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Lin X, Song MH, Li W, Wei W, Wu X, Mao J, Yun YS. Optimized design of quaternary amino-functionalized chitosan fibers for ultra-high diclofenac adsorption from wastewater. Chemosphere 2024; 357:141970. [PMID: 38608776 DOI: 10.1016/j.chemosphere.2024.141970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/19/2024] [Accepted: 04/08/2024] [Indexed: 04/14/2024]
Abstract
The extraction of non-steroidal anti-inflammatory drugs (NSAIDs) from water bodies is imperative due to the potential harm to humans and the ecosystem caused by NSAID-contaminated water. Quaternary amino-functionalized epichlorohydrin cross-linked chitosan fibers (QECFs), an economical and eco-friendly adsorbent, were successfully prepared using a simple and gentle method for efficient diclofenac (DCF) adsorption. Additionally, the optimized factors for the preparation of QECFs included epichlorohydrin concentration, pH, temperature, and (3-chloro-2-hydroxypropyl) trimethylammonium chloride (CHTAC) concentration. QECFs demonstrated excellent adsorption performance for DCF across a broad pH range of 7-12. The calculated maximum adsorption capacity and the amount of adsorbed DCF per adsorption site were determined to be 987.5 ± 20.1 mg/g and 1.2 ± 0.2, respectively, according to the D-R and Hill isotherm models, at pH 7 within 180 min. This performance surpassed that of previously reported adsorbents. The regeneration of QECFs could be achieved using a 0.5 mol/L NaOH solution within 90 min, with QECFs retaining their original fiber form and experiencing only a 9.18% reduction in adsorption capacity after 5 cycles. The Fourier transform infrared spectrometer and X-ray photoelectron spectroscopy were used to study the characterization of QECFs, the preparation mechanism of QECFs, and the adsorption mechanism of DCF by QECFs. Quaternary ammonium groups (R4N+) were well developed in QECFs through the reaction between amino/hydroxyl groups on chitosan and CHTAC, and approximately 0.98 CHTAC molecule with 0.98 R4N+ group were immobilized on each chitosan monomer. Additionally, these R4N+ on QECFs played a crucial role in the removal of DCF.
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Affiliation(s)
- Xiaoyu Lin
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Myung-Hee Song
- School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Wenhao Li
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Wei Wei
- School of Geographic Sciences, Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Nanhu Road 237, Xinyang, 464000, China
| | - Xiaohui Wu
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Juan Mao
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Jeonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea.
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Cho BG, Lee KY, Mun SB, Lim CR, Yun YS, Cho CW. Adsorptive removal of micropollutants by natural and faujasite zeolites: Structural effect of micropollutants on adsorption. Ecotoxicol Environ Saf 2024; 270:115869. [PMID: 38141338 DOI: 10.1016/j.ecoenv.2023.115869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/16/2023] [Accepted: 12/19/2023] [Indexed: 12/25/2023]
Abstract
To effectively characterize natural zeolite powder (ZP) and faujasite zeolite (FAU) as adsorbents to remove a wide variety of organic micropollutants, quantitative structure-activity relationship (QSAR) models for the adsorption of zeolites were developed. For this purpose, batch isotherms were performed to measure the adsorption affinity (Kd) between zeolite and organic micropollutants, and the measured Kd values were used as a dependent variable in the QSAR modeling. In the modeling, the concept of a linear free energy relationship (LFER) was employed and used either empirically measured or in silico calculated descriptors. Modeling results based on empirical descriptors showed that log Kd values for ZP could be predicted with R2 = 0.949 and standard error (SE) = 0.137 log units, and for FAU, R2 = 0.895 and SE = 0.144 log units. A test set was used to validate the models developed by the training set. The predictabilities of the models for the test set were R2 = 0.907 and SE = 0.209 log units for ZP and R2 = 0.784 and SE = 0.236 log units for FAU, indicating that the models have reasonable robustness and predictability. Also, we showed that in silico-based descriptors could be applied to the prediction. These findings may help determine the general coverage of ZP and FAU zeolites and identify suitable applications.
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Affiliation(s)
- Bo-Gyeon Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, Gwangju 61186, Republic of Korea
| | - Kwan-Yong Lee
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, Gwangju 61186, Republic of Korea
| | - Se-Been Mun
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, Gwangju 61186, Republic of Korea
| | - Che-Ryung Lim
- School of Chemical Engineering, Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea.
| | - Chul-Woong Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, Gwangju 61186, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 61186, Republic of Korea.
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Yoon SI, Han M, Chaudhuri H, Yun YS. High-capacity/high-rate hybrid column for high-performance ion exchange. Environ Res 2023; 228:115882. [PMID: 37060991 DOI: 10.1016/j.envres.2023.115882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/27/2023] [Accepted: 04/09/2023] [Indexed: 05/16/2023]
Abstract
Herein, a fixed-bed high-capacity/high-rate (HC/HR) hybrid column was developed using commercial ion-exchange beads (IEBs) and ion-exchange fibers (IEFs). The as-fabricated HC/HR hybrid column exhibited excellent breakthrough bed volume (BV) and utilization efficiency of capacity (UEC) at a high service flow rate (SFR) for the adsorption of Cd(II). The IEBs displayed a high adsorption capacity of 235.2 ± 9.8 mg g-1 and slow adsorption kinetics (k2 = 0.0001 g mg-1 min-1) for the sorption of Cd(II); meanwhile, the IEFs showed a maximum adsorption capacity of only 146.3 ± 7.5 mg g-1, which is lower than that of the IEBs, but fast kinetics (k2 = 0.0130 g mg-1 min-1). At an SFR of 104.23 BV h-1, the HC/HR hybrid column showed excellent performance for the sorption of Cd(II), having a high breakthrough BV of 1009.11 and a UEC of 92.86%; these values are much higher than those of the IEB-packed column. Furthermore, at an increased SFR (318.47 BV h-1), the HC/HR hybrid column maintained its high performance, demonstrating a breakthrough BV of 568.80 and UEC of 83.90%. The regeneration experiment indicates that 97% of the initial capacity was retained. Thus, the HC/HR hybrid column could easily be applied to existing column systems and shows promising performance in ion-exchange processes.
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Affiliation(s)
- Sung Il Yoon
- School of Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Minhee Han
- School of Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Haribandhu Chaudhuri
- School of Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea.
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 54896, Republic of Korea.
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Chaudhuri H, Lin X, Yun YS. Graphene oxide-based dendritic adsorbent for the excellent capturing of platinum group elements. J Hazard Mater 2023; 451:131206. [PMID: 36931220 DOI: 10.1016/j.jhazmat.2023.131206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 03/08/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
Herein, we report amino functionalized thermally stable graphene oxide-based dendritic adsorbent (GODA) with the highest sorption capacity ever recorded for platinum group elements (PGEs), including platinum (Pt(IV), PtCl62-) and palladium (Pd(II), PdCl42-), from highly acidic aqueous solutions. The GODA was designed and synthesized to have fully ionized amine binding sites and was characterized in detail. The detail batch adsorption experiment along with kinetic, isotherm, and thermodynamic studies were carried out to investigate the adsorption efficacy of GODA. For both Pt(IV) and Pd(II), the experimental data are more accurately fitted with the pseudo-second-order and the intraparticle diffusion kinetic models and Langmuir isotherm model as compared to the pseudo-first-order kinetic model and Freundlich and Temkin isotherm models, respectively. The material showed the highest ever adsorption capacities of 827.8 ± 27.7 mg/g (4.24 ± 0.00 mmol/g) and 890.7 ± 29.1 mg/g (8.37 ± 0.00 mmol/g) for Pt(IV) and Pd(II), respectively, at pH 1. The adsorption equilibriums were achieved within 70 min and 65 min for Pt(IV) and Pd(II), respectively. The thermodynamic parameters indicate that the adsorptions of both metals are spontaneous. The binding mechanisms are considered to be electrostatic interactions, hydrogen bonding, cationic-π bonding, and surface complexation between the sorbent and the sorbates. Furthermore, the as-prepared GODA exhibited high thermal stability and significant acid-resistance at pH 1. The GODA demonstrated excellent regeneration and reusability for Pt(IV) and Pd(II) over five adsorption/desorption cycles, indicating its excellence in practical applications.
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Affiliation(s)
- Haribandhu Chaudhuri
- School of Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Xiaoyu Lin
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 54896, Republic of Korea; Division of Semiconductor and Chemical Engineering, Jeonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 54896, Republic of Korea.
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Cho BG, Lee JH, Kim HI, Mun SB, Jin SR, Kim DG, Cho CW, Yun YS. Modeling for the estimating the adsorption property of fruit waste-based biosorbents for the removal of organic micropollutants. Environ Res 2023; 225:115593. [PMID: 36863649 DOI: 10.1016/j.envres.2023.115593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/25/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
The enormous production of fruit waste and the generation of countless organic micropollutants are serious environmental problems. To solve the problems, the biowastes, i.e., orange, mandarin, and banana peels, were used as biosorbents to remove the organic pollutants. In this application, the difficult challenge is knowing the degree of adsorption affinity of biomass for each type of micropollutant. However, since there are numerous micropollutants, it requires enormous material consumption and labor to physically estimate the adsorbability of biomass. To address this limitation, quantitative structure-adsorption relationship (QSAR) models for the adsorption assessment were established. In this process, the surface properties of each adsorbent were measured with instrumental analyzers, their adsorption affinity values for several organic micropollutants were determined through isotherm experiments, and QSAR models for each adsorbent were developed. The results showed that the tested adsorbents had significant adsorption affinity for cationic and neutral micropollutants, while the anionic one had low adsorption. As a result of the modeling, it was found that the adsorption could be predicted for a modeling set with an R2 of 0.90-0.915, and the models were validated via the prediction of a test set that was not included in the modeling set. Also, using the models, the adsorption mechanisms were identified. It is speculated that these developed models can be used to rapidly estimate adsorption affinity values for other micropollutants.
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Affiliation(s)
- Bo-Gyeon Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea
| | - Jae-Ho Lee
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea
| | - Hye-In Kim
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, South Korea
| | - Se-Been Mun
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea
| | - Se-Ra Jin
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea
| | - Dae Geun Kim
- LED Agri-bio Fusion Technology Research Center, Jeonbuk National University, 79 Gobong-ro, Iksan-si, Jeollabuk-do, 54596, Republic of Korea
| | - Chul-Woong Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, South Korea.
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, Jeonbuk, 561-756, South Korea.
