scholarly journals Advanced technologies for processing liquid waste of galurgical productions

2021 ◽  
Vol 6 (1) ◽  
pp. 1-6
Author(s):  
Volodymyr Mykhaylenko ◽  
◽  
Valentyna Yurchenko ◽  
Oleksiy Antonov ◽  
Olha Lukianova ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Iron Hydroxide ◽  
Liquid Waste ◽  
Iron Compounds ◽  
Inert Anodes ◽  
Advanced Technologies ◽  
Thermodynamic Potentials ◽  
Calculation Results ◽  
Industrial Regions ◽  
Sulfur Containing

The accumulation of highly mineralized waters and brines in the mining-industrial regions of Ukraine carry a threat of salt pollution of underground and surface water sources. Low-waste processing of these waters is prevented by iron compounds, hydrogen sulfide and sulfur-containing organic compounds. The process of accumulation of iron compounds in brines and groundwater in the presence of hydrogen sulfide has been studied. Comparative calculations of the thermodynamic potentials of the corresponding reactions have been carried out. The calculation results are confirmed by experiments on model solutions and brine of the Dombrovsky quarry. To remove iron compounds from brines and other highly mineralized waters, it is proposed to use electrolysis with inert anodes. It was found that 99.9% of iron compounds pass into the precipitate of iron hydroxide (III). At the same time, the overwhelming amount of heavy metals also passes into the sediment.

scholarly journals Dissolution of iron in sodium chloride solution during alternating current polarization

2021 ◽  
Vol 318 (3) ◽  
pp. 51-62
Author(s):  
A. Bayeshova ◽  
◽  
A. Bayeshov ◽  
A. Kadirbayeva ◽  
F. Zhumabay ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Iron Hydroxide ◽  
Alternating Current ◽  
Iron Electrode ◽  
Half Cycle ◽  
Iron Compounds ◽  
Titanium Electrode ◽  
Sodium Chloride Solutions ◽  
Multi Stage ◽  
First Time

Iron compounds are widely used in many industries and engineering, and even in medicine. The existing methods of obtaining iron compounds are multi-stage and complex. The purpose of this work is to obtain iron (II) hydroxide and oxide from metal waste under alternating current action using one and two half-cycles. For the first time, the electrochemical behavior of iron electrode was studied by electrolysis method during alternating current polarization of industrial frequency in sodium chloride solutions. The iron polarization was carried out in pair with titanium, while the current density on the iron electrode varied in the range of 200-1200 A/m2, and on the titanium is in the range of 20-100 kA/m2. It is established that in the anode half-cycle of alternating current, iron is oxidized to form divalent ions. At this moment, the titanium electrode is in the cathode half-cycle, hydrogen is released on it, hydroxyl ions are formed in the cathode space. In the solution, ions interact with iron (II) ions to produce iron hydroxide. At temperatures above 600C, iron (II) hydroxide is dehydrated with the production of iron (II) oxide. The electrolysis was carried out in two electrolyzers connected to each other in parallel with the immersion of pair of “titanium-iron” electrodes into each electrolyzer. The iron dissolution occurs simultaneously in two half-cycles of alternating current and this approach is proposed for the first time. The process productivity increases by more than 1.5 times.

scholarly journals Hydrogen Sulfide Gas Exposure Induces Necroptosis and Promotes Inflammation through the MAPK/NF-κB Pathway in Broiler Spleen

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Qianru Chi ◽  
Dongxu Wang ◽  
Xueyuan Hu ◽  
Shiping Li ◽  
Shu Li
Keyword(s):  
Oxidative Stress ◽  
Hydrogen Sulfide ◽  
Energy Metabolism ◽  
Inflammatory Response ◽  
Human Health ◽  
Mapk Pathway ◽  
Classical Pathway ◽  
Inos Activity ◽  
Mda Content ◽  
Sulfur Containing

