Clustering of protons as the main factor in increasing the activity of leaching solutions at their electrochemical and photochemical processing

The theoretical substantiation for the proton clustering process during electrochemical and photochemical processing of technological solutions is provided in the paper. This process provides a significant increase in the efficiency of leaching of gold from refractory ores. It was proposed that the chemical processes in aqueous solutions occur not only due to electronic (interelectronic) interactions, but also as a result of proton-electron interactions. The hypothesis is substantiated. Proton-electron interactions play an important role in the destruction and formation of chemical bonds between the solvent and the solute, as well as between dissolved substances. Compounds with a polymer-like structure can be formed during the electrolysis of aqueous solutions of different reagents, containing oxygen dimers (O-O). Hydrated cluster shell of active water molecules is formed around these polymer-like compounds. A metastable region of clustered protons is formed. Water-gas emulsion is formed during electrolysis and irradiatin with UV light. Highly active oxidants such as atomic oxygen, superoxide radical ion, ozone, and hydroxyl radical are synthesized in the gas bubbles. These compounds intensify protonation processes during hydration. The results of experiments on column activation leaching of dispersed gold from large-volume sample of refractory ore from the Pogromnoye deposit prove the validity of the theoretical substantiations.

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The Effect of γ-Al2O3, TiO2 and ZrO2 Supports on Hydrodesulfurization Activity of Transition-Metal Sulfides

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20080945 ◽

2008 ◽

Vol 73 (8-9) ◽

pp. 945-955 ◽

Cited By ~ 6

Author(s):

Luděk Kaluža ◽

Miroslav Zdražil

Keyword(s):

Transition Metal ◽

Aqueous Solutions ◽

Model Reaction ◽

Metal Sulfides ◽

Vacuum Impregnation ◽

Transition Metal Sulfides ◽

Highly Active ◽

System A ◽

Benzothiophene Hydrodesulfurization ◽

Hydrodesulfurization Activity

The transition metals V, Cr, Mn, Fe, Co, Ni, Mo, Ru, Rh, Pd, W, Re, Os, Ir and Pt were deposited from aqueous solutions of their salts onto conventional γ-Al2O3 and unconventional TiO2 and ZrO2 supports by vacuum impregnation and characterized in their sulfided form by a model reaction of benzothiophene hydrodesulfurization. It was found that the TiO2 and ZrO2 supports influenced predominantly positively the resulting activity of relatively low-active metals (V, Cr, Mn, Fe, Co, Ni, Mo, Ru, W and Os), whereas the highly active metals (Rh, Pd, Ir, Pt and Re) were influenced slightly negatively or not at all by those supports compared with the γ-Al2O3-supported system. A significant effect of the supports on the hydrodesulfurization-activity ranking of the transition-metal sulfides studied was ascertained.

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Anatase TiO2 nanoparticle coating on porous COK-12 platelets as highly active and reusable photocatalysts

RSC Advances ◽

10.1039/c6ra06141a ◽

2016 ◽

Vol 6 (52) ◽

pp. 46678-46685 ◽

Cited By ~ 7

Author(s):

L. H. Wee ◽

M. Meledina ◽

S. Turner ◽

K. Custers ◽

S. Kerkhofs ◽

...

Keyword(s):

Mesoporous Silica ◽

Organic Pollutants ◽

Uv Light ◽

Anatase Tio2 ◽

Light Irradiation ◽

Ordered Mesoporous Silica ◽

Nanoparticle Coating ◽

Highly Active ◽

Uv Light Irradiation ◽

Ordered Mesoporous

Coating of anatase TiO2 nanoparticles on ordered mesoporous silica COK-12 platelets for effective photodegradation of various organic pollutants under UV light irradiation.

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Effect of Cyclodextrins on Photodegradation of 4,4-Bis(4-Hydroxyphenyl)Pentanoic Acid under UV Irradiation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.665.455 ◽

2014 ◽

Vol 665 ◽

pp. 455-458

Author(s):

Li Guo ◽

Jin Huang ◽

Jun Wu ◽

Lei Lei Luo

Keyword(s):

Aqueous Solutions ◽

Fluorescence Spectra ◽

High Efficiency ◽

Uv Light ◽

Order Reaction ◽

Pentanoic Acid ◽

Pseudo First Order Reaction ◽

First Order ◽

Inclusion Interaction ◽

Pseudo First Order

The photodegradation of 4,4-bis (4-hydroxyphenyl) pentanoic acid (DPA) with two cyclodextrins (α-CD and β-CD ) in aqueous solutions induced by UV-light was studied in this paper by means of fluorescence spectra and high efficiency liquid chromatography. The result suggested that DPA with α-CD or β-CD formed inclusion compound in aqueous solutions. The photodegradation of DPA with two cyclodextrins or without cyclodextrin was pseudo-first order reaction. The photodegradation of DPA was accelerated by the addition of β-CD in aqueous solutions, but the that of DPA was inhibited in case of adding α-CD. These differences were due to the differences in inclusion interaction of DPA with α-CD or β-CD.

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Novel Bionic Biomembrane Supported by Gold Nanoparticles/Cellulose Hybrid Films

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.84.13 ◽

2012 ◽

Vol 84 ◽

pp. 13-18 ◽

Cited By ~ 3

Author(s):

Zhi Ming Liu ◽

Yuan Lin An ◽

Wen Jian Wu

Keyword(s):

Gold Nanoparticles ◽

Aqueous Solutions ◽

Lipid Membranes ◽

Hybrid Film ◽

Bilayer Lipid Membranes ◽

Hybrid Films ◽

Bilayer Lipid ◽

Long Period ◽

Highly Active ◽

The Stability

As one of the main methods to study biomembranes, the construction of highly active bionic biomembrane systems is very important. Based on the hybrid film of gold nanoparticles and cellulose, a novel system of bionic biomembrane is demonstrated. The ratio effects of lecithin to cholesterin on the stability of bilayer lipid membranes are studied. Lipid solutions that can form stable membranes in the air and in some aqueous solutions are prepared. The bionic biomembranes composed of bilayer lipid membranes and hybrid films of gold nanoparticles and cellulose can be sustained for a long period in aqueous solutions. The bionic biomembranes also exhibit some interesting electrochemical properties.

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Microemulsion solventing-out co-precipitation strategy for fabricating highly active Cu–ZnO/Al2O3 dual site catalysts for reverse water gas shift

Catalysis Science & Technology ◽

10.1039/c9cy02608h ◽

2020 ◽

Vol 10 (8) ◽

pp. 2343-2352

Author(s):

Ziheng Zhen ◽

Wenxiang Tang ◽

Wei (Willy) Chu ◽

Tao Zhang ◽

Li Lv ◽

...

Keyword(s):

Solvent Extraction ◽

Water Gas Shift ◽

Extraction Technology ◽

Highly Active ◽

Reverse Water Gas Shift ◽

New Strategy ◽

Co Precipitation ◽

Water Gas ◽

Dual Site

A new strategy for the preparation of dual site catalysts is introduced, which combines microemulsion technology and anti-solvent extraction technology.

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