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Mun SB, Cho BG, Jin SR, Lim CR, Yun YS, Cho CW. Adsorption of organic micropollutants on yeast: Batch experiment and modeling. J Environ Manage 2023; 334:117507. [PMID: 36809737 DOI: 10.1016/j.jenvman.2023.117507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 01/31/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Yeast is ubiquitous and may act as a solid phase in natural aquatic systems, which may affect the distribution of organic micropollutants (OMs). Therefore, it is important to understand the adsorption of OMs on yeast. Therefore, in this study, a predictive model for the adsorption values of OMs on the yeast was developed. For that, an isotherm experiment was performed to estimate the adsorption affinity of OMs on yeast (i.e., Saccharomyces cerevisiae). Afterwards, quantitative structure-activity relationship (QSAR) modeling was performed for the purpose of developing a prediction model and explaining the adsorption mechanism. For the modeling, empirical and in silico linear free energy relationship (LFER) descriptors were applied. The isotherm results showed that yeast adsorbs a wide range of OMs, but the magnitude of Kd strongly depends on the types of OMs. The measured log Kd values of the tested OMs ranged from -1.91 to 1.1. Additionally, it was confirmed that the Kd measured in distilled water is comparable to that measured in real anaerobic or aerobic wastewater (R2 = 0.79). In QSAR modeling, the Kd value could be predicted by the LFER concept with an R2 of 0.867 by empirical descriptors and an R2 of 0.796 by in silico descriptors. The adsorption mechanisms of yeast for OMs were identified in individual correlations between log Kd and each descriptor: Dispersive interaction, hydrophobicity, hydrogen-bond donor, and cationic Coulombic interaction of OMs attract the adsorption, while the hydrogen-bond acceptor and anionic Coulombic interaction of OMs act as repulsive forces. The developed model can be used as an efficient method to estimate OM adsorption to yeast at a low level of concentration.
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Affiliation(s)
- Se-Been Mun
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186 Gwangju, Republic of Korea
| | - Bo-Gyeon Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186 Gwangju, Republic of Korea
| | - Se-Ra Jin
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186 Gwangju, Republic of Korea
| | - Che-Ryong Lim
- School of Chemical Engineering Jeonbuk National University 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering Jeonbuk National University 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea.
| | - Chul-Woong Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186 Gwangju, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, South Korea.
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Zhao Y, Wu G, Wei W, Song MH, Cho CW, Yun YS. Adsorption of ionic and neutral pharmaceuticals and endocrine-disrupting chemicals on activated carbon fiber: batch isotherm and modeling studies. Chemosphere 2023; 319:138042. [PMID: 36736835 DOI: 10.1016/j.chemosphere.2023.138042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/11/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Activated carbon fiber (ACF) has received increasing attention as an adsorbent due to its excellent surface properties. However, the adsorption mechanism of ACF for micropollutants, especially those in ionic forms, has not been sufficiently characterized to date. Therefore, the adsorption property of ACF was characterized using isotherm experiments and linear free energy relationship (LFER). For the experiments, adsorption affinities of thirty-five chemicals, i.e., pharmaceuticals and endocrine-disrupting chemicals, on ACF were estimated. Afterward, the adsorption affinities were used as dependent variables to build the LFER modeling. Finally, three isolated models for each chemical species, i.e., cations, anions, and neutrals, and a comprehensive model for the whole dataset were developed. The LFER results revealed that the models for anionic and neutral compounds have high predictabilities in R2 of 0.97 and 0.96, respectively, while that for cations has a slightly lower R2 of 0.72. In the comprehensive model including cationic, anionic, and neutral compounds, the accuracy of it is 0.81. From the developed LFER model based on the whole dataset, the adsorption mechanisms of ACF for the selected substances could be interpreted, in which the terms of hydrophobic interaction, hydrogen bonding basicity, and anionic Coulombic force of the compounds were identified as the predominant interactions with ACF.
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Affiliation(s)
- Yufeng Zhao
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, China
| | - Guiping Wu
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, China
| | - Wei Wei
- Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Nanhu Road 237, Xinyang, 464000, China
| | - Myung-Hee Song
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Jeonbuk National University, Jeonbuk, 54896, South Korea
| | - Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, 61186, South Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Jeonbuk National University, Jeonbuk, 54896, South Korea.
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Kwame Bediako J, Lim CR, Repo E, Choi SH, Yun YS. Polyelectrolyte complex-derived adsorbents capable of selective recovery of precious metal from multiple mixtures. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Chaudhuri H, Yun YS. Synthesis and environmental applications of graphene oxide/layered double hydroxides and graphene oxide/MXenes: A critical review. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Cho CW, Yun YS. In silico prediction and analysis of dielectric constant of ionic liquids. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1096-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cho BG, Mun SB, Lim CR, Kang SB, Cho CW, Yun YS. Adsorption modeling of microcrystalline cellulose for pharmaceutical-based micropollutants. J Hazard Mater 2022; 426:128087. [PMID: 34923381 DOI: 10.1016/j.jhazmat.2021.128087] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/09/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
Cellulose can be considered as a raw material for the production of filters and adsorbents for the removal of micropollutants, particularly in pharmaceutical-based products. To study its applications, it is important to estimate the adsorptive interaction of cellulose with the targeted chemicals, and develop predictive models for the expandable estimation into various types of micropollutants. Therefore, the adsorption affinity between cellulose and micropollutants was measured through isotherm experiments, and a quantitative structure-adsorption relationship model was developed using the linear free energy relationship (LFER) equation. The results indicate that microcrystalline cellulose has a remarkably high adsorption affinity with cationic micropollutants. Moreover, it has interactions with neutral and anionic micropollutants, although they have relatively lower affinities than those of cations. Through a modeling study, an LFER model - comprising of excess molar refraction, polar interaction, molecular volume, and charge-related terms - was developed, which could be used to predict the adsorption affinity values with an R2 of 0.895. To verify the robustness and predictability of the model, internal and external validation studies were performed. The results proved that the model was reasonable and acceptable, with an SE = 0.207 log unit.
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Affiliation(s)
- Bo-Gyeon Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186 Gwangju, South Korea
| | - Se-Been Mun
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186 Gwangju, South Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, South Korea
| | - Che-Ryong Lim
- School of Chemical Engineering, Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
| | - Su Bin Kang
- Department of Ocean System Engineering, College of Marine Science, Gyeoungsang National University, Tongyeong 53064, South Korea
| | - Chul-Woong Cho
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186 Gwangju, South Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, South Korea.
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea.
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Choi JW, Kim J, Kim SK, Yun YS. Simple, green organic acid-based hydrometallurgy for waste-to-energy storage devices: Recovery of NiMnCoC 2O 4 as an electrode material for pseudocapacitor from spent LiNiMnCoO 2 batteries. J Hazard Mater 2022; 424:127481. [PMID: 34666292 DOI: 10.1016/j.jhazmat.2021.127481] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
A simple, green approach to recover NiMnCoC2O4 as an electrode material for high-performance pseudocapacitors from spent LiNiMnCoO2 (NMC) batteries is proposed. Four strategic metals (Li, Ni, Co, and Mn) were leached from spent NMC batteries using several organic acids as model green leachants. Among the various candidates of green leaching agents, 2 M citric acid and 5 wt% glucose were selected as the leachant and reductant, respectively. Microwave irradiation was conducted during the leaching step to maximize the performance of the leaching rate and efficiency. The leaching efficiencies within 0.5 h for Ni(II), Li(I), Mn(II), and Co(II) were 90.7 ± 1.6%, 98.3 ± 2.4%, 94.9 ± 4.3%, and 95.6 ± 1.4%, respectively, and were thus as efficient as using aqua regia leaching. After the leaching process, divalent metal ions, that is, Ni(II), Co(II), and Mn(II), were immediately separated at room temperature using oxalic acid. The recovered samples were not further treated and used directly for energy storage applications. The recovered NiMnCoC2O4⋅nH2O has been demonstrated as a promising electrode for pseudocapacitors, providing a specific capacitance of 1641 F/g, good rate-retention capability (80% of low-current capacitance), and good cycle stability over 4000 charge-discharge cycles.
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Affiliation(s)
- Jong-Won Choi
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, 54896 Jeonju, Republic of Korea
| | - Jisu Kim
- Functional Soft Materials Laboratory, School of Chemical Engineering Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, 54896 Jeonju, Republic of Korea
| | - Sung-Kon Kim
- Functional Soft Materials Laboratory, School of Chemical Engineering Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, 54896 Jeonju, Republic of Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, 54896 Jeonju, Republic of Korea.
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Choi JW, Cho CW, Yun YS. Organic acid-based linear free energy relationship models for green leaching of strategic metals from spent lithium-ion batteries and improvement of leaching performance. J Hazard Mater 2022; 423:127214. [PMID: 34551369 DOI: 10.1016/j.jhazmat.2021.127214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 09/03/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
Water-soluble organic acids (e.g., acetic acid, acrylic acid, and ascorbic acid), as green leachants, have been applied to leach strategic metals (Ni, Li, Mn, and Co) from spent lithium-ion batteries (LIBs). Organic acid-based linear free energy relationship models were developed and simulated to predict the feasibility of the leaching efficiency for each of the strategic metals based on in silico calculated descriptors. The developed models, with accuracy (R2) of 0.747-0.831, reveal that hydrogen bond acidity of organic acids promotes the leaching efficiency, whereas molecular volume or excess molar refraction inhibits the efficiency. Furthermore, toxicity (lethal dose 50%) of organic acids was discussed along with the predicted leaching efficiency to explore more green and efficient organic acids. Considering both toxicity and leaching efficiency, citric acid was selected as a green and efficient leachant. To more improve the leaching performance (rate and efficiency) of citric acid, glucose as a green reductant and microwave treatment were additionally applied. Under the selected conditions, the leaching efficiencies after 1 h for Ni, Li, Mn, and Co were enhanced up to 98.3%, 99.1%, 98.7%, and 97.7%, respectively.
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Affiliation(s)
- Jong-Won Choi
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, 54896 Jeonju, Republic of Korea
| | - Chul-Woong Cho
- Department of Bioenergy, Science, and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 6186, Republic of Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Jeonbuk National University, Beakje-dearo 567, Deokjin-gu, 54896 Jeonju, Republic of Korea.
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14
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Lin X, Tran DT, Song MH, Yun YS. Development of quaternized polyethylenimine-cellulose fibers for fast recovery of Au(CN) 2- in alkaline wastewater: Kinetics, isotherm, and thermodynamic study. J Hazard Mater 2022; 422:126940. [PMID: 34419850 DOI: 10.1016/j.jhazmat.2021.126940] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 07/31/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
The purpose of this study was to fabricate quaternized polyethylenimine-cellulose fibers (QPCFs) for the fast recovery of Au(I) from alkaline e-waste leachate. QPCFs were prepared by quaternizing PEI-modified cellulose fibers using a (3-chloro-2-hydroxypropyl)trimethylammonium chloride solution. The maximum Au(I) adsorption capacity of QPCFs was estimated to be 109.87 ± 3.67 mg/g at pH 9.5 using the Langmuir model. The values of k1 and k2 calculated by the pseudo-first and pseudo-second-order models were 1.79 ± 0.15 min-1 and 0.045 ± 0.003 g/mg min, respectively. Adsorption equilibrium was reached within 5 min. Thermodynamic studies revealed that the Au(I) adsorption process by the QPCFs was spontaneous (ΔG° < 0) and exothermic (ΔH° < 0). The characterization and adsorption mechanism of QPCFs were investigated by Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectrometry. Quaternary amine sites were well developed in the QPCFs. Oxidation or reduction of adsorbed Au(I) was not observed. When QPCFs were applied to the solution obtained by bioleaching of e-waste, the recovery efficiencies of Au and Cu were 61.7 ± 3.1% and 11.1 ± 2.9%, respectively, indicating that QPCFs have Au selectivity. Therefore, QPCFs are suitable for actual wastewater applications because of their high adsorption performance and fast adsorption rate.