Hydrogen sulfide (H2S) is one of the main pollutants in the atmosphere, which is a serious threat to human health. The decomposition of sulfur-containing organics in chicken houses could produce a large amount of H2S, thereby damaging poultry health. In this study, one-day-old broilers were selected and exposed to 4 or 20 ppm of H2S gas (0-3 weeks: 4±0.5 ppm, 4-6 weeks: 20±0.5 ppm). The spleen samples were collected immediately after the chickens were euthanized at 2, 4, and 6 weeks. The histopathological and ultrastructural observations showed obvious necrosis characteristics of H2S-exposed spleens. H2S exposure suppressed GSH, CAT, T-AOC, and SOD activities; increased NO, H2O2, and MDA content and iNOS activity; and induced oxidative stress. ATPase activities and the expressions of energy metabolism-related genes were significantly decreased. Also, the expressions of related necroptosis (RIPK1, RIPK3, MLKL, TAK1, TAB2, and TAB3) were significantly increased, and the MAPK pathway was activated. Besides, H2S exposure activated the NF-κB classical pathway and induced TNF-α and IL-1β release. Taken together, we conclude that H2S exposure induces oxidative stress and energy metabolism dysfunction; evokes necroptosis; activates the MAPK pathway, eventually triggering the NF-κB pathway; and promotes inflammatory response in chicken spleens.

scholarly journals Histochemische Untersuchungen nach subkutaner bzw. intramuskulärer Applikation von hochmolekularen Eisenpolysaccharid-Präparaten bei Saugferkeln

1967 ◽  
Vol 4 (1) ◽  
pp. 58-68
Author(s):  
S. Ueberschär ◽  
W. Bollwahn
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Iron Hydroxide ◽  
The Body ◽  
Trivalent Iron ◽  
Iron Compounds ◽  
Chemical Changes ◽  
Bivalent Iron ◽  
Therapeutic Doses ◽  
Organic Residual

Subcutaneous or intramuscular injections of high molecular weight iron polysaccharides (Myofer 100® and Pigdex 100®) in therapeutic doses were given to pigs. These are taken up in macrophages between 6 and 24 hours following injection. If the material is finely divided, there occurs extracellularly and also in every case intracellularly a quick transformation from trivalent iron hydroxide to bivalent iron compounds; this process is essentially complete two days following injection. The high molecular weight polysaccharide is split off intracellularly from the iron components and is subject to its own chemical changes in the body. Accompanying this, in connection with the intracellular deposition of iron, there occurs the formation of an organic residual agent which is composed of mucopolysaccharides, glycoproteins and a matrix of protein and lipid.

Adsorption Characteristics of Hydrogen Sulfide on Iron Hydroxide-based Adsorbent

2017 ◽  
Vol 34 (5) ◽  
pp. 468-473 ◽  
Author(s):  
Seung Hyeong Ryu ◽  
◽  
Youngjoo Seo ◽  
Joonwoo Park ◽  
Shin Dong Kim ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Iron Hydroxide ◽  
Adsorption Characteristics

“Kansite” = Mackinawite, FeS

CORROSION ◽  
1966 ◽  
Vol 22 (7) ◽  
pp. 191-193 ◽  
Author(s):  
CHARLES MILTON
Keyword(s):  
Hydrogen Sulfide ◽  
High Temperature ◽  
Corrosion Product ◽  
Ore Deposits ◽  
Iron Compounds

Abstract “Kansite” is mackinawite, FeS. References to recent publications establishing this and correctly describing this important corrosion compound are given. Besides appearing as a corrosion product, it occurs naturally in tidal sediments, where hydrogen sulfide reacts with iron or iron compounds and in most high temperature copper and nickel ore deposits. It also has been synthesized in the laboratory. Mackinawite has been observed repeatedly for nearly a century, but until 1963 was generally confused with a similar-appearing but much rarer ore mineral, valleriite, CuFeS2, and was described under that name.

scholarly journals Changes of catalytic mass grains morphology as a result of their surface covering with iron compounds

