Bibliografie tematiche / Sulfide (material)

Letteratura scientifica selezionata sul tema "Sulfide (material)"

Autore: Grafiati
Pubblicato: 27 luglio 2024
Ultima modifica: 29 luglio 2024

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Articoli di riviste sul tema "Sulfide (material)"

1

Daurenbek, M., e A. Bakibaev. "Study of the microstructure of the complex sulphide compound ZnIn". BULLETIN of the L.N. Gumilyov Eurasian National University. Chemistry. Geography. Ecology Series 132, n. 3 (2020): 61–72. http://dx.doi.org/10.32523/2616-6771-2020-132-3-61-72.

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Abstract (sommario):
Currently, the production of new inorganic materials based on the sulfides synthesis is a major and promising direction. This is due to the obvious society needs for highly sensitive, fast-acting as well as economically attractive materials for various science branches and technologies. Such materials include ZnIn sulfide which has already found various practical applications.This work describes the methods for synthesis of sulfide material. The synthesis of the indicated sulfide was carried out by the developed methods.The obtained material was analyzed on an energy dispersive spectrometer М.Ә. Дәуренбек, А.А. Бакибаев 72Quantax 70, which allows for X-ray mapping, line elemental analysis and multielement point analysis. The specific features of the material microstructure and a surface nature of its structural elements are revealed.The obtained results make possible to predict many physicochemical properties of complex sulfides compounds and to judge their changes under various influences. Knowledge about microstructure features of such material as well as understanding of complex processes that affect its properties is an indispensable condition for new materials creation based on complex sulfides
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2

Temmel, C., B. Karlsson e N. G. Ingesten. "Quenching cracks in medium carbon steel initiated at manganese sulfide inclusions". HTM Journal of Heat Treatment and Materials 62, n. 5 (1 ottobre 2007): 236–42. http://dx.doi.org/10.1515/htm-2007-0009.

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Abstract (sommario):
Abstract Quench crack propensity has been investigated for two identical medium carbon steels (50CrMo4) which only differed in sulfur content. The standard variant of the material was affected by manganese sulfide inclusions whereas the low sulfur material was essentially free of sulfides. 80 mm, cylindrical test specimens were used. The test specimens had been cut out of cross rolled steel plates in which the manganese sulfide were flattened to discoid shape. The specimen orientation was in direction of principal deformation where the flattened sulfides were aligned with the test specimen axis. The largest sulfides reached lengths of 150 μm. Both materials were austenitized at 850 °C for 60 minutes, quenched in a salt-bath at 180 °C and immediately annealed at 425 °C for one hour. It turned out that the standard material developed quench cracks which initiated at manganese sulfide. No cracks could be found in the low sulfur material. Thermal and transformational stresses, which develop during quenching, aggravate the stress situation around the manganese sulfide and cause the cracking. The results are interpreted in fracture mechanical terms.
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3

Poch, R. M., B. P. Thomas, R. W. Fitzpatrick e R. H. Merry. "Micromorphological evidence for mineral weathering pathways in a coastal acid sulfate soil sequence with Mediterranean-type climate, South Australia". Soil Research 47, n. 4 (2009): 403. http://dx.doi.org/10.1071/sr07015.

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Abstract (sommario):
Soil micromorphology, using light microscopy and scanning electron microscopy (SEM), was used to describe detailed soil morphological and compositional changes and determine mineral weathering pathways in acid sulfate soils (ASS) from the following 2 contrasting coastal environments in Barker Inlet, South Australia: (i) a tidal mangrove forest with sulfidic material at St Kilda, and (ii) a former supratidal samphire area at Gillman that was drained in 1954 causing sulfuric material to form from sulfidic material. Pyrite framboids and cubes were identified in sulfidic material from both sites and are associated with sapric and hemic materials. Gypsum crystals, interpreted as a product of sulfide oxidation, were observed to have formed in lenticular voids within organic matter in the tidal mangrove soils at St Kilda. Sulfide oxidation was extensive in the drained soil at Gillman, evidenced by the formation of iron oxyhydroxide pseudomorphs (goethite crystallites and framboids) after pyrite and jarosite, and of gypsum crystals. Gypsum crystals occur where a local source of calcium such as shells or calcareous sand is present. Sporadic oxidation episodes are indicated by the formation of iron oxide and jarosite coatings around coarse biogenic voids. These observations indicate that mineral transformation pathways are strongly influenced by soil physico-chemical characteristics (i.e. oxidation rate, Eh, pH, soil solution chemistry, mineralogy, and spatial distribution of sulfides). This information has been used to illustrate the interrelationships of pyrite, carbonate, gypsum, jarosite, and organic matter and help predict soil evolution under changing hydro-geochemical, redoximorphic, and thermal conditions in soils from coastal environments.
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4

Harrison, Susan T. L., Alexander H. Hesketh, Robert P. van Hille e Jennifer L. Broadhurst. "Process Decisions Focused on the Prevention of AMD Formation on Beneficiating Sulfide Minerals". Advanced Materials Research 71-73 (maggio 2009): 685–88. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.685.