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Affiliation(s)
- Xiaoyu Lin
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonju, Jeonbuk 54896, South Korea
| | - Duy Tho Tran
- Department of Bioprocess Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonju, Jeonbuk 54896, South Korea
| | - Myung-Hee Song
- School of Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonju, Jeonbuk 54896, South Korea.
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonju, Jeonbuk 54896, South Korea; Department of Bioprocess Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonju, Jeonbuk 54896, South Korea; School of Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonju, Jeonbuk 54896, South Korea.
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15
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Cho CW, Pham TPT, Zhao Y, Stolte S, Yun YS. Review of the toxic effects of ionic liquids. Sci Total Environ 2021; 786:147309. [PMID: 33975102 DOI: 10.1016/j.scitotenv.2021.147309] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 05/11/2023]
Abstract
Interest in ionic liquids (ILs), called green or designer solvents, has been increasing because of their excellent properties such as thermal stability and low vapor pressure; thus, they can replace harmful organic chemicals and help several industrial fields e.g., energy-storage materials production and biomaterial pretreatment. However, the claim that ILs are green solvents should be carefully considered from an environmental perspective. ILs, given their minimal vapor pressure, may not directly cause atmospheric pollution. However, they have the potential to cause adverse effects if leaked into the environment, for instance if they are spilled due to human mistakes or technical errors. To estimate the risks of ILs, numerous ILs have had their toxicity assessed toward several micro- and macro-organisms over the past few decades. Since the toxic effects of ILs depend on the method of estimating toxicity, it is necessary to briefly summarize and comprehensively discuss the biological effects of ILs according to their structure and toxicity testing levels. This can help simplify our understanding of the toxicity of ILs. Therefore, in this review, we discuss the key findings of toxicological information of ILs, collect some toxicity data of ILs to different species, and explain the influence of IL structure on their toxic properties. In the discussion, we estimated two different sensitivity values of toxicity testing levels depending on the experiment condition, which are theoretical magnitudes of the inherent sensitivity of toxicity testing levels in various conditions and their changes in biological response according to the change in IL structure. Finally, some perspectives, future research directions, and limitations to toxicological research of ILs, presented so far, are discussed.
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Affiliation(s)
- Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, South Korea.
| | - Thi Phuong Thuy Pham
- Faculty of Biotechnology, HoChiMihn University of Food Industry, Ho Chi Minh City, Viet Nam
| | - Yufeng Zhao
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Stefan Stolte
- Technische Universität Dresden, Faculty of Environmental Sciences, Department of Hydrosciences, Institute of Water Chemistry, Bergstraße 66, 01062 Dresden, Germany
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea.
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16
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Dangi YR, Bediako JK, Lin X, Choi JW, Lim CR, Song MH, Han M, Yun YS. Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold. Sci Rep 2021; 11:17836. [PMID: 34497318 PMCID: PMC8426373 DOI: 10.1038/s41598-021-97228-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 08/23/2021] [Indexed: 11/09/2022] Open
Abstract
For the first time, a polyethyleneimine-impregnated alginate capsule (PEIIAC) with a high adsorption capacity is developed for the recovery of monovalent and trivalent gold from an acidic solution. The strategy results in a new type of adsorbent, polyethyleneimine impregnated alginate capsule (PEIIAC) with a core-shell structure having a large number of amine groups as cationic binding site, facilitating maximum uptake of anionic auric chloride. The maximum uptake of PEIIAC was 3078 and 929 mg/g for Au (III) and Au (I), respectively, are recordable compared to other reported adsorbents to date. The as-prepared material was executed to check the sorption efficacy for Au (III) and Au (I) in the pH range of 1-12. With an increment in pH, the uptake capacity for Au (III) increased, while the uptake capacity for Au (I) decreased. The FTIR, XRD, and XPS studies revealed that the gold adsorption mechanism includes ionic interactions and reduction, wherein the amine, hydroxyl, and carboxyl groups are involved. The capsule showed a higher adsorption efficiency than other reported sorbents, making the material applicable in acidic solutions for the recovery of Au (I) and Au (III).
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Affiliation(s)
- Yub Raj Dangi
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea.,Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal
| | - John Kwame Bediako
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea.,School of Engineering Sciences, University of Ghana, Legon, Ghana
| | - Xiaoyu Lin
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea
| | - Jong-Won Choi
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea
| | - Che-Ryong Lim
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea
| | - Myung-Hee Song
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea
| | - Minhee Han
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 54896, South Korea.
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Zhao Y, Tang H, Wang D, Song MH, Cho CW, Yun YS. Predicting adsorption of micropollutants on non-functionalized and functionalized multi-walled carbon nanotubes: Experimental study and LFER modeling. J Hazard Mater 2021; 411:125124. [PMID: 33858098 DOI: 10.1016/j.jhazmat.2021.125124] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/21/2020] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
It is of great importance to predict the adsorption of micropollutants onto CNTs, which is not only useful for exploring their potential adsorbent applications, but also helpful for better understanding their fate and risks in aquatic environments. This study experimentally examined the adsorption affinities of thirty-one micropollutants on four multi-walled CNTs (MWCNTs) with different functional groups (non-functionalized, -COOH, -OH, and -NH2). The properties of each adsorbent were predicted based on the linear free energy relationship (LFER) model. The experimental results showed that MWCNTs-COOH has remarkable adsorption affinities for positively charged compounds (1.996-3.203 log unit), whereas MWCNTs-NH2 has high adsorption affinities for negatively charged compounds (1.360-3.073 log unit). Regarding neutral compounds, there was no significant difference in adsorption affinities of all types of CNTs. According to modeling results, the adsorption affinity can be accurately predicted using LFER models with R2 in the range of 0.81-0.91. Based on the developed models, the adsorption mechanism and contribution of individual intermolecular interactions to the overall adsorption were interpreted. For non-functionalized MWCNTs, molecular interactions induced by molecular volume and H-bonding basicity predominantly contribute to adsorption, whereas for functionalized MWCNTs, the Coulombic interaction due to the charges is an important factor.
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Affiliation(s)
- Yufeng Zhao
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Heqing Tang
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Dongfang Wang
- Hubei Academy of Environmental Sciences, Wuhan 430072, China
| | - Myung-Hee Song
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 54896, Republic of Korea.
| | - Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186 Republic of Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 54896, Republic of Korea.
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18
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Lin S, Wei W, Lin X, Bediako JK, Kumar Reddy DH, Song MH, Yun YS. Pd(II)-Imprinted Chitosan Adsorbent for Selective Adsorption of Pd(II): Optimizing the Imprinting Process through Box-Behnken Experimental Design. ACS Omega 2021; 6:13057-13065. [PMID: 34056455 PMCID: PMC8158805 DOI: 10.1021/acsomega.1c00685] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
The ion/molecular imprinting technique is an efficient method for developing materials with high adsorption selectivity. However, it is still difficult to obtain an imprinted adsorbent with desirably high selectivity when the preparation processes are not well designed and optimized. In this present work, a chitosan-based ion-imprinted adsorbent was optimally prepared through Box-Behnken experimental design to achieve desirably high selectivity for Pd anions (PdCl4 2-) from aqueous solutions with high acidity. The dosage of epichlorohydrin (ECH) used in the first and second steps of cross-linking as well as the pH of the imprinting reaction medium is likely one of the key factors affecting the selectivity of the synthesized ion-imprinted chitosan adsorbent, which were selected as factors in a three-level factorial Box-Behnken design. As a result, the effects of these three factors on Pd(II) selectivity were able to be described by using a second-order polynomial model with a high regression coefficient (R 2; 0.996). The obtained optimal conditions via the response surface methodology were 0.10% (v/v) of first cross-linking ECH, an imprinting pH of 1.0, and 1.00% of second cross-linking ECH. Competitive adsorption was performed to investigate the selectivities of the ion-imprinted chitosan adsorbents prepared under the optimal conditions. The selectivity coefficient of Pd(II) versus Pt(IV) (βPd/Pt) of the Pd(II)-imprinted adsorbent was 115.83, much greater than that of the chitosan adsorbent without imprinting and various reported selective adsorbents. Therefore, the Box-Behnken design can be a useful method for optimizing the synthesis of ion-imprinted adsorbents with desirably high adsorptive selectivity for precious metals.
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Affiliation(s)
- Shuo Lin
- School
of Chemical Engineering, Jeonbuk National
University, Jeonbuk 54896, Republic of Korea
- Department
of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Wei Wei
- School
of Chemical Engineering, Jeonbuk National
University, Jeonbuk 54896, Republic of Korea
- Key
Laboratory for Synergistic Prevention of Water and Soil Environmental
Pollution, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Xiaoyu Lin
- School
of Chemical Engineering, Jeonbuk National
University, Jeonbuk 54896, Republic of Korea
| | - John Kwame Bediako
- School
of Chemical Engineering, Jeonbuk National
University, Jeonbuk 54896, Republic of Korea
| | | | - Myung-Hee Song
- School
of Chemical Engineering, Jeonbuk National
University, Jeonbuk 54896, Republic of Korea
| | - Yeoung-Sang Yun
- School
of Chemical Engineering, Jeonbuk National
University, Jeonbuk 54896, Republic of Korea
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19
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Lim CR, Choi JW, Yun YS, Cho CW. Selection of low-toxic and highly efficient ionic liquids for the separation of palladium and platinum in acidic solution, and prediction of the metal affinity of ionic liquids. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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20
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Bediako JK, Choi JW, Song MH, Lim CR, Yun YS. Self-coagulating polyelectrolyte complexes for target-tunable adsorption and separation of metal ions. J Hazard Mater 2021; 401:123352. [PMID: 32659579 DOI: 10.1016/j.jhazmat.2020.123352] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 06/10/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
Metal-containing wastes in aquatic environments lead to public health hazards and valuable resource lose. Metal-bearing wastewater must be treated to remove heavy metals or recover precious metals. To achieve these, target-tunable adsorbents that bind cationic and anionic metal species were developed through facile polyelectrolyte complexation using polyethylenimine (PEI) and polyacrylic acid (PAA). Utilizing the properties of the two polyelectrolytes and pKa variabilities, stable tunable adsorbents were fabricated in water without additional solvents. The homogenous complex adsorbents were strategically synthesized via dissolution in 0.1 M NaOH and drop-wise addition of 1 M HCl, followed by crosslinking with glutaraldehyde. Consequently, the adsorbents in alternating weight ratios of 4:1 and 1:4 (PEI:PAA) exhibited good tunability and adsorption properties. The maximum single metal adsorption capacities were 1609.7 ± 49.6 and 558.6 ± 9.67 mg/g for gold and cadmium, respectively. The pseudo-second-order model fitted the kinetics data more appropriately and was recognized as the rate controlling step. In a binary mixture, gold selectivity was observed to be influenced by adsorption-reduction mechanism, which was elucidated by XRD and XPS. Moreover, the adsorbents demonstrated NO3- sequestration properties, a feat deemed important for environmental remediation of nitrate ions. Finally, sequential separation was achieved with ethylenediaminetetraacetic acid (EDTA) and acidified thiourea.