2018 ◽  
Vol 59 ◽  
pp. 00029
Author(s):  
Maciej Dobrzański ◽  
Andrzej Jodłowski
Keyword(s):  
Iron Hydroxide ◽  
Morphological Characteristics ◽  
Equivalent Diameter ◽  
Groundwater Treatment ◽  
Iron Compounds ◽  
Manganese Compounds ◽  
Surface Covering

There were operational problems of not having the ability to remove manganese compounds in one of the country's groundwater treatment plants, despite the fact that the filters were some years earlier fitted with the Multiman 3M catalytic bed inserts. The paper presents the results of analysis of morphological characteristics of fresh and blocked catalytic grains. An equivalent diameter, circularity, convexity, and compactness were used to describe the morphological characteristics of the catalytic mass grains. The obtained results confirmed the assumption that the grains of the catalytic mass were blocked by iron hydroxide and that the cause of WTP operating problems was the failure of the aerator, which resulted in the penetration of iron hydroxide through the upper sand bed layer into the lower catalytic mass layer.

scholarly journals Immunomodulatory Effects of Glutathione, Garlic Derivatives, and Hydrogen Sulfide

Nutrients ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 295 ◽  
Author(s):  
Camila Rodrigues ◽  
Susan Percival
Keyword(s):  
Cardiovascular Disease ◽  
Hydrogen Sulfide ◽  
Aged Garlic Extract ◽  
Immunomodulatory Effects ◽  
Beneficial Effects ◽  
Health And Disease ◽  
Oxidative Processes ◽  
Sulfur Containing ◽  
Aged Garlic ◽  
Sulfur Containing Compounds

Glutathione and aged garlic extract are sulfur-containing products that play important protective and regulatory roles within the immune system and in oxidative processes. Hydrogen sulfide (H2S), an endogenous, gaseous, signaling transmitter, has also been shown to be involved in the regulation of inflammation. Recent studies have shown that sulfur-containing compounds from garlic have beneficial effects in attenuating outcomes associated with cardiovascular disease and inflammation by a mechanism that may be related to the H2S signaling pathway. In this review, we summarize the main functions of glutathione (GSH), garlic derivatives and H2S and their role in the immune response and impact on health and disease.

scholarly journals Numerical simulation of non-conventional liquid fuels feeding in a bubbling fluidized bed combustor

2013 ◽  
Vol 17 (4) ◽  
pp. 1163-1179
Author(s):  
Milica Mladenovic ◽  
Stevan Nemoda ◽  
Mirko Komatina ◽  
Dragoljub Dakic
Keyword(s):  
Numerical Simulation ◽  
Fluidized Bed ◽  
Liquid Waste ◽  
Liquid Fuels ◽  
Three Phase ◽  
Bubbling Fluidized Bed ◽  
Detailed Simulation ◽  
Calculation Results ◽  
Gas Fuel ◽  
Jet Penetration

The paper deals with the development of mathematical models for detailed simulation of lateral jet penetration into the fluidized bed (FB), primarily from the aspect of feeding of gaseous and liquid fuels into FB furnaces. For that purpose a series of comparisons has been performed between the results of in-house developed procedure- fluid-porous medium numerical simulation of gaseous jet penetration into the fluidized bed, Fluent?s two-fluid Euler-Euler FB simulation model, and experimental results (from the literature) of gaseous jet penetration into the 2D FB. The calculation results, using both models, and experimental data are in good agreement. The developed simulation procedures of jet penetration into the FB are applied to the analysis of the effects, which are registered during the experiments on a fluidized pilot furnace with feeding of liquid waste fuels into the bed, and brief description of the experiments is also presented in the paper. Registered effect suggests that the water in the fuel improved mixing of fuel and oxidizer in the FB furnace, by increasing jet penetration into the FB due to sudden evaporation of water at the entry into the furnace. In order to clarify this effect, numerical simulations of jet penetration into the FB with three-phase systems: gas (fuel, oxidizer, and water vapour), bed particles and water, have been carried out.

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