns.
{"title":"Quantification of Iodine Mass Transfer and Height of Emulsion Phase in “Emulsion-flow” Column","authors":"Mikiro Hirayama, T. Goshima, K. Mizuta, S. Nii","doi":"10.15261/serdj.27.125","DOIUrl":"https://doi.org/10.15261/serdj.27.125","url":null,"abstract":"“Emulsion-flow” is a unique regime of counter-current contact between aqueous and organic phases in a column extractor. The operation enables fast mass transfer as well as stable dropwise counter-current of both phases in a simple column-type apparatus. While those advantages have been reported, prediction of the column performance has been difficult because of the lack of correlation with mass transfer coefficient and interfacial area. This study suggests correlation with overall aqueous phase mass transfer capacity coefficient, Kwa and the height of emulsion phase, H for various operating conditions. In iodine extraction, velocity of organic phase had a stronger effect on H. Furthermore Kwa was correlated with a root of H. This fact suggests that the velocity of the organic phase plays a major role in mass transfer for the case of emulsion-flow. Correlations suggested in the present study are important for rational design and scaling up of emulsion-flow columns.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093942","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. Kinugasa, Takamasa Ichiryu, Miyuki Shinohara, Y. Nishii
Water pollution in China, Southeast Asia and other developing countries is a major problem, one of which is synthetic dyes contained in industrial wastewater. In this study, we focused on reversed micellar extraction which is promising from the viewpoint of both costs and energy saving, and examined the extraction rate of methylene blue (MB) using sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and di(2-ethylhexyl)phosphate (DEHPA). In the AOT/isooctane system, the overall mass transfer coefficient of the MB extraction, KW, decreased with increasing NaCl or KCl concentration. In contrast, in the AOT/2-ethyl-1-hexanol (EHA) and DEHPA/EHA systems, the effect of the KCl concentration was smaller. For the AOT/(isooctane + EHA) and DEHPA/(isooctane + EHA) systems, the KW value increased with increasing EHA concentration. However, the dissolution of MB in the organic solvent cannot be ignored at higher EHA concentrations. At the same concentrations of salt and EHA, the KW values of the AOT and DEHPA systems were almost the same. The dissociation state of DEHPA changed with pH, and the KW value decreased with decreasing pH. It was confirmed that the KW value for MB extraction was determined by the dissociated DEHPA concentration.
{"title":"Extraction Kinetics of Methylene Blue by AOT and DEHPA Reversed Micellar Solution","authors":"T. Kinugasa, Takamasa Ichiryu, Miyuki Shinohara, Y. Nishii","doi":"10.15261/serdj.27.49","DOIUrl":"https://doi.org/10.15261/serdj.27.49","url":null,"abstract":"Water pollution in China, Southeast Asia and other developing countries is a major problem, one of which is synthetic dyes contained in industrial wastewater. In this study, we focused on reversed micellar extraction which is promising from the viewpoint of both costs and energy saving, and examined the extraction rate of methylene blue (MB) using sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and di(2-ethylhexyl)phosphate (DEHPA). In the AOT/isooctane system, the overall mass transfer coefficient of the MB extraction, KW, decreased with increasing NaCl or KCl concentration. In contrast, in the AOT/2-ethyl-1-hexanol (EHA) and DEHPA/EHA systems, the effect of the KCl concentration was smaller. For the AOT/(isooctane + EHA) and DEHPA/(isooctane + EHA) systems, the KW value increased with increasing EHA concentration. However, the dissolution of MB in the organic solvent cannot be ignored at higher EHA concentrations. At the same concentrations of salt and EHA, the KW values of the AOT and DEHPA systems were almost the same. The dissociation state of DEHPA changed with pH, and the KW value decreased with decreasing pH. It was confirmed that the KW value for MB extraction was determined by the dissociated DEHPA concentration.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093594","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}
Shinjiro Yamamoto, Fumiya Tabuchi, Rena Tanaka, S. Hayashi, H. Miyasaka
We report here a hydrophobic ionic liquid (IL), 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (P14-TFSI), that contributed to increasing the amount of production of paclitaxel and the related taxanes of 10-deacetyl baccatin III, baccatin III and cepharomannine with in situ extraction from an aqueous medium in the IL-medium two phase culture system. Addition of an elicitor, methyl jasmonate (MJ) to the cell culture system enhanced the amount of production of the taxanes in the culture including 2.5 % IL. The total amount of the taxanes in the culture including 10 μM MJ and 2.5 vol% IL was more than 200 times greater than those in the control culture in the absence of IL and MJ, and more than two times greater than those in the culture including 2.5 vol% IL alone.
