Colloids

Lagaly, G.

doi:10.1002/14356007.a07_341

Cited by 3 publications

(2 citation statements)

References 133 publications

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“…The surface properties of minerals, and consequently the behavior of the pore surfaces, depend on particle size and shape. 40,41 Kumar et al 42 demonstrated how surface charge density on kaolinite varies laterally and that the absolute value of the charge density increases close to morphological terminations of the crystal, for example, crystal edges. This is logical; the smaller a kaolinite particle is, the higher the contribution of crystal edges and steps to the average surface charge density.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Composition in the Interface between Clay Mineral Surfaces and Divalent Cation Electrolytes

et al. 2018

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The interfacial free energy of a solid, which determines its adsorption properties, depends on interactions between the surface and the fluid. A change in surface composition can completely change the behavior of the solid. Decades of work have explored adsorption and its effects at solid-fluid interfaces from the macroscopic perspective and using molecular modeling, so the concept of the electric double layer (EDL) is well established in the community. However, direct, molecular level, experimental observations of the composition within the interface region, and its change with time and conditions, are not abundant. We used cryogenic X-ray photoelectron spectroscopy (cryoXPS) to observe the composition in the clay mineral-solution interface region as a function of bulk solution composition, on illite and chlorite in MgCl and CaCl electrolytes, over a range of concentrations (1-125 mM), in situ, on vitrified samples. These samples were prepared from very thin smears of centrifuged wet paste that were instantaneously chilled to liquid N temperature. They preserved the adsorbed solution in its amorphous state, maintaining the location of the ions and water with respect to the solid, without the disruption that occurs during drying or the rearrangement that results as water crystallizes during freezing. With decreasing ionic strength, we could directly monitor the loss of negative charge in the interface region, producing an anion deficiency, as predicted by theory. The Cl/Me ratio dropped below 1 for chlorite at 12-25 mM MeCl and for illite at 75-100 mM. In addition to better understanding of clay mineral behavior in solution, this work demonstrates that only those clay minerals where surface charge density is the same or lower than that for chlorite contribute to a low salinity enhanced oil recovery response (LS EOR). This explains many of the contradictory results from studies about the role of clay minerals in LS EOR.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Composition in the Interface between Clay Mineral Surfaces and Divalent Cation Electrolytes

et al. 2018

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“…Although rarely observed, orthosilicic acid is the main compound of silica and silicates as well as other precursors of silicic acid. Silicic acid plays an important role in biomineralization and technology (Lagaly, 2000).…”

Section: Introductionmentioning

confidence: 99%

Maize Growth and Production Response With A Combination Of Microbial Consortium, NPK, and Ortho Salisic Acid

Syaifuddin,

Adirianto,

Bachtiar

2024

SLJIL

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Corn is one of the most important food crops in the world. Corn has a high nutritional content, such as carbohydrates, proteins, and fats. Corn can also be processed into various food and beverage products. Corn production in Indonesia currently still does not meet national needs, one of the factors that causes this is the low productivity of corn. Various efforts have been made to increase corn productivity, one of which is by using fertilizers. The purpose of this study was to examine the response of corn growth and production with a combination of microbial consortium, NPK, and ortho salicylic acid. This study used experimental research methods. Data collection techniques in this study were carried out by literature study and observation. The data that has been collected is analyzed descriptively. The results showed that the consortium combination of 1 dose of 5 ml + NPK 15 gr + leaf fertilizer 3 ml was significantly different to increase the best growth in leaf area, total plant weight, corn weight, fruit diameter (base and middle). Based on the results of the study, it can be concluded that the consortium combination of 1 dose of 5 ml + NPK 15 gr + Foliar fertilizer 3 ml can increase corn growth and production.

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Dye–Fibre Interactions

2015

Physico‐chemical Aspects of Textile Coloration

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Colloids

Cited by 3 publications

References 133 publications

Composition in the Interface between Clay Mineral Surfaces and Divalent Cation Electrolytes

Composition in the Interface between Clay Mineral Surfaces and Divalent Cation Electrolytes

Maize Growth and Production Response With A Combination Of Microbial Consortium, NPK, and Ortho Salisic Acid

Dye–Fibre Interactions

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