Interpretation of the interaction between cesium ion and some clay minerals based on their structural features

Akemoto, Yasuhiro; Sakti, Satya Candra Wibawa; Kan, Masahiko; Tanaka, Shunitz

doi:10.1007/s11356-020-11476-7

Cited by 19 publications

(7 citation statements)

References 35 publications

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“…The adsorption method is given priority due to its low cost, easy operation and fast response, which is widely regarded as an effective choice for treating OSs-bearing wastewater (Benally et al 2019;Li et al 2019b;Wu et al 2017). Moreover, the traditional adsorption materials, such as activated carbon (Piai et al 2019), sugar cane bagasse (Tahir et al 2016), vegetable fibers (Xu et al 2019), sawdust bed (Gao et al 2018;Khasri and Ahmad 2018), vermiculite (Akemoto et al 2021;Moraes et al 2019), etc. have been put in practical use already.…”

Section: Introductionmentioning

confidence: 99%

Bamboo charcoal fused with polyurethane foam for efficiently removing organic solvents from wastewater: experimental and simulation

Wang

Zhao

et al. 2022

Biochar

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The development of a multifunctional oil adsorbing material which could effectively and quickly separate oily wastewater is one of the focuses in water environment restoration. In this study, bamboo charcoal (BC) was used as an improver to modify polyurethane (PU) foam. The results of scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) revealed that the addition of BC could effectively improve the mechanical properties of PU. The adsorption data exhibited that the BC-loaded PU (BC/PU) foam composites effectively removed seven organic solvents (OSs, including octane, petroleum ether, soybean oil, chlorobenzene, 1,2-dichloroethane, n-hexane, cyclohexane), and the maximum adsorption capacity of BC/PU was 23.6 g g−1 when BC content was 5%. The order of pseudo-second-order kinetic constants and maximum adsorption capacity of seven OSs was octane < petroleum ether < soybean oil < chlorobenzene < 1, 2-dichloroethane < cyclohexane < n-hexane. Based on the experimental data and density functional theory (DFT) simulation, the adsorption mechanism of OSs on BC/PU-5 was discussed. The EHOMO and μ of OSs calculated by DFT were highly correlated with absorption affinity (K2, Qe and Qmax). Hence, the contribution of OSs to the adsorption efficiency of BC/PU-5 may be mainly due to electron donor–acceptor (EDA) interaction and non-hydrophobic interaction. In addition, the adsorption capacity did not change significantly after repeated recycling 5 times. Overall, the prepared BC/PU foam composites could be used as a potential candidate for separating OSs in engineering applications. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Bamboo charcoal fused with polyurethane foam for efficiently removing organic solvents from wastewater: experimental and simulation

Wang

Zhao

et al. 2022

Biochar

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“…By reducing the vermiculite CEC with K xation, it mimics a sequence between true vermiculite and vermiculitized-mica. Consequently, it was expected to increase the FES occurrence by letting available cations stay into the space close to the layer edge (Akemoto et al 2020). High selectivity and low capacity sites are usually assimilated to the FES.…”

Section: Mechanism Of Cs Sorption On Vermiculite and Micaceous Struct...mentioning

confidence: 99%

Multi-cation exchanges involved in cesium and potassium sorption mechanisms on vermiculite and micaceous structures

Dubus

Leonhardt

Latrille

2022

Environ Sci Pollut Res

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Vermiculite and micaceous minerals are relevant Cs sorbent in soils and sediments. To understand Cs bioavailability in soils resulting from multi-cation exchanges, Cs sorption onto clay minerals have been carried out in batch experiments with solutions containing Ca 2+ , Mg 2+ and K + . A sequence between a vermiculite and various micaceous structures were achieved by conditioning a vermiculite at various amounts of K. Competing cation exchanges were investigated according to the concentration of Cs. The contribution of K on trace Cs desorption is probed by applying different concentrations of K on Cs-doped vermiculite and micaceous structures. Cs sorption isotherms at chemical equilibrium were combined with elemental mass balances in solution and structural analyses. Cs replace easily Mg 2+ > Ca 2+ and competes scarcely with K. Cs is strongly adsorbed on the various matrix and a K/Cs ratio about a thousand is required to remobilize Cs. Cs is exchangeable as long as the clay interlayer space remains open to Ca 2+ . However, excess of K, as well as Cs, in solution leads to the collapse of the interlayer spaces that locks the Cs into the structure. Once K and/or Cs collapse the interlayer space, the external sorption sites are then particularly involved in Cs sorption. Subsequently, Cs + exchanges preferentially with Ca 2+ rather than Mg 2+ . Mg 2+ is extruded from the interlayer space by Cs + and K + adsorption, excluded from short interlayer space and replaced by Ca 2+ as Cs + desorbs.

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“…Biotite in Tamura-gun, Fukushima Prefecture, Japan (Geo-Science Materials Nichika Inc., Japan) was used as the model clay mineral. Since the adsorption behavior of Cs + on this biotite was established by the Freundlich adsorption isotherm, the interlayer and surface of biotite acted as adsorption sites for Cs + (Akemoto et al 2021b). For characteristics of biotite used in this study, cation exchange capacity is 380 mmol/kg and chemical component is shown in Table S1.…”

Section: Clay Mineral and Reagentsmentioning

confidence: 99%

“…The Cs + contaminated biotite was prepared as described in a previous study (Akemoto et al 2021b). The particle size of biotite was less than 53 µm and the adsorption capacity of biotite for Cs + was 31.9 mg/g.…”

Section: Desorption Experimentsmentioning

confidence: 99%

“…The main elements of the clay minerals (Al, Fe, Mg, and Si) in the filtrate were measured using inductively coupled plasma-atomic emission spectroscopy (ICP-AES, ICPS-8100, Shimadzu Corporation, Japan). The percentage of these elements (Al, Fe, Mg, and Si) extracted from the initial biotite was calculated based on the results of energy-dispersive X-ray fluorescence spectrometry (XRF, JSX-3100RII, JEOL Ltd., Japan) (Akemoto et al 2021b). The solution pH was measured using a pH meter (D-51, Horiba Ltd., Japan).…”

Section: Desorption Efficiency (mentioning

confidence: 99%

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Extraction of Cs bound with biotite by addition of oxalic acid without heating

et al. 2022

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There is a large quantity of contaminated soil with radionuclides due to the accident of Fukushima Daiichi Nuclear Power Plant in Japan. Some previous studies reported that Cs + could be desorbed from soil with high efficiency, however, these methods required huge input energy for operating. Therefore, we focused on oxalic acid, which has shown relatively high desorption efficiency in previous thermal treatment, and evaluated the potential of oxalic acid as a leaching reagent to reduce the volume of contaminated soil without heating. MethodsStable isotope Cs + contaminated biotite was retained in plastic bag for 3 months for aging. Oxalic acid was added to the contaminated biotite and the mixture was maintained around 20 °C. After each leaching time, the mixture was separated using filter paper and the concentration of Cs + in filtrate was measured. Structural changes in biotite before and after leaching were also analyzed. LiNO3 was also used for comparison studies. ResultsThe desorption efficiency of Cs + from biotite by leaching with oxalic acid was 94.9% after 2 weeks and the intensity of the specific reflection for biotite in the X-ray diffractograms decreased with leaching time.These results indicate that oxalic acid can remove Cs + from biotite through the decomposition of the biotite structure. Since LiNO3 desorbed only 32.2% of Cs + as ion-exchangeable form after 2 weeks, oxalic acid can desorb Cs + , which has a strong interaction with biotite such as the inner-sphere complex, without heating. ConclusionAlthough the desorption of Cs + from biotite by leaching with oxalic acid leaching takes a long time, it is a great advantage that this leaching method does not require external energy such as heating. Therefore, oxalic acid leaching has high potential to reduce the volume of contaminated soil with radionuclides.

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Interpretation of the interaction between cesium ion and some clay minerals based on their structural features

Cited by 19 publications

References 35 publications

Bamboo charcoal fused with polyurethane foam for efficiently removing organic solvents from wastewater: experimental and simulation

Bamboo charcoal fused with polyurethane foam for efficiently removing organic solvents from wastewater: experimental and simulation

Multi-cation exchanges involved in cesium and potassium sorption mechanisms on vermiculite and micaceous structures

Extraction of Cs bound with biotite by addition of oxalic acid without heating

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