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Affiliation(s)
- John Kwame Bediako
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 561-756, Republic of Korea; School of Engineering Sciences, University of Ghana, Legon, Ghana
| | - Jong-Won Choi
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Myung-Hee Song
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Che-Ryong Lim
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (Formerly Chonbuk National University), Jeonju, Jeonbuk, 561-756, Republic of Korea.
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21
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Choi JW, Bediako JK, Kang JH, Lim CR, Dangi YR, Kim HJ, Cho CW, Yun YS. In-situ microwave-assisted leaching and selective separation of Au(III) from waste printed circuit boards in biphasic aqua regia-ionic liquid systems. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117649] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Cho CW, Zhao Y, Choi JW, Kim JA, Bediako JK, Lin S, Song MH, Yun YS. Prediction of organic pollutant removal using Corynebacterium glutamicum fermentation waste. Environ Res 2021; 192:110271. [PMID: 33002506 DOI: 10.1016/j.envres.2020.110271] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
The disposal of bio-waste (e.g., Corynebacterium glutamicum) produced by the fermentation industry is a serious problem and has a negative impact on economic returns. Some fermentation waste can be recycled as livestock feed, but much cannot be used. Therefore, other recycling methods must be developed to increase its applications, for example, as an environmentally friendly adsorbent for the removal or recovery of chemicals. To broaden its application as an adsorbent, we carried out comprehensive experimental and theoretical analysis. From the experiments, adsorption affinity values between C. glutamicum and micropollutants were measured, and, based on the experimental values, we developed a predictive model. The experimental results reveal that the degree of adsorption is dependent on the structural properties of the micropollutants. In particular, the adsorbent has remarkable adsorption ability toward cations, whereas anionic and neutral compounds interact weakly with the adsorbent. In addition, we found that adsorption is affected by the sodium chloride concentration. Briefly, an increase in salt concentration increases the adsorption of anions, whereas the opposite behavior is observed for cations. In contrast, the adsorption of neutral compounds was not affected by the presence of salt. The modeling studies revealed that a linear free energy relationship model can be used to predict the adsorption affinity. Based on the developed model, we found that hydrogen-bond basicity, anionic coulombic interactions, and molecular volume are the main contributing factors to the adsorption model. However, to achieve the best predictability (a coefficient of determination (R2) of 0.902), additional parameters, such as the dipolarity/polarizability and dispersive interaction, should be included. This indicates that adsorption is a product of complex interactions.
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Affiliation(s)
- Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea
| | - Yufeng Zhao
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei Province, China
| | - Jong-Won Choi
- School of Chemical Engineering, Jeonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | - Jeong-Ae Kim
- School of Chemical Engineering, Jeonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | | | - Shuo Lin
- School of Chemical Engineering, Jeonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | - Myung-Hee Song
- School of Chemical Engineering, Jeonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Jeonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea.
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23
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Choi JW, Song MH, Bediako JK, Yun YS. Sequential recovery of gold and copper from bioleached wastewater using ion exchange resins. Environ Pollut 2020; 266:115167. [PMID: 32688197 DOI: 10.1016/j.envpol.2020.115167] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 06/08/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
Numerous studies have sought to address the extraction of metals from printed circuit boards by employing bioleaching process. However, separation and recovery of the bioleached metals have always been a bottleneck. Herein, we demonstrate effective recovery of bioleached Au and Cu via selective separation using ion exchange resins. pH-edge experiments revealed high affinity of Amberjet™ 4200 resin towards Au (adsorption capacity > 98%) over the entire pH range from pH 2-10, whereas Amberlite IRC-86 resin recorded very high Cu adsorption at around pH 5. Therefore, a two-step sequential process was designed for the effective separation and recovery of Au and Cu. In the 1st step, Au was completely recovered by using the Amberjet™ 4200 at the natural pH of 7.5. Subsequently, the Au-free solution was adjusted to pH 5 and Cu was recovered by using Amberlite IRC-86 (2nd step). Consequently, 98.7% Au and 78.9% Cu were successfully recovered. Therefore, this study provides a technical guideline for the selective recovery of Au and Cu from bioleached wastewater, which promotes effective waste minimization and efficient resource recovery.
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Affiliation(s)
- Jong-Won Choi
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonbuk, Republic of Korea
| | - Myung-Hee Song
- School of Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonbuk, Republic of Korea
| | - John Kwame Bediako
- Hongik University Research Institute of Science and Technology (HiRIST), Seoul, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonbuk, Republic of Korea; School of Chemical Engineering, Jeonbuk National University (formerly Chonbuk National University), Jeonbuk, Republic of Korea.
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24
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Kim N, Seo JH, Yun YS, Park D. New insight into continuous recirculation-process for treating arsenate using bacterial biosorbent. Bioresour Technol 2020; 316:123961. [PMID: 32795871 DOI: 10.1016/j.biortech.2020.123961] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 07/29/2020] [Accepted: 08/02/2020] [Indexed: 06/11/2023]
Abstract
In this study, a new recirculation column reactor system for arsenate removal using a polyethylenimine coated bacterial biosorbent was developed. Solution pH was the most important factor in process design and operation. In order to control and optimize solution pH favorable for arsenate removal, a pH control and recirculation system was added to a column reactor. The effects of recycle ratio, initial arsenate concentration, and flow rate on the arsenate removal performance of the developed process were examined. Thomas and Yoon-Nelson models were used to interpret the breakthrough curve of arsenate removal. The maximum arsenate adsorption amount of the new reactor was determined to be 50.86 mg/g by the Thomas model. Importantly, the new reactor showed unimpeded adsorption performance compared with that in the batch experiments. The desorption study also showed excellent reusability. The results indicated that the newly developed process could be a promising application prospect for removing arsenate.
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Affiliation(s)
- Namgyu Kim
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju 26493, Republic of Korea
| | - Ji Hae Seo
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju 26493, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Jeounju 54896, Republic of Korea
| | - Donghee Park
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju 26493, Republic of Korea.
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Bediako JK, Choi JW, Song MH, Zhao Y, Lin S, Sarkar AK, Cho CW, Yun YS. Recovery of gold via adsorption-incineration techniques using banana peel and its derivatives: Selectivity and mechanisms. Waste Manag 2020; 113:225-235. [PMID: 32535374 DOI: 10.1016/j.wasman.2020.05.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 05/12/2020] [Accepted: 05/31/2020] [Indexed: 06/11/2023]
Abstract
In this study, banana peel (BP) and its derivatives after sequential extraction of biochemical components were evaluated for selective recovery of gold. In-depth instrumental characterizations including XPS, FTIR, XRD and HR-TEM were performed to understand the adsorption mechanisms. The biomass after lipid extraction, BP-L, demonstrated very good affinity and selectivity towards gold. In multi-metal systems containing 100 mg/L of Pt(IV), Au(III), Pd(II), Zn(II), Co(II), Ni(II) and Li(I), the selectivity coefficient increased from 978.45 in BP to 2034.70 in BP-L. Moreover, the equilibrium gold uptake was improved and reached 475.48 ± 3.08 mg/g owing to reduction-coupled adsorption mechanisms. The BP-L also showed improved gold nanoparticle formation properties that were pH-dependent. In a strategic adsorption-combined incineration process, metallic gold reaching 99.96% in purity was obtained. The BP and its derivative, BP-L have thus shown potentials for multiple applications in the areas of precious metal recovery and nanoscience.
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Affiliation(s)
- John Kwame Bediako
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea; School of Engineering Sciences, University of Ghana, Legon, Ghana
| | - Jong-Won Choi
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Myung-Hee Song
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Yufeng Zhao
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Shuo Lin
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Amit Kumar Sarkar
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Chul-Woong Cho
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea.
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Choi JW, Bediako JK, Zhao Y, Lin S, Sarkar AK, Han M, Song MH, Cho CW, Yun YS. Adsorptive removal of cationic tricyclic antidepressants using cation-exchange resin. Environ Sci Pollut Res Int 2020; 27:24760-24771. [PMID: 31925694 DOI: 10.1007/s11356-019-06549-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 09/16/2019] [Indexed: 06/10/2023]
Abstract
This study aimed to select a high-performance cation-exchange resin (CER) and estimate its uptake of positively ionized tricyclic antidepressants (TCAs), i.e., amitriptyline (AMI), imipramine (IMI), clomipramine (CLO), and desipramine (DES), which are frequently used, and detected in wastewater treatment systems. For the selection of the resin, the one-point check test of AMI in distilled water was examined using several CERs. As a result, the strong-acid polystyrene CER, Dowex 50WX4-200, was selected on the basis of its outstanding uptake of AMI. The maximum adsorption capacities of Dowex 50WX4-200 for removal of the TCAs ranged from 2.53 ± 0.20 mmol/g to 3.76 ± 0.12 mmol/g, which are significantly higher when compared with those of previously reported adsorbents. This is likely because the combination of electrostatic and π-π interactions between the TCAs and Dowex 50WX4-200 may lead to high uptakes of the TCAs. Additionally, the removal efficiency of DES as a representative of the TCAs was tested in actual wastewater system containing activated sludge and miscellaneous cations. Consequently, the removal efficiencies of the DES in distilled water, aerobic wastewater, and filtered wastewater were 95.68%, 77.99%, and 56.66%, respectively. It is interesting to note that the activated sludge could also contribute to adsorption of the DES, leading to increased removability, while the cations present in the wastewater acted as competing ions, decreasing the removal efficiency.
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Affiliation(s)
- Jong-Won Choi
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - John Kwame Bediako
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Yufeng Zhao
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Shuo Lin
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Amit Kumar Sarkar
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Minhee Han
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Myung-Hee Song
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea
| | - Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Yongbong-ro 77, Buk-gu, Gwangju, 61186, Republic of Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering Chonbuk National University, Beakje-dearo 567, Deokjin-gu, Jeonju, 54896, Republic of Korea.
