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Sodeifian G, Alwi RS, Sodeifian F, Amraee S, Rashidi-Nooshabadi M, Razmimanesh F. Determination of Regorafenib monohydrate (colorectal anticancer drug) solubility in supercritical CO 2: Experimental and thermodynamic modeling. Heliyon 2024; 10:e29049. [PMID: 38681600 PMCID: PMC11052913 DOI: 10.1016/j.heliyon.2024.e29049] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 05/01/2024] Open
Abstract
In this study, the solubilities of Regorafenib monohydrate (REG), a widely used as a colorectal anticancer drug, in supercritical carbon dioxide (ScCO2) were measured under various pressures and temperature conditions, for the first time. The minimum value of REG in mole fraction was determined to be 3.06×10-7, while the maximum value was found to be 6.44×10-6 at 338 K and 27 MPa. The experimental data for REG were correlated through the utilization of two types of models: (1) a set of 25 existing empirical and semi-empirical models that incorporated 3-8 parameters according to functional dependencies, (2) a model that relied on solid-liquid equilibrium (SLE) and the newly improved association models. All of the evaluated models were capable of generating suitable fits to the solubility data of REG, however, the average absolute relative deviation (AARD) of Gordillo et al. model (AARD=13.2%) and Reddy et al. model (AARD=13.5%) indicated their superiority based on AARD%. Furthermore, solvation and sublimation enthalpies of REG drug were estimated for the first time.
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Affiliation(s)
- Gholamhossein Sodeifian
- Department of Chemical Engineering, Faculty of Engineering, University of Kashan, 87317-53153, Kashan, Iran
- Laboratory of Supercritical Fluids and Nanotechnology, University of Kashan, 87317-53153, Kashan, Iran
- Modeling and Simulation Centre, Faculty of Engineering, University of Kashan, 87317-53153, Kashan, Iran
| | - Ratna Surya Alwi
- Research Centre for Computing, National Research and Innovation Agency (BRIN), Jl, Raya Jakarta-Bogor KM 46 Cibinong, Indonesia
| | | | - Solmaz Amraee
- Department of Chemical Engineering, Faculty of Engineering, University of Kashan, 87317-53153, Kashan, Iran
- Laboratory of Supercritical Fluids and Nanotechnology, University of Kashan, 87317-53153, Kashan, Iran
- Modeling and Simulation Centre, Faculty of Engineering, University of Kashan, 87317-53153, Kashan, Iran
| | | | - Fariba Razmimanesh
- Department of Chemical Engineering, Faculty of Engineering, University of Kashan, 87317-53153, Kashan, Iran
- Laboratory of Supercritical Fluids and Nanotechnology, University of Kashan, 87317-53153, Kashan, Iran
- Modeling and Simulation Centre, Faculty of Engineering, University of Kashan, 87317-53153, Kashan, Iran
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Nurumgaliyev A, Zhuniskaliyev T, Shevko V, Mukhambetgaliyev Y, Kelamanov B, Kuatbay Y, Badikova A, Yerekeyeva G, Volokitina I. Modeling and development of technology for smelting a complex alloy (ligature) Fe-Si-Mn-Al from manganese-containing briquettes and high-ash coals. Sci Rep 2024; 14:7456. [PMID: 38548797 PMCID: PMC10978985 DOI: 10.1038/s41598-024-57529-6] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 03/19/2024] [Indexed: 04/01/2024] Open
Abstract
Investigation of the possibility of obtaining a complex master alloy used in the deoxidation of steel, smelted from substandard manganese-containing materials, briquettes, and high-ash coals in ore-thermal electric furnaces. Thermodynamic modeling was carried out using the HSC Chemistry software package to determine the optimal process parameters using a second-order rotatable plan (Box-Hunter plan). Thermodynamic modeling improves the understanding of physical and chemical processes, allows making predictions about the behavior of the system under various conditions, optimizing processes and saving time and resources necessary for experiments. Electric smelting of the briquette was carried out with coal and quartzite (to adjust the chemical composition and neutralize residual carbon) in an ore-thermal electric furnace with a power of up to 150 kV*A. The influence of temperature on the equilibrium distribution of silicon, manganese, and aluminum in the «briquette-coal-quartzite» system, the degree of transition of silicon and manganese into a complex ligature and the content of these metals in the alloy are determined by the method of thermodynamic modeling. As a result of experiments on ore-thermal electric smelting of a briquette with high-ash coal, a complex ligature was obtained with an average content of 45.92-53.11% silicon, 27.72-34.81% manganese and 5.60-6.91% aluminum.
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Affiliation(s)
| | | | - Viktor Shevko
- South Kazakhstan University Named After M. Auezov, Shymkent, Kazakhstan
| | | | | | | | | | - Gauhar Yerekeyeva
- Karaganda Industrial University, Temirtau, Kazakhstan
- Chemical and Metallurgical Institute Named After Zh. Abishev, Karaganda, Kazakhstan
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Shim YD, Chen MC, Ha S, Chang HJ, Baek S, Lee EH. Multi-scaled temporal modeling of cardiovascular disease progression: An illustration of proximal arteries in pulmonary hypertension. J Biomech 2024; 168:112059. [PMID: 38631187 DOI: 10.1016/j.jbiomech.2024.112059] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 03/16/2024] [Accepted: 03/21/2024] [Indexed: 04/19/2024]
Abstract
The progression of cardiovascular disease is intricately influenced by a complex interplay between physiological pathways, biochemical processes, and physical mechanisms. This study aimed to develop an in-silico physics-based approach to comprehensively model the multifaceted vascular pathophysiological adaptations. This approach focused on capturing the progression of proximal pulmonary arterial hypertension, which is significantly associated with the irreversible degradation of arterial walls and compensatory stress-induced growth and remodeling. This study incorporated critical characteristics related to the distinct time scales for the deformation, thus reflecting the impact of mean pressure on artery growth and tissue damage. The in-silico simulation of the progression of pulmonary hypertension was realized based on computational code combined with the finite element method (FEM) for the simulation of disease progression. The parametric studies further explored the consequences of these irreversible processes. This computational modeling approach may advance our understanding of pulmonary hypertension and its progression.
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Affiliation(s)
- Young-Dae Shim
- Department of Smart Fabrication Technology, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea.
| | - Mei-Cen Chen
- Department of Smart Fabrication Technology, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea.
| | - Seongmin Ha
- Biomedical Engineering, Yonsei University College of Medicine 250, Seoul, Republic of Korea.
| | - Hyuk-Jae Chang
- Division of Cardiology, Yonsei University College of Medicine 250, Seoul, Republic of Korea.
| | - Seungik Baek
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, United States.
| | - Eun-Ho Lee
- Department of Smart Fabrication Technology, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea; School of Mechanical Engineering, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea; Department of Intelligent Robotics, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea.
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Zarei A, Haghbakhsh R, Raeissi S. Overview and thermodynamic modelling of deep eutectic solvents as co-solvents to enhance drug solubilities in water. Eur J Pharm Biopharm 2023; 193:1-15. [PMID: 37838144 DOI: 10.1016/j.ejpb.2023.10.007] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 10/05/2023] [Accepted: 10/08/2023] [Indexed: 10/16/2023]
Abstract
The poor water solubility of active pharmaceutical ingredients (APIs) is a major challenge in the pharmaceutical industry. Co-solvents are sometimes added to enhance drug dissolution. A novel group of co-solvents, the Deep Eutectic Solvents (DES), have gained interest in the pharmaceutical field due to their good solvent power, biodegradability, sustainability, non-toxicity, and low cost. In this study, we first provide an overview of all the literature solubility studies involving a drug or API + water + DES, which can be a valuable list to some researchers. Then, we analyze these systems with focus on each individual drug/API and provide statistical information on each. A similar analysis is carried out with focus on the individual DESs. An investigation of the numeric values of the water-solubility enhancement by the different DESs for various drugs indicates that DESs are indeed effective co-solvents, with varying degrees of solubility enhancement, even up to 15-fold. This is strongly encouraging, indicating the need for further studies to find the most promising DESs for solubility enhancement. However, time-consuming and costly trial and error should be prevented by first screening, using theoretical-based or thermodynamic-based models. Based on this conclusion, the second part of the study is concerned with investigating and suggesting accurate thermodynamic approaches to tackle the phase equilibrium modeling of such systems. For this purpose, a large data bank was collected, consisting of 2009 solubility data of 25 different drugs/APIs mixed with water and 31 different DESs as co-solvents at various DES concentrations, over wide ranges of temperatures at atmospheric pressure. This data bank includes 107 DES + water + drug/API systems in total. The solubility data were then modeled according to the solid-liquid equilibrium framework, using the local composition activity coefficient models of NRTL, and UNIQUAC. The results showed acceptable behavior with respect to the experimental values and trends for all of the investigated systems, with AARD% values of 9.65 % and 14.08 % for the NRTL and UNIQUAC models, respectively. In general, the lower errors of NRTL, as well as its simpler calculation process and the requirement of fewer component parameters, suggest the priority of NRTL over UNIQUAC for use in this field.
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Affiliation(s)
- Atefeh Zarei
- School of Chemical and Petroleum Engineering, Shiraz University, Mollasadra Ave., Shiraz 71348-51154, Iran
| | - Reza Haghbakhsh
- Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, 81746-73441, Isfahan, Iran.
| | - Sona Raeissi
- School of Chemical and Petroleum Engineering, Shiraz University, Mollasadra Ave., Shiraz 71348-51154, Iran.