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Abstract (sommario):
Acid Mine Drainage (AMD) from voluminous sulfide-bearing wastes contributes to the environmental burden of mineral processing. To diminish burden and its time frame of risk, the disposal of sulfidic waste materials is re-examined through the valuable distinction between reactive or active gangue materials contributing to AMD generation and largely unreactive passive gangue. In an example process for disposal of tails from mineral sulfide beneficiation, a proof of concept is provided for inclusion of a non-selective sulfide float preceding or following selective separation of the desired mineral sulfide. The environmental benefit of subsequent reduction of sulfide in the tailings from 3.7 to 0.2% on AMD generation potential is quantified through a combination of methodologies including MPA, ANC, NAPP, NAG and microbial testing. Sulfide reduction from 4 to 1% reduces AMD generation. Further reduction below 1% S yields diminishing returns. The environmental benefit of separating ‘active’ and ‘passive’ gangue material prior to disposal is shown, and the reduced active gangue fraction determined through material balance.
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5

Martins, Natalia Pires, Sumit Srivastava, Francisco Veiga Simão, He Niu, Priyadharshini Perumal, Ruben Snellings, Mirja Illikainen, Hilde Chambart e Guillaume Habert. "Exploring the Potential for Utilization of Medium and Highly Sulfidic Mine Tailings in Construction Materials: A Review". Sustainability 13, n. 21 (3 novembre 2021): 12150. http://dx.doi.org/10.3390/su132112150.

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Abstract (sommario):
Medium and highly sulfidic tailings are high-volume wastes that can lead to severe environmental damage if not properly managed. Due to the high content of sulfide minerals, these tailings can undergo weathering if put in contact with oxygen and water, generating acid mine drainage (AMD). The moderate-to-high sulfide content is also an important technical limitation for their implementation in the production of construction materials. This paper reviews the use of sulfidic tailings as raw material in construction products, with a focus on cement, concrete, and ceramics. When used as aggregates in concrete, this can lead to concrete degradation by internal sulfate attack. In building ceramics, their implementation without prior treatment is undesirable due to the formation of black reduction core, efflorescence, SOx emissions, and their associated costs. Moreover, their intrinsic low reactivity represents a barrier for their use as supplementary cementitious materials (SCMs) and as precursors for alkali-activated materials (AAMs). Nevertheless, the production of calcium sulfoaluminate (CSA) cement can be a suitable path for the valorization of medium and highly sulfidic tailings. Otherwise difficult to upcycle, sulfidic tailings could be used in the clinker raw meal as an alternative raw material. Not only the SO3 and SiO2-rich bulk material is incorporated into reactive clinker phases, but also some minor constituents in the tailings may contribute to the production of such low-CO2 cements at lower temperatures. Nevertheless, this valorization route remains poorly explored and demands further research.
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6

Medennikov, O. A., e N. P. Shabelskaya. "Technology for processing phosphogypsum into a fluorescent dye based on calcium sulfide". Fine Chemical Technologies 17, n. 4 (30 settembre 2022): 357–68. http://dx.doi.org/10.32362/2410-6593-2022-17-4-357-368.

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Abstract (sommario):
Objectives. There is considerable economic demand for products obtained by processing phosphogypsum. In particular, calcium sulfide-based materials having luminescent properties are the object of intensive study due to the wide range of possibilities for their use. The alloying of the structure of calcium sulfide with cations of rare earth elements leads to the appearance of a glow having various colors. However, the high cost of such phosphorescent materials is due to the high chemical purity of the reagents required for their synthesis. The development of efficient methods for obtaining calcium sulfide-based luminescent materials from phosphogypsum is part of an integrated approach to solving the problem of synthesizing economically demanded materials from production waste.Methods. The synthesized materials were studied using X-ray phase analysis and scanning electron microscopy. Photos of the samples were taken under illumination with an incandescent lamp or a fluorescent ultraviolet lamp.Results. According to X-ray phase analysis, phosphogypsum is mainly comprised of calcium sulfate dihydrate and calcium sulfate hemihydrate. Heat treatment of a phosphogypsum sample at a temperature of 1073 K is accompanied by the formation of anhydrous calcium sulfate. In the presence of a reducing agent, a composite material is formed containing a phase of anhydrous calcium sulfate and calcium sulfide. Due to the calcium sulfide content, phosphogypsum has luminescent properties when heat-treated in the presence of various reducing agents, including activated carbon, wood charcoal, vegetable oil, citric acid, starch, and sucrose.Conclusions. Optimal technological conditions for obtaining a composite material exhibiting luminescent properties are revealed. The successful synthesis of phosphor from without nonpretreated phosphogypsum is demonstrated. Optimal technological conditions for obtaining a composite material exhibiting luminescent properties are as follows: heat treatment temperature is 1073–1173 K; isothermal holding time is 60 min; reducing agent quantity is 37–50% (mol). The study results are widely applicable to processing wastes obtained from large-scale chemical production involving the production of a highly demanded inorganic product.
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7

Ward, Nicholas J., Leigh A. Sullivan e Richard T. Bush. "The response of partially oxidised acid sulfate soil materials to anoxia". Soil Research 42, n. 6 (2004): 515. http://dx.doi.org/10.1071/sr03111.

