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Auteur : Grafiati
Publié le 7 juillet 2024

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1

MENDES-FERREIRA, A., A. MENDES-FAIA et C. LEÃO. « Survey of Hydrogen Sulphide Production by Wine Yeasts ». Journal of Food Protection 65, no 6 (1 juin 2002) : 1033–37. http://dx.doi.org/10.4315/0362-028x-65.6.1033.

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Twenty-one strains of commercial wine yeasts and 17 non-Saccharomyces species of different provenance were surveyed for their ability to produce hydrogen sulphide in synthetic grape juice medium indicator agar with different nitrogen sources, as well as in natural grape juice. Bacto Biggy agar, a commercially available bismuth-containing agar, was used to compare our results with others previously reported in the literature. Under identical physiological conditions, the strains used in this study displayed similar growth patterns but varied in colony color intensity in all media, suggesting significant differences in sulphite reductase activity. Sulphite reductase activity was absent for only one strain of Saccharomyces cerevisiae. All other strains produced an off-odor to different extents, depending significantly (P <0.05) on medium composition. Within the same species of some non-Saccharomyces yeasts, strain variation existed as it did for Saccharomyces. In natural musts, strains fell into three major groups: (i) nonproducers, (ii) must-composition-dependent producers, and (iii) invariable producers. In synthetic media, the formation of sulphide by strains of S. cerevisiae results from the reduction of sulphate. Therefore, this rapid screening methodology promises to be a very useful tool for winemakers for determining the risk of hydrogen sulphide formation by a given yeast strain in a specific grape juice.
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Takahashi, Junichi, Nobuyuki Johchi et Hiroshi Fujita. « Inhibitory effects of sulphur compounds, copper and tungsten on nitrate reduction by mixed rumen micro-organisms ». British Journal of Nutrition 61, no 3 (mai 1989) : 741–48. http://dx.doi.org/10.1079/bjn19890159.

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1. The inhibitory effects of inorganic and organic sulphur-containing compounds, copper and tungsten on nitrate reduction by mixed rumen micro-organisms were investigated in two in vitro studies.2. Coarsely strained rumen fluid from nitrate-adapted (Expt 1) or non-adapted (Expt 2) Suffolk Down wethers maintained on lucerne (Medicago sativa) cubes was used as an inoculum. In Expt 1, anaerobic incubation was carried out for 24 h for each medium supplemented with 10 mM-sodium nitrate and the following chemicals: 0, 1, 2, 3, 5, 8 and 10 mM-sodium sulphide, 1 and 10 mM-sodium sulphite, 1 and 10 mM-sodium sulphate, 1 and 10 mM-L-cysteine, 1 and 10 mM-DL-methionine, 1 mM-sodium tungstate and I mM-copper sulphate. In Expt 2, 1 and 10 mM-Na2S, 1 and 10 mM-L-cysteine, 1 mM-Na2WO4, and 1 mM-CuSO4were added to incubation media to test for chemical inhibition of microbial reduction of nitrate.3. In Expt 1, the amount of nitrite formed decreased with increasing concentration of sulphide-S added. The additions of L-cysteine, W and Cu suppressed nitrite formation in media from both nitrate-adapted and non-adapted sheep.4. In contrast to the effects of sulphide, L-cysteine and W counteracted, to some degree, nitrate-induced reduction of volatile fatty acid (VFA) production. Addition of Cu to the media resulted in a further depression of VFA production.
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Jeroschewski, Paul, Karen Haase, Andreas Trommer et Peter Gr�ndler. « Galvanic sensor for the determination of hydrogen sulphide/sulphide in aqueous media ». Fresenius' Journal of Analytical Chemistry 346, no 10-11 (1993) : 930–33. http://dx.doi.org/10.1007/bf00322753.

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Massacci, P., M. Recinella et L. Piga. « Factorial experiments for selective leaching of zinc sulphide in ferric sulphate media ». International Journal of Mineral Processing 53, no 4 (mai 1998) : 213–24. http://dx.doi.org/10.1016/s0301-7516(98)00002-7.