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Andrade SS, Ferreira RSB, Farias FO, Soares RDP, Costa MC, Corbi PP, Meirelles AJA, Batista EAC, Maximo GJ. Solid-liquid equilibria of triacylglycerols and vitamin E mixtures. Food Res Int 2023; 173:113440. [PMID: 37803766 DOI: 10.1016/j.foodres.2023.113440] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/21/2023] [Accepted: 09/07/2023] [Indexed: 10/08/2023]
Abstract
Oils and fats are important ingredients for food and pharmaceutical industries. Their main compounds, such as triacylglycerols (TAG), are responsible for determining their physical properties during food storage and consumption. Lipid-rich foods are also sources of minority compounds, which is the case of vitamin E, mainly represented by (±)-α-tocopherol. These compounds can interact with the main lipid molecules in food formulation leading to modification on lipids' physicochemical properties during processes, storage, as well as during digestion, possibly altering their nutritional functionalities, which is the case of vitamin E antioxidant abilities, but also their solubility in the systems. In this case, the study of the phase-behavior between (±)-α-tocopherol and lipid compounds can elucidate these physicochemical changings. Therefore, this work was aimed at determining the solid-liquid equilibrium (SLE) of binary mixtures of TAG (tripalmitin, triolein and tristearin) and (±)-α-tocopherol including the complete description of their phase diagrams. Melting data were evaluated by Differential Scanning Calorimetry, Microscopy, X-Ray Diffraction, and thermodynamic modeling by using Margules, UNIFAC, and COSMO-SAC models. Experimental results showed that systems presented a monotectic-like behavior, with a significant decreasing in TAG melting temperature by the addition of (±)-α-tocopherol. This high affinity and attractive strengths between these molecules were also observed by thermodynamic modeling, whose absolute deviations were below 2 %. Micrographs and X-ray diffraction evidenced the possible formation of solid solutions. Both behaviors are interesting by avoiding phase separation on food in solid and liquid phases, possibly improving the antioxidant role the (±)-α-tocopherol in lipid-base systems.
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Affiliation(s)
- Sabrina S Andrade
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862, Campinas, SP, Brazil.
| | - Ramon S B Ferreira
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862, Campinas, SP, Brazil.
| | - Fabiane O Farias
- Department of Chemical Engineering, Polytechnique Center, Federal University of Paraná (UFPR), 81531-990, Curitiba, PR, Brazil.
| | - Rafael de P Soares
- Department of Chemical Engineering, Federal University of Rio Grande do Sul (UFRGS), 90035-007, Porto Alegre, RS, Brazil.
| | - Mariana C Costa
- Department of Process and Products Development, School of Chemical Engineering, University of Campinas (UNICAMP), 13083-852, Campinas, SP, Brazil.
| | - Pedro P Corbi
- Department of Inorganic Chemistry, Institute of Chemistry, University of Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil.
| | - Antonio J A Meirelles
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862, Campinas, SP, Brazil.
| | - Eduardo A C Batista
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862, Campinas, SP, Brazil.
| | - Guilherme J Maximo
- Department of Food Engineering and Technology, School of Food Engineering, University of Campinas (UNICAMP), 13083-862, Campinas, SP, Brazil.
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Collin M, Song Y, Prentice DP, Arnold RA, Ellison K, Simonetti DA, Bauchy M, Sant GN. Fly ash degree of reaction in hypersaline NaCl and CaCl 2 brines: Effects of calcium-based additives. Waste Manag 2023; 170:103-111. [PMID: 37562200 DOI: 10.1016/j.wasman.2023.08.002] [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: 11/21/2022] [Revised: 07/15/2023] [Accepted: 08/02/2023] [Indexed: 08/12/2023]
Abstract
The pozzolanic reaction of fly ashes with calcium-based additives can be effectively used to solidify and chemically stabilize (S&S process) highly concentrated brines inside a cementitious matrix. However, complex interactions between the fly ash, the additive, and the brine typically affect the phases formed at equilibrium, and the resulting solid capacity to successfully encapsulate the brine and its contaminants. Here, the performances of two types of fly ash (a Class C and Class F fly ash) are assessed when combined with different additives (two types of cement, or lime with and without NaAlO2), and two types of brine (NaCl or CaCl2) over a range of concentrations (0 ≤ [Cl-] ≤ 2 M). The best performing matrices - i.e., the matrices with the highest Cl-containing phases content - were identified using XRD and TGA. The experimental results were then combined with thermodynamic modeling to dissociate the contribution of the fly ash from that of the additives. All results were implemented in a machine learning model that showed good accuracy at predicting the fly ash degree of reaction, allowing for the robust prediction of extended systems performance when combined with thermodynamic modeling.
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Affiliation(s)
- Marie Collin
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA; Institute for Carbon Management, University of California, Los Angeles, CA, USA.
| | - Yu Song
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA; Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA
| | - Dale P Prentice
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA; Institute for Carbon Management, University of California, Los Angeles, CA, USA
| | - Ross A Arnold
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA; Institute for Carbon Management, University of California, Los Angeles, CA, USA
| | - Kirk Ellison
- Electric Power Research Institute, Charlotte, NC 28262, USA
| | - Dante A Simonetti
- Institute for Carbon Management, University of California, Los Angeles, CA, USA; Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA, USA
| | - Mathieu Bauchy
- Institute for Carbon Management, University of California, Los Angeles, CA, USA; Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA
| | - Gaurav N Sant
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA; Institute for Carbon Management, University of California, Los Angeles, CA, USA; Department of Materials Science and Engineering, University of California, Los Angeles, CA, USA; California Nanosystems Institute (CNSI), University of California, Los Angeles, CA, USA.
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Korth B, Pereira J, Sleutels T, Harnisch F, Heijne AT. Comparing theoretical and practical biomass yields calls for revisiting thermodynamic growth models for electroactive microorganisms. Water Res 2023; 242:120279. [PMID: 37451189 DOI: 10.1016/j.watres.2023.120279] [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: 11/10/2022] [Revised: 06/12/2023] [Accepted: 06/26/2023] [Indexed: 07/18/2023]
Abstract
Research on electroactive microorganisms (EAM) often focuses either on their physiology and the underlying mechanisms of extracellular electron transfer or on their application in microbial electrochemical technologies (MET). Thermodynamic understanding of energy conversions related to growth and activity of EAM has received only a little attention. In this study, we aimed to prove the hypothesized restricted energy harvest of EAM by determining biomass yields by monitoring growth of acetate-fed biofilms presumably enriched in Geobacter, using optical coherence tomography, at three anode potentials and four acetate concentrations. Experiments were concurrently simulated using a refined thermodynamic model for EAM. Neither clear correlations were observed between biomass yield and anode potential nor acetate concentration, albeit the statistical significances are limited, mainly due to the observed experimental variances. The experimental biomass yield based on acetate consumption (YX/ac = 37 ± 9 mgCODbiomass gCODac-1) was higher than estimated by modeling, indicating limitations of existing growth models to predict yields of EAM. In contrast, the modeled biomass yield based on catabolic energy harvest was higher than the biomass yield from experimental data (YX/cat = 25.9 ± 6.8 mgCODbiomass kJ-1), supporting restricted energy harvest of EAM and indicating a role of not considered energy sinks. This calls for an adjusted growth model for EAM, including, e.g., the microbial electrochemical Peltier heat to improve the understanding and modeling of their energy metabolism. Furthermore, the reported biomass yields are important parameters to design strategies for influencing the interactions between EAM and other microorganisms and allowing more realistic feasibility assessments of MET.
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Affiliation(s)
- Benjamin Korth
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research GmbH - UFZ, Permoserstr. 15, Leipzig 04318, Germany.
| | - João Pereira
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9 8911, MA, Leeuwarden, The Netherlands; Environmental Technology, Wageningen University, Bornse Weilanden 9, P.O. Box 17 6700 AA, Wageningen, The Netherlands
| | - Tom Sleutels
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9 8911, MA, Leeuwarden, The Netherlands; Faculty of Science and Engineering, University of Groningen, Nijenborgh 4 9747 AG, Groningen, The Netherlands
| | - Falk Harnisch
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research GmbH - UFZ, Permoserstr. 15, Leipzig 04318, Germany
| | - Annemiek Ter Heijne
- Environmental Technology, Wageningen University, Bornse Weilanden 9, P.O. Box 17 6700 AA, Wageningen, The Netherlands
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Khvostikov V, Khvostikova O, Potapovich N, Vlasov A, Salii R. Estimation of interaction parameters in the Al-Ga-As-Sn-Bi system. Heliyon 2023; 9:e18063. [PMID: 37483788 PMCID: PMC10362131 DOI: 10.1016/j.heliyon.2023.e18063] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/05/2023] [Accepted: 07/05/2023] [Indexed: 07/25/2023] Open
Abstract
The development of GaAs based high power side-input photovoltaic converters requires thick (50-100 μm) transparent gradient refraction layers that can be grown by liquid phase epitaxy. Such thick layers can also be used in LED structures. To solve the problem of AlxGa1-xAs conductivity reduction at the x∼40% point a five-component, Al-Ga-As-Sn-Bi system is proposed. The interaction parameters in the liquid phase (αij) in the Al-Ga-As-Sn-Bi system are determined within the framework of a quasi-regular solutions model. For an AlxGa1-xAs solid solution growing from a Ga-melt containing 10 at.% of Bi (as a neutral solvent) and 15 at.% of Sn (as an n-type dopant), liquidus and solidus isotherms for 900 °C are modeled based on the calculated αij. Satisfactory agreement between calculated and experimental data has been obtained. Hall data show that AlGaAs layers grown from Bi-containing melts have n-type conductivity. Doping by tin during growth from mixed Ga-Bi melts makes it possible to increase the electron concentration in the AlGaAs layer.
