Готові списки джерел за темами / Acidity investigation

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Добірка наукової літератури з теми "Acidity investigation"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Acidity investigation"

Simon, Barbara, László Tolner, Márk Rékási, and Erika Michéli. "Soil acidity investigation by potentiometric titrations." Cereal Research Communications 34, no. 1 (2006): 283–86. http://dx.doi.org/10.1556/crc.34.2006.1.71.

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Buckingham, DA, CR Clark, and A. Nangia. "The Acidity of Norfloxacin." Australian Journal of Chemistry 43, no. 2 (1990): 301. http://dx.doi.org/10.1071/ch9900301.

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A 1H and 13C n.m.r. investigation of the fluoroquinolone carboxylic acid Norfloxacin (1) in D2O has allowed three pKa values to be determined, which correspond to carboxylic acid oxygen (pKaD 0.6), pyridone nitrogen (pKaD 6.9) and 'external' piperazine nitrogen (pKaD 9.25) ionization.

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Glovyn, N. M., and O. V. Pavliv. "Investigation of Causes and Influences of Soil Acidity on Crop Yields in Kozova District, Ternopil Region." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 21, no. 91 (2019): 16–20. http://dx.doi.org/10.32718/nvlvet-a9103.

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The paper covers the causes of occurrence and the methods of investigating soil acidity in Kozova destrict, Ternopil region. It is a highly topical issue, since increased soil acidity negatively influences the growth and the development of most cultivated crops and affects favourable microbiological soil properties. Soil acidity is caused by hydroions that are formed under the dissociation of acids and hydrolytic acid salts and are absorbed by the smallest soil particles – colloids, which can go into interstitial water. The increased soil acidity, which is a limiting factor for the biodiversit

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Ramli, Nur Aainaa Syahirah, and Nor Aishah Saidina Amin. "Ionic Solid Nanomaterials: Synthesis, Characterization and Catalytic Properties Investigation." Advanced Materials Research 699 (May 2013): 155–60. http://dx.doi.org/10.4028/www.scientific.net/amr.699.155.

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A series of ionic solid nanomaterials denoted as IS1, IS2 and IS3 have been prepared using butylmethylimidazolium bromide ([BMIM][Br]) ionic liquid as cation, and three types of heteropolyacid; phosphotungstic acid (H3PW12O40), phosphomolybdic acid (H3PMo12O40), and silicotungstic acid (H4SiW12O40) as anion. The nanomaterials were characterized by FTIR, XRD, SEM, TGA, NH3-TPD and BET. Its catalytic performance was investigated by catalyzing glucose conversion to levulinic acid and hydroxymethylfurfural. It was observed that the ionic solids have higher acidity with semi amorphous structure, hi

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Raimbekova, A., Sh Kubekova, V. Kapralova, et al. "INVESTIGATION OF POSSIBILITY OF MANGANESE ORE CONCENTRATION WASTES INVOLVEMENT IN INORGANIC MATERIALS PRODUCTION." Chemical Journal of Kazakhstan, no. 4 (December 15, 2024): 46–56. https://doi.org/10.51580/2024-4.2710-1185.47.

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Introduction. The problem of processing waste from the mining and metallurgical complex of the Republic of Kazakhstan, including manganese ore processing waste, is relevant both from a technological (expanding the raw material base and assortment of marketable products) and from a geoecological (minimizing waste, preserving resources and the environment) point of view. The purpose of this work is to study the possibility of processing manganese ore processing waste from some deposits in Kazakhstan into phosphating solutions. Results and discussion. Using electron-probe, energy-dispersive X-ray

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Bilanchyn, Ya, L. Goshurenk, and I. Sviderska. "The nature of chornozem soils acidity of Zmiiny island." Visnyk of the Lviv University. Series Geography, no. 39 (December 15, 2011): 22–27. http://dx.doi.org/10.30970/vgg.2011.39.2158.