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Vukovic, Milovan, Nada Strbac, Miroslav Sokic, Vesna Grekulovic et Vladimir Cvetkovski. « Bioleaching of pollymetallic sulphide concentrate using thermophilic bacteria ». Chemical Industry 68, no 5 (2014) : 575–83. http://dx.doi.org/10.2298/hemind130905087v.

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An extreme thermophilic, iron-sulphur oxidising bacterial culture was isolated and adapted to tolerate high metal and solids concentrations at 70?C. Following isolation and adaptation, the culture was used in a batch bioleach test employing a 5-l glass standard magnetic agitated and aerated reactor, for the bioleaching of a copper-lead-zinc collective concentrate. The culture exhibited stable leach performance over the period of leach operation and overall copper and zinc extractions higher than 97%. Lead sulphide is transformed into lead sulphate remaining in the bioleach residue due to the low solubility in sulphate media. Brine leaching of bioleach residue yields 95% lead extraction.
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Wilton, Derek H. C., Gary M. Thompson et Dawn Evans-Lamswood. « MLA-SEM Characterization of Sulphide Weathering, Erosion, and Transport at the Voisey’s Bay Orthomagmatic Ni-Cu-Co Sulphide Mineralization, Labrador, Canada ». Minerals 11, no 11 (4 novembre 2021) : 1224. http://dx.doi.org/10.3390/min11111224.

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The Voisey’s Bay nickel-copper-cobalt (Ni-Cu-Co) sulphide deposits constitute a significant resource of orthomagmatic mineralization. The deposits are not exposed at the surface except for in a small ferruginous gossan (Discovery Hill). The subsequent geophysical surveys and diamond drilling led to the discovery of the Ovoid ore body, buried beneath 20 m of till, and other deeper deposits in the bedrock. This study was initiated to characterize the sulphide mineralogy of these deposits through various stages of weathering, erosion, and transport. Because the samples ranged from bedrock through to a variety of surficial sediment types, the automated SEM-based identification provided by the MLA-SEM system was the ideal technique to quantitatively evaluate mineral distributions in the different media. The derived MLA-SEM data indicate that, aside from the Discovery Hill gossan, the surface sulphide mineralization at Voisey’s Bay was weathered in a pre-glaciation regolith at the Mini-Ovoid deposit and, on the surface of the Ovoid deposit, the massive sulphide was unoxidized due to a thin calcite-cemented clay cover. Pentlandite is very preferentially oxidized compared to other sulphides in the Voisey’s Bay ore, to depths of up to 10 m in bedrock. Conversely, within the coarse reject samples of crushed drill cores stored in sealed plastic bags, pyrrhotite was altered, whereas pentlandite and chalcopyrite are stable, presumably due to anaerobic reactions. The MLA-SEM detected trace amounts of minute sulphide grains in surficial sediments, but their contents abruptly decreased with distance from the sulphide mineralization. Microtextures such as troilite and pentlandite exsolution or twinning in pyrrhotite, however, could be observed in the fine sulphide grains from till, suggesting a derivation from orthomagmatic sulphide material, such as the Voisey’s Bay mineralization.
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Dutrizac, J. E. « The leaching of sulphide minerals in chloride media ». Hydrometallurgy 29, no 1-3 (juin 1992) : 1–45. http://dx.doi.org/10.1016/0304-386x(92)90004-j.

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8

Tan, J., et R. K. Hailstone. « Gold–sulphide versus sulphide centres on (111) AgBr surfaces : characterization and mechanism ». Imaging Science Journal 52, no 4 (décembre 2004) : 202–11. http://dx.doi.org/10.1179/136821904x6442.

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Miyamoto, Yasushi, et Chitose Iwanaga. « Effects of sulphide on anoxia-driven mortality and anaerobic metabolism in the ark shell Anadara kagoshimensis ». Journal of the Marine Biological Association of the United Kingdom 97, no 2 (21 mars 2016) : 329–36. http://dx.doi.org/10.1017/s0025315416000412.