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Zhao Y, Cho CW, Wang D, Choi JW, Lin S, Yun YS. Simultaneous scavenging of persistent pharmaceuticals with different charges by activated carbon fiber from aqueous environments. Chemosphere 2020; 247:125909. [PMID: 31972492 DOI: 10.1016/j.chemosphere.2020.125909] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 01/06/2020] [Accepted: 01/12/2020] [Indexed: 06/10/2023]
Abstract
The adsorptive removal possibility of persistent pharmaceuticals with different charges by activated carbon fiber (ACF) was examined. The pharmaceuticals tested included carbamazepine (CBZ), propranolol (PRO), and diclofenac (DCF), in neutral, cationic, and anionic forms, respectively, which were frequently detected in sewage. The adsorption characteristics of ACF were identified according to the kinetics, isotherm, pH, and ionic strength experiments. The results revealed that ACF can effectively remove these pharmaceuticals, and the adsorption capacities of CBZ, PRO, and DCF by ACF were 1.27 ± 0.06, 1.07 ± 0.08, and 0.95 ± 0.08 mmol g-1, respectively. Moreover, the adsorption of ACF for CBZ was independent of pH and ionic strength, whereas that of anionic diclofenac decreased at alkaline pHs and high concentrations of NaCl. Using a syringe system packed with ACF mat, the scavenging ability of intermittently generated secondary sewage was evaluated. As a result, the residual concentration of PRO and CBZ could not be even detected after consecutive 10 runs in secondary sewage mixture solution. This indicates ACF has the powerful potential for removing pharmaceutical micropollutants in the actual aqueous solutions. FTIR and XPS analyses showed that hydrophobic and π-π interactions and hydrogen bonding contributed to the adsorption process.
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Affiliation(s)
- Yufeng Zhao
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei Province, China; Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea.
| | - Chul-Woong Cho
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea.
| | - Dongfang Wang
- Hubei Academy of Environmental Sciences, Wuhan, 430072, China.
| | - Jong-Won Choi
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea.
| | - Shuo Lin
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea.
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28
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Lim CR, Lin S, Yun YS. Highly efficient and acid-resistant metal-organic frameworks of MIL-101(Cr)-NH 2 for Pd(II) and Pt(IV) recovery from acidic solutions: Adsorption experiments, spectroscopic analyses, and theoretical computations. J Hazard Mater 2020; 387:121689. [PMID: 31776079 DOI: 10.1016/j.jhazmat.2019.121689] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 10/31/2019] [Accepted: 11/12/2019] [Indexed: 06/10/2023]
Abstract
Cr-based metal-organic frameworks (MOFs) of MIL-101(Cr)-NH2 was post-synthesized from nitro-functionalized MIL-101(Cr) (MIL-101(Cr)-NO2) through a reduction process. Adsorption behaviors and interactions of MIL-101(Cr)-NH2 and MIL-101(Cr)-NO2 with platinum group metal (PGM) anions of Pd(II) (PdCl42-) and Pt(IV) (PtCl62-), were investigated through batch adsorption experiments, spectroscopic analyses, and theoretical computations. According to adsorption kinetics and isotherms, the uptakes of Pd(II) and Pt(IV) by in MIL-101(Cr)-NH2 were found to be much higher than their uptakes by MIL-101(Cr)-NO2. The abundant protonated amine groups (BDC-NH3+) in MIL-101(Cr)-NH2 were verified to be the main adsorptive binding sites by XPS and FTIR spectroscopy, and FE-SEM imageries. Additionally, BDC-NH3+ shows extremely high affinities (b value) and binding energies (Ebind) for PdCl42- and PtCl62- through electrostatic attraction, resulting in much higher adsorption capacities of MIL-101(Cr)-NH2 for these PGMs as compared to those of MIL-101(Cr)-NO2. Moreover, the MOFs' Cr nodes without terminal -OH indicated positive electrostatic potentials, and certain values of Ebind for PGM anions. Thus, the few-amount cationic Cr sites could also make little contributions to the adsorption of PGM anions in MIL-101(Cr)-NH2 or MIL-101(Cr)-NO2. Furthermore, the perfect regeneration and reusability of MIL-101(Cr)-NH2 over five of adsorption-desorption cycles, suggesting its potential in practical applications.
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Affiliation(s)
- Che-Ryong Lim
- School of Chemical Engineering, Chonbuk National University, Jeonbuk 54896, Republic of Korea
| | - Shuo Lin
- School of Chemical Engineering, Chonbuk National University, Jeonbuk 54896, Republic of Korea; Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, Jeonbuk 54896, Republic of Korea.
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Mao J, Lin S, Lu XJ, Wu XH, Zhou T, Yun YS. Ion-imprinted chitosan fiber for recovery of Pd(II): Obtaining high selectivity through selective adsorption and two-step desorption. Environ Res 2020; 182:108995. [PMID: 31851945 DOI: 10.1016/j.envres.2019.108995] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/21/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
Selective separation of platinum group metals from acidic solutions is of great importance due to their cumulative supply risk and environmental concern. In this study, a Pd(II) ion-imprinted chitosan fiber (ICF) was prepared as the novel adsorbent, and a well-designed two-step desorption process was implemented for selectively recovering Pd(II) from acidic solution containing Pd(II) and interfering metals of Co(II), Ni(II), Cu(II) and Pt (IV). The ICF showed higher selectivity for Pd(II) adsorption, comparing the non-imprinted chitosan fiber (NICF) towards other metals adsorption. The first selective desorption was achieved by NaOH solution, since only Pt (IV) adsorbed on the ICF in a small amount could be eluted, without any acting on Pd(II) ions. The second desorption process was carried out using acidified thiourea solution for the exclusive Pd(II) ions desorption. Therefore, much higher selective recovery of Pd(II) was achieved through ICF with a good selective adsorption performance and a well-designed desorption process. Furthermore, the mechanisms of selective adsorption and desorption were investigated by X-ray photoelectron spectra (XPS) and X-ray diffraction (XRD) analyses. Finally, ICF-packed column system was conducted using synthetic multiple metals solution and a practical hydrometallurgy wastewater as influent, respectively, with a good adsorption capacity of 87.2 mg g-1 and 94.2 mg g-1, resulting quite high concentrated effluent consisted of 97.4% of Pd(II) and 99.5% of Pd(II), respectively. It was opened up a promising designed material and technique for selectively recovering Pd(II) in the further practical large-scale application.
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Affiliation(s)
- Juan Mao
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Shuo Lin
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; School of Chemical Engineering, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
| | - Xie Juan Lu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Xiao Hui Wu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Tao Zhou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, Jeonbuk, 54896, Republic of Korea.
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Bediako JK, Lin S, Sarkar AK, Zhao Y, Choi JW, Song MH, Cho CW, Yun YS. Evaluation of orange peel-derived activated carbons for treatment of dye-contaminated wastewater tailings. Environ Sci Pollut Res Int 2020; 27:1053-1068. [PMID: 31814075 DOI: 10.1007/s11356-019-07031-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
Dyes are colored compounds which are visible even at trace concentrations. Due to their recalcitrance and esthetic persistence, certain methods are unable to effectively eliminate them. So far, adsorptive treatment using activated carbons (ACs) is one of the most successful methods. In this study, we have employed orange peel (OP) as a cost-effective alternative to the expensive coal- and coir-based precursors to synthesize ACs for cationic methylene blue (MB) and anionic methyl orange (MO) dye adsorption. The pre-carbonized OP was activated via H2SO4, NaOH, KOH, ZnCl2, and H3PO4 to study the effects of activation reagents on dye removal efficiencies and mechanisms. Among several isotherm models employed to fit the adsorption data, the Langmuir and Sips models sufficiently estimated the maximum equilibrium uptakes close to the experimental values of 1012.10 ± 29.13, 339.82 ± 6.98, and 382.15 ± 8.62 mg/g, for ZnCl2-AC (MO), ZnCl2-AC (MB), and KOH-AC (MB), respectively. The adsorption mechanisms were suggested to involve electrostatic binding, pi-pi interactions, hydrogen bonding, and electron donor-acceptor reactions. Consequently, more than 99% removal efficiency was achieved from a laboratory organic wastewater sample bearing ~ 35 mg/L of MB. The results thus suggest that the synthesized ACs from agricultural waste have the tendencies to be applied to real dye wastewater treatment.
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Affiliation(s)
- John Kwame Bediako
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea
- Hongik University Research Institute of Science and Technology (HiRIST), Seoul, Republic of Korea
| | - Shuo Lin
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Amit Kumar Sarkar
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Yufeng Zhao
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Jong-Won Choi
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Myung-Hee Song
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea
| | - Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, Republic of Korea.
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea.
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Cho CW, Yun YS. Application of general toxic effects of ionic liquids to predict toxicities of ionic liquids to Spodoptera frugiperda 9, Eisenia fetida, Caenorhabditis elegans, and Danio rerio. Environ Pollut 2019; 255:113185. [PMID: 31522005 DOI: 10.1016/j.envpol.2019.113185] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/19/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
Modeling for the toxicity of ionic liquids (ILs) is necessary to fill data gaps for untested chemicals and to understand the relevant mechanisms at the molecular level. In order for many researchers to easily predict toxicity and/or develop some prediction model, simple method(s) based on a single parameter should be proposed. Therefore, previously our group developed a comprehensive toxicity prediction model with unified linear free-energy relationship descriptors to address the single parameter for predicting the toxicities, as follows (Cho et al., 2016b). Log 1/toxicity in the unit of mM= (2.254 Ec - 2.545 Sc + 0.646 Ac - 1.471 Bc + 1.650 Vc + 2.917 J+ - 0.201 Ea + 0.418 Va + 0.131 J-) - 0.709. It is considered that the model can calculate the general toxicological effect of ILs in parenthesis, as it was developed on the basis of numerous toxic effects i.e., 58 toxicity testing methods and about 1600 data points. In order to check the hypothesis, the values calculated by the model were correlated with four different datasets from insect cell line (Spodoptera frugiperda 9), earthworm (Eisenia fetida), nematode (Caenorhabditis elegans), and fish (Danio rerio). The results clearly showed that the calculated values are in good agreement with each dataset. In the case of S. frugiperda 9 cells, the calculated parameters were correlated with log1/LC50 values, measured after 24 h and 48 h incubation, in R2 of 0.67 and 0.88, respectively. The R2 values for the earthworm, nematode, and fish were 0.88, 0.96, and 0.94-0.95, respectively. This study confirmed that the comprehensive model can be simply and accurately used to predict toxicity of ILs.
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Affiliation(s)
- Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea; School of Chemical Engineering, Chonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea.