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Results of substantive and chemical investigation of Zmiiny island chornozem soils as well as their peculiarities, based on acid characteristics, are analyzed. Opinion is expressed about a main role in forming island soils consistence and acidity peculiarities of their basic geological constructions (conglomerates, conglobrectias, sand rock) of extra-acid silicate composition. Key words: Zmiiny island, chornozem soils, soil acidity, chemical rock composition.

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Subramaniam, Sarrvish, Hafisoh Ahmad, Nurfarhanim Abu Bakar, Faranadia Abdul Haris, and Rahisham Abdul Rahman. "The Investigation Of The Synthesis Cooking Oil As A New Power Transformer Oil." Journal of Physics: Conference Series 2523, no. 1 (2023): 012020. http://dx.doi.org/10.1088/1742-6596/2523/1/012020.

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Abstract Background: The mineral oil has been widely used in a power transformer for the purpose of insulation and suppression of corona and arcing. But due to its extremely low flashpoint, this can also cause an explosion in the case of a fire and the mineral oil has been found to be non-biodegradable. In this research, an alternative of mineral oil is proposed, which is the usage of used cooking oil which will undergo chemical modification via transesterification in order to achieve its expected properties which fits into the requirements of the power transformer according to the IEEE standa

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Bugayov, V. D., V. M. Gorenskiy, and V. S. Mamalyga. "Features of formation of formula and seed productivity of collective samples of lucerans of different ecological-geographical origin." Faktori eksperimental'noi evolucii organizmiv 24 (August 30, 2019): 40–43. http://dx.doi.org/10.7124/feeo.v24.1075.

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Aim. Investigation and evaluation of alfalfa samples collection based on the main economic and valuable features for further use in breeding in conditions of high acidity of the soil. Methods. Fields (conducting phenological observations and records), laboratory (accounting for seed productivity), mathematical-statistical (objective estimation of experimental data obtained). Results. According to the results of the research, 30 collection samples genotypes were identified to be tolerant to the acidity of the soil with relatively high fodder and seed yield, which exceeded the standard Syniukha

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Devi, M. M., D. Bhattacharyya, K. N. Das, et al. "Dynamics of Acidity Component of the Soils as Influenced by Liming in Upper Brahmaputra Valley Zone of Assam, India." Ecology, Environment and Conservation 29 (2023): 131–36. http://dx.doi.org/10.53550/eec.2023.v29i02s.025.

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An incubation study was conducted to investigate the effect of lime (CaCO3 )on the acidity components in Upper Brahmaputra Valley Zone (UBVZ) of Assam. Fourteen(14) geo-referenced soil samples were collected from Sibsagar and Jorhat districts of Assam. Soils were treated with 3 different doses of lime viz. 10 per cent Lime Requirement (LR10), 25 per cent Lime Requirement (LR25) and 50 per cent of Lime Requirement (LR50) and initial properties were recorded before liming. Samples were incubated in laboratory at different period of time viz. 15, 30, 60 and 90 days after liming (DAL) with moistur

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McElnea, Angus E., Col R. Ahern, and Neal W. Menzies. "The measurement of actual acidity in acid sulfate soils and the determination of sulfidic acidity in suspension after peroxide oxidation." Soil Research 40, no. 7 (2002): 1133. http://dx.doi.org/10.1071/sr01118.

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Improvements to the routine methods for the determination of actual acidity in suspension for acid sulfate soils (ASS) are introduced. The titratable sulfidic acidity (TSA) results using an improved peroxide-based method were compared with the theoretical acidity predicted by the chromium reducible sulfur method for 9 acid sulfate soils. The regression between these 2 measures of sulfidic acidity was highly significant, the slope of the regression line not significantly different from unity (P = 0.05) and the intercept not significantly different from zero. This contrasts with results of other

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Дисертації з теми "Acidity investigation"

Mohd, Saupi Hanim Salami Binti. "Investigation of the acidity of Brønsted acids in ionic liquids." Thesis, Imperial College London, 2018. http://hdl.handle.net/10044/1/58941.