{"title":"Effect of Methyl Jasmonate on Production of Paclitaxel and Related Taxanes in a Hydrophobic Ionic Liquid-Medium Two Phase Culture System","authors":"Shinjiro Yamamoto, Fumiya Tabuchi, Rena Tanaka, S. Hayashi, H. Miyasaka","doi":"10.15261/SERDJ.26.105","DOIUrl":"https://doi.org/10.15261/SERDJ.26.105","url":null,"abstract":"We report here a hydrophobic ionic liquid (IL), 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (P14-TFSI), that contributed to increasing the amount of production of paclitaxel and the related taxanes of 10-deacetyl baccatin III, baccatin III and cepharomannine with in situ extraction from an aqueous medium in the IL-medium two phase culture system. Addition of an elicitor, methyl jasmonate (MJ) to the cell culture system enhanced the amount of production of the taxanes in the culture including 2.5 % IL. The total amount of the taxanes in the culture including 10 μM MJ and 2.5 vol% IL was more than 200 times greater than those in the control culture in the absence of IL and MJ, and more than two times greater than those in the culture including 2.5 vol% IL alone.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093203","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}
M. Cibula, Yusuke Inaba, Yongjie Li, Tomoya Suzuki, H. Narita, K. Takeshita
Michal CIBULA1,*, Yusuke INABA1, Yongjie LI1, Tomoya SUZUKI2,*, Hirokazu NARITA2 and Kenji TAKESHITA1 1Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan; 2Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan (Received October 11, 2018; Accepted November 12, 2018)
{"title":"Effect of HNO3 Concentration on the Pd(II) Extraction Properties using a Thiodiglycolamide Compound","authors":"M. Cibula, Yusuke Inaba, Yongjie Li, Tomoya Suzuki, H. Narita, K. Takeshita","doi":"10.15261/SERDJ.26.43","DOIUrl":"https://doi.org/10.15261/SERDJ.26.43","url":null,"abstract":"Michal CIBULA1,*, Yusuke INABA1, Yongjie LI1, Tomoya SUZUKI2,*, Hirokazu NARITA2 and Kenji TAKESHITA1 1Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan; 2Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan (Received October 11, 2018; Accepted November 12, 2018)","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.43","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093632","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}
Solvent extraction is one of the efficient separation techniques for the removal of toxic chemical species from aqueous media, as well as their enrichment for microanalysis. In this study, extraction of the toxic elements, arsenic, selenium, and antimony from acidic chloride media using the oxygen-containing compounds cyclopentyl methyl ether (CPME), dibutyl carbitol (DBC), and methyl isobutyl ketone (MIBK) was compared. Extraction of As(III) increases with increasing hydrochloric acid concentration and the extractability using CPME, DBC, and MIBK was similar. On the other hand, As(V) was not extracted at all using these extractants. Sb(V) and Se(VI) were extracted at high hydrochloric acid concentration. The order of extractability for Se(IV) in acidic chloride media was MIBK > DBC > CPME. The extraction of As(III) using CPME was examined under various conditions. As As(III) was extracted only at high hydrochloric acid concentration, arsenic trichloride (AsCl3) was suggested as the extracting species. CPME was not saturated with As(III) under the extraction conditions used in this study. As(III) can be enriched by the combination of extraction using CPME followed by back extraction using a small volume of distilled water.