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Zhao Y, Cho CW, Cui L, Wei W, Cai J, Wu G, Yun YS. Adsorptive removal of endocrine-disrupting compounds and a pharmaceutical using activated charcoal from aqueous solution: kinetics, equilibrium, and mechanism studies. Environ Sci Pollut Res Int 2019; 26:33897-33905. [PMID: 29959733 DOI: 10.1007/s11356-018-2617-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
Bisphenol A (BPA), diethyl phthalate (DEP), and carbamazepine (CBZ) have been widely used in chemical and pharmaceutical fields, and their residues are detected in various environments. Therefore, to find a suitable method for removing the compounds from an aqueous solution, an adsorption method by granular activated charcoal (AC) was studied. To investigate the adsorption properties of AC, its kinetics, equilibrium, pH effects, and regeneration of AC were examined. Moreover, its surface properties (i.e., surface area, pore volume, functional groups, and surface charge) were characterized by N2 adsorption and desorption isotherm, Fourier transform infrared (FTIR), and zeta potential analyses. Experimental results show that AC has high removal efficiencies for the target compounds at the low initial concentration as well as high estimated adsorption capacities (qm) for DEP, BPA, and CBZ, whose values were 293.4 ± 18.8, 254.9 ± 16.2, and 153.3 ± 1.61 mg/g, respectively. In comparison with other adsorbents based on previously reported results, AC was shown to have generally higher removability for the three compounds than others. Moreover, it was observed that AC's ability to adsorb DEP and BPA was dependent on pH because of hydrolysis and ionization, respectively. Meanwhile, there is no pH effect for CBZ adsorption by AC. After 3 cycles of adsorption/desorption, AC still maintained 92, 100, and 82% of initial adsorption capacities for DEP, BPA, and CBZ, respectively. Therefore, the AC is an effective adsorbent for the removal of endocrine-disrupting chemicals and pharmaceuticals from aqueous solution.
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Affiliation(s)
- Yufeng Zhao
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, 54896, Republic of Korea
| | - Chul-Woong Cho
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, 54896, Republic of Korea
| | - Longzhe Cui
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Wei Wei
- School of Geographic Science, Xinyang Normal University, Xinyang, 464000, China
| | - Junxiong Cai
- Hubei Academy of Environmental Science, No. 338 Bayi Road, Wuchang District, 430072, Hubei, China
| | - Guiping Wu
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, China.
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, 54896, Republic of Korea.
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Kim N, Park M, Yun YS, Park D. Removal of anionic arsenate by a PEI-coated bacterial biosorbent prepared from fermentation biowaste. Chemosphere 2019; 226:67-74. [PMID: 30913429 DOI: 10.1016/j.chemosphere.2019.03.113] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/14/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
As a problematic element in water systems, arsenic exists as As(III) and As(V). Adsorption techniques can be used to remove anionic As(V) as it is present as a polyatomic anion. In the case of As(III) which exists in zero-valent state under neutral pH, it can be also removed by adsorption after being converted into As(V). Many inorganic and organic materials have been examined as potential adsorbents for anionic As(V) removal. However, most exhibit relatively low adsorption capacities (<10 mg/g). The objective of this study is to examine As(V)-removal mechanism and practical potential of a PEI-coated bacterial biosorbent prepared from fermentation biowaste. The maximum As(V) uptake of the biosorbent was determined to be 62.99 mg/g by Langmuir model. The effects of various parameters including pH, biosorbent dosage, ionic strength and temperature were also examined. Kinetic and equilibrium models were used to interpret the experimental data mathematically. A 0.01 M NaOH solution was chosen as an effective As(V)-desorbing eluent for biosorbent regeneration. The adsorption capacity of the biosorbent remained above 85% over three successive cycles of adsorption and desorption. In conclusion, the biowaste-driven biosorbent is a promising anion adsorbent for treatment of As(V)-contaminated wasters.
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Affiliation(s)
- Namgyu Kim
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju, 26493, Republic of Korea
| | - Munsik Park
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju, 26493, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Jeounju, 54896, Republic of Korea
| | - Donghee Park
- Department of Environmental Engineering, Yonsei University, 1 Yonseidae-gil, Wonju, 26493, Republic of Korea.
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Bediako JK, Sarkar AK, Lin S, Zhao Y, Song MH, Choi JW, Cho CW, Yun YS. Characterization of the residual biochemical components of sequentially extracted banana peel biomasses and their environmental remediation applications. Waste Manag 2019; 89:141-153. [PMID: 31079727 DOI: 10.1016/j.wasman.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 03/27/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
After consumption of the inner fleshy fruit, the banana peel like many other fruit peels is usually disposed of unprocessed. For sustainable development, agro-wastes including banana peels need to be converted into valuable products that will be beneficial to human and the environment. In this study, biochemical components including lipids, proteins and structural polysaccharides were sequentially extracted from banana peel, and the residuals were characterized by FE-SEM/EDX, FTIR, XRD, TGA/DSC, XPS and elemental analysis. Owing to rapid industrialization, toxic species such as metals and dyes are consistently released into the aquatic environments. Therefore, the residual biomass samples were evaluated for environmental remediation application. The adsorption performances were outstanding, with uptakes reaching 1034, 279 and 152 mg/g, for methylene blue, lead and platinum, respectively. This study thus suggests that sequential extraction and detailed characterization are useful for identification of key contributing components for development of high-performance agro-waste-based adsorbents for water treatment.
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Affiliation(s)
- John Kwame Bediako
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Amit Kumar Sarkar
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Shuo Lin
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Yufeng Zhao
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Myung-Hee Song
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Jong-Won Choi
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Chul-Woong Cho
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, Republic of Korea.
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea.
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Cho CW, Zhao Y, Yun YS. QSAR modelling for predicting adsorption of neutral, cationic, and anionic pharmaceuticals and other neutral compounds to microalgae Chlorella vulgaris in aquatic environment. Water Res 2019; 151:288-295. [PMID: 30616041 DOI: 10.1016/j.watres.2018.12.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/21/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
Environmental fate or transport of pharmaceutical waste depends on the adsorptive interactions of pharmaceuticals with various environmental phases e.g. soil, sediment, microalgae, and bacteria etc. Therefore, it is important to understand these adsorptive interactions. As part of the study, we studied the adsorptive interaction of 30 chemicals with microalgae, i.e. Chlorella vulgaris, because it is ubiquitous and its surface area occupies a high proportion in aquatic environments. For this study, isotherms between C. vulgaris and 30 micropollutants in neutral and ionic forms (i.e. 15 cations, 5 anions, and 10 neutrals) were experimentally measured, and their adsorptive affinities were then theoretically predicted based on the concept of the linear free energy relationship. For modeling, the dataset was divided into a training set and a test set, where the training set was used for model development and the test set was performed for model validation. This process was repeated ten times. Finally, we suggested one model which has high predictability in R2 of 0.96 and standard error (SE) of 0.17 log unit for the training set, R2 of 0.818 and SE = 0.217 log unit for the test set, and R2 of 0.926 and SE of 0.169 log unit for the total dataset. Moreover, it was found that dispersive force, H-bond basicity, molecular volume, and electrostatic interaction of anion significantly contribute to the model developed based on the entire dataset. Here, dispersive and hydrophobic interactions (proportional to the magnitude of molecular size) are main attractive forces, while the rest cases are repulsive. In addition, it was found that the adsorption property of the surface of C. vulgaris differs from those of Gram negative bacteria Escherichia coli and dissolved organic matters in an aquatic environment.
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Affiliation(s)
- Chul-Woong Cho
- School of Chemical Engineering, Chonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | - Yufeng Zhao
- School of Chemical Engineering, Chonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea.
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Liu Y, Lin S, Liu Y, Sarkar AK, Bediako JK, Kim HY, Yun YS. Super-Stable, Highly Efficient, and Recyclable Fibrous Metal-Organic Framework Membranes for Precious Metal Recovery from Strong Acidic Solutions. Small 2019; 15:e1805242. [PMID: 30690878 DOI: 10.1002/smll.201805242] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/13/2019] [Indexed: 06/09/2023]
Abstract
Precious metals such as palladium (Pd) and platinum (Pt) are marvelous materials in the fields of electronic and catalysis, but they are tapering day by day. Zr(IV)-based metal-organic frameworks (MOFs) are competent for their recovery, notably in harsh environments, while the general powder form limits their practical application. Porous MOF-based membranes with ultraefficient metal ion permeation, strong stability, and high selectivity are, therefore, strikingly preferred. Herein, a set of polymeric fibrous membranes incorporated with the UiO-66 series are fabricated; their adsorption/desorption capabilities toward Pd(II) and Pt(IV) are evaluated from strongly acidic solutions; and the MOF-polymer compatibilities are investigated. Polyurethane (PU)/UiO-66-NH2 showed strong acid resistance and high chemical stability, which are attributable to strong π-π interactions between PU and MOF nanoparticles with a high configuration of energy. The as-fabricated MOF membranes show extremely good adsorption/desorption performances without ruptures/coalitions of nanofibers or leak of MOF nanoparticles, and successfully display the efficacy in a gravity-driven or even continuous-flow system with good recycle performance and selectivity. The as-fabricated MOF membranes set an example of potential MOF-polymer compatibility for practical applications.
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Affiliation(s)
- Yang Liu
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Department of BIN Convergence Technology, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
| | - Shuo Lin
- School of Chemical Engineering, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
| | - Yanan Liu
- Department of BIN Convergence Technology, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
| | - Amit Kumar Sarkar
- School of Chemical Engineering, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
| | - John Kwame Bediako
- School of Chemical Engineering, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
| | - Hak Yong Kim
- Department of BIN Convergence Technology, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, Jeonbuk, 54896, Republic of Korea
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Kim DG, Lee C, Yun YS, Hong CH, Choi YE. Recycling waste nutrient solution originating from the plant factory with the cultivation of newly isolated Acutodesmus species. J Biotechnol 2019; 289:15-25. [PMID: 30389641 DOI: 10.1016/j.jbiotec.2018.10.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 09/19/2018] [Accepted: 10/29/2018] [Indexed: 11/16/2022]
Abstract
Plant factories have been developed to replace traditional agriculture, aiming to solve future problems of food availability. However, the nutrient solution in a plant factory is discharged after a single batch of plant cultivation, giving rise to large amounts of waste nutrient solution. Microalgae can be used to treat a wide variety of wastewater and effectively remove excessive nutrients from wastewater. Therefore, the incorporation of microalgal cultivation into a plant factory to treat waste nutrients would be a reasonable approach facilitating removal of waste nutrients with concomitant production of algal biomass. In this study, we isolated novel microalgal species suitable for the growth in waste nutrients from a plant factory and subsequently an underwater LED photobioreactor was constructed being incorporated into the plant factory system. Finally, treated waste nutrient solution was recycled back into the plant factory and successfully used for the cultivation of plant of butterhead lettuce (Lactuca sativa L.).