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The Hammett acidity functions (H0) of mixtures of Brønsted acids-ionic liquids were measured using a 13C NMR probe and several UV-Vis probes. Successful measurements for all of the systems were demonstrated using the UV-Vis probes. A suitable probe was chosen and used to measure each mixture with the estimation of H0 values from the 13C NMR probe. The 13C NMR probe can be used to calculate the acidity of the mixtures approximately while the UV-Vis probe gave more precise results. The H0 of Brønsted acids-ionic liquids systems with different acids were successfully measured using the 13C NMR pr

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Kitto, Abdul-Massih N. "Physico-chemical investigation of acidic and basic gaseous and particulate pollutants in the troposphere." Thesis, University of Essex, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292093.

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Dalton, Catherine Phillippa. "A palaeolimnological investigation of acidity in humic lake waters in Connemara, western Ireland." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393109.

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To, Trang Quynh. "Investigation of the acidity and nucleophilicity of ionic liquid mixtures and their effects on reaction rates." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/11648.

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The Hammett acidity functions (H0) of mixtures of 1-butyl-3-methylimidazolium hydrogensulfate with sulfuric acid, and 1-butylimidazolium hydrogensulfate with sulfuric acid, were measured using UV dyes. A linear correlation between H0 value and the concentration of sulfuric acid was observed for both mixtures. H0 values of the mixtures were also measured using an NMR probe, mesityl oxide. The H0 values calculated from the mesityl oxide experiments agreed well with the H0 values calculated from the UV dye data. 1-Butyl-3-methylimidazolium hydrogensulfate, 1-butylimidazolium hydrogensulfate, 1-bu

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Hu, Bing. "³¹P MAS NMR investigation of surface acidity on silica-alumina catalysts using adsorbed phosphines as new probes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24315.pdf.

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Xie, Jingyi. "Hydrogen production on bimetallic catalysts and local acidity investigation of aluminosilicates and mesoporous silica via single molecule spectroscopy." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/34477.

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Doctor of Philosophy<br>Department of Chemical Engineering<br>Keith L. Hohn<br>The autothermal reforming and partial oxidation of hexadecane via Pt/Ni bimetallic nanoparticles on various ceria-based supports were investigated. Nanoparticles with Pt/Ni molar ratios ranging from 0/100 to 10/90 were loaded on ceria-based supports including cerium oxide, gadolinium-doped cerium oxide and cerium-doped zirconium oxide. The effect of the Pt/Ni molar ratio and the promotional effect of the support were studied by comparing the hydrogen yield. TPR and XPS analysis showed that there was a strong interac

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Lay-Fortenbery, Ashley. "INVESTIGATION OF FACTORS INFLUENCING PROTEIN STABILITY IN LYOPHILIZED FORMULATIONS USING SOLID-STATE NMR SPECTROSCOPY." UKnowledge, 2019. https://uknowledge.uky.edu/pharmacy_etds/105.

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Many proteins are unstable in solution and must be formulated in the solid state. This has led to an increase in the use of lyophilized dosage forms. Lyophilization is a complicated processing method consisting of three major steps: freezing, primary drying, and secondary drying. This can lead to several formulation stability challenges including changes in ionization within the matrix, phase separation of the protein drug from added stabilizers, sufficient mobility within the system for movement of reactive species and protein side chains, and crystallization of excipients upon storage. Solid

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Isikdemir, Ozlem. "Investigation Of 8-year-long Composition Record In The Eastern Mediterranean Precipitation." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607064/index.pdf.

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Measurement of chemical composition of precipitation is important both to understand acidification of terrestrial and aquatic ecosystems and neutralization process in the atmosphere. Such data are scarce in the Mediterranean region. In this study, chemical composition of daily, wet-only, 387 number of rain water samples collected between 1991 and 1999 were investigated to determine levels, temporal variation and long-term trends in concentrations of major ions and trace elements between 1991 and 1999. Samples had already been collected and some of the analysis had been completed. The anions

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Elbagerma, Mohamed A. "Analytical method development for structural studies of pharmaceutical and related materials in solution and solid state : an investigation of the solid forms and mechanisms of formation of cocrystal systems using vibrational spectroscopic and X-ray diffraction techniques." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/4467.