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Abstract (sommario):
Four acid sulfate soil (ASS) materials were subjected to anoxia after varying periods of oxidation to determine the geochemical response of these types of soils to flooding. The response of the partially oxidised ASS materials to the exclusion of oxygen was variable. The rate of sulfide oxidation, acidification, and the production of soluble oxidation products such as sulfate, iron, and aluminium generally decreased markedly when subjected to anoxia. However, especially in the highly acidic ASS materials (i.e. pH <3.5), sulfide oxidation and acidification generally continued (albeit at much slower rates), most probably due to oxidation by Fe3+. Rapid sulfide re-formation occurred in the peat ASS material that had been oxidised for 63 days, with 0.47% reduced inorganic sulfur (SCR) formed over 60 days of anoxia. This substantial sulfide re-formation was accompanied by only a slight increase in pH. Minimal sulfide re-formation occurred in 2 of the ASS materials when placed in anoxic conditions, most likely due to a lack of readily available organic matter in these materials. The results show that the imposition of anoxic conditions on partially oxidised ASS materials is generally effective in decreasing the rates of further sulfide oxidation, acidification, and the production of soluble sulfide oxidation products. Biogeochemical sulfide formation consumes acidity; however, sulfide re-formation was ineffective in reversing acidification under the conditions of this experiment. The results indicate that the treatment of sites containing actual ASS materials by management strategies relying on oxygen exclusion need to be accompanied by other strategies that include acidty neutralisation or containment.
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8

Ward, Nicholas J., Leigh A. Sullivan e Richard T. Bush. "Sulfide oxidation and acidification of acid sulfate soil materials treated with CaCO3 and seawater-neutralised bauxite refinery residue". Soil Research 40, n. 6 (2002): 1057. http://dx.doi.org/10.1071/sr01119.

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Abstract (sommario):
Acid sulfate soil (ASS) materials that are subject to oxidation are often treated with neutralising agents to minimise the export of acidity that may result from pyrite oxidation. The effects of additions of both CaCO3 and seawater-neutralised bauxite refinery residue (SNBRR) on the oxidation of sulfides and acidification were assessed for 4 ASS materials using laboratory incubation experiments. As the application of sub-optimal rates of neutralising materials can occur for a variety of reasons, the effect of application rates were also examined. Two application rates were chosen; a sub-optimal rate [approximately 20% of the theoretical neutralising requirement (NR)] and an excessive application rate (&gt;250% of the NR). There was minimal sulfide oxidation and no acidification after the addition of excess CaCO3 over the 180 days of incubation. The addition of excess SNBRR prevented acidification, but substantial sulfide oxidation still occurred. Following a brief initial increase in pH when sub-optimal rates of CaCO3 and SNBRR were applied, the treated ASS materials rapidly acidified. For three of the ASS materials the addition of sub-optimal amounts of CaCO3 had little impact on the rate of sulfide oxidation. However, for the other ASS material (a peat) both the rates of sulfide oxidation and acidification were accelerated by the addition of sub-optimal rates of CaCO3, resulting in higher soluble Fe and Al concentrations than in the untreated ASS materials. For some of the ASS materials, sub-optimal applications of SNBRR resulted in elevated soluble Al.
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9

Ward, Nicholas J., Leigh A. Sullivan e Richard T. Bush. "Soil pH, oxygen availability, and the rate of sulfide oxidation in acid sulfate soil materials: implications for environmental hazard assessment". Soil Research 42, n. 6 (2004): 509. http://dx.doi.org/10.1071/sr03110.

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Abstract (sommario):
The potential environmental hazard of acid sulfate soil (ASS) materials is directly related to both the net acidity and the rate that actual acidity is released from these soil materials into the environment. While current environmental hazard assessment techniques for ASS materials are able to quantify the net acidity, they do not take account of differences in the rate of sulfide oxidation (the dominant source of actual acidity) and differences in the rate of acidification. In this study the rate of sulfide oxidation during incubation was examined for 4 ASS materials. The effect of pH and oxygen availability on the rate of sulfide oxidation was assessed. The ASS materials were incubated in: (i) gauze where oxygen diffusion was not restricted, and (ii) sealed 100-µm-thick plastic bags which greatly limited oxygen diffusion. When oxygen diffusion was not restricted, an accelerated oxidation of sulfide occurred when the pH decreased below pH 4.0. The accelerated rate of sulfide oxidation at such low pH did not occur when oxygen diffusion was limited. This study indicates that the initial pH of an ASS material is a useful additional indicator of the potential environmental hazard of an ASS material when oxygen is expected to be non-limiting, such as when ASS materials are excavated and stockpiled. The recommended action criteria need to be reassessed, as the data indicate that the current criteria are conservative for alkaline and neutral ASS materials, but should be lowered for all acidic ASS materials (i.e. pH <5.5) to 0.03% sulfide regardless of texture.
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10

Puhakka, J. A., J. A. Rintala e P. Vuoriranta. "Influence of Sulfur Compounds on Biogas Production from Forest Industry Wastewater". Water Science and Technology 17, n. 1 (1 gennaio 1985): 281–88. http://dx.doi.org/10.2166/wst.1985.0023.

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Abstract (sommario):
Various inorganic sulfur compounds and lignosulfonate were studied with respect to their effect on biogas production from synthetic wastewater simulating sulfite evaporator condensate. The sulfur balance during the anaerobic degradation was also investigated. In biogas production assay tests municipal digester sludge was used as seed material. Differences in sulfur inhibition of methanogenesis between various oxidation states of inorganic sulfur were detected. Sulfate and sulfide in concentrations 100 mg S/l had no effect whereas sulfite, thiosulfate and dithionite caused a lag-period in biogas production. Reduced biogas production was observed even with the addition of 1000 mg S/l as SO=4, SO=3 and S2O=3. Dithionite was the most toxic compound investigated. Sodiumlignosulfonate in concentrations 5-15 g/l has a supplementary increase in biogas production. Inorganic sulfur compounds were partially reduced to sulfide in anaerobic conditions.
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Più fonti

Tesi sul tema "Sulfide (material)"

1

Owens, Gregg Russell. "An experimental investigation of the material response of graphite/polyphenylene sulfide". Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101143.