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Affiliation(s)
- Dae Geun Kim
- LED Agri-Bio Fusion Technology Research Center, Chonbuk National University, 79 Gobong-ro, Iksan-si, Jeollabuk-do, 54596, Republic of Korea
| | - Changsu Lee
- Microbiology and Functionality Research Group, World Institute of Kimchi, Gwangju, 61755, Republic of Korea
| | - Yeoung-Sang Yun
- Department of Bioprocess Engineering, Chonbuk National University, Jeonju, 54896, Republic of Korea
| | - Chang-Hee Hong
- LED Agri-Bio Fusion Technology Research Center, Chonbuk National University, 79 Gobong-ro, Iksan-si, Jeollabuk-do, 54596, Republic of Korea
| | - Yoon-E Choi
- Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
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Zhao Y, Choi JW, Lin S, Kim JA, Cho CW, Yun YS. Experimental and QSAR studies on adsorptive interaction of anionic nonsteroidal anti-inflammatory drugs with activated charcoal. Chemosphere 2018; 212:620-628. [PMID: 30173108 DOI: 10.1016/j.chemosphere.2018.08.115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/20/2018] [Accepted: 08/22/2018] [Indexed: 06/08/2023]
Abstract
Adsorptive interactions, namely adsorption capacity (qm) and affinity (b), between nonsteroidal anti-inflammatory drugs (NSAIDs) in anionic forms and commercial activated charcoal (AC), were estimated by isotherm experiment in a batch, and the properties were modeled based on the concept of quantitative structure-activity relationship (QSAR). Experimental results showed that AC had a high qm (0.38-0.67 mmol g-1) and b (14.03-930.8 L mmol-1) for the selected NSAIDs. In QSAR modeling, linear free energy relationship (LFER) descriptors of excess molar refraction (E), dipolarity/polarizability (S), and Coulombic interactions of anions (J-) were highly related to log qm, and the combination of the three terms could predict log qm in R2 of 0.97 and SE of 0.015 log unit. In the case of b, only single B term showed a good correlation with log b in R2 of 0.81. Additionally, the combination of hydrogen-bonding acceptors (HBAs) and molar volume (MV), which are easily calculable parameters, could also derive good predictability in R2 = 0.81 and SE = 0.26 log unit. Afterwards, validation of the QSAR models based on the leave-one-out cross-validation (Q2LOO) method showed that the models were acceptable.
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Affiliation(s)
- Yufeng Zhao
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 561-756, Republic of Korea.
| | - Jong-Won Choi
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 561-756, Republic of Korea.
| | - Shuo Lin
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 561-756, Republic of Korea.
| | - Jeong-Ae Kim
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 561-756, Republic of Korea.
| | - Chul-Woong Cho
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 561-756, Republic of Korea.
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk, 561-756, Republic of Korea.
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Zhao Y, Choi JW, Bediako JK, Song MH, Lin S, Cho CW, Yun YS. Adsorptive interaction of cationic pharmaceuticals on activated charcoal: Experimental determination and QSAR modelling. J Hazard Mater 2018; 360:529-535. [PMID: 30145479 DOI: 10.1016/j.jhazmat.2018.08.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 08/06/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Abstract
Due to high mobility and specific toxic actions of the ionizable pharmaceuticals in surface water with a normal range of pH, the pharmaceuticals should be removed before being discharged. Therefore, this study investigated the adsorptive interactions between cationic pharmaceuticals and a popular adsorbent (i.e., activated charcoal) frequently used in water treatment processes. For that, we performed isotherm experiments and then the results were plotted by Langmuir model to determine the adsorption affinity (b) and capacity (qm). Afterwards, to interpret the adsorption behaviors, two simple prediction models were developed based on quantitative structure-activity relationships (QSAR). In the modelling, molecular weight (MW), polar surface area (PSA), and octanol-water partitioning coefficient (log P) were used as model parameters. In the results, the combinations of these three parameters could predict the adsorption affinity and capacity in R2 of 0.85 and 0.80, respectively. The robustness of models was validated by leave-one-out cross-validation (Q2LOO) and the estimated Q2LOO values were 0.60 and 0.55 for the adsorption affinity and capacity, respectively, which are higher than the acceptability of standard i.e., 0.5.
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Affiliation(s)
- Yufeng Zhao
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Jong-Won Choi
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - John Kwame Bediako
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Myung-Hee Song
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Shuo Lin
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Chul-Woong Cho
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea.
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Choi JW, Zhao Y, Bediako JK, Cho CW, Yun YS. Estimating environmental fate of tricyclic antidepressants in wastewater treatment plant. Sci Total Environ 2018; 634:52-58. [PMID: 29626770 DOI: 10.1016/j.scitotenv.2018.03.278] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/19/2018] [Accepted: 03/23/2018] [Indexed: 06/08/2023]
Abstract
TCAs are known to be toxicants and endocrine disrupting agents. Generally, after being used, TCAs are passed through wastewater treatment plants (WWTPs) to be treated. However, still trace amounts (ng/L to μg/L) of TCAs have been founded even in the treated water. Therefore, the aim of this study is to elucidate the environmental behaviors of TCAs in the sewage water from WWTPs (Jeonju, Korea). For the experiments, seven TCAs (amitriptyline, imipramine, clomipramine, desipramine, protriptyline, nortriptyline, and doxepin) were selected. Hydrolysibility, biodegradability, and adsorbability of the selected seven TCAs were evaluated. Based on the results, it was concluded that TCAs are not readily hydrolyzed in water and also not biodegraded by aerobic sludge. The 60% to 85% of TCAs were adsorbed immediately onto the activated sludge within 1 s via electrostatic and hydrophobic interactions. It was clearly observed that adsorption affinities were dependent on the types of activated sludge (i.e. anaerobic and aerobic sludge). The affinities of aerobic and anaerobic sludge towards the TCAs at trace concentrations e.g., 1 to 10 μg/L, were estimated to be in the range from 0.021 ± 0.000 to 0.087 ± 0.000 L/μg and from 0.001 ± 0.000 to 0.108 ± 0.001 L/μg, respectively.
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Affiliation(s)
- Jong-Won Choi
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
| | - Yufeng Zhao
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
| | - John Kwame Bediako
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
| | - Chul-Woong Cho
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea.
| | - Yeoung-Sang Yun
- Environmental Biotechnology National Research Laboratory, School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea.
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Lin S, Zhao Y, Yun YS. Highly Effective Removal of Nonsteroidal Anti-inflammatory Pharmaceuticals from Water by Zr(IV)-Based Metal-Organic Framework: Adsorption Performance and Mechanisms. ACS Appl Mater Interfaces 2018; 10:28076-28085. [PMID: 30095886 DOI: 10.1021/acsami.8b08596] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nonsteroidal anti-inflammatory pharmaceuticals are emerging organic micropollutants in surface water, groundwater, and wastewater, whose removal is very important yet challenging. As a new class of porous functional materials, metal-organic frameworks (MOFs) have attracted extensive attention for their adsorption applications. Here, we report that Zr(IV)-based MOFs (defective UiO-66, and MOF-808) have extraordinary adsorption ability to remove nonsteroidal anti-inflammatory pharmaceuticals from water. Excellent adsorption performances are obtained for UiO-66 and MOF-808, particularly for UiO-66, of which the adsorption capacities are the highest in a wide series of adsorptive materials previously reported. It is elucidated that the incomplete-coordinated cationic Zr in the cluster has high affinity for the anionic pharmaceutical (chemical adsorption) and that the adsorption interaction between the benzene ring of the pharmaceutical and MOF's ligand is involved to enhance or as an alternative to the adsorption interactions (π-π interaction). In particular, adsorption of ibuprofen, ketoprofen, naproxen, indomethacin, and furosemide by UiO-66 and MOF-808 and the synergetic effect of chemical adsorption and π-π interaction are outstanding, leading to extremely higher binding energies ( Ebind) and sorption abilities.
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Affiliation(s)
- Shuo Lin
- School of Chemical Engineering , Chonbuk National University , Jeonbuk 54896 , Republic of Korea
| | - Yufeng Zhao
- School of Chemical Engineering , Chonbuk National University , Jeonbuk 54896 , Republic of Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering , Chonbuk National University , Jeonbuk 54896 , Republic of Korea
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Cho CW, Stolte S, Yun YS. Validation and updating of QSAR models for partitioning coefficients of ionic liquids in octanol-water and development of a new LFER model. Sci Total Environ 2018; 633:920-928. [PMID: 29602125 DOI: 10.1016/j.scitotenv.2018.03.225] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/28/2018] [Accepted: 03/20/2018] [Indexed: 06/08/2023]
Abstract
Since estimating the octanol-water partitioning coefficients (log P) of numerous ionic liquids (ILs) is tedious, time & material consuming and labor intensive, predicting by quantitative structure-activity relationship (QSAR) approach is necessary. Although several researchers presented the QSAR models for the property, validation assessment of the models were not sufficiently performed due to lack of log P dataset. In this study, the log P values of external ILs were measured by a shaking-flask method or collected from literatures. The newly obtained external log P values were applied for the validation study of previous models. In results, it was found that previous models showed rather low predictabilities and/or non-ignorable prediction limits to some IL structures whose anions were not involved in the previous studies. Accordingly, to achieve better predictability, the parameters used for previous modeling were re-selected and also their coefficients were re-calculated by multiple linear regression analysis with an inclusion of the external validation set to previous training set. Moreover, for reasonable understanding of chemical meanings in octanol-water partitioning behavior of ILs, we developed a new prediction model with a few number of descriptors, which has a good accuracy of R2 = 0.862 and standard error = 0.564 log units.
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Affiliation(s)
- Chul-Woong Cho
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
| | - Stefan Stolte
- Department of Hydrosciences, Technical University of Dresden, Bergstraße 66, 01069 Dresden, Germany; Institute of Water Chemistry, Technical University of Dresden, Bergstraße 66, 01069 Dresden, Germany
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea.
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43
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Lee C, Choi YE, Yun YS. Corrigendum to "A strategy for promoting astaxanthin accumulation in Haematococcus pluvialis by 1-aminocyclopropane-1-carboxylic acid application" [Journal of Biotechnology Vol. 236./Iss 20. (2016) 120-127.]. J Biotechnol 2018; 271:63. [PMID: 29576061 DOI: 10.1016/j.jbiotec.2018.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Changsu Lee
- Department of Bioprocess Engineering, Chonbuk National University, Jeonju54896, Republic of Korea
| | - Yoon-E Choi
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul02841, Republic of Korea.
| | - Yeoung-Sang Yun
- Department of Bioprocess Engineering, Chonbuk National University, Jeonju54896, Republic of Korea
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Yun JI, Bhattarai S, Yun YS, Lee YS. Synthesis of thiourea-immobilized polystyrene nanoparticles and their sorption behavior with respect to silver ions in aqueous phase. J Hazard Mater 2018; 344:398-407. [PMID: 29096253 DOI: 10.1016/j.jhazmat.2017.10.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/19/2017] [Accepted: 10/23/2017] [Indexed: 06/07/2023]
Abstract
Although a thiourea-immobilized polystyrene sorbent has been reported to exhibit high Ag+ sorption capacity (135mg/g), it is not stable under the acidic conditions commonly employed for desorption. In this research, we synthesized novel thiourea-immobilized polystyrene (TA-PS) nanoparticles to be highly acid resistant via a two-step procedure from polystyrene nanoparticles: acetylation and the subsequent immobilization of thiourea. We investigated the influences of pH, contact time, and initial concentration of AgNO3 solution on the Ag+ sorption of the polymer nanoparticles and estimated the maximum Ag+ sorption capacity to be 190±5mg/g at a pH of 6. The sorption performance did not significantly decrease in tap water containing competing ions. The sorption kinetic data were well fitted to the pseudo-second-order kinetic model. Overall, the TA-PS nanoparticles exhibited a high Ag+ sorption capacity and high selectivity against alkaline and alkaline earth-metal ions. In particular, their high acid resistance allows them to be used for long time periods in sorption-desorption processes.
