molecular modified mineral solution
Solution chemistry of carbonate minerals and its effects on …
The effects of carbonate minerals (dolomite and siderite) on the flotation of hematite using sodium oleate as a collector were investigated through flotation tests, supplemented by dissolution measurements, solution chemistry calculations, zeta-potential measurements, Fourier transform infrared (FTIR) spectroscopic studies, and X-ray …
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Modification of Clay Minerals for Adsorption Purpose
Compared to the acid modification, the impregnation of clay minerals using base solutions for environmental purpose is seldom used. Sodium hydroxide solution was used to regenerate a spent bleaching earth from an edible oil refinery by Mana et al. . After alkali treatment, the spent bleaching earth was subsequently treated with thermal ...
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Molecular Simulation of Mineral-Solution Interfaces
Dear Colleagues, With the dramatic supercomputing hardware and software progress over the last 10–20 years, the geochemical research community is becoming more and more interested in the application of computational molecular modeling techniques for the studies of minerals and mineral-solution interfaces in order to solve a wide variety …
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Comprehensive review of modified clay minerals for …
La-modified CMs remove phosphate through complex interactions, electrostatic interactions, surface chemical precipitation, and electrostatic-ligand …
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Molecular dynamics simulations to study the adsorption …
Molecular dynamics simulations to study the adsorption damage of modified polyacrylamide in sandstone pores. ... Although previous experiments have analyzed the adsorption of polymer solutions on various mineral surfaces. The adsorption amount is mainly analyzed from the macroscopic level, and the research on the microscopic …
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Molecular simulation of aqueous solutions at clay surfaces
Results on structural, dynamic and thermodynamic properties and phenomena, including hydration complexes of ions, H bonding networks, modification of the water dynamics with respect to the bulk, and the role of water in the cation exchange between interlayer and interparticle pores are presented. We report a molecular …
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Molecular dynamics simulations of dodecane detachment …
Chun et al. proposed that the surface modified NPs hold a higher capacity in detaching oil droplets from the oil-wet mineral surface regardless of their abilities of interfacial tension reduction [46]. In our previous work [35], [42], the three-stage mechanism has been proposed and applied to the hybrid hydrophobic and hydrophilic surface.
ادامه مطلبAdsorption properties and mechanism research of …
In order to explore the adsorption characteristics of phosphorus from molecules with different molecular structures and varying number of phosphate groups on metal-modified biochar, walnut shell biochar was modified with LaCl3 to prepare lanthanum-loaded biochar (BC-La). Adsorption of four polar components, namely phytic …
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Adsorption of polyacrylamides on mineral oxides: Effect of solution …
2.2. Zeta potential measurements. Zeta potential measurements were performed using a Malvern Zetasizer Nano instrument (Malvern Panalytical). Aqueous dispersions of each mineral oxide (0.1 wt%) were prepared in 10 mM KNO 3.Minimal volumes of dilute HNO 3 and KOH were used for pH adjustment. The particle …
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Applications of Chemically Modified Clay Minerals …
This review deals with modification of montmorillonite and other clay-minerals and clays by interacting them with organic cations, for producing slow release formulations of herbicides, and efficient removal …
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Improving nutrition through biofortification–A systematic …
Importance and micronutrient requirements through the life cycle. Food and nutrients are the chemical fuel utilized by the human body for metabolic activities, growth and development ().Macronutrients including carbohydrates, proteins and lipids contribute greatly as the main sources of energy to the human body (24, 25).In contrast, …
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The fed-batch principle for the molecular biology lab: …
While the nutrient limited fed-batch technology is the standard of the cultivation of microorganisms and production of heterologous proteins in industry, despite its advantages in view of metabolic control and high cell density growth, shaken batch cultures are still the standard for protein production and expression screening in molecular …
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Molecular dynamic simulation and DFT computational …
@article{Guediri2020MolecularDS, title={Molecular dynamic simulation and DFT computational studies on the adsorption performances of methylene blue in aqueous solutions by orange peel-modified phosphoric acid}, author={Abderraouf Guediri and Abdallah Bouguettoucha and Derradji Chebli and Nadjib Chafai and Abdeltif Amrane}, …
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ORGANO-MODIFICATION OF MONTMORILLONITE | Clays …
Modification of the surfaces of montmorillonite (Mnt) by organic molecules is an effective method for improving their affinity toward non-aqueous substances, and has …
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Molecular-level understanding of metal ion retention in clay …
According to molecular dynamics simulations and microcalorimetric experiments, the main driving force for Cs + adsorption on the clay mineral surface is not the a priori energetically favourable ...