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Abstract (sommario):
The material response of a graphite/polyphenylene sulfide (thermoplastic) composite system to a variety of loadings was experimentally investigated. Quasi-static tension tests were performed on specimens cut from unidirectional panels at angles of 0°, 90°, and 10° in order to the find material properties of the system. The moduli and strengths were compared to those of several other graphite/epoxy systems. The effect of molded-on end tabs on the strength and failure mode of 0° specimens was also assessed. Both quasi-static tension tests and cyclic tension-tension (R=0.1) fatigue tests were performed on (0/±45/90)s and (0/90₃)s specimens. A variety of NDT techniques were used to inspect the "as received" panels and to monitor the formation and growth of damage during quasi-static tension and cyclic fatigue testing. The "as received" panels were found to possess initial flaws that included warping of unidirectional panels, dense matrix cracking in all multi-directional laminates, and local matrix rich and matrix poor regions. The predominately observed damage mechanism occurring as a result of applied mechanical load was delamination. Comments on the ability of each NDT technique to locate and monitor damage occurring in each specimen type are also presented. A preliminary investigation of the creep response of ( ±45₂)s specimens was performed. Seventy-two hour creep tests were performed at temperatures of 75°, 160°, 250°, and 350° Fahrenheit and at stress levels of 750 psi and 1000 psi. It was found that when testing specimens repeatedly, a strange stiffening phenomenon was observed to occur during the first creep test performed at 350°. After the initial creep test at 350° was performed, no further stiffening of the specimen occurred and all tests performed thereafter were found to be repeatable. The mechanism causing this stiffening phenomenon has not yet been determined, but such an effect is of obvious importance for design considerations and therefore warrants further study.
M.S.
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2

Simpson, Zachary Ian. "Advanced Materials for Energy Conversion and Storage: Low-Temperature, Solid-State Conversion Reactions of Cuprous Sulfide and the Stabilization and Application of Titanium Disilicide as a Lithium-Ion Battery Anode Material". Thesis, Boston College, 2013. http://hdl.handle.net/2345/3042.

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Abstract (sommario):
Thesis advisor: Dunwei Wang
In this work, we present our findings regarding the low-temperature, solid-state conversion of Cu₂S nanowires to Cu₂S/Cu₅FeS₄ rod-in-tube structures, Cu₂S/ZnS segmented nanowires, and a full conversion of Cu₂S nanowires to ZnS nanowires. These conversion reactions occur at temperatures as low as 105 degrees Celsius, a much lower temperature than those required for reported solid-state reactions. The key feature of the Cu₂S nanowires that enables such low conversion temperatures is the high ionic diffusivity of the Cu⁺ within a stable S sublattice. The second portion of this work will focus on the oxide-stabilization and utilization of TiSi₂ nanonets as a lithium-ion battery anode. This nanostructure, first synthesized in our lab, was previously demonstrated to possess a lithium storage capacity when cycled against a metallic Li electrode. However, with subsequent lithiation and delithiation cycles, the TiSi₂ nanonet structure was found to be unstable. By allowing a thin oxide layer to form on the surface of the nanonet, we were able to improve the capacity retention of the nanonets in a lithium-ion half-cell; 89.8% of the capacity of the oxide-coated TiSi₂ was retained after 300 cycles compared to 62.3% of the capacity of as-synthesized TiSi₂ nanonets after 300 cycles. The layered structure of C49 TiSi₂ exhibited in the nanonets allows for a specific capacity greater than 700 mAh g(-1), and the high electrical conductivity of the material in conjunction with the layered structure confer the ability to cycle the anode at rates of up to 6C, i.e., 10 minute charge and discharge cycles, while still maintaining more than 75% of the capacity at 1C, i.e., 1 hour charge and discharge cycles
Thesis (MS) — Boston College, 2013
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Chemistry
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3

Russell, Blair Edward. "Material Characterization and Life Prediction of a Carbon Fiber/Thermoplastic Matrix Composite for Use in Non-Bonded Flexible Risers". Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/30797.

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Abstract (sommario):
In the effort to improve oil production riser performance, new materials are being studied. In the present case, a Polymer Matrix Composite (PMC) is being considered as a replacement for carbon steel in flexible risers manufactured by Wellstream Inc., Panama City, Florida. The Materials Response Group (MRG) at Virginia Tech had the primary responsibility to develop the models for long-term behavior, especially remaining strength and life. The MRG is also responsible for the characterization of the material system with a focus on the effects of time, temperature, and environmental exposure. The present work is part of this effort. The motivation to use a composite material in a non-bonded flexible riser for use in the offshore oil industry is put forth. The requirements for such a material are detailed. Strength analysis and modeling methods are presented with experimental data. The effect of matrix crystallinity on composite mechanical properties is shown. A new method for investigating matrix behavior at elevated temperatures developed. A remaining strength life prediction methodology is recalled and applied to the case of combined fatigue and rupture loading.
Master of Science
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4

Filho, Jorge Luis Rodrigues Pantoja. "Avaliação da utilização de diferentes materiais suporte na biofiltração de sulfeto de hidrogênio". Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-16062008-131937/.

