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Wu H, Kim SY, Takahashi T, Oosugi H, Ito T, Kanie K. Extraction behaviors of platinum group metals in simulated high-level liquid waste by a hydrophobic ionic liquid bearing an amino moiety. NUCLEAR ENGINEERING AND TECHNOLOGY 2021. [DOI: 10.1016/j.net.2020.09.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Wu H, Osawa N, Kubota M, Kim SY. Adsorption and separation behavior of palladium(II) from simulated high-level liquid waste using a novel silica-based adsorbents. RADIOCHIM ACTA 2021. [DOI: 10.1515/ract-2020-0071] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Aiming at selective adsorption and separation of Pd(II) in nitric acid solution, a hybrid soft N and hard O donor adsorbent (TAMIA-EH+TOA)/SiO2–P (P = Polymer) was successfully synthesized. The adsorption performances of (TAMIA-EH+TOA)/SiO2–P adsorbent towards Pd(II) were systematically investigated as a function of contact time, effect of concentration of nitric acid, effect of temperature etc. Adsorption speed of Pd(II) was fairly fast and can reach equilibrium state within only 0.5 h. The distribution coefficient of Pd(II) was more than 103 when [HNO3] = 0.1. Though it decreased gradually with an increase in the concentration of HNO3, the adsorption selectivity of (TAMIA-EH+TOA)/SiO2–P adsorbent towards Pd(II) was still significant than other co-existing metal ions in the whole HNO3 range from 0.1 to 5 M. The adsorption isotherm of Pd(II) onto (TAMIA-EH+TOA)/SiO2–P adsorbent fitted well with Langmuir adsorption model but Freundlich isotherm model. The calculated results of adsorption thermodynamic parameters indicated that the adsorption process of Pd(II) was exothermic and happened in a natural way. Furthermore, the separation chromatography experiment by utilizing (TAMIA-EH+TOA)/SiO2–P adsorbent packed column was carried out. Based on the results of plotted elution curves, it was found that the successful recovery of Pd(II) (96.27%) was achieved by eluting with thiourea solution.
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Affiliation(s)
- Hao Wu
- Department of Quantum Science and Energy Engineering , Graduate School of Engineering, Tohoku University , Sendai , Miyagi 980-8579 , Japan
| | - Naoki Osawa
- Department of Quantum Science and Energy Engineering , Graduate School of Engineering, Tohoku University , Sendai , Miyagi 980-8579 , Japan
| | - Masahiko Kubota
- Department of Quantum Science and Energy Engineering , Graduate School of Engineering, Tohoku University , Sendai , Miyagi 980-8579 , Japan
| | - Seong-Yun Kim
- Department of Quantum Science and Energy Engineering , Graduate School of Engineering, Tohoku University , Sendai , Miyagi 980-8579 , Japan
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KIM SY, TAKAHASHI T, WU H. Selective Separation of Trivalent Europium(III) from Americium(III) using <i>N,N′</i>Dimethyl-<i>N,N′</i>-di-2-phenylethyl-diglycol Amide (MPEDGA) Extractant in Ionic Liquid. SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT-JAPAN 2021. [DOI: 10.15261/serdj.28.49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Seong-Yun KIM
- Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University
| | - Tadayuki TAKAHASHI
- Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University
| | - Hao WU
- Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University
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Pikula K, Mintcheva N, Kulinich SA, Zakharenko A, Markina Z, Chaika V, Orlova T, Mezhuev Y, Kokkinakis E, Tsatsakis A, Golokhvast K. Aquatic toxicity and mode of action of CdS and ZnS nanoparticles in four microalgae species. ENVIRONMENTAL RESEARCH 2020; 186:109513. [PMID: 32305679 DOI: 10.1016/j.envres.2020.109513] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/09/2020] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
This study reports the differences in toxic action between cadmium sulfide (CdS) and zinc sulfide (ZnS) nanoparticles (NPs) prepared by recently developed xanthate-mediated method. The aquatic toxicity of the synthesized NPs on four marine microalgae species was explored. Growth rate, esterase activity, membrane potential, and morphological changes of microalgae cells were evaluated using flow cytometry and optical microscopy. CdS and ZnS NPs demonstrated similar level of general toxicity and growth-rate inhibition to all used microalgae species, except the red algae P. purpureum. More specifically, CdS NPs caused higher inhibition of growth rate for C. muelleri and P. purpureum, while ZnS NPs were more toxic for A. ussuriensis and H. akashiwo species. Our findings suggest that the sensitivity of different microalgae species to CdS and ZnS NPs depends on the chemical composition of NPs and their ability to interact with the components of microalgal cell-wall. The red microalga was highly resistant to ZnS NPs most likely due to the presence of phycoerythrin proteins in the outer membrane bound Zn2+ cations defending their cells from further toxic influence. The treatment with CdS NPs caused morphological changes and biochemical disorder in all tested microalgae species. The toxicity of CdS NPs is based on their higher photoactivity under visible light irradiation and lower dissociation in water, which allows them to generate more reactive oxygen species and create a higher risk of oxidative stress to aquatic organisms. The results of this study contribute to our understanding of the parameters affecting the aquatic toxicity of semiconductor NPs and provide a basis for further investigations.
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Affiliation(s)
- Konstantin Pikula
- Far Eastern Federal University, Vladivostok, 690950, Russian Federation; N.I. Vavilov All-Russian Research Institute of Plant Genetic Resources, Saint Petersburg, 190121, Russian Federation.
| | - Neli Mintcheva
- Research Institute of Science and Technology, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan; Department of Chemistry, University of Mining and Geology, Sofia, 1700, Bulgaria
| | - Sergei A Kulinich
- Far Eastern Federal University, Vladivostok, 690950, Russian Federation; Research Institute of Science and Technology, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan; Department of Mechanical Engineering, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan
| | - Alexander Zakharenko
- Far Eastern Federal University, Vladivostok, 690950, Russian Federation; N.I. Vavilov All-Russian Research Institute of Plant Genetic Resources, Saint Petersburg, 190121, Russian Federation
| | - Zhanna Markina
- Far Eastern Federal University, Vladivostok, 690950, Russian Federation; A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690014, Russian Federation
| | - Vladimir Chaika
- Far Eastern Federal University, Vladivostok, 690950, Russian Federation
| | - Tatiana Orlova
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, 690014, Russian Federation
| | - Yaroslav Mezhuev
- Mendeleev University of Chemical Technology of Russia, Moscow, 125047, Russian Federation
| | - Emmanouil Kokkinakis
- Laboratory of Toxicology, School of Medicine, University of Crete, Heraklion, 71003, Greece
| | - Aristidis Tsatsakis
- Laboratory of Toxicology, School of Medicine, University of Crete, Heraklion, 71003, Greece; I.M. Sechenov First Moscow State Medical University, Moscow, 119048, Russian Federation
| | - Kirill Golokhvast
- Far Eastern Federal University, Vladivostok, 690950, Russian Federation; N.I. Vavilov All-Russian Research Institute of Plant Genetic Resources, Saint Petersburg, 190121, Russian Federation; Pacific Geographical Institute FEB RAS, Vladivostok, 690014, Russian Federation
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