The fresh background solution (0.01 mol/L NaCl) was pumped into the flow cell at 0.25 mL/min to equilibrate the mineral film for at least 30 min. The adsorption process was started by flowing the histidine solution (0.01 mol/L) through the equilibrated film. The histidine solution was of the same pH and ionic strength as the background solution.
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Thus, the mineral-modified BCs can be used over a wide range of pH values and ionic strengths. The BC composites modified with clay minerals are nontoxic (Shi et al., 2021). The adsorption experiment conducted to simulated saline-alkali land showed that the mineral-modified BCs were more suitable for the adsorption of MET than OBC (Table S4 and ...
In order to analyze the interfacial interaction mechanism between the types of mineral and asphalt at the molecular scale, molecular dynamics (MD) simulations were conducted to study the interfacial behavior of three asphalt binders (AS-1, AS-2, AS-3) with five minerals (SiO 2, CaO, MgO, Al 2 O 3, Fe 2 O 3). Thermodynamic properties of asphalt ...
Recent progress in the surface modification of the clay minerals with polymers via physical adsorption and chemical grafting are reviewed. The surface modification of clay minerals especially with polymers could improve markedly their surface physical and chemical properties so the modified clay minerals could be applied as catalysts, adsorbents, in composite …
The CV of the modified anode with the graphite nanoparticles at a concentration of 1.25 g·L −1 had the largest area curve compared with the other anodes with lower graphite …
Based on molecular dynamics simulation, a molecular model of coupling agent-modified phosphogypsum asphalt mortar–water–mineral aggregate was established, and the process of interfacial adhesion between asphalt and mineral aggregate was investigated by simulating different water content conditions, and the diffusion behaviour of water at ...
A fundamental understanding of the interactions between mineral surfaces and amphiphilic surface modification agents is needed for better control over the production and uses of mineral fillers. Here, we controlled the carboxylic acid layer formation conditions on calcite surfaces with high precision via vapor deposition. The properties of the resulting carboxylic …
However, the LDPE modified asphalt binder has frequently encountered the adhesive failures resulting from the adhesion loss at the bitumen-aggregate interface, particularly when subjected to the oxidative ageing conditions. Adhesion is defined as the molecular force of attraction in the area of contact between the adhesive materials and substrates.
The remarkable structural diversity and mechanical strength of mineral phases associated with living organisms (ªbiomineralsº) has prompted substantial effort towards synthetically reproducing the conditions under which such materials are created. ... Hydrogen-Bonded Molecular Ribbons as Templates for the Synthesis of Modified Mineral Phases.
average molecular weight of one million. Flocculation experiments were done in 2 cm diameter and 15 cm long test tubes at a solid content of approximately 5%. The pH of the suspensions was adjusted when required by addition of standard solutions of HNOJ or KOH, and ionic stre~ by addition of KNO] solution. The flocculation re-
In this work, adopting molecular dynamics simulation, three kind of modified nanoparticles grafted with hydrophilic chains (NP1), hydrophobic chains (NP2), and mixed hydrophilic and hydrophobic chains (NP3), were designed to …
This apparatus, constructed from easily obtainable parts, avoids many of the problems inherent in studying mineral/solution reaction kinetics in batch reactors.The hydrolysis of wollastonite ...
Molecular dynamics (MD) ... Assembly of clay mineral platelets, tactoids, and aggregates: effect of mineral structure and solution salinity. J. Colloid Interface Sci., 566 (2020), pp. 163-170, 10.1016/j.jcis.2020.01.084. View PDF View article View in Scopus Google Scholar. ... The Modified Gouy-Chapman Theory: Comparisons between electrical ...
At solution pH between pK a1 and pK a2, ... Giese RF, Aga DS. Investigating the molecular interactions of oxytetracycline in clay and organic matter: insights on factors affecting its mobility in soil. ... Ortiga J. Modified bentonitic clay minerals as adsorbents of CO, CO2 and SO2 gases. Microporous Mesoporous Mater. 2002;56:73–80. doi: 10. ...
Different asphalt and mineral molecular models were presented, and a molecular model of asphalt–mineral aggregate interface was constructed on the basis of molecular simulation technology.
The presence of nano-silica can reduce the sensitivity to moisture damage of asphalt mixtures and improve the anti-oxidation aging ability of asphalt binder. In the present work, the interface adhesion of nano-silica modified asphalt to aggregate surfaces at the different interfacial situations (aggregate surface irregularity and seawater erosion) were investigated …
Clay minerals and their modified derivatives are a family of materials which can be used for the adsorption of most of the chemical contaminants from the aqueous solution . Among this family of adsorbents, those based on montmorillonite have been used as adsorbents for cationic contaminants, including heavy metal cations [ 1 ] and cationic dyes ...
Raw coal was collected from Talcher coal field, India. Chitosan was purchased from Himedia Laboratories Pvt. Ltd., India (molecular weight ∼ 15,000 with minimum 75% degree of deacetylation).Di-ethyl phthalate (molecular weight 222.24, C 12 H 14 0 4 ~ 99%) was purchased from SRL Laboratories Pvt. Ltd., India. All chemicals and reagents used in this study were of …
The Potential of Modified Starches as Mineral Flotation Depressants Brenton Fletcher1 & Wonder Chimonyo1 & Yongjun Peng1 Received: 30 June 2020 /Accepted: 5 January 2021 ... gelatinised solutions; molecular sizes of the polymer chains and their distribution; and functional groups on the glucose monomer unit.