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Analysis of the molecular speciation of organic compounds in solution is essential for the understanding of ionic complexation. The Raman spectroscopic technique was chosen for this purpose because it allows the identification of compounds in different states and it can give information about the molecular geometry from the analysis of the vibrational spectra. In this research the ionisation steps of relevant pharmaceutical material have been studied by means of potentiometry coupled with Raman spectroscopy; the protonation and deprotonation behaviour of the molecules were studied in different

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Halvachizadeh, Jaleh. "The Investigation of Reactions of Atomic Metal Anions with Small Hydrocarbons and Alcohols in the Gas Phase." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30646.

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Hydrocarbons are an abundant resource of carbon and hydrogen. For example, fossil can be used to produce useful organic compounds. However hydrocarbons seem to be inert. Thus, the activation of the C-H bond is a popular research area. Metals play the main role in most catalysts that convert hydrocarbons to starting materials in industry. The study of metals is important because the properties of the metal core greatly influences the reactivity of a catalyst.1 The study of the chemistry of metals in the gas phase provides valuable information about the properties of metals. This information ca

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Книги з теми "Acidity investigation"

Authority, Welsh Water, ed. Llyn Brianne acid waters project: An investigation into the effects of afforestation and land management on stream acidity : first technical report, April 1987 : participant organisations: Welsh Water Authority (WWA) ...[et al.]. [Welsh Water Authority], 1987.

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Biomanagement, CASE, and Ontario. Air Resources Branch. Phytotoxicology Section., eds. An Investigation of the use of lichens and mosses as biomonitors of acidic precipitation in Ontario: Report. Ontario Environment, 1990.

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Daveikis, Victor F. A preliminary investigation of differences in ovarian egg numbers and egg diameters between populations of cambarus robustus from acidic metal contaminated and neutral uncontaminated sites. Laurentian University, Department of Biology, 1993.

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Domvile, Serena J. Weathering behaviour of mine tailings and waste rock--A surface investigation. IN International land reclamation and mine drainage conference and International conference on the abatement of acidic drainage, 3rd, Proceedings. s.n, 1994.

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Fong, Tina Pui Wah. Investigation of some acidic ruthenium dihydrogen and hydride complexes. Dept of Chemistry, U of Toronto, 1999.

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Acidic Structural Groups in Illinois Coals; Variation During Oxidation and Carbonization; Report of Investigations No. 212. Creative Media Partners, LLC, 2021.

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Частини книг з теми "Acidity investigation"

Vimont, Alexandre, Marco Daturi, and John M. Winfield. "Investigation of Surface Acidity using a Range of Probe Molecules." In Functionalized Inorganic Fluorides. John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470660768.ch4.

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Aherne, J., M. Posch, P. J. Dillon, and A. Henriksen. "Critical Loads of Acidity for Surface Waters in South-Central Ontario, Canada: Regional Application of the First-Order Acidity Balance (FAB) Model." In Biogeochemical Investigations of Terrestrial, Freshwater, and Wetland Ecosystems across the Globe. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-0952-2_2.

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Charles, Donald F., Donald R. Whitehead, Dennis S. Anderson, et al. "The PIRLA Project (Paleoecological Investigation of Recent Lake Acidification): Preliminary Results for the Adirondacks, New England, N. Great Lakes States, and N. Florida." In Acidic Precipitation. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_36.

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Larssen, Thorjørn, B. Jack Cosby, and Tore Høgåsen. "Uncertainties in Predictions of Surface Water Acidity Using the Magic Model." In Biogeochemical Investigations of Terrestrial, Freshwater, and Wetland Ecosystems across the Globe. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-0952-2_10.