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Abstract (sommario):
O sulfeto de hidrogênio é um gás que pode causar os mais diversos danos se lançado ao meio ambiente devido, principalmente, à sua elevada toxicidade, corrosividade, odores indesejáveis e alta demanda de oxigênio. Atualmente existem diferentes processos físico-químicos estabelecidos para o tratamento desse composto, entretanto são consideradas técnicas onerosas do ponto de vista econômico e ambiental. Os processos biológicos constituem-se como uma alternativa bastante interessante quando comparados aos processos físico-químicos, sendo que a biofiltração é o processo mais amplamente utilizado. Neste trabalho, foram avaliados três tipos diferentes de materiais suporte, sendo um sintético - espuma de poliuretano - e dois orgânicos - fibra de côco e bagaço de cana -, para a biofiltração de uma mistura gasosa contendo \'H IND.2\'S\'. Como inóculo, optou-se pela utilização de cultura mista originária de duas fontes: a) unidade de biofiltro aerado submerso pertencente ao Serviço Autônomo de Água e Esgoto da Cidade de São Carlos, b) unidade de lodos ativados pertencente a São Carlos S/A - Indústria de Papel e Celulose. A adaptação do inóculo foi realizada em meio nutriente específico. Foi observado um período de partida de somente 2 dias nos três sistemas. Com o intuito de avaliar o impacto do aumento progressivo das taxas de carregamento mássico no desempenho dos três biofiltros, os mesmos foram submetidos a taxas de 19, 32, 54 e 70 g/m³.h (concentrações afluentes médias de 184, 328, 526 e 644 ppm para tempo de retenção do gás de, aproximadamente, 50 segundos). As eficiências remoção média em todos os sistemas mantiveram-se sempre acima dos 99,3%. A capacidade eliminação máxima alcançada pelos biofiltros oscilou entre 74 e 80 g/m³.h. As perdas de carga verificadas no ensaio hidrodinâmico foram baixas, variando entre 0,59.\'10 POT.-2\' a 0,68 \'10 POT.-2\' mca, para a velocidade superficial utilizada durante o estudo. O modelo matemático empregado na previsão do desempenho dos sistemas ajustou-se bem aos dados experimentais. Portanto, pode-se concluir que os materiais suportes testados são adequados para a biofiltração de sulfeto de hidrogênio.
Hydrogen sulfide is a gas which has high restrictions regarding to its disposal in the environment, mainly, because of its high toxicity, malodors, high oxygen demand, etc. Currently, there are many different physical-chemical processes established in order to treat this compound, nevertheless they are considered expensive techniques by the point of economical and environmental views. Biological processes are very interesting alternatives when they are compared to the physical-chemical ones, and biofiltration is the most used process. In this work, three different materials as support media were evaluated, - a synthetic one - represented by the polyurethane foam, - two organic ones - represented by coconut fiber and sugar bagasse -, for a biofiltration of a gaseous mixture containing \'H IND.2\'S\'. Microorganisms were obtained from two sources: a) submerged aerated biofilter unit, b) activated sludge unit. Inoculum\'s adaptation was realized in specific nutrient media. It was observed a 2 days start-up period in the three systems. In order to evaluate some impact caused by the progressive increasing of mass loading rate on the biofilters performance, were applied rates of 19, 32, 54 e 70 g/m³.h (average influent concentrations of 184, 328, 526 e 644 ppm to the empty bed retention time of, approximately, 50 seconds). Average removal efficiencies in the systems were always above 99,3%. Maximum elimination capacities reached by the biofilters were in the range of 74 e 80 g/m³.h. Loss pressure verified by the hands of hydrodynamic essays varied between 0,59.\'10 POT.-2\' a 0,68.\'10 POT.-2\' mca, to a superficial velocity utilized during the work. Mathematical model used to predict the performance of the systems fitted reasonably the experimental data. Then, it can be concluded that the three packing materials are appropriated for the hydrogen sulfide biofiltration.
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5

Dilner, David. "Profitability = f(G) : Computational Thermodynamics, Materials Design and Process Optimization". Doctoral thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191243.

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The thesis starts by giving a motivation to materials modeling as a way to increase profitability but also a possibility decrease the environmental impact. Fundamental concepts of relevance for this work are introduced, this include the materials genome, ICME and of course the CALPHAD method. As a demonstration promising results obtained by an ICME approach using genetic algorithms and CALPHAD on the vacuum degassing process are presented. In order to make good predictive calculations and process models it is important to have good thermodynamic descriptions. Thus most part of the work has concerned the thermodynamic assessments of systems of importance for steelmaking, corrosion and similar processes. The main focus has been the assessment of sulfur-containing systems and thermodynamic descriptions of the Fe-Mn-Ca-Mg-S, Fe-Ca-O-S, Fe-Mg-O and Mg-Mn-O systems are presented. In addition, heat capacity measurements of relevance for the Mg-Mn-O system have been performed. To summarize the efforts some application examples concerning thermodynamic calculations related to steelmaking and inclusion formation are shown.

QC 20160829


COMPASS
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6

Jiang, Tong. "Porous tin(IV) sulfide materials". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0007/NQ41557.pdf.

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7

Rijal, Upendra. "Suppressed Carrier Scattering in Cadmium Sulfide-Encapsulated Lead Sulfide Nanocrystal Films". Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1402409476.

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8

Marin, Riccardo <1987&gt. "Copper sulfide and copper indium sulfide nanoparticles: two optically active materials with a bright future". Doctoral thesis, Università Ca' Foscari Venezia, 2017. http://hdl.handle.net/10579/11971.