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Reduction in survival under hypoxic conditions in the presence of sulphide has been repeatedly demonstrated in various benthic invertebrates. However, the reason for this reduction has not yet been clearly elucidated. In this study, the effects of sulphide accumulation on anoxic survival and anaerobic metabolism were investigated in the ark shell Anadara kagoshimensis. Ark shells from western Japan were experimentally exposed to 3 sulphide-accumulation levels under sustained anoxic conditions: accumulated H2S treatment (static incubation), decreased H2S treatment (semi-static incubation with daily replacement of incubation media), and inhibited H2S treatment (static incubation with the addition of antibiotics). Moreover, the effect of antibiotics on anoxic survival was examined under sulphide exposure. The decreased H2S and inhibited H2S treatments resulted in 1.5- and 3-fold increase in the anoxic survival time, respectively, when compared with the accumulated H2S treatment. Under anoxic sulphide exposure, the antibiotics addition did not affect survival time, suggesting the shorter survival time in the accumulated H2S incubation was probably due to sulphide toxicity. Glycogen consumption and propionate accumulation, which indicate activation of anaerobic metabolism, were observed in both accumulated and inhibited H2S treatments. However, glycogen consumption was significantly higher in the accumulated H2S treatment after a significant sulphide accumulation was detected in the incubation media. In addition, survival in the accumulated H2S treatment decreased rapidly, whereas no significant mortality was observed in the inhibited H2S throughout the experiment. These results likely suggest that the accelerated anoxic-driven mortality in sulphide-rich environments was partly due to the faster breakdown of glycogen.
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10

Camarillo, Mary Kay, William T. Stringfellow, Jeremy S. Hanlon et Elizabeth Basha. « Performance of sanitary sewer collection system odour control devices operating in diverse conditions ». Water Science and Technology 68, no 12 (24 octobre 2013) : 2527–33. http://dx.doi.org/10.2166/wst.2013.492.

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Controlling odours from sanitary sewer systems is challenging as a result of the expansive nature of these systems. Addition of oxidizing chemicals is often practiced as a mitigation strategy. One alternative is to remove odorous compounds in the gases vented from manholes using adsorptive media. In this study, odour control devices located at manholes were observed to determine the ability of these systems to reduce hydrogen sulphide from vented gases. The odour control devices incorporated pressure regulation to control gas flow out of manhole covers and adsorptive media to remove hydrogen sulphide in the vented gases prior to release. Pressure regulation was accomplished using a variable volume bladder and two pressure relief valves that permitted gas flow when pressures exceeded 1.3 to 2.5 cm water column. The reduction in gas flow vented from manholes was intended to extend the service life of the adsorptive media, as compared with odour control devices that do not incorporate pressure modulation. Devices were deployed at four locations and three adsorptive media were tested. Although measured collection system hydrogen sulphide concentrations varied from zero to over 1,000 ppm, the removal rates observed using odour control devices were typically above 90%. The lower removal rates observed at one of the sites (50.5 ± 36.1%) appeared related to high gas flow rates being emitted at this location. Activated carbon was used in most of the tests, although use of iron media resulted in the highest removal observed: 97.8 ± 3.6%. The expected service life of the adsorptive media contained within the odour control devices is a function of site-specific hydrogen sulphide concentrations and gas flow rates. The units used in this study were in service for more than 8 to 12 months prior to requiring media replacement.
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Soreanu, Gabriela, Patricia Falletta, Michel Béland, Kara Edmonson et Peter Seto. « Study on the Performance of an Anoxic Biotrickling Filter for the Removal of Hydrogen Sulphide from Biogas ». Water Quality Research Journal 43, no 2-3 (1 mai 2008) : 211–18. http://dx.doi.org/10.2166/wqrj.2008.024.