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Curtis, C. J., T. E. H. Allott, B. Reynolds, and R. Harriman. "The Prediction of Nitrate Leaching with the First-Order Acidity Balance (FAB) Model for Upland Catchment in Great Britain." In Biogeochemical Investigations at Watershed, Landscape, and Regional Scales. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-0906-4_20.

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Kolmachikhina, E., and S. Naboychenko. "Investigation of Lignosulfonate Adsorption on Zinc Materials in Acidic Media." In Progress in Materials Science and Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75340-9_11.

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Georgii, H. W., C. Perseke, and E. Rohbock. "Investigation of the Wet and Dry Deposition of Acidic and Heavy-Metal Components." In Chemistry of Multiphase Atmospheric Systems. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70627-1_9.

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Hu, Xinping, and Hang Yin. "Physical and Biogeochemical Conditions and Trends in Texas Estuaries." In Estuaries of the World. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-70882-4_8.

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AbstractTo explore long-term changes in Texas estuaries, both physical (temperature and salinity) and biogeochemical parameters (dissolved oxygen, total organic carbon, total titration alkalinity, and pH) were examined for their long-term trends. Warming is found in all estuaries, consistent with observed warming in the Gulf of Mexico, and long-term salinity increase is also found in most of the examined stations, indicating a reduction in freshwater inflow, except in the northernmost estuary (i.e., Sabine Lake) and few secondary bays to the south, and the latter are subject to inflow manageme

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Weber, J., L. Campana, A. Selloni, A. Pasquarello, I. Papai, and A. Goursot. "Investigation of the Structural and Acidic Properties of Bulk Offretite Using First Principles Molecular Dynamics." In Thermodynamic Modeling and Materials Data Engineering. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-72207-3_13.

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Alonso, M. C., K. Villar, D. Qvaeschning, S. Irico, and G. Pérez. "Investigation on the Combined Interaction of Sulphate and Acidic Attack on Concretes Exposed to Aggressive Environments." In RILEM Bookseries. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20331-3_3.

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Тези доповідей конференцій з теми "Acidity investigation"

Goodman, Lindsey, and Preet M. Singh. "Investigation of Passivation Characteristics of X65 Pipeline Steel in Ethanol Fuel Environments." In CORROSION 2011. NACE International, 2011. https://doi.org/10.5006/c2011-11395.

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Abstract Growing interest in the use of alternative fuels has led to an increase in production of fuel grade ethanol (FGE), necessitating an efficient method of transportation for this biofuel. Occurrences of stress corrosion cracking (SCC) of pipeline steels in FGE have spurred studies toward understanding the phenomenon of this environmentally assisted cracking and corrosion. Prior work in simulated fuel grade ethanol (SFGE) has shown that water, chloride ions, dissolved oxygen, and acidity are all major factors in the promotion of SCC of pipeline steel. In this study, passive film character

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Pessu, Frederick, Richard Barker, and Anne Neville. "The Influence of pH on Localized Corrosion Behavior of X65 (UNS K03014) Carbon Steel in CO2-Saturated Brines." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05584.

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Abstract Pitting and localized corrosion of carbon steel is considered to be a complex process influenced by a wide range of parameters such as temperature, bulk solution pH and chloride ion concentration to name a few. Solution pH is known to influence corrosion film characteristics and morphology in CO2 and H2S-containing systems. However, from the perspective of pit initiation and propagation in CO2-saturated environments, the extent to which in-situ pH of solutions and the presence of corrosion products influence localized attack is still not clearly understood. This paper presents an inve

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Groysman, Alec, Naphtali Brodsky, Joseph Penner, Alon Goldis, and Natali Savchenko. "Study of Corrosiveness of Acidic Crude Oil and It's Fractions." In CORROSION 2005. NACE International, 2005. https://doi.org/10.5006/c2005-05568.