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Abstract (sommario):
In questa tesi presento i risultati dello studio di nanoparticelle (NPs) di rame indio solfuro e rame solfuro aventi differenti proprietà ottiche. Questi due materiali sono attualmente sotto meticolosa investigazione, poiché recenti studi li hanno confermati essere delle valide alternative rispetto ai materiali utilizzati al momento in molti campi applicativi. Ciò deriva dalla loro affidabilità, intrinseca non tossicità e dal loro essere relativamente economici. Queste NP possono essere utilizzate per la produzione, tra gli altri, di agenti teranostici, dispositivi fotovoltaici, sensori e LED. Lo scopo della mia ricerca è stato di sintetizzare tali NP con metodi semplici ed innovativi, al fine di impartire a tali NP specifiche caratteristiche, quali la possibilità di essere dispersi in solventi polari o proprietà ottiche migliori. In una seconda fase, ho studiato l’interazione di queste NP con NP a base di terre rare (RE) al fine di ottenere sistemi complessi con proprietà superiori.
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9

Beauvais, Jacques. "Gain optique dans le cadmium indium sulfide". Thesis, University of Ottawa (Canada), 1987. http://hdl.handle.net/10393/5316.

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Mbah, Jonathan Chinwendu. "Endurance materials for hydrogen sulfide splitting in electrolytic cell". [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002693.

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Libri sul tema "Sulfide (material)"

1

Sims, Jerre G. Risk of pore water hydrogen sulfide toxicity in dredged material bioassays. [Vicksburg, Miss: U.S. Army Engineer Waterways Experiment Station, 1995.

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Luong, H. V. Microbial leaching of arsenic from low-sulfide gold mine material. S.l: s.n, 1985.

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Fumiyuki, Marumo, a cura di. Dynamic processes of material transport and transformation in the earth's interior. Tokyo: Terra Scientific Pub. Co., 1991.

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Engineers, National Association of Corrosion. Sulfide stress cracking resistant metallic materials for oilfield equipment. Houston: NACE, 2001.

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National Association of Corrosion Engineers. Sulfide stress cracking resistant metallic materials for oilfield equipment. Houston: NACE, 1995.

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National Association of Corrosion Engineers. Sulfide stress cracking resistant metallic materials for oilfield equipment. Houston: NACE, 1997.

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National Association of Corrosion Engineers. Sulfide stress cracking resistant metallic materials for oilfield equipment. Houston: NACE, 1999.

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Byerly, Don W. Guidelines for handling excavated acid-producing materials. [Washington, D.C.]: U.S. Dept. of Transportation, Federal Highway Administration, 1990.

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National Association of Corrosion Engineers., a cura di. Standardmaterials requirements: Sulfide stress crackingresistant metallic materials for oilfield equipment. Houston: NACE, 2002.

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Wang, Haidou. Micro and Nano Sulfide Solid Lubrication. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Capitoli di libri sul tema "Sulfide (material)"

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Wu, Hong, Xu Lu, Xiaodong Han e Xiaoyuan Zhou. "Tin Sulfide: A New Nontoxic Earth-Abundant Thermoelectric Material". In Novel Thermoelectric Materials and Device Design Concepts, 47–61. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-12057-3_3.

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Rogozhnikov, D., S. Mamyachenkov e O. Anisimova. "Thermodynamic Features Research of Polymetallic Sulfide Raw Material Leaching". In Progress in Materials Science and Engineering, 73–79. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75340-9_10.

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Diedel, R., e W. Püttmann. "Base Metal Mineralization and Maturation of Organic Material in the Kupferschiefer of the Lower Rhine Basin". In Base Metal Sulfide Deposits in Sedimentary and Volcanic Environments, 60–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-662-02538-3_4.

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Menaka, V., D. Geetha e P. S. Ramesh. "PLA Stabilized/Graphene-Based Copper Sulfide-Hole Transport Material for Organic Photovoltaics". In Bio-Based Polymers and Composites, 275–85. New York: Apple Academic Press, 2024. http://dx.doi.org/10.1201/9781032669243-15.

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Sugaki, Asahiko, Kenichiro Hayashi e Arashi Kitakaze. "Sulfide Complexes Dissolved in Hydrothermal Solutions—Solubility Studies on Ag2S and ZnS". In Dynamic Processes of Material Transport and Transformation in the Earth’s Interior, 97–112. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-3314-2_7.

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Kalita, Debabrat, Lakhi Chetia e Gazi A. Ahmed. "Harvesting Insolation Using Mo–W–Sulfide Compound Nanoparticle Semiconductor as Photocatalyst: A Pollution Controlling Material". In Lecture Notes in Electrical Engineering, 505–14. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4286-7_50.

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Wang, Haidou, Binshi Xu e Jiajun Liu. "Solid Lubrication Materials". In Micro and Nano Sulfide Solid Lubrication, 1–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-23102-5_1.

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Doménech-Carbó, Antonio. "Sulfides, Nitrides, Phosphides". In Electrochemistry of Porous Materials, 149–63. 2a ed. Names: Domeénech-Carboó, Antonio, author. Title: Electrochemistry of porous materials / Antonio Domeénech Carboó. Description: Second edition. | Boca Raton : CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/9780429351624-9.

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Almeida, Rui M., e Jian Xu. "Sol–Gel Processing of Sulfide Materials". In Handbook of Sol-Gel Science and Technology, 1–26. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-19454-7_11-1.

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Almeida, Rui M., e Jian Xu. "Sol‐Gel Processing of Sulfide Materials". In Handbook of Sol-Gel Science and Technology, 403–28. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-32101-1_11.