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Soldatova E, Sidkina E, Dong Y, Ivanov V, Li J, Sun Z. Arsenic in groundwater of the Poyang Lake area (China): aqueous species and health risk assessment. Environ Geochem Health 2023; 45:2917-2933. [PMID: 36115000 DOI: 10.1007/s10653-022-01391-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 09/04/2022] [Indexed: 06/01/2023]
Abstract
Arsenic is a pervasive pollutant in groundwater, affecting more than 100 million people in 50 countries, including China. Toxicological analysis of As is complicated because As exists in the environment in a variety of forms and redox states. Here, a thermodynamic equilibrium model was used to calculate As speciation, investigate pathways of As accumulation and assess the risk of adverse health effects from oral ingestion of dissolved As from shallow groundwater in the Poyang Lake area (China). The accumulation of As, Fe, and NH4+ in the studied shallow groundwater was found to be the result of the dissolution of As-containing Fe, and probably Mn, (oxyhydr)oxides under reducing conditions due to excess influx of organic matter into the shallow aquifer. Modeling showed that As(III), which is more toxic than As(V), predominated at nearly all sampling sites, regardless of redox conditions. Arsenic tends to accumulate in the highest concentrations as neutral species (As(OH)30, HAsO20) under Eh < 50 mV. In the lower reaches of the Ganjiang and Xiushui Rivers, an increased non-carcinogenic risk from oral ingestion of As from drinking water was observed. The elevated cancer risk was found to be present throughout the study area. The lower reaches of the Ganjiang and Xiushui Rivers that have been shown to have the highest risk of both non-carcinogenic and carcinogenic adverse health effects are associated with more toxic As(III) species. Given the As speciation and risk profile, it is recommended to introduce strategies to alter redox conditions in shallow groundwater by adopting safer irrigation practices and managing fertilizer applications to avoid the buildup of high As concentrations associated with adverse health effects.
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Affiliation(s)
| | - Evgeniya Sidkina
- Vernadsky Institute of Geochemistry and Analytical Chemistry, 19 Kosygina street, Moscow, Russia, 119991
| | - Yihui Dong
- East China University of Technology, 418 Guanglan Avenue, Nanchang, 330013, China
| | - Vladimir Ivanov
- University of Tyumen, 6 Volodarskogo Street, Tyumen, Russia, 625003
| | - Jiale Li
- East China University of Technology, 418 Guanglan Avenue, Nanchang, 330013, China
| | - Zhanxue Sun
- East China University of Technology, 418 Guanglan Avenue, Nanchang, 330013, China
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Perdrial N, Vázquez-Ortega A, Reinoso-Maset E, O'Day PA, Chorover J. Effects of flow on uranium speciation in soils impacted by acidic waste fluids. J Environ Radioact 2022; 251-252:106955. [PMID: 35772319 DOI: 10.1016/j.jenvrad.2022.106955] [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: 11/08/2021] [Revised: 06/07/2022] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
Radioactive acidic liquid waste is a common byproduct of uranium (U) and plutonium (Pu) enrichment and recycling processes whose accidental and planned release has led to a significant input of U into soils and sediments across the world, including at the U.S. DOE's Hanford site (WA, USA). Because of the particularly hazardous nature of U, it is important to predict its speciation when introduced into soils and sediments by acidic waste fluids. Of fundamental importance are the coupled effects of acid-driven mineral transformation and reactive transport on U speciation. To evaluate the effect of waste-fluid residence time and co-associated dissolved phosphate concentrations on U speciation in impacted soils and sediments, uncontaminated surface materials (from the Hanford Site) were reacted with U-containing synthetic acidic waste fluids (pH 2) amended with dissolved phosphate concentrations in both batch (no flow) and flow-through column systems for 7-365 days. By comparing dissolved U behavior and solid phase speciation as a function of flow regimen, we found that the availability of proton-promoted dissolution products (such as Si) to sequester U into uranyl silicates was dependent on waste fluid-sediment contact time as uranyl silicates were not detected in short contact time flow-through systems but were detected in no-flow, long contact time, reactors. Moreover, the dominance of uranyl phosphate as neoprecipitate U scavenger (principally in the form of meta-ankoleite) in phosphate amended systems confirmed the importance of phosphate amendments for an efficient sequestration of U in the soils and sediments. Overall, our experiments suggest that the formation of uranyl silicates in soils impacted by acidic waste fluids is likely to be limited unless reaction products are allowed to accumulate in soil pores, highlighting the importance of investigating soil U speciation in flow-through, transport-driven systems as opposed to no-flow, batch systems. This study provides insights into uranium speciation and its potential changes under acidic conditions for better prediction of risks and subsequent development of efficient remediation strategies.
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Affiliation(s)
- Nicolas Perdrial
- Department of Environmental Science, University of Arizona, 1177 East Fourth Street, Tucson, AZ, 85721, USA; Department of Geography & Geosciences, University of Vermont, 180 Colchester Avenue, Burlington, Vermont 05405, USA.
| | - Angélica Vázquez-Ortega
- Department of Environmental Science, University of Arizona, 1177 East Fourth Street, Tucson, AZ, 85721, USA
| | - Estela Reinoso-Maset
- Sierra Nevada Research Institute, University of California Merced, 5200 North Lake Road, Merced, CA, 95343, USA; Centre for Environmental Radioactivity CoE, Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1432 Aas, Norway
| | - Peggy A O'Day
- Sierra Nevada Research Institute, University of California Merced, 5200 North Lake Road, Merced, CA, 95343, USA; Life and Environmental Sciences Department, School of Natural Sciences, University of California - Merced, 5200 North Lake Road, Merced, CA, 95343, USA
| | - Jon Chorover
- Department of Environmental Science, University of Arizona, 1177 East Fourth Street, Tucson, AZ, 85721, USA
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Yue R, An C, Ye Z, Chen X, Lee K, Zhang K, Wan S, Qu Z. Exploring the characteristics, performance, and mechanisms of a magnetic-mediated washing fluid for the cleanup of oiled beach sand. J Hazard Mater 2022; 438:129447. [PMID: 35780732 DOI: 10.1016/j.jhazmat.2022.129447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 04/20/2022] [Revised: 06/07/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
In the present study, an innovative, environmentally benign recyclable, and magnetically mediated surface washing fluid based on water-dispersible magnetite nanoparticles has been designed and investigated for the cleanup of oiled beach sand. The characterization results showed that the as-prepared magnetite nanoparticles had a spherical morphology with an average diameter of around 250 nm and the particle surface was successfully functionalized with carboxyl groups. The magnetite nanoparticles could be easily re-dispersed by lightly shaking the dispersion after withdrawing the magnet. In addition, prolonging the magnetic field strength and response time promoted the oil recovery from the washing effluent. Thermodynamic modeling was applied to theoretically elucidate the mechanism and the results were in alignment with the experimental findings. Four mechanisms were identified to likely affect surface washing performance. The magnetic fluid had a relatively low operation cost and good reusability for a number of multiple cycles. In terms of other operational limitations, it was noted that washing performance declined as clay (kaolinite) concentrations and salinity values increased. Based on these findings, the proposed stable, low-cost magnetite fluid formulation warrants further investigation as the basis for an operational system for the cleanup of sand beaches contaminated by oil spills.
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Affiliation(s)
- Rengyu Yue
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada
| | - Chunjiang An
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada.
| | - Zhibin Ye
- Department of Chemical and Materials Engineering, Concordia University, Montreal, H3G 1M8, Canada
| | - Xiujuan Chen
- Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, A1B 3X5, Canada
| | - Kenneth Lee
- Fisheries and Oceans Canada, Ecosystem Science, Ottawa, K1A 0E6, Canada
| | - Kaiqiang Zhang
- Institute of Energy, Peking University, Beijing, 100871, China
| | - Shuyan Wan
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada
| | - Zhaonian Qu
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada
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12
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Bouaouina K, Barras A, Bezzi N, Amin MA, Szunerits S, Boukherroub R. Adsorption-reduction of Cr(VI) onto unmodified and phytic acid-modified carob waste: Kinetic and isotherm modeling. Chemosphere 2022; 297:134188. [PMID: 35257706 DOI: 10.1016/j.chemosphere.2022.134188] [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: 09/24/2021] [Revised: 02/23/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
Carob waste (CW) is an agro-biomass material abundant in nature with potential use for eco-friendly remediation. However, like many biomass-based adsorbents, it suffers from its low adsorption capacity for organic/inorganic pollutants. Therefore, modification using physical and/or chemical means is commonly applied to improve the adsorptive properties of biomass-based adsorbents. In this study, carob waste (CW) and carob waste functionalized with phytic acid (PA-CW), as an ecofriendly product, were applied for the first time for Cr(VI) elimination. Various methods were applied for the material characterization like Fourier-transform infrared spectroscopy, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA and DTG), X-ray photoelectron spectroscopy (XPS), specific surface area and porosity measurements. The results proved that both CW and PA-CW own appropriate features for efficient adsorption. Bach experiments revealed that the optimum parameters for Cr(VI) (100 mg/mL) removal at 25 °C were pH 2, 0.05 and 0.025 g as adsorbent dose for CW and PA-CW, respectively, over 120 min contact time. The kinetic of adsorption was well-described by the pseudo-second order model, whereas the isotherm modeling fitted well the modified Langmuir model. CW and PA-CW achieved respectively maximum adsorption capacities of 212.4 and 387.9 mg/g, which are among the highest values so far reported for biomass-based adsorbent materials. These results confirmed that CW and PA-CW could be alternative cost-effective adsorbents even for high concentrations of Cr(VI) in industrial wastewaters along with their reduction capacity.