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Abstract Every time new acidic crude oils are used, the problem of naphthenic acids (NA) arises again. Most investigations concern the corrosiveness of crude oils or gas oil fractions containing NA. In the acidic crude oil “A”, the kerosene fraction was the most corrosive. The main goal of this work is to investigate the corrosiveness of different petroleum fractions distilled from acidic crude oil “A” at 150 to 370°C (302 to 698°F) and to find effective measures for diminishing the corrosiveness of aggressive fractions. Corrosiveness of acidic crude oil “A” and petroleum distillates towards p

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Abdar, Payman Sharifi, Bruce Brown, and Srdjan Nesic. "Electrochemical Investigation and Modeling of Cathodic Reactions on Iron Sulfides in Acidic Solutions." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-19428.

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Abstract With an increasing number of sour oil and gas fields in the world, mitigation of production related failures due to H2S corrosion is a key challenge. In H2S environments, the corrosion product layer could include different types of iron sulfides with various electrical and physiochemical properties. One of the main characteristics of iron sulfides is their semiconductive nature which could enhance the galvanic coupling between steel and this type of corrosion product layer. On that account, galvanic coupling between steel and iron sulfides is considered as the main culprit related to

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Larsen, Jan, and Lisbeth Rischel Hilbert. "Investigation into under Deposit Corrosion in Halfdan Production Tubulars." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-3746.

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Abstract Multifinger caliper runs in selected Halfdan producing wells have shown penetrations located in the top completions. Future mitigation requires identifying the factors controlling the corrosion process. The current mechanistic understanding is based on samples from retrieved tubing with slightly oxidized corrosion products. From these samples an attempt has been made to track back what chemistry prevailed when the tubing was in operation. The corrosion issues observed downhole in the producing wells may in some cases relate to partial coverage of iron sulfide film, but the typical imp

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Olszewski, Albert M., Robert R. Odle, and Richard A. Corbett. "Failure Investigation of Electronic Components in Backup Generators." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08196.

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Abstract The boon of the Internet and the 24/7 world has created a need for a reliable supply of electricity. Intermittent electricity can cause a severe consequence for a number of companies, especially those who manage and host information on the Internet. This paper investigates the catastrophic failures of uninterruptible power supply (UPS) units (i.e. backup generators) that were used by such companies. In the two cases presented, the failure mechanism was determined by site assessments supported by traditional laboratory techniques. The failure investigations concluded that air contamina

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Ohnaka, N., and Y. Furutani. "Electrochemical Investigation of Hydrogen Absorption Mechanism in Type 304 Stainless Steel under Simulated Crevice-Like Water Chemistry Conditions." In CORROSION 1987. NACE International, 1987. https://doi.org/10.5006/c1987-87261.

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Abstract An investigation of the permeation rate of electrolytic hydrogen through a Type 304 stainless steel membrane using an electrochemical technique is described. The variation of the permeation rate with cathodic overpotential has been determined under simulated crevice- like water chemistry condition, or in acidic (0.005 M H2SO4 + 0.05 M Na2SO4), neutral (0.05 M Na2SO4) and alkaline (0.01 N NaOH + 0.05 M Na2SO4) solutions with deaeration. The electrochemical relationships between electrochemical parameters like cathodic overpotential, cathodic current and permeation current, indicate tha

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de Romero, Matilde F., Sandra Urdaneta, Malbayucel Barrientos, and Gustavo Romero. "Correlation between Desulfovibrio Sessile Growth and OCP, Hydrogen Permeation, Corrosion Products and Morphological Attack on Iron." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04576.

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Abstract It has been shown that the main protagonists of Microbiologically Induced Corrosion (MIC) in waters injected for the secondary recovery of crude oil and in general for any MIC process, are Sulfate-Reducing Bacteria (SRB), found in their sessile stage adhering to the metal surfaces. This study consisted of evaluating sessile bacterial growth behavior of a pure strain of SRB identified as Desulfovibrio desulfuricans subspecies desulfuricans, on a pure iron sheet during different exposure periods: 3, 6, 9, 15, 18, 21 and 24 hours; and its correlation with open-circuit potential, hydrogen

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Keserović, Amela, Ralph Bäßler, and Yustin Kamah. "Suitability of Alloyed Steels in Highly Acidic Geothermal Environments." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-4031.