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Atti di convegni sul tema "Sulfide (material)"

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Gentilman, Richard L., Melissa B. Dekosky, Thomas Y. Wong, Randal W. Tustison e Marian E. Hills. "Calcium Lanthanum Sulfide As A Long Wavelength IR Material". In 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, a cura di Solomon Musikant. SPIE, 1988. http://dx.doi.org/10.1117/12.945852.

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Gaiardo, A., P. Bellutti, S. Gherardi, G. Zonta, B. Fabbri, A. Giberti, V. Guidi e C. Malagu. "Tin (IV) Sulfide chemoresistivity: A possible new gas sensing material". In 2015 XVIII AISEM Annual Conference. IEEE, 2015. http://dx.doi.org/10.1109/aisem.2015.7066860.

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Dizer, Oleg, Denis Rogozhnikov e Aleksei Babintsev. "Nitric acid leaching modeling of copper-arsenic sulfide raw material". In PROCEEDINGS OF THE 16TH INTERNATIONAL CONFERENCE ON INDUSTRIAL MANUFACTURING AND METALLURGY (ICIMM 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0074908.

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Rahate, A. S., K. R. Nemade e S. A. Waghuley. "Optical investigation of polyphenylene sulfide composite". In PROCEEDING OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN APPLIED PHYSICS AND MATERIAL SCIENCE: RAM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4810474.

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Ganesh, R., V. Manikandan, N. Nalini e S. Prabu. "Investigation on effects of polyethylene glycols on cadmium sulfide thin films". In PROCEEDINGS OF ADVANCED MATERIAL, ENGINEERING & TECHNOLOGY. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0019498.

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Jones, Christopher, Jimmy Price, Mickey Pelletier, William Soltmann, Darren Gascooke e Anthony van Zuilekom. "NEW ADVANCED MATERIAL AND COATING TECHNIQUE FOR TRACE HYDROGEN SULFIDE SAMPLING". In 2019 SPWLA 60th Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2019. http://dx.doi.org/10.30632/t60als-2019_tt.

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Mishra, Pushkar, Deobrat Singh, Yogesh Sonvane e Rajeev Ahuja. "2D monolayer boron sulfide as an efficient material for optical nanodevices". In 3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0001875.

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Teng, Chenzi, Ning Mao, Jingxian Liu e Xinjiao Tian. "Kinetic Study on Pyrolysis of Polyphenylene Sulfide under Different Oxygen Concentrations". In International Conference on Chemical,Material and Food Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/cmfe-15.2015.62.

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Shaw, L. Brandon, Michael Hunt, Woohong Kim, Shyam Bayya, Christopher Brown, Steve Bowman e Jasbinder S. Sanghera. "Pr3+ Doped Ceramic Calcium Lanthanum Sulfide for Mid-IR Laser Gain Material". In CLEO: Applications and Technology. Washington, D.C.: OSA, 2017. http://dx.doi.org/10.1364/cleo_at.2017.jtu5a.114.

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Mihsen, Hayder Hamied, Thana Jaafar Al-Hasani e Kasim Mohammed Hello. "Preparation of nanoporous material containing sulfide-carboxyl group derived from rice plant". In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0027496.

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Rapporti di organizzazioni sul tema "Sulfide (material)"

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VICUS TECHNOLOGIES LLC KENNEBUNK ME. Development of Zinc Sulfide Seeker Window Material. Fort Belvoir, VA: Defense Technical Information Center, gennaio 2005. http://dx.doi.org/10.21236/ada432111.

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Gui, Feng, e Ramgopal Thodla. PR-186-163608-R01 Resistance of TMCP Line Pipe Material to Sulfide SCC in Sour Service. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), maggio 2019. http://dx.doi.org/10.55274/r0011587.

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Abstract (sommario):
This report summarizes the effort to evaluate the sour fracture toughness properties of two thermo-mechanically controlled processed (TMCP) pipes and a plate material in sour environments with different H2S partial pressures. The primary objective of the project was to measure the fracture toughness properties of two TMCP pipes and a plate material in sour environments at three levels of H2S partial pressures ranging from 0.1 psia to 200 psia. The project also evaluated the Sulfide Stress Cracking (SSC) and Hydrogen Induced Cracking (HIC) susceptibilities (for selected conditions) of materials. Constant load and constant displacement tests were performed for two of the three H2S levels to determine the initiation toughness as compared to that determined in the slow rising displacement fracture toughness (FT) tests.
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Kingston, A. W., O. H. Ardakani, G. Scheffer, M. Nightingale, C. Hubert e B. Meyer. The subsurface sulfur system following hydraulic stimulation of unconventional hydrocarbon reservoirs: assessing anthropogenic influences on microbial sulfate reduction in the deep subsurface, Alberta. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330712.