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13.2: Saturated Solutions and Solubility
Solutions of Molecular Substances in Liquids. The London dispersion forces, dipole–dipole interactions, and hydrogen bonds that hold molecules to other molecules are generally weak. Even so, energy is required to disrupt these interactions. As described in Section 13.1, unless some of that energy is recovered in the formation of new ...
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Genetically Modified Plants: Nutritious, Sustainable, yet …
The engineering of crops promises a long-term sustainable solution and avoids some of the infrastructure problems that hamper the use of supplements and processing techniques (9, 10). Using breeding or molecular approaches to develop crops with higher nutrient concentrations is termed biofortification .
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Correlation between surface charge and hydration on mineral …
Surface charges and hydration are predominant properties of colloidal particles that govern colloidal stability in aqueous suspensions. These properties usually coexist and interact with each other. The correlation between the surface charge and hydration of minerals is summarized on the basis of innovative experimental, …
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Mineral–Biochar Composites: Molecular Structure and …
Dramatic changes in molecular structure, degradation pathway, and porosity of biochar are observed at pyrolysis temperatures ranging from 250 to 550 °C when bamboo biomass is pretreated by iron-sulfate-clay slurries (iron–clay biochar), as compared to untreated bamboo biochar. Electron microscopy analysis of the biochar reveals the …
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Mechanism for the adsorption of Per
Clay minerals are promising adsorbents for PFAS removal from contaminated water, thus it is crucial to understand the interactions between PFAS and clay minerals. This paper performed molecular dynamics simulations to reveal the complex behaviors and fundamental mechanisms of the adsorption of perfluoroalkyl sulfonic …
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Successful intercalation of DNA into CTAB-modified clay minerals …
Montmorillonite (MMT) and rectorite (REC) are clay minerals that consist of hydrated aluminum silicate with Si–O tetrahedrons on the bottom of the layer, Al–O(OH)2 octahedrons on the top, and various exchangeable ions such as Na+ and Ca2+ in interlayer. However, the driving force for intercalation of double-stranded DNA is not …
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Study on the adsorption properties of methyl orange by …
Chrysotile is also a 1:1 layered silicate mineral, which is composed of Mg 6 [Si 4 O 10](OH) 8 layers formed by the combination of Si–O tetrahedron and Mg-OH octahedron 43, as shown in Fig. 2c ...
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Interfacial adhesion performance between the low-density …
However,rat the current stage, the research on adhesion of asphalt binder is limited and there is no established technique which can be used to quantify the adhesive bond strength between the minerals and LDPE modified bitumen at microscale .Only in the past 5 years, some researchers used molecular dynamic (MD) simulations to analyze the effect ...
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Chinese Journal of Chemistry
Polyhedral Oligomeric Silsesquioxanes (POSS)-based Hybrid Materials: Molecular Design, Solution Self-Assembly and Biomedical Applications. Linfeng Fan, Linfeng Fan. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics & Chemistry, Institute of Chemistry, Chinese Academy of Sciences, …
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Chitosan: Structural modification, biological activity and …
The molecular chain of chitosan was rigid or semi-rigid. In the solution, the molecular chain has a rod-like or nearly rod-like conformation. The molecular chain has polar groups such as hydrogen bonds, and also has optical activity, such as containing asymmetric carbon atoms. The molecule had greater anisotropy.
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Molecular mechanics of mineralized collagen fibrils in bone
Mineralized microfibril model. We apply an in silico mineralization scheme based on a Monte Carlo approach, and identify molecular structures of nascent bone for different mineral densities, from ...
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Surface modification at the molecular level in mineral …
Direct information at a molecular level about surface products, their structure and surface distribution is vitally important to perform an efficient separation processes for mineral beneficiation.This information is equally important for the modification of surface properties of industrial minerals for various specific applications such as: …
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Molecular Dynamics Simulation of Alkylammonium-Intercalated
In order to understand the microscopic properties of alkylammonium-intercalated vermiculites, molecular dynamics simulations employing the clayff-CVFF force field were performed to obtain the interlayer structures and dynamics. The layering behavior of alkyl chains was uncovered. With the model used in the present study (1.2 e per unit …
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Molecular Simulation of Minerals-Asphalt Interfacial Interaction
The interfacial interaction between asphalt binder and mineral aggregate makes different components have different diffusion behavior. It influences the performance of interface and consequently that of the mix. In this research, the models of four asphalt components (asphaltene, resin, aromatics and saturate) and five minerals were …
ادامه مطلبMontmorillonite: An Introduction to Properties and Utilization
Clay mineral is an important material available in nature. With an increasing understanding of clay structure, montmorillonite is realized viable for an enhanced …
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