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Affiliation(s)
- Kenza Bouaouina
- Laboratoire de Technologie des Matériaux et de Génie des Procédés (LTMGP), Université de Bejaia, 06000, Bejaia, Algeria; Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000 Lille, France
| | - Alexandre Barras
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000 Lille, France
| | - Nacer Bezzi
- Laboratoire de Technologie des Matériaux et de Génie des Procédés (LTMGP), Université de Bejaia, 06000, Bejaia, Algeria
| | - Mohammed A Amin
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Sabine Szunerits
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000 Lille, France
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000 Lille, France.
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13
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Cecchini M, Changeux JP. Nicotinic receptors: From protein allostery to computational neuropharmacology. Mol Aspects Med 2021; 84:101044. [PMID: 34656371 DOI: 10.1016/j.mam.2021.101044] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/28/2021] [Accepted: 09/30/2021] [Indexed: 11/15/2022]
Abstract
We propose an extension and further development of the Monod-Wyman-Changeux model for allosteric transitions of regulatory proteins to brain communications and specifically to neurotransmitters receptors, with the nicotinic acetylcholine receptor (nAChR) as a model of ligand-gated ion channels. The present development offers an expression of the change of the gating isomerization constant caused by pharmacological ligand binding in terms of its value in the absence of ligands and several "modulation factors", which vary with orthosteric ligand binding (agonists/antagonists), allosteric ligand binding (positive allosteric modulators/negative allosteric modulators) and receptor desensitization. The new - explicit - formulation of such "modulation factors", provides expressions for the pharmacological attributes of potency, efficacy, and selectivity for the modulatory ligands (including endogenous neurotransmitters) in terms of their binding affinity for the active, resting, and desensitized states of the receptor. The current formulation provides ways to design neuroactive compounds with a controlled pharmacological profile, opening the field of computational neuro-pharmacology.
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Affiliation(s)
- Marco Cecchini
- Institut de Chimie de Strasbourg, UMR7177, CNRS, Université de Strasbourg, F-67083, Strasbourg Cedex, France.
| | - Jean-Pierre Changeux
- Kavli Institute for Brain & Mind University of California, San Diego La Jolla, CA, 92093, USA; Institut Pasteur, URA 2182, CNRS, F-75015, France; Collège de France, F-75005 Paris, France.
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14
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Diaz Caselles L, Roosz C, Hot J, Blotevogel S, Cyr M. Immobilization of molybdenum by alternative cementitious binders and synthetic C-S-H: An experimental and numerical study. Sci Total Environ 2021; 789:148069. [PMID: 34323832 DOI: 10.1016/j.scitotenv.2021.148069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/09/2021] [Accepted: 05/23/2021] [Indexed: 06/13/2023]
Abstract
Excavation operations during construction produce millions of tons of soil sometimes with high leachable molybdenum (Mo) contents, that can lead to risks for both human health and the environment. It is therefore necessary to immobilize the Mo in excavated soils to reduce pollution and lower the costs of soil disposal. This paper studies the immobilization of Mo by three cementitious binders. To this end, one Ordinary Portland cement (OPC), one binder composed of 90% ground granulated blast furnace slag (GGBS) and 10% OPC, and one supersulfated GGBS binder were spiked with sodium molybdate at six different Mo concentrations from 0.005 wt% to 10 wt% before curing. In addition, to gain mechanistic insights, the capacity of synthetic calcium silicate hydrates (C-S-H) to immobilize Mo was studied. This study was completed by thermodynamic modeling to predict the immobilization of Mo at low Mo concentrations (<0.005 wt%). Paste leaching tests results showed that more than 74% of the initial Mo spike was immobilized by the three binders. The supersulfated GGBS binder consistently showed the highest retention levels (92.0 to 99.7%). The precipitation of powellite (CaMoO4) was the dominant mechanism of Mo retention in all binders and most leaching solutions were oversaturated with respect to powellite. Also, in C-S-H syntheses, Mo was largely immobilized (>95%) by the coprecipitation of powellite. Thermodynamic modeling was in good agreement with measured values when the equilibrium constant of powellite was modified to LogK = -7.2. This suggested that powellite is less stable in cementitious environments than would be expected from thermodynamic databases. Moreover, modeling showed that, for a solution at equilibrium with portlandite or C-S-H, the Mo concentration is limited to 1.7 mg/L by powellite precipitation. In contrast, for a solution saturated with respect to ettringite, the threshold concentration for powellite precipitation is 6.5 mg/L.
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Affiliation(s)
- Laura Diaz Caselles
- LMDC, INSA/UPS Génie Civil, 135 Avenue de Rangueil, 31077 Toulouse cedex 04, France.
| | - Cédric Roosz
- LMDC, INSA/UPS Génie Civil, 135 Avenue de Rangueil, 31077 Toulouse cedex 04, France
| | - Julie Hot
- LMDC, INSA/UPS Génie Civil, 135 Avenue de Rangueil, 31077 Toulouse cedex 04, France
| | - Simon Blotevogel
- LMDC, INSA/UPS Génie Civil, 135 Avenue de Rangueil, 31077 Toulouse cedex 04, France
| | - Martin Cyr
- LMDC, INSA/UPS Génie Civil, 135 Avenue de Rangueil, 31077 Toulouse cedex 04, France
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15
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Jamil A, Ching OP, Iqbal T, Rafiq S, Zia-Ul-Haq M, Shahid MZ, Mubashir M, Manickam S, Show PL. Development of an extended model for the permeation of environmentally hazardous CO 2 gas across asymmetric hollow fiber composite membranes. J Hazard Mater 2021; 417:126000. [PMID: 33992016 DOI: 10.1016/j.jhazmat.2021.126000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/17/2021] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
This study presents an extended thermodynamic and phenomenological combined model to mitigate the environmental hazardous acid gas over composite membranes. The model has been applied to an acid gas such as carbon dioxide (CO2) for its permeation through polyetherimide incorporated montmorillonite (Mt) nanoparticles hollow fiber asymmetric composite membranes. The well-established non-equilibrium lattice fluid (NELF) model for penetrating low molecular weight penetrant in a glassy polyetherimide (PEI) was extended to incorporate the other important polymer/filler system features such as tortuosity in acid gas diffusion pathways resulted from layered filler aspect ratio and concentration. The model mentioned above predicts the behavior of acid gas in PEI-Mt composite membranes based on thermodynamic characteristics of CO2 and PEI and tortuosity due to Mt. The calculated results are compared to experimentally determined values of CO2 permeability through PEI-Mt composite asymmetric hollow fiber membranes at varying transmembrane pressures and Mt concentrations. A reasonable agreement was found between the model predicted behavior and experimentally determined data in terms of CO2 solubility, Mt concentration and aspect ratio were calculated based on average absolute relative error (%AARE). The proposed modified model efficiently predicts the CO2 permeance across MMMs up to 3 wt% Mt loadings and 6 bar pressure with ± 10%AARE.
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Affiliation(s)
- Asif Jamil
- Department of Chemical, Polymer and Composite Materials Engineering, University of Engineering and Technology Lahore (New-Campus), Pakistan
| | - Oh Pei Ching
- CO2 Research Centre (CO2RES), Institute of Contaminant Management, Department of Chemical Engineering, Universiti Teknologi Petronas, Bandar Seri Iskandar, 32610 Perak, Malaysia
| | - Tanveer Iqbal
- Department of Chemical, Polymer and Composite Materials Engineering, University of Engineering and Technology Lahore (New-Campus), Pakistan
| | - Sikander Rafiq
- Department of Chemical, Polymer and Composite Materials Engineering, University of Engineering and Technology Lahore (New-Campus), Pakistan
| | - Muhammad Zia-Ul-Haq
- Department of Chemical, Polymer and Composite Materials Engineering, University of Engineering and Technology Lahore (New-Campus), Pakistan
| | - Muhammad Zubair Shahid
- CO2 Research Centre (CO2RES), Institute of Contaminant Management, Department of Chemical Engineering, Universiti Teknologi Petronas, Bandar Seri Iskandar, 32610 Perak, Malaysia
| | - Muhammad Mubashir
- Department of Petroleum Engineering, Faculty of Computing, Engineering & Technology, School of Engineering, Asia Pacific University of Technology, and Innovation, 57000 Kuala Lumpur, Malaysia
| | - Sivakumar Manickam
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Brunei
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty Science and Engineering, University of Nottingham, Malaysia, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
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16
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Mondal SK, Welz A, Rownaghi A, Wang B, Ma H, Rezaei F, Kumar A, Okoronkwo MU. Investigating the microstructure of high-calcium fly ash-based alkali-activated material for aqueous Zn sorption. Environ Res 2021; 198:110484. [PMID: 33212134 DOI: 10.1016/j.envres.2020.110484] [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: 07/23/2020] [Revised: 09/29/2020] [Accepted: 11/11/2020] [Indexed: 06/11/2023]
Abstract
The performance of adsorbents prepared by alkali activation of high calcium fly ash was investigated for removing aqueous Zn. Two formulations involving the use of NaOH and Na2SiO3 activating solutions were used to prepare the adsorbents that feature different microstructural characteristics. The Zn sorption data indicates a sorption process that is controlled by both chemisorption and intra-particle diffusion. The Na2SiO3-activated material displayed higher sorption rates compared to the NaOH-activated material. The sorption kinetics show strong dependence on the microstructures of the adsorbents, wherein the Na2SiO3-activated material featuring higher contents of amorphous phases (96 %mass) in the hydrated phase assemblage, with attendant improved porosity and surface area, performed better than the NaOH-activated material (86 %mass amorphous phases) which showed higher degree of crystallinity and coarse morphology. The Na2SiO3-activated material exhibited 100% Zn removal efficiency within the first 5 min in all studied initial adsorbate concentrations(corresponding to sorption capacity of up to 200 mg/g), while the NaOH-activated analogue tends to lag, reaching 99.99% Zn removal efficiency after about 240 min in most cases. The two formulations were also examined with thermodynamic modeling and the results agree with experimental data in indicating that the use of alkali-silicate activating solution is most suitable for converting high calcium fly ash into efficient adsorbent for removing aqueous heavy metals.