Trace elements ready-made solution, MBD0056, is comprised of vital minerals to support critical bacterial development. The solution is based on Wolin and Wolfe's recipe, which is especially suitable for culturing anaerobic bacteria of the human microbiome ... Molecular Cloning & Protein Expression. Description. General description.
To prepare ultrasonic modified starch (MS) samples, 50 mL CS solutions were placed in a beaker and then sonicated in the water bath for various times (5,10, 15, 20, and 30 min) at room temperature ...
Comprehensive review of modified clay minerals for phosphate management and future prospects. ... In addition, the molecular, hydrogen, and ionic bonds in CM structures are notably weak and typically form silicon–oxygen tetrahedrons and aluminum–oxygen octahedrons with structural unsaturation and isomorphism. ... the H + ions in solution ...
Thermal ageing was carried out through oxidation of solution at 110°C from 0 to 144 h. ... The AC breakdown voltage of modified mineral oil has significantly increased: h-BN 33: 0.1%: ... It was reported that addition of …
In practice, 2 g of mineral sample was added to 360 ml of double distilled water, and the solution pH was regulated for 4 min. Then, the collector solution with the concentration of 3.65 × 10 −4 mol/L was added to the solution and stirred for …
Despite the significant ion association that occurs in solutions across all of the metastable solutions investigated S = 1 − 4, the result that K < 1 means that ion dissociation is thermodynamically favorable in dilute solutions and ion assembly into liquid-like clusters is due to non-idealities in the solution phase. These liquid-like ...
DOI: 10.1016/J.MOLLIQ.2018.04.031 Corpus ID: 103024350; Removal of diethyl phthalate via adsorption on mineral rich waste coal modified with chitosan @article{Shaida2018RemovalOD, title={Removal of diethyl phthalate via adsorption on mineral rich waste coal modified with chitosan}, author={Mohd.
The mineral sample was ground to 2 using a three-head grinder, and 50 mg of the mineral sample below was added to a BYYS solution with a concentration of 100 mg/L at natural pH. The mixture was stirred for 30 min, filtered, washed …
This study aims to evaluate the effects of mineral types and water on the adhesion properties and debonding behaviours of bitumen-mineral interface systems. A molecular dynamics modelling approach was employed to simulate the interactions between minerals and bitumen with and without the presence of water.
interactions between mineral medium and FeS-sediment, to an iron(II) concentration of 10–20 ppm which guarantees good growth of FeOB. The conditions of gassing must be varied …
Mineral–Biochar Composites: Molecular Structure and Porosity
Fe-modified biochar combined with mineral fertilization promotes soil organic phosphorus mineralization by shifting the diversity of phoD-harboring bacteria within soil …
Zeolite, kaolinite and illite are all non-inflatable clay minerals, and because the molecular size of DS is larger than the pore size of the zeolite, it fails to enter the pore of zeolite. ... 50% CEC, CEC, 200% CEC CTAB modified illite with the aqueous solution was tested. The experimental results showed that the contact angles of ...
Kaolin is a natural non-metallic mineral with the ideal chemical formula of Al 2 O 3 –2SiO 2 –2H 2 O, its theoretical chemical composition is 46.54% SiO 2 and 39.5% Al 2 O 3, and it is an ideal natural source of silica-alumina for the synthesis of molecular sieves due to its abundant and low price [[11], [12], [13]].Silva et al. used calcined kaolin as an alternative …
Volpert et al. (1998) described the solution properties and the adsorption behavior of hydrophobically modified polyacrylamides synthesized by micellar copolymerization on clay minerals. Different from homopolyacrylamide, in which a classical high affinity adsorption isotherm was found with a plateau at relatively low concentration, the ...
"Impact of minerals and water on bitumen-mineral adhesion and debonding behaviours using molecular dynamics simulations." Constr. Build. Mater. 171 ... L. Zhang, and Y. Liu. 2018a. "Study on compatibility of rubber powder and asphalt in rubber powder modified asphalt by molecular dynamics." J. Build. Mater. 21 (4): 689–694. Google ...
Characterization of the optimized batch of mineral rich coal modified with chitosan composites (1:1 weight ratio) by different technique: (a) XRD revealing kaolinite and quartz phases in the coal-chitosan composite, which are originated from the coal; (b) composition of the coal-chitosan composite measured by EDX analysis and the corresponding ...
The present chapter, therefore, focuses on few aspects of mineral nutrients, including phenotypic indicators, and molecular regulators of mineral nutrient uptake and assimilation with special reference on roots. ... 5.7 Modified Root ... Rubio F (2010) The Arabidopsis thaliana HAK5 K+ transporter is required for plant growth and K+ acquisition ...
Brand: Thermo ScientificTM OxoidTM Identify members of the coliform group of bacteria in food and water samples with Thermo Scientific™ Oxoid™ Minerals Modified Glutamate Medium (Dehydrated). The mineral content of the medium allows for the superior cultivation and enumeration of coliforms. Minerals Modified Glutamate Medium, Oxoid Composition Typical …
In those studies, some critical points were ignored. Firstly, there can be chemical reactions of mineral particles with solution, which leads to a dynamic change of the ingredients and the structure of surface. And the solution environment surrounding the interface can be dynamic due to the ion exchanges during chemical reactions.