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Hydraulic fracturing is a reservoir stimulation technique that involves the injection of high-pressure fluids to enhance recovery from unconventional hydrocarbon reservoirs. Often this involves the injection of surface waters (along with additives such as biocides) into formational fluids significantly different isotopic and geochemical compositions facilitating geochemical fingerprinting of these fluid sources. In some instances, the produced fluids experience an increase in hydrogen sulfide (H2S) concentration over the course of production resulting in an increased risk to health and safety, the environment, and infrastructure due to the toxic and corrosive nature of H2S. However, questions remain as to the origin and processes leading to H2S formation following hydraulic fracturing. In this study, we analyzed a series of produced waters following hydraulic fracturing of a horizontal well completed in the Montney Formation, Western Canada to evaluate variations in geochemical and microbiological composition over time and characterize potential sulfur species involved in the production of H2S. Initially, sulfur isotope ratios (d34S, VCDT) of dissolved sulfate in produced water had a baseline value of 27per mil similar to the d34S value of 25per mil for solid anhydrite derived from core material. Subsequently, d34S values of sulfate in produced fluids sequentially increased to 35per mil coincident with the appearance of sulfides in produced waters with a d34SH2S value of 18per mil. Oxygen isotope values of dissolved sulfate exhibited a synchronous increase from 13.2per mil to 15.8per mil VSMOW suggesting sulfate reduction commenced in the subsurface following hydraulic fracturing. Formation temperatures are &amp;lt;100°C precluding thermochemical sulfate reduction as a potential mechanism for H2S production. We suggest that microbial reduction of anhydrite-derived sulfate within the formation is likely responsible for the increase in H2S within produced waters despite the use of biocides within the hydraulic fracturing fluids. Initial assessments of microbial communities indicate a shift in community diversity over time and interactions between in situ communities and those introduced during the hydraulic fracturing process. This study indicates that biocides may not be fully effective in inhibiting microbial sulfate reduction and highlights the role anthropogenic influences such as hydraulic fracturing can have on the generation of H2S in the subsurface.
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Baldwin, Richard. PR-015-084508-R01 Contaminants in Sales Gas Pipelines Sources Removal and Treatment. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), settembre 2010. http://dx.doi.org/10.55274/r0010029.

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The objective of this project is to provide information about a problem material found in gas pipelines called "black powder". It is a mixture or a chemical compound of iron sulfides, iron oxides, dirt, sand, salts, chlorides, water, glycols, hydrocarbons and compressor oils, mill scale, or other materials. The most common constituents, iron compounds of sulfur or oxygen, are corrosion products. In addition to chemical formation, black powder can be formed by microbes normally found in gas pipelines. This material causes machinery, measurement, and pipeline maintenance problems. This research investigates the forms of iron sulfides, their characteristics, and methods of formation and whether the molecular form can be an indicator of the source of the material. A sampling protocol was developed for proper collection of materials for analysis. Seventeen corrosion samples were collected and analyzed for material constituents and microbial content. The results of this testing were anonymously tabulated in a database. Other tasks in this project include guidelines for removal, handling, and disposal of the material. It discusses symptomatic versus root cause treatments for the prevention and control of black powder, and the corporate culture necessary to manage the problem. It presents recently developed technologies for cleaning or treating a pipeline containing black powder, such as cleaning and anti-microbial agents containing THPS which dissolve iron sulfides, and the use of magnetic filtration. The final task describes concepts for identifying the location of black powder in an operating pipeline and places to look and methods to use to best determine the distribution of the material.
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Baldwin, Richard M. TA-97-4 Black Powder in the Gas Industry - Sources Characteristics and Treatment. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), maggio 1998. http://dx.doi.org/10.55274/r0011722.

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The original objective of this research was to investigate means of controlling materials ingested into compressors in pipeline, refinery, gathering, and storage services. After an initial industry survey, it was determined that "Black Powder" (various forms of iron sulfide mixed with contaminants) is the least understood and most prominent contamination problem in pipelines and their compression equipment. The information documented in this report was gathered from technical literature, the Internet, researchers, experts, practitioners in the natural gas industry, field experience, and equipment manufacturers' publications. This search has determined that there is much expert knowledge in the technical community concerning many aspects of the iron sulfide problem, however, there is only a limited understanding by those in the gas industry that face the problem. This report discusses information gathered as a part of the research, including a section with references to retrievable literature used.
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Vivak Malhotra. Value-Added Products from FGD Sulfite-Rich Scrubber Materials. Office of Scientific and Technical Information (OSTI), gennaio 2010. http://dx.doi.org/10.2172/1005230.

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Vivak M. Malhotra. Value-Added Products From FGD Sulfite-Rich Scrubber Materials. Office of Scientific and Technical Information (OSTI), settembre 2006. http://dx.doi.org/10.2172/914709.

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Berkowitz, Jacob, e Christine VanZomeren. Approaches to identify and monitor for potential acid sulfate soils in an ecological restoration context. Engineer Research and Development Center (U.S.), febbraio 2022. http://dx.doi.org/10.21079/11681/43349.

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Potential acid sulfate soils include materials with the capacity to generate acidity under certain environmental conditions. As such, these soils can pose challenges to ecological restoration projects occurring in wetlands and nearshore environments. To provide guidance for ecosystem restoration practitioners, the following technical note describes acid sulfate soil formation and distribution and then describes techniques for identifying and monitoring acid sulfate soil conditions prior to and following implementation of restoration activities. Finally, this technical note outlines a number of tools and recently published resources to help avoid unintended consequences of acid sulfate soil disturbance and achieve ecological restoration objectives.
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Nostrand, M. New Mid-IR Lasers Based on Rare-Earth-Doped Sulfide and Chloride Materials. Office of Scientific and Technical Information (OSTI), settembre 2000. http://dx.doi.org/10.2172/15013357.

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Buonassisi, Tonio, e Roy G. Gordon. Next Generation Sulfide Materials: Optimizing CZTS and Developing SnS by Systematic Defect Engineering. Office of Scientific and Technical Information (OSTI), settembre 2011. http://dx.doi.org/10.2172/1413203.

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