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Affiliation(s)
- Ji-In Yun
- Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeounju-si, Jeollabuk-do 561-756, Republic of Korea
| | - Saurabha Bhattarai
- Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeounju-si, Jeollabuk-do 561-756, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeounju-si, Jeollabuk-do 561-756, Republic of Korea
| | - Youn-Sik Lee
- Division of Chemical Engineering, Nanomaterials Processing Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeounju-si, Jeollabuk-do 561-756, Republic of Korea.
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Choe JH, Jeon J, Lee ME, Wie JJ, Jin HJ, Yun YS. Nanoconfinement effects of chemically reduced graphene oxide nanoribbons on poly(vinyl chloride). Nanoscale 2018; 10:2025-2033. [PMID: 29322142 DOI: 10.1039/c7nr07098e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Polymeric nanocomposites with graphene-based nanocarbons (GNCs) have been extensively studied with emphasis on the percolation of nanofillers toward electrical, rheological, and mechanical reinforcement. In this study, we report an unusual indirect reinforcing phenomenon of highly defective GNCs dispersed in the poly(vinyl chloride) (PVC) matrix via densification of the polymer packing originating from nanoscale confinement. Herein, chemically reduced graphene oxide nanoribbons (C-rGONRs) are employed as a nanofiller. The inclusion of defective and oxygen-functionalized C-rGONRs resulted in a dramatic densification of the PVC host with extremely low C-rGONR loading, largely exceeding the theoretical calculation from a rule of mixture. Along with the densification, the glass transition temperature of PVC also increased by 28.6 °C at 0.1 wt% filler loading. Remarkably, the oxygen barrier property and mechanical toughness under tension for the PVC/C-rGONR nanocomposite were the maximum when the greatest densification occurred. The structure-property relationship of the nanocomposites has been discussed with an emphasis on the nanoscale confinement phenomenon.
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Affiliation(s)
- J H Choe
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, South Korea.
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Kim S, Yun YS, Choi YE. Development of waste biomass based sorbent for removal of cyanotoxin microcystin-LR from aqueous phases. Bioresour Technol 2018; 247:690-696. [PMID: 30060401 DOI: 10.1016/j.biortech.2017.09.164] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 09/20/2017] [Accepted: 09/23/2017] [Indexed: 06/08/2023]
Abstract
The purpose of this study was to establish the strategy to remove the cyanotoxin microcystin-LR (MC-LR) from aqueous solution with the use of biosorption strategy. Specifically, we focused on use of industrial waste biomass, Escherichia coli, to make efficient biosorbents for MC-LR through immobilization of the biomass with polysulfone (PS), coating the polysulfone-biomass composite with polyethylenimine (PEI), and decarboxylation of the PEI-coated composite to remove the inhibitory sites. The resulting sorbent is named in this study as decarboxylated PEI-coated polysulfone-biomass composite fiber (DC-PEI-PSBF). Various sorption experiments including isotherm, kinetics and pH effect on sorption capacity were conducted to evaluate the MC-LR adsorption performance of sorbents. As a result, the DC-PEI-PSBF could be suggested as a highly efficient sorbent able to be directly applied for MC-LR removal from aquatic natures.
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Affiliation(s)
- Sok Kim
- Division of Environmental Science and Ecological Engineering, Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonbuk 54896, Republic of Korea
| | - Yoon-E Choi
- Division of Environmental Science and Ecological Engineering, Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea.
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Cho CW, Park JS, Zhao Y, Yun YS. Quantitative analysis of adsorptive interactions of ionic and neutral pharmaceuticals and other chemicals with the surface of Escherichia coli cells in aquatic environment. Environ Pollut 2017; 227:8-14. [PMID: 28454022 DOI: 10.1016/j.envpol.2017.04.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 04/17/2017] [Indexed: 06/07/2023]
Abstract
Since Escherichia coli is ubiquitous in nature and has been applied to biological, chemical, and environmental processes, molecular-level understanding of adsorptive interactions between chemicals and the bacterial surface is of great importance. To characterise the adsorption properties of the surface of E. coli cells in aquatic environment, the binding affinities (log Kd) of calibration compounds were experimentally measured, and then based on the values and numerically well-defined molecular interaction forces, i.e. linear free energy relationship (LFER) descriptors, a predictive model was developed. The examined substances are composed of cations, anions, and neutral compounds, and the used LFER descriptors are excess molar refraction (E), dipolarity/polarisability (S), H-bonding acidity (A) and basicity (B), McGowan volume (V), and coulombic interactions of cations (J+) and anions (J-). In experimental results, adsorption of anions on the bacterial surface was not observed, while cations exhibited high affinities. In case of neutral compounds, their low quantities were adsorbed, however whose affinities were mostly lower than those of cations. In a LFER study, it was shown that cationic interaction term has the best correlation in R2 of 0.691 and sequential additions of S, A, and V help to increase the prediction accuracy. The LFER model (log Kd = - 0.72-0.79 S + 0.81 A + 0.41 V + 0.85 J+) could predict the log Kd in R2 of 0.871 and SE of 0.402 log unit, and then to check robustness and predictability of the model, we internally validated it by a leave-one-out cross validation (Q2LOO) study. As a result, the Q2LOO value was estimated to be 0.826, which was larger than standard of model acceptability (>0.5).
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Affiliation(s)
- Chul-Woong Cho
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Jeong-Soo Park
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Yufeng Zhao
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea.
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Reddy DHK, Wei W, Shuo L, Song MH, Yun YS. Fabrication of Stable and Regenerable Amine Functionalized Magnetic Nanoparticles as a Potential Material for Pt(IV) Recovery from Acidic Solutions. ACS Appl Mater Interfaces 2017; 9:18650-18659. [PMID: 28272860 DOI: 10.1021/acsami.6b16813] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
MnFe2O4@SiO2-NH2 magnetic nanocomposite (AFMNC) adsorbent with a particle size of ∼50 nm was successfully synthesized using a facile approach. The as-prepared composite particles showed a fast binding of Pt(IV) with easy magnetic solid-liquid separation. The kinetic data were fitted to both pseudo-first and second-order rate models, indicating that AFMNC exhibited a much higher rate of Pt(IV) binding (0.125 g mg-1 min-1) compared to that of commercial ion-exchange resin Amberjet 4200 (0.0002 g mg-1 min-1). The equilibrium adsorption data were fitted to the Langmuir isotherm model with a relatively high sorption capacity of 380 mg/g. Scanning transmission electron microscopy analysis demonstrated the presence of platinum chloride after sorption on AFMNC, suggesting an adsorbate-adsorbent anion-exchange interaction. In addition, due to its magnetic characteristics, AFMNC can be easily separated from the aqueous medium after the sorption process. The novel nanocomposite may facilitate recovery of Pt(IV) from waste solutions.
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Affiliation(s)
- D Harikishore Kumar Reddy
- Division of Semiconductor and Chemical Engineering, Chonbuk National University , Jeonbuk 561-756, Republic of Korea
| | - Wei Wei
- Division of Semiconductor and Chemical Engineering, Chonbuk National University , Jeonbuk 561-756, Republic of Korea
| | - Lin Shuo
- Division of Semiconductor and Chemical Engineering, Chonbuk National University , Jeonbuk 561-756, Republic of Korea
| | - Myung-Hee Song
- Division of Semiconductor and Chemical Engineering, Chonbuk National University , Jeonbuk 561-756, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University , Jeonbuk 561-756, Republic of Korea
- Department of Bioprocess Engineering, Chonbuk National University , Jeonbuk 561-756, Republic of Korea
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Cho CW, Song MH, Yun YS. Comment on "Filling environmental data gaps with QSPR for ionic liquids: Modeling n-octanol/water coefficient". J Hazard Mater 2017; 329:348-350. [PMID: 27810322 DOI: 10.1016/j.jhazmat.2016.10.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 09/28/2016] [Accepted: 10/25/2016] [Indexed: 06/06/2023]
Affiliation(s)
- Chul-Woong Cho
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
| | - Myung-Hee Song
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea.
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea.
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Song MH, Kim S, Reddy DHK, Wei W, Bediako JK, Park S, Yun YS. Development of polyethyleneimine-loaded core-shell chitosan hollow beads and their application for platinum recovery in sequential metal scavenging fill-and-draw process. J Hazard Mater 2017; 324:724-731. [PMID: 27889182 DOI: 10.1016/j.jhazmat.2016.11.047] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 11/04/2016] [Accepted: 11/17/2016] [Indexed: 06/06/2023]
Abstract
Polyethyleneimine (PEI)-loaded chitosan hollow beads (CHBs) were fabricated through the ionotropic gelation process using sodium tripolyphosphate (TPP) as a counter polyanion. The CHBs were loaded with hydrophilic PEI in pre- and/or post-loading methods. Hence, the sorbent could possess a large number of amine groups which were able to function as the binding sites to recover platinum metal ions. The enhancement of the amine groups was confirmed by Fourier transform infrared spectroscopy (FTIR). Isotherm and kinetic studies were carried out to evaluate the sorption performance of the sorbents. The maximum Pt(IV) uptake by the PEI-loaded CHBs was estimated to be 815.2±72.6mg/g, which was much higher than that of a commercial ion exchange resin, Lewatit® MonoPlus TP214 (330.2±16.6mg/g). A sequential metal scavenging fill-and-draw process was operated using the PEI-loaded CHBs sorbents for ten cycles and the Pt(IV) recovery efficiency was kept above 97.4% even after the last cycle. These results indicated that the ionic polymer-loaded hydrogel hollow beads can be a novel platform to design high-performance sorbents able to recover and/or scavenge anionic precious metal ions even from trace metal solutions.
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Affiliation(s)
- Myung-Hee Song
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Sok Kim
- Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - D Harikishore Kumar Reddy
- School of Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Wei Wei
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - John Kwame Bediako
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Sangwon Park
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Yeoung-Sang Yun
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea; School of Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
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