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Affiliation(s)
- Sukanta K Mondal
- Sustainable Materials Laboratory (SusMatLab), Missouri University of Science and Technology, Rolla, MO, 65409, United States; Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, United States
| | - Adam Welz
- Sustainable Materials Laboratory (SusMatLab), Missouri University of Science and Technology, Rolla, MO, 65409, United States; Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, United States
| | - Ali Rownaghi
- Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, United States
| | - Bu Wang
- Department of Civil & Environment Engineering, University of Wisconsin-Madison, Madison, WI, 53706, United States
| | - Hongyan Ma
- Department of Civil, Architectural & Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, United States
| | - Fateme Rezaei
- Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, United States
| | - Aditya Kumar
- Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, United States
| | - Monday U Okoronkwo
- Sustainable Materials Laboratory (SusMatLab), Missouri University of Science and Technology, Rolla, MO, 65409, United States; Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, United States.
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17
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Gaida M, Franchina FA, Stefanuto PH, Focant JF. Modeling approaches for temperature-programmed gas chromatographic retention times under vacuum outlet conditions. J Chromatogr A 2021; 1651:462300. [PMID: 34134077 DOI: 10.1016/j.chroma.2021.462300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 05/19/2021] [Accepted: 05/22/2021] [Indexed: 12/15/2022]
Abstract
This contribution evaluates the performance of two predictive approaches in calculating temperature-programmed gas chromatographic retention times under vacuum outlet conditions. In the first approach, the predictions are performed according to a thermodynamic-based model, while in the second approach the predictions are conducted by using the temperature-programmed retention time equation. These modeling approaches were evaluated on 47 test compounds belonging to different chemical classes, under different experimental conditions, namely, two modes of gas flow regulation (i.e., constant inlet pressure and constant flow rate), and different temperature programs (i.e., 7 °C/min, 5 °C/min, and 3 °C/min). Both modeling approaches gave satisfactory results and were able to accurately predict the elution profiles of the studied test compounds. The thermodynamic-based model provided more satisfying results under constant flow rate mode, with average modeling errors of 0.43%, 0.33%, and 0.15% across all the studied temperature programs. Nevertheless, under constant inlet pressure mode, lower modeling errors were achieved when using the temperature-programmed retention time equation, with average modeling errors of 0.18%, 0.18%, and 0.31% across the used temperature programs.
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Affiliation(s)
- Meriem Gaida
- University of Liège, Molecular Systems, Organic & Biological Analytical Chemistry Group, 11 Allée du Six Août, 4000 Liège, Belgium
| | - Flavio A Franchina
- University of Liège, Molecular Systems, Organic & Biological Analytical Chemistry Group, 11 Allée du Six Août, 4000 Liège, Belgium; University of Ferrara, Department of Chemistry, Pharmaceutical, and Agricultural Sciences, via L. Borsari 46, 44121 Ferrara, Italy.
| | - Pierre-Hugues Stefanuto
- University of Liège, Molecular Systems, Organic & Biological Analytical Chemistry Group, 11 Allée du Six Août, 4000 Liège, Belgium
| | - Jean-François Focant
- University of Liège, Molecular Systems, Organic & Biological Analytical Chemistry Group, 11 Allée du Six Août, 4000 Liège, Belgium
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Heller A, Pisarevskaja A, Bölicke N, Barkleit A, Bok F, Wober J. The effect of four lanthanides onto a rat kidney cell line (NRK-52E) is dependent on the composition of the cell culture medium. Toxicology 2021; 456:152771. [PMID: 33831499 DOI: 10.1016/j.tox.2021.152771] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/01/2021] [Accepted: 03/31/2021] [Indexed: 11/26/2022]
Abstract
Lanthanide (Ln) exposure poses a serious health risk to animals and humans. In this study, we investigated the effect of 10-9-10-3 M La, Ce, Eu, and Yb exposure onto the viability of rat renal NRK-52E cells in dependence on Ln concentration, exposure time, and composition of the cell culture medium. Especially, the influence of fetal bovine serum (FBS) and citrate onto Ln cytotoxicity, solubility, and speciation was investigated. For this, in vitro cell viability studies using the XTT assay and fluorescence microscopic investigations were combined with solubility and speciation studies using TRLFS and ICP-MS, respectively. The theoretical Ln speciation was predicted using thermodynamic modeling. All Ln exhibit a concentration- and time-dependent effect on NRK-52E cells. FBS is the key parameter influencing both Ln solubility and cytotoxicity. We demonstrate that FBS is able to bind Ln3+ ions, thus, promoting solubility and reducing cytotoxicity after Ln exposure for 24 and 48 h. In contrast, citrate addition to the cell culture medium has no significant effect on Ln solubility and speciation nor cytotoxicity after Ln exposure for 24 and 48 h. However, a striking increase of cell viability is observable after Ln exposure for 8 h. Out of the four Ln elements under investigation, Ce is the most effective. Results from TRLFS and solubility measurements correlate well to those from in vitro cell culture experiments. In contrast, results from thermodynamic modeling do not correlate to TRLFS results, hence, demonstrating that big gaps in the database render this method, currently, inapplicable for the prediction of Ln speciation in cell culture media. Finally, this study demonstrates the importance and the synergistic effects of combining chemical and spectroscopic methods with cell culture techniques and biological methods.
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Affiliation(s)
- Anne Heller
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
| | - Alina Pisarevskaja
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
| | - Nora Bölicke
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
| | - Astrid Barkleit
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328, Dresden, Germany.
| | - Jannette Wober
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Chair of Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217, Dresden, Germany.
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Bortnikova SB, Yurkevich NV, Gaskova OL, Devyatova AY, Novikova II, Volynkin SS, Mytsik AV, Podolinnaya VA. Element transfer by a vapor-gas stream from sulfide mine tailings: from field and laboratory evidence to thermodynamic modeling. Environ Sci Pollut Res Int 2021; 28:14927-14942. [PMID: 33219930 DOI: 10.1007/s11356-020-11529-x] [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: 07/17/2020] [Accepted: 11/03/2020] [Indexed: 06/11/2023]
Abstract
Condensates of vapor-gas streams were collected during field and laboratory experiments for the determination of the volatility of chemical elements in sulfide tailings under ambient conditions. The object of research was the Ursk waste heaps (Kemerovo region, Russia). Field experiments were performed on the top of the heap and in neighboring territories; the elements' concentrations in condensates from the top exceed the background values in 2-3 orders of magnitude. To obtain condensates in the laboratory, the waste material was heated to 60 °С. Laboratory condensate-contended high concentrations Ca, Mg, but Fe, Cd, Mo, Sn, Zr, and W were lower by more than 2 orders of magnitude. Also, chemical elements such as Au, Zr, Cs, U, and Tl were determined in the laboratory condensates at elevated temperatures. Also, solid samples were leached with water at the laboratory. A high positive correlation of condensate compositions with compositions of water extracts obtained from parallel samples was established. The most mobile elements transferred in the steam-gas phase are alkaline (Li, Cs, Na, K), alkaline earth (Ca, Sr), chalcophile metals (Hg, Zn, Cu), and metalloids (As, Sb, Se). The numerical experiment of metal transfer forms using thermodynamic modeling methods has been performed, including those with organic ligands.