{"title":"Extraction Behavior of Arsenic, Selenium, and Antimony Using Cyclopentyl Methyl Ether from Acidic Chloride Media","authors":"Naoki Matsuo, T. Oshima, K. Ohe, Noriyasu Otsuki","doi":"10.15261/SERDJ.26.81","DOIUrl":"https://doi.org/10.15261/SERDJ.26.81","url":null,"abstract":"Solvent extraction is one of the efficient separation techniques for the removal of toxic chemical species from aqueous media, as well as their enrichment for microanalysis. In this study, extraction of the toxic elements, arsenic, selenium, and antimony from acidic chloride media using the oxygen-containing compounds cyclopentyl methyl ether (CPME), dibutyl carbitol (DBC), and methyl isobutyl ketone (MIBK) was compared. Extraction of As(III) increases with increasing hydrochloric acid concentration and the extractability using CPME, DBC, and MIBK was similar. On the other hand, As(V) was not extracted at all using these extractants. Sb(V) and Se(VI) were extracted at high hydrochloric acid concentration. The order of extractability for Se(IV) in acidic chloride media was MIBK > DBC > CPME. The extraction of As(III) using CPME was examined under various conditions. As As(III) was extracted only at high hydrochloric acid concentration, arsenic trichloride (AsCl3) was suggested as the extracting species. CPME was not saturated with As(III) under the extraction conditions used in this study. As(III) can be enriched by the combination of extraction using CPME followed by back extraction using a small volume of distilled water.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.81","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093730","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}
Three tridentate extractants and three masking reagents including O, N, and S donors have been developed and their properties are compared and discussed. The extractants are N,N,N′,N′-tetraoctyl-diglycolamide (TODGA), methylimino-N,N′-dioctylacetamide (MIDOA) and N,N,N′,N′-tetraoctyl-thiodiglycolamide (TDGA(C8)) together with masking agents having the same central frame but with short alkyl chains. The results of the present study indicate that TODGA can extract mainly hard acid metals belonging to groups 2-4,13-15 in the periodic table. MIDOA can extract soft acid metals and oxyanions (groups 5-10, 16), and TDGA can extract soft acid metals (groups 10-11). Some spectrophotometric studies (UV-vis., IR, and NMR) indicate the stoichiometry and the effect of donor atoms for metal-complexation. The ΔHf values, the heat generation during complex formation, obtained by chemical calculation by DFT theory show a reverse-correlation with their extraction ability.
{"title":"Extractions and Spectroscopic Studies of Various Metals with Diglycolamide-Type Tridentate Ligands","authors":"祐二 佐々木, 盛久 佐伯, 和治 吉塚","doi":"10.15261/SERDJ.26.21","DOIUrl":"https://doi.org/10.15261/SERDJ.26.21","url":null,"abstract":"Three tridentate extractants and three masking reagents including O, N, and S donors have been developed and their properties are compared and discussed. The extractants are N,N,N′,N′-tetraoctyl-diglycolamide (TODGA), methylimino-N,N′-dioctylacetamide (MIDOA) and N,N,N′,N′-tetraoctyl-thiodiglycolamide (TDGA(C8)) together with masking agents having the same central frame but with short alkyl chains. The results of the present study indicate that TODGA can extract mainly hard acid metals belonging to groups 2-4,13-15 in the periodic table. MIDOA can extract soft acid metals and oxyanions (groups 5-10, 16), and TDGA can extract soft acid metals (groups 10-11). Some spectrophotometric studies (UV-vis., IR, and NMR) indicate the stoichiometry and the effect of donor atoms for metal-complexation. The ΔHf values, the heat generation during complex formation, obtained by chemical calculation by DFT theory show a reverse-correlation with their extraction ability.","PeriodicalId":21805,"journal":{"name":"Solvent Extraction Research and Development, Japan","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15261/SERDJ.26.21","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67093610","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：