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Abstract This study aims to evaluate which of the materials currently available on the market could overcome the problem of corrosion and withstand highly aggressive conditions in the exploitation of geothermal resources in volcanic environments. Our investigations were triggered by the conditions on Lahendong geothermal field (North Sulawesi, Indonesia): well LHD-23 presents one of the greatest challenges due to its capacity of producing &gt; 20 MWe of energy from a single well and in the same time having very low pH (2 - 3) and relatively high chloride (1,500 mg/L) and sulphate (1,600 mg

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Wagner, Patricia A., and Brenda J. Little. "Applications of a Technique for the Investigation of Microbially Induced Corrosion." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86121.

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Abstract Traditional corrosion-measuring techniques applied to the study of microbially induced corrosion cannot distinguish between biotic and abiotic contributions. This paper describes a technique that permits this distinction. A cell composed of two galvanically coupled compartments, electrolytically connected but biologically separated, has been used to evaluate the electrochemical impact of naturally occurring estuarine microorganisms on four metal substrata. The colonizing species and the electrochemical impact of colonization varied among the metals evaluated. Preferential selection of

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Звіти організацій з теми "Acidity investigation"

Ruangpornvisuti, Vithaya. Acidity and basicity investigation for novel derivative of salen and stabilities of their complexes with metal cations : research report. Chulalongkorn University, 2002. https://doi.org/10.58837/chula.res.2002.32.

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Salen derivative, 4 was synthesized and studied for determination of its protonation constants by potentiometric titration. The protonation constants at 25 degree Celsius in 0.1 and 0.5 M KNO[subscript 3] are log K[subscript 1]=10.06, log K[subscript 2]=7.96, log K[subscript 3] = 7.12, log K[subscript 4]= 3.28 and log K[subscript 1]=10.48, log K[subscript 2]=7.99, log K[subscript 3] = 4.71, log K[subscript 4] =2.77, respectively. Complexation for the 4 complexes with Ni(II), Cu(II) and Zn(II) in 0.01 M Bu[subscript 4]NCF[subscript 3]SO[subscript 3] in MeOH were determined by UV-VIS spectrometr

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Ehrentraut, Dirk. Investigation on the Solubility of GaN in Supercritical Ammonia Containing Acidic, Neutral, and Some Basic Mineralizers. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada494785.

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Rempel, K. U., A. E. Williams-Jones, and K. Fuller. An experimental investigation of the solubility and speciation of uranium in hydrothermal ore fluids. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328995.

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Experimental data on the solubility and speciation of uranium in hydrothermal solution is required to improve genetic models for the formation of ore deposits, yet very few data of this type have been published. Of particular interest is the oxidation state of the uranium in solution, as conventional wisdom suggests that U is dissolved in the oxidized U(VI) state and precipitated as reduced U(IV) minerals, yet recent experiments have shown ppm-level solubility for U(IV). This study investigated the mobility of reduced U(IV) and oxidized U(VI) in acidic (pH = 2), fluoride- bearing and alkaline

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Lahav, Ori, Albert Heber, and David Broday. Elimination of emissions of ammonia and hydrogen sulfide from confined animal and feeding operations (CAFO) using an adsorption/liquid-redox process with biological regeneration. United States Department of Agriculture, 2008. http://dx.doi.org/10.32747/2008.7695589.bard.

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The project was originally aimed at investigating and developing new efficient methods for cost effective removal of ammonia (NH₃) and hydrogen sulfide (H₂S) from Concentrated Animal Feeding Operations (CAFO), in particular broiler and laying houses (NH₃) and hog houses (H₂S). In both cases, the principal idea was to design and operate a dedicated air collection system that would be used for the treatment of the gases, and that would work independently from the general ventilation system. The advantages envisaged: (1) if collected at a point close to the source of generation, pollutants would

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