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Affiliation(s)
- Svetlana Borisovna Bortnikova
- Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of Russian Academy of Sciences, Koptug ave. 3, Novosibirsk, Russia, 630090
| | - Nataliya Victorovna Yurkevich
- Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of Russian Academy of Sciences, Koptug ave. 3, Novosibirsk, Russia, 630090
| | - Olga Lukinichna Gaskova
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Koptug ave. 3, Novosibirsk, Russia, 630090
| | - Anna Yurevna Devyatova
- Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of Russian Academy of Sciences, Koptug ave. 3, Novosibirsk, Russia, 630090.
| | - Irina Igorevna Novikova
- Novosibirsk Research Institute of Hygiene Rospotrebnadzor, Parkhomenko str.7, Novosibirsk, Russia, 630108
| | - Sergei Sergeevich Volynkin
- Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of Russian Academy of Sciences, Koptug ave. 3, Novosibirsk, Russia, 630090
| | | | - Valentina Alexeevna Podolinnaya
- Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of Russian Academy of Sciences, Koptug ave. 3, Novosibirsk, Russia, 630090
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20
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Kalinitchenko VP, Glinushkin AP, Swidsinski AV, Minkina TM, Andreev AG, Mandzhieva SS, Sushkova SN, Makarenkov DA, Ilyina LP, Chernenko VV, Zamulina IV, Larin GS, Zavalin AA, Gudkov SV. Thermodynamic mathematical model of the Kastanozem complex and new principles of sustainable semiarid protective silviculture management. Environ Res 2021; 194:110605. [PMID: 33316230 DOI: 10.1016/j.envres.2020.110605] [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: 05/21/2020] [Revised: 10/23/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
The Kastanozem complex in the dry steppe of southern Russia underlies an artificially-constructed forest strips. Deep ploughing to a depth of 45 cm was used to process the soil prior to planting. Between 20 and 40 cm depth, soil density was high, 1.57 t m-3. Soil hardness was also high, 440 psi. Soil aggregates greater than 5 cm in size were impermeable to tree roots. The content of such aggregates was high, comprising 35%. The number of tree roots with diameters greater than 0.5 cm that cross the soil profile was as low as 0.15 to 0.3 pcs cm-2. The soil matric potential signifying water availability was low in the vegetation period -0.9 MPa to a depth of 1.0 m. According to modelling experiments, the main salt components in the soil solution drive the transfer of soil organic matter (SOM) and heavy metals (HM). The composition of the soil solution determined by the calcium carbonate equilibrium (CCE) and the association and complexation of ions. ION-3 software was used to calculate the ion equilibrium in the soil solution. Macro-ions Cа2+, Mg2+, SO42-, and CO32- partly bonded as ion pairs. Oversaturation of the soil solution with CaCO3 was calculated according to the analytical content of macro-ion, which was high up to 1000 units, and its value decreased in response to ionic strength, activity, association, complexation, and thermodynamic equilibrium of macro-ions in the soil solution. Oversaturation calculated for Salic Solonetz and Gleyic Solonetz soil solutions was small considering the SOM content. Calculations indicate the profile and lateral loss of C from the soil to the vadose zone. The content of Pb in the soil solution was calculated sirca 75%-80%. The calculated coefficient of Pb2+ association was as high as 52.0. The probability of Pb passivation by SOM in the Kastanozem complex was significant. The probability of uncontrolled transfer and accumulation of HM in the soil and vadose zone was high. Biogeosystem Technique (BGT*) transcendental methodology, an innovative methodology created for stable geomorphological system formation to achieve sustainable agriculture and silviculture, was applied. The BGT* elements were: intra-soil milling of the 30-60 cm soil layer for geophysical conditioning; intra-soil continuously-discrete pulse watering for plants and trees to improve the hydrologic regime. The BGT* methodology reduced HM mobility, controlled biodegradation, enriched nutrient biogeochemical cycling, increased C content, increased soil productivity, and reversible carbon sequester in biological form.
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Affiliation(s)
- Valery P Kalinitchenko
- Institute of Fertility of Soils of South Russia, 346493, Krivoshlykova St., 2, Persianovka, Rostov Region, Russia; All-Russian Research Institute for Phytopathology of the Russian Academy of Sciences, 143050, Institute St., 5, Big Vyazyomy, Moscow Region, Russia.
| | - Alexey P Glinushkin
- All-Russian Research Institute for Phytopathology of the Russian Academy of Sciences, 143050, Institute St., 5, Big Vyazyomy, Moscow Region, Russia
| | | | - Tatiana M Minkina
- Southern Federal University, 344006, Bolshaya Sadovaya str., 105/42, Rostov-on-Don, Russia
| | - Andrey G Andreev
- Institute of Fertility of Soils of South Russia, 346493, Krivoshlykova St., 2, Persianovka, Rostov Region, Russia
| | - Saglara S Mandzhieva
- Southern Federal University, 344006, Bolshaya Sadovaya str., 105/42, Rostov-on-Don, Russia
| | - Svetlana N Sushkova
- Southern Federal University, 344006, Bolshaya Sadovaya str., 105/42, Rostov-on-Don, Russia
| | - Dmitry A Makarenkov
- Institute of Chemical Reagents and High Purity Chemical Substances of the National Research Centre "Kurchatov Institute", 107076, Bogorodsky Val St., 3, Moscow, Russia
| | - Lyudmila P Ilyina
- Southern Scientific Center of the Russian Academy of Sciences, 344006, Chekhova Ave., 41, Rostov-on-Don, Russia
| | - Vladimir V Chernenko
- Institute of Fertility of Soils of South Russia, 346493, Krivoshlykova St., 2, Persianovka, Rostov Region, Russia
| | - Inna V Zamulina
- Southern Federal University, 344006, Bolshaya Sadovaya str., 105/42, Rostov-on-Don, Russia
| | - George S Larin
- Institute of Fertility of Soils of South Russia, 346493, Krivoshlykova St., 2, Persianovka, Rostov Region, Russia
| | - Alexey A Zavalin
- All-Russian Institute for Agrochemistry named after D.N. Pryanishnikov of the Russian Academy of Sciences, 127434, Pryanishnikova St., 31a, Moscow, Russia
| | - Sergey V Gudkov
- Prokhrov General Physics Institute of the Russian Academy of Sciences, 119991, Vavilova St., 38, Moscow, Russia
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21
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Mahmoudabadi SZ, Pazuki G. Application of PC-SAFT EOS for Pharmaceuticals: Solubility, Co-Crystal, and Thermodynamic Modeling. J Pharm Sci 2021; 110:2442-2451. [PMID: 33412168 DOI: 10.1016/j.xphs.2020.12.035] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 12/31/2020] [Indexed: 10/22/2022]
Abstract
In this study, the applicability of the perturbed chain statistical associating fluid theory (PC-SAFT) was evaluated for pharmaceutical compounds. For this purpose, the parameters of the PC-SAFT equation of state (EOS) were regressed by applying the experimental solubility data of 54 pharmaceuticals in pure solvents. The reported errors for train and test data show the suitability of the PC-SAFT EOS. The applicability of the PC-SAFT EOS was explored by its prediction accuracy for the ternary system of medicine in solvent mixtures. The model errors were 23 and 26% for two ternary systems of salicylic acid and lidocaine HCl in solvent mixtures of ethanol and water, respectively. The co-crystal formation of salicylic acid-sulfamethazine in methanol was investigated by the PC-SAFT EOS. Finally, the reaction and crystallization sections for acetaminophen production from p-aminophenol were simulated by accompanying the PC-SAFT EOS and equilibrium assumption. The purification efficiencies for acetaminophen were obtained to be 93-98% for different temperatures.
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Affiliation(s)
- Samane Zarei Mahmoudabadi
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Gholamreza Pazuki
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
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22
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Zhang L, Mishra D, Zhang K, Perdicakis B, Pernitsky D, Lu Q. Electrokinetic study of calcium carbonate and magnesium hydroxide particles in lime softening. Water Res 2020; 186:116415. [PMID: 32927423 DOI: 10.1016/j.watres.2020.116415] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 07/10/2020] [Revised: 08/27/2020] [Accepted: 09/08/2020] [Indexed: 06/11/2023]
Abstract
Significant effort has been made to measure and understand the surface charge of CaCO3 and Mg(OH)2 particles. Many laboratory experiments have been reported on zeta potential of natural and prepared CaCO3 and a few have also been published for Mg(OH)2, however, there are very few reported measurements of zeta potential of CaCO3 and Mg(OH)2 particles at conditions relevant to lime softening, despite lime softening being a common and established process for water treatment. The present study aims to understand the interactions and electrokinetic properties of these two particles in lime softening. Effects of various experimental parameters such as pH, temperature, aging, inorganic carbon (CO32-/HCO3-), and divalent cations (Ca2+/Mg2+) on the electrokinetic properties (i.e. zeta potential) of CaCO3 and Mg(OH)2 particles were individually studied. The interactions between humic acid (mimicking natural organic matter), silicate (representing silica), clay (mimicking suspended solids) and CaCO3/Mg(OH)2 particles were studied, as well as the interactions between CaCO3 and Mg(OH)2. Thermodynamic modeling was used to predict precipitates as a function of solution chemistry and assist with data interpretation. The results provide considerable insight into factors that are of importance to lime softening.
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Affiliation(s)
- Lu Zhang
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada; Stantec Consulting Inc., 200-325 25 Street SE, Calgary, AB, T2A 7H8, Canada
| | - Dinesh Mishra
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Kailun Zhang
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | | | - David Pernitsky
- Stantec Consulting Inc., 200-325 25 Street SE, Calgary, AB, T2A 7H8, Canada
| | - Qingye Lu
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada.
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Stultz C, Jaramillo R, Teehan P, Dorman F. Comprehensive two-dimensional gas chromatography thermodynamic modeling and selectivity evaluation for the separation of polychlorinated dibenzo-p-dioxins and dibenzofurans in fish tissue matrix. J Chromatogr A 2020; 1626:461311. [PMID: 32797814 DOI: 10.1016/j.chroma.2020.461311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/01/2020] [Accepted: 06/03/2020] [Indexed: 12/26/2022]
Abstract
Comprehensive two-dimensional gas chromatography (GC×GC) is a powerful tool for complex separations. The selectivity and sensitivity benefits from thermally modulated GC×GC were applied to the analysis of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). Thermodynamic indices of 50 PCDD/Fs, including the 17 toxic 2378-substituted congeners, were collected and used to model one-dimensional and two-dimensional separations with the Rtx-Dioxin2 and Rxi-17SilMS capillary GC columns. Thermodynamic modeling was used to determine the optimal conditions to take advantage of the selectivity differences between the Rxi-17SilMS and Rtx-Dioxin2 to separate all PCDD/Fs congeners from the 2378-substituted compounds by GC×GC. The modeled elution order patterns closely matched the experimental elution order in 40 of the 45 tetrachlorinated through hexchlorinated compounds analyzed. The heptachlorinated and octachlorinated congeners were not included in the elution order modeling as they are readily resolved from other dioxin congeners. The Rxi-17SilMS crossed with the Rtx-Dioxin2 was able to separate all 2378-substituted compounds in a single separation in a fish matrix. Thirty-three additional PCDD/F congeners were added to the fish matrix that coelute with the 2378-substituted congeners. The Rxi-17SilMS crossed with the Rtx-Dioxin2 was able to fully resolve 11 of the 2378-substituted congeners with the other six congeners exhibiting coelutions with only one other congener.
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Affiliation(s)
- Conner Stultz
- Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802, United States
| | - Roman Jaramillo
- Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802, United States
| | - Paige Teehan
- Department of Biochemistry Microbiology and Molecular Biology, The Pennsylvania State University, 107 Althouse Laboratory, University Park, Pennsylvania 16802, United States
| | - Frank Dorman
- Department of Biochemistry Microbiology and Molecular Biology, The Pennsylvania State University, 107 Althouse Laboratory, University Park, Pennsylvania 16802, United States.
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Jaramillo R, Dorman FL. Retention time prediction of hydrocarbons in cryogenically modulated comprehensive two-dimensional gas chromatography: A method development and translation application. J Chromatogr A 2020; 1612:460696. [PMID: 31892412 DOI: 10.1016/j.chroma.2019.460696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 11/06/2019] [Accepted: 11/07/2019] [Indexed: 11/23/2022]
Abstract
Thermodynamic modeling of GC × GC separations provides a tool for rapid method evaluation and optimization. Separations of 95 hydrocarbons on two cryogenically modulated GC × GC systems (atmospheric outlet and vacuum outlet) are modeled, displaying average second dimension retention time modeling absolute errors of 0.17 s and 0.12 s respectively, and generating modeled chromatograms which sufficiently represent experimental data. A web-based GC × GC modeling routine is presented which allows users to model separations, currently focused on hydrocarbons, with full control over all system parameters. The method translation capabilities of the application are further demonstrated by replicating Piotrowski et al.'s GC × GC-HRT temporal distribution plots of hydraulic fracturing flowback fluid hydrocarbons [28].
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25
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Heller A, Barkleit A, Bok F, Wober J. Effect of four lanthanides onto the viability of two mammalian kidney cell lines. Ecotoxicol Environ Saf 2019; 173:469-481. [PMID: 30802736 DOI: 10.1016/j.ecoenv.2019.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 10/25/2018] [Revised: 01/28/2019] [Accepted: 02/03/2019] [Indexed: 06/09/2023]
Abstract
Exposure to lanthanides (Ln) poses a serious health risk to animals and humans. Since Ln are mainly excreted with urine, we investigated the effect of La, Ce, Eu, and Yb exposure on renal rat NRK-52E and human HEK-293 cells for 8, 24, and 48 h in vitro. Cell viability studies using the XTT assay and microscopic investigations were combined with solubility and speciation studies using ICP-MS and TRLFS. Thermodynamic modeling was applied to predict the speciation of Ln in the cell culture medium. All Ln show a concentration- and time-dependent effect on both cell lines with Ce being the most potent element. In cell culture medium, the Ln are completely soluble and most probably complexed with proteins from fetal bovine serum. The results of this study underline the importance of combining biological, chemical, and spectroscopic methods in studying the effect of Ln on cells in vitro and may contribute to the improvement of the current risk assessment for Ln in the human body. Furthermore, they demonstrate that Ln seem to have no effect on renal cells in vitro at environmental trace concentrations. Nevertheless, especially Ce has the potential for harmful effects at elevated concentrations observed in mining and industrial areas.
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Affiliation(s)
- Anne Heller
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217 Dresden, Germany.
| | - Astrid Barkleit
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - Jannette Wober
- Technische Universität Dresden, School of Science, Faculty of Biology, Institute of Zoology, Molecular Cell Physiology and Endocrinology, Zellescher Weg 20b, 01217 Dresden, Germany.
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26
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Wang JC, Bruttini R, Liapis AI. Insights from a Thermodynamic Study and Its Implications on the Freeze-Drying of Pharmaceutical Solutions Containing Water and tert-Butyl Alcohol as a Cosolvent. PDA J Pharm Sci Technol 2019; 73:247-259. [PMID: 30651336 DOI: 10.5731/pdajpst.2018.009209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In the production of several anticancer drugs, tert-butyl alcohol (TBA) is present as a co-solvent in the aqueous drug solution. In order to ascertain if TBA should be removed beforehand or if it could be retained to facilitate the freeze-drying of the drug solution, it is important to acquire both qualitative and quantitative knowledge of the variations occurring with respect to time in heat and mass transfer during the freeze-drying process. In this work, a thermodynamic model employing the UNIFAC (Dortmund) method was developed to determine the values of the currently experimentally unavailable partial vapor pressures of the binary gas mixture of water and TBA in equilibrium with their frozen solid mixtures. The results agree satisfactorily with relevant experimental measurements and indicate that TBA vapor has constantly higher pressures than water vapor and also promotes the vapor pressure of water during sublimation. The responses of the partial pressures of water and TBA vapors are found, through the analysis of their partial and total differentials, to be increasingly more sensitive to temperature change at elevated temperatures and to compositional change when the mole fraction of water in a frozen binary mixture approaches zero. The increased vapor pressures due to TBA lead to higher total pressures at the moving interface separating the dried and frozen layers, resulting in larger total pressure gradients and convective mass transfer rates in the dried layer during primary drying. But the higher total pressures reduce the magnitude of the bulk diffusivity of the gas mixture, and combined with the smaller Knudsen diffusivity of TBA, the pressures could significantly affect the competing mass transfer mechanisms during freeze-drying. The approach presented in this work could provide a general thermodynamic modeling approach for predicting the vapor pressures of multicomponent vapor mixtures in equilibrium with their multicomponent solid frozen mixtures.LAY ABSTRACT: tert-Butyl alcohol (TBA) is present as a cosolvent in a number of anticancer drug solutions. Its presence is known to affect the freeze-drying process of the drug solutions. In order to determine a better operational policy with respect to the freeze-drying process, a thermodynamic approach was developed in this work to provide the needed data of water and TBA vapors that are currently experimentally unavailable. The results agree satisfactorily with experimental measurements. They indicate that TBA vapor has constantly higher pressures than water vapor, promoting faster sublimation and generating higher total pressures at the moving interface to enhance convective mass transfer during primary drying. However, the higher total pressures also reduce the magnitude of the bulk diffusivity of the gas mixture, and combined with the smaller Knudsen diffusivity of TBA, these pressures could significantly affect the competing mass transfer mechanisms during freeze-drying. The thermodynamic method and analysis developed in this work are useful in their own physicochemical importance and also provide a necessary component for a new class of freeze-drying mathematical models. Moreover, they could provide a general modeling approach for predicting the vapor pressures of multicomponent vapor mixtures in equilibrium with their frozen solid mixtures.
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Affiliation(s)
- Jee-Ching Wang
- Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, 100 Bertelsmeyer Hall, 1101 North State Street, Rolla, Missouri 65409-1230; and
| | - Roberto Bruttini
- Criofarma-Freeze Drying Equipment, Strada del Francese 97/2L, 10156 Turin, Italy
| | - Athanasios I Liapis
- Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, 100 Bertelsmeyer Hall, 1101 North State Street, Rolla, Missouri 65409-1230; and
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27
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Guo B, Hong Y, Qiao G, Ou J, Li Z. Thermodynamic modeling of the essential physicochemical interactions between the pore solution and the cement hydrates in chloride-contaminated cement-based materials. J Colloid Interface Sci 2018; 531:56-63. [PMID: 30025328 DOI: 10.1016/j.jcis.2018.07.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 06/29/2018] [Accepted: 07/02/2018] [Indexed: 11/21/2022]
Abstract
The chloride transport properties of cement-based materials are determined via the physicochemical interactions between the pore solution and the cement hydrates. Herein, a thermodynamic model based on surface complexation reactions and dissolution/precipitation reactions was established to investigate the essential physicochemical interactions. The effects of chloride concentration, temperature, and saturation degree (the ratio of water volume to pore volume) on the physicochemical interactions were studied in detail using the resulting thermodynamic model. The published experimental results indicate that the resulting thermodynamic model accurately reflects the adsorption capacity of cement hydrates for chloride ions. Thus, this thermodynamic model can be coupled to the transport equations to achieve the durable designs for new reinforced concrete structures (RCSs) or to predict the service life of existing RCSs. It can also optimize corrosion control strategies for RCSs based on the thermodynamics and kinetics of the material.
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28
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Eze PC, Masuku CM. Supporting plots and tables on vapour-liquid equilibrium prediction for synthesis gas conversion using artificial neural networks. Data Brief 2018; 21:1435-44. [PMID: 30456268 DOI: 10.1016/j.dib.2018.10.129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 10/21/2018] [Accepted: 10/25/2018] [Indexed: 11/20/2022] Open
Abstract
This article contains data on vapor–liquid equilibrium modeling of 1533 gas-liquid solubilities divided over sixty binary systems viz. carbon monoxide, carbon dioxide, hydrogen, water, ethane, propane, pentane, hexane, methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol, and 1-hexanol in the solvents phenanthrene, 1-hexadecanol, octacosane, hexadecane and tetraethylene glycol at pressures up to 5.5 MPa and temperatures from 293 to 553 K using literature data. The solvents are considered to be potentially significant in the conversion of synthesis gas through gas-slurry processes. Artificial neural networks limited to one hidden layer and up to five neurons in the hidden layer were used to predict the binary plots.
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Rabadjieva D, Kovacheva A, Tepavitcharova S, Dassenakis M, Karavoltsos S. Trace metals pollution of waters and soils in Kardjali region, Bulgaria. Environ Monit Assess 2018; 190:383. [PMID: 29881918 DOI: 10.1007/s10661-018-6766-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/15/2017] [Accepted: 05/31/2018] [Indexed: 06/08/2023]
Abstract
Trace metals pollution of surface waters and their nearby soils in the metallurgically polluted Kardjali region, Bulgaria, were studied. Thermodynamic modeling including the dissolved organic carbon (DOC) was carried out for evaluating the distribution of metal species in waters and soil solutions. Zn was found to be the most widespread pollutant in the water samples, followed by Cu, Mn, and Cd. Geoaccumulation indices of trace metals for the tested soils were calculated, indicating that regarding Al, Fe, Co, Ni, and Cu all soils are "uncontaminated". The most significant soil pollutant was found to be Cd, with all soils being either "extremely contaminated" by this metal or close to the limit, followed by Pb and Zn. The dynamics of trace metal chemical species distribution in surface waters and in the water-soluble soil fractions, as a result of possible spontaneous precipitations, was calculated by applying different thermodynamic models. Regarding Mn, Co, Ni, and Cd in waters and aqueous soil extracts and Zn in aqueous soil extracts, their free ion species prevailed, being more labile and hence toxic for the ecosystem. In the case of Al, Fe, Cu, Cd, and Pb in the waters and aqueous soil extracts and of Zn in waters, stable organic complexes with bidentate bonds, Me(OH)4- or Me(OH)02 prevailed.
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Affiliation(s)
- Diana Rabadjieva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl.11, 1113, Sofia, Bulgaria.
| | - Antonina Kovacheva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl.11, 1113, Sofia, Bulgaria
| | - Stefka Tepavitcharova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl.11, 1113, Sofia, Bulgaria
| | - Manos Dassenakis
- Department of Chemistry, Laboratory of Environmental Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15784, Athens, Greece
| | - Sotirios Karavoltsos
- Department of Chemistry, Laboratory of Environmental Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15784, Athens, Greece
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30
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Prisciandaro M, Piemonte V, di Celso GM, Ronconi S, Capocelli M. Thermodynamic features of dioxins' adsorption. J Hazard Mater 2017; 324:645-652. [PMID: 27866764 DOI: 10.1016/j.jhazmat.2016.11.038] [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: 07/25/2016] [Revised: 10/30/2016] [Accepted: 11/14/2016] [Indexed: 06/06/2023]
Abstract
In this paper, the six more poisonous species among all congeners of dioxin group are taken into account, and the P-T diagram for each of them is developed. Starting from the knowledge of vapour tensions and thermodynamic parameters, the theoretical adsorption isotherms are calculated according to the Langmuir's model. In particular, the Langmuir isotherm parameters (K and wmax) have been validated through the estimation of the adsorption heat (ΔHads), which varies in the range 20-24kJ/mol, in agreement with literature values. This result will allow to put the thermodynamical basis for a rational design of different process units devoted to dioxins removal.
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Affiliation(s)
- Marina Prisciandaro
- Department of Industrial and Information Engineering and of Economics, University of L'Aquila, Viale Giovanni Gronchi 18, L'Aquila 67100, Italy
| | - Vincenzo Piemonte
- Faculty of Engineering, University Campus Biomedico of Rome, Via Alvaro del Portillo 21, Rome 00128, Italy.
| | | | - Silvia Ronconi
- Arta Abruzzo, Department of L'Aquila, Bazzano (AQ), 67100 L'Aquila, Italy
| | - Mauro Capocelli
- Faculty of Engineering, University Campus Biomedico of Rome, Via Alvaro del Portillo 21, Rome 00128, Italy
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Vakalis S, Patuzzi F, Baratieri M. Thermodynamic modeling of small scale biomass gasifiers: Development and assessment of the ''Multi-Box'' approach. Bioresour Technol 2016; 206:173-179. [PMID: 26855290 DOI: 10.1016/j.biortech.2016.01.060] [Citation(s) in RCA: 5] [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: 12/12/2015] [Revised: 01/19/2016] [Accepted: 01/20/2016] [Indexed: 06/05/2023]
Abstract
Modeling can be a powerful tool for designing and optimizing gasification systems. Modeling applications for small scale/fixed bed biomass gasifiers have been interesting due to their increased commercial practices. Fixed bed gasifiers are characterized by a wide range of operational conditions and are multi-zoned processes. The reactants are distributed in different phases and the products from each zone influence the following process steps and thus the composition of the final products. The present study aims to improve the conventional 'Black-Box' thermodynamic modeling by means of developing multiple intermediate 'boxes' that calculate two phase (solid-vapor) equilibriums in small scale gasifiers. Therefore the model is named ''Multi-Box''. Experimental data from a small scale gasifier have been used for the validation of the model. The returned results are significantly closer with the actual case study measurements in comparison to single-stage thermodynamic modeling.
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Affiliation(s)
- Stergios Vakalis
- Free University of Bolzano, Faculty of Science and Technology, Piazza Università 5, 39100 Bolzano, Italy
| | - Francesco Patuzzi
- Free University of Bolzano, Faculty of Science and Technology, Piazza Università 5, 39100 Bolzano, Italy
| | - Marco Baratieri
- Free University of Bolzano, Faculty of Science and Technology, Piazza Università 5, 39100 Bolzano, Italy
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32
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Suleimenov Y, Ay A, Samee MAH, Dresch JM, Sinha S, Arnosti DN. Global parameter estimation for thermodynamic models of transcriptional regulation. Methods 2013; 62:99-108. [PMID: 23726942 DOI: 10.1016/j.ymeth.2013.05.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 05/21/2013] [Indexed: 01/11/2023] Open
Abstract
Deciphering the mechanisms involved in gene regulation holds the key to understanding the control of central biological processes, including human disease, population variation, and the evolution of morphological innovations. New experimental techniques including whole genome sequencing and transcriptome analysis have enabled comprehensive modeling approaches to study gene regulation. In many cases, it is useful to be able to assign biological significance to the inferred model parameters, but such interpretation should take into account features that affect these parameters, including model construction and sensitivity, the type of fitness calculation, and the effectiveness of parameter estimation. This last point is often neglected, as estimation methods are often selected for historical reasons or for computational ease. Here, we compare the performance of two parameter estimation techniques broadly representative of local and global approaches, namely, a quasi-Newton/Nelder-Mead simplex (QN/NMS) method and a covariance matrix adaptation-evolutionary strategy (CMA-ES) method. The estimation methods were applied to a set of thermodynamic models of gene transcription applied to regulatory elements active in the Drosophila embryo. Measuring overall fit, the global CMA-ES method performed significantly better than the local QN/NMS method on high quality data sets, but this difference was negligible on lower quality data sets with increased noise or on data sets simplified by stringent thresholding. Our results suggest that the choice of parameter estimation technique for evaluation of gene expression models depends both on quality of data, the nature of the models [again, remains to be established] and the aims of the modeling effort.
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Affiliation(s)
- Yerzhan Suleimenov
- Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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Dresch JM, Richards M, Ay A. A primer on thermodynamic-based models for deciphering transcriptional regulatory logic. Biochim Biophys Acta 2013; 1829:946-53. [PMID: 23643643 DOI: 10.1016/j.bbagrm.2013.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 04/24/2013] [Accepted: 04/25/2013] [Indexed: 11/27/2022]
Abstract
A rigorous analysis of transcriptional regulation at the DNA level is crucial to the understanding of many biological systems. Mathematical modeling has offered researchers a new approach to understanding this central process. In particular, thermodynamic-based modeling represents the most biophysically informed approach aimed at connecting DNA level regulatory sequences to the expression of specific genes. The goal of this review is to give biologists a thorough description of the steps involved in building, analyzing, and implementing a thermodynamic-based model of transcriptional regulation. The data requirements for this modeling approach are described, the derivation for a specific regulatory region is shown, and the challenges and future directions for the quantitative modeling of gene regulation are discussed.
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