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Abstract The paper presents aspects related to the performance of an anoxic biotrickling filter designed for hydrogen sulphide (H2S) removal from biogas. In this process, nitrate was supplied through a nutrient solution as an electron acceptor for anoxic growth of H2S-oxydizing microorganisms. The biotrickling filter's packing media consisted of a layer of plastic fibres over volcanic rocks in a ratio 0.78:1 by volume. The total volume of packing media was 0.014 m3. Several H2S loading rates (IL) were tested under continuous dynamic conditions, ranging between 20 and 550 g of H2S feed/(m3bed·day). Maximum process performance (>95%) was observed for IL ranging up to approximately 300 g of H2S feed/(m3bed·day). The degradation of hydrogen sulphide occurred with the formation of both sulphate and elemental sulphur, their formation ratio being dependent on H2S loading rate. Elemental sulphur was found to be the dominant degradation product, particularly at IL > 96.18 g of H2S feed/(m3bed·day). The use of two biotrickling filters in series was also tested, and a significant improvement in process performance was observed. This technology allows simple operation with low maintenance and has the potential for sulphur recovery.
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Otero, T. F., et C. Achucarro. « Corrosion of mild steel in media containing sulphide ions ». British Corrosion Journal 28, no 3 (janvier 1993) : 194–200. http://dx.doi.org/10.1179/000705993798318506.

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13

Awe, Samuel A., Caisa Samuelsson et Åke Sandström. « Dissolution kinetics of tetrahedrite mineral in alkaline sulphide media ». Hydrometallurgy 103, no 1-4 (juin 2010) : 167–72. http://dx.doi.org/10.1016/j.hydromet.2010.03.014.

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14

Dutrizac, J. E. « The leaching of silver sulphide in ferric ion media ». Hydrometallurgy 35, no 3 (juin 1994) : 275–92. http://dx.doi.org/10.1016/0304-386x(94)90056-6.

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15

Quezada, Víctor, Antoni Roca, Oscar Benavente, Montserrat Cruells, Evelyn Melo et María Hernández. « Pretreatment to Leaching for a Primary Copper Sulphide Ore in Chloride Media ». Metals 11, no 8 (10 août 2021) : 1260. http://dx.doi.org/10.3390/met11081260.

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The dissolution of copper sulphide ores continues to be a challenge for the copper industry. Several media and leaching alternatives have been proposed to improve the dissolution of these minerals, especially for the leaching of chalcopyrite. Among the alternatives, pretreatment prior to leaching was proposed as an option that increases the dissolution of copper from sulphide ores. In this study, a mineral sample from a copper mining company was used. The copper grade of the sample was 0.79%, and its main contributor was chalcopyrite (84%). The effect of curing time (as pretreatment) in a chloride media on copper sulphide ore was evaluated at various temperatures: 25, 50, 70 and 90 °C. The pretreated sample and leaching residues were characterized by X-ray diffraction, scanning electron microscopy, and reflected light microscopy. Pretreatment products such as CuSO4, NaFe3(SO4)2(OH)6, and S0 were identified although with difficulty, due to the low presence of chalcopyrite in the initial sample (1.99%). Under the conditions of 15 kg/t of H2SO4, 25 kg/t of NaCl, and 15 days of curing time, a copper extraction of 93.1% was obtained at 90 °C with 50 g/L of Cl− and 0.2 M of H2SO4.
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Wang, Ning, Jaeyoung Park, Eric A. Evans et Timothy G. Ellis. « Characterization of recycled rubber media for hydrogen sulphide (H2S) control ». Environmental Technology 35, no 19 (6 mai 2014) : 2500–2505. http://dx.doi.org/10.1080/09593330.2014.911359.

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17

Yelloji Rao, M. K., et K. A. Natarajan. « Electrochemical aspects of grinding media-mineral interaction on sulphide flotation ». Bulletin of Materials Science 10, no 5 (août 1988) : 411–22. http://dx.doi.org/10.1007/bf02744654.

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Zhalgasuly, N., A. V. Kogut et A. A. Ismailova. « INVESTIGATION OF LEAVE LEVEL OF COPPER ORE OF ZHEZKAZGAN DEPOSIT ». Mining science and technology, no 2 (12 août 2018) : 14–22. http://dx.doi.org/10.17073/2500-0632-2018-2-14-20.

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In the conditions of the Zhezkazgan copper deposit, which is worked underground, the losses of ore in the left pillars fluctuate from 12 to 25 %, sometimes reaching 40%. During the development of the Zhezkazgan deposit, tens of millions of tons of rich ore were left in various kinds of losses. The annual increase in ore losses in various parts, taking into account the increasing production, is approximately equal to the annual productivity of the whole mine. Also in the production process so far rich in content of the interlayer copper ores of low power. Therefore, the search for the most effective methods of mining lost, off-balance and waste ores is of paramount importance. One of such methods is underground leaching, which allows to carry out their secondary development and make maximum use of the mineral wealth. The aim of the research was to experimentally study the leaching of oxidized, mixed and sulphide copper ores of the old spent mines in the Zhezkazgan deposit using various solvents. The squeezing of oxide and sulphide rudes was carried out in 2 stages, when the durability of the experimental crests was 35 hours and the durable 294 hours. The oxidant-sulphide ore is 20 mm high and can be cured at 50-80 % media, for 10 months. For the period of time, the chalcocin rudus is derived from 30 to 50 % of media, and from 5 to 12 % of bernital chalcopyrite, which results in the effectiveness of the subsequent method of squeezing the effluent. The best dissolves are acidic acid (5-10 g/l) and acidified sulphate oxide (5 g/l). Residual cystic acid production and development of oxidant processes up to 1.6-3.2 t/t for medium oxidized rudder and up to 2.54.1 t/t for chalcocin rudder, which acts as a catalyst for thawing technical and economic indicators.
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Li, Fengwang, Shu-Feng Zhao, Lu Chen, Azam Khan, Douglas R. MacFarlane et Jie Zhang. « Polyethylenimine promoted electrocatalytic reduction of CO2to CO in aqueous medium by graphene-supported amorphous molybdenum sulphide ». Energy & ; Environmental Science 9, no 1 (2016) : 216–23. http://dx.doi.org/10.1039/c5ee02879e.

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Amorphous molybdenum sulphide immobilized on polyethylenimine modified reduced graphene oxide can catalyse the electroreduction of CO2to CO or “syngas” in aqueous media with high efficiency.
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Neira, Andrés, Diana Pizarro, Víctor Quezada et Lilian Velásquez-Yévenes. « Pretreatment of Copper Sulphide Ores Prior to Heap Leaching : A Review ». Metals 11, no 7 (2 juillet 2021) : 1067. http://dx.doi.org/10.3390/met11071067.

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Although the main cause of hydrometallurgical plant closures is the depletion of oxidized copper minerals reserves, the lack of new hydrometallurgy projects also contributes to these closures. One solution is to be able to process copper sulphide ores hydrometallurgically. However, it is widely known that sulphide copper ores—and chalcopyrite in particular—have very slow dissolution kinetics in traditional leaching systems. An alternative to improve the extraction of copper from sulphide ores is the use of a pretreatment process. Several investigations were developed evaluating the effects of pretreatment, mainly in the extraction of copper from chalcopyrite in chloride media. This study presents a review of various pretreatment methods prior to heap leaching to aid in the dissolution of copper from sulphide ores. Different variables of pretreatment that affect the extraction of copper were identified, including the type of salts used in agglomeration, curing time, and curing temperatures. Successful cases such as the implementation of the CuproChlor® process (use of calcium chloride), and various pilot studies using sodium chloride and temperature, show that pretreatment is an alternative that aids in the dissolution of copper from sulphide ores.
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Koe, L. C. C., et F. Yang. « A bioscrubber for hydrogen sulphide removal ». Water Science and Technology 41, no 6 (1 mars 2000) : 141–45. http://dx.doi.org/10.2166/wst.2000.0103.

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A study was carried out to investigate the feasibility of using treated wastewater effluent to support the operation of a fixed-film bioscrubber for odorous H2S removal. A laboratory scale fixed-film bioscrubber was set up using bacteria of the genus Thiobacillus. The bacteria were isolated from a sample of municