An application for nonlinear heterogeneity-based isotherm models in characterization of niobium sorption on clay rocks and granite
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Shih-Chin Tsai
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Pei-Tung Hsueh
Abstract
The nonlinear heterogeneous adsorption behaviors of niobium (Nb) on clay rocks (bentonite and argillite) and granite in synthetic groundwater and seawater systems were evaluated by adsorption experiments, applying two heterogeneity-based isotherm models: the Langmuir–Freundlich (LF) and generalized-Freundlich (GF) models. According to the root mean square error (RMSE) between the experimental results and numerical simulation, the two heterogeneous sorption models (LF and GF), which correspond to a different heterogenous constant (β), were more adequate than Langmuir models for characterizing the Nb adsorption mechanism. The fitting results demonstrated that the sorption of Nb on granite, bentonite, and argillite exhibited a different adsorption affinity spectrum as a result of the heterogeneous mineral surface. Consequently, the Nb sorption capacity of bentonite and argillite was higher than that of granite and was estimated at 9.24E-01 mmol/g for bentonite, 8.44E-01 mmol/g for argillite, and 2.33E-02 mol/kg for granite.
Funding source: Ministry of Science and Technology, Taiwan
Award Identifier / Grant number: 108-2623-E-007-001-NU
Award Identifier / Grant number: 109-2622-E-007-016-CC3
Award Identifier / Grant number: 109-2623-E-007-011-NU
Funding source: National Synchrotron Radiation Research Center
Award Identifier / Grant number: 2022-1-126-3
Acknowledgments
The experimental and instrumental analyses of this study were supported by the Instrumentation Center at the National Tsing Hua University, and XRD was conducted at the National Synchrotron Radiation Research Center (NSRRC) in Taiwan under contract number 2022-1-126-3. Finally, we thank Dr. Jey-Jau Lee and Dr. Ting-Shan Chan for their professional and technical support for our experiments at the NSRRC.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: This project was mainly supported by the Ministry of Science and Technology (MOST, Taiwan R.O.C) and the Atomic Energy Council (AEC, Taiwan R.O.C) through a mutual fund program under contract numbers 109-2623-E-007-011-NU, 109-2622-E-007-016-CC3, and 108-2623-E-007-001-NU.
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Data availability: Not applicable.
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Articles in the same Issue
- Frontmatter
- CFD modeling of natural convection in pebble bed geometry with finite volume method
- Experimental investigation of heat transfer characteristics of inclined aluminium two phase closed thermosyphon
- Advances in triple tube heat exchangers regarding heat transfer characteristics of single and two-phase flows in comparison to double tube heat exchangers part 1
- Advances in triple tube heat exchangers regarding heat transfer characteristics of single and two-phase flows in comparison to double tube heat exchangers part 2
- Neutronic and thermal-hydraulic assessment of the TRR with new core designed based on tubular fuels
- A non-dominated discrete differential evolution for fuel loading pattern optimization of a nuclear research reactor
- CFD and machine learning based hybrid model for passive dilution of helium in a top ventilated compartment
- Optimization strategy for SAM in nuclear power plants based on NSGA-II
- Probing 6He induced reactions with nuclear level density
- An application for nonlinear heterogeneity-based isotherm models in characterization of niobium sorption on clay rocks and granite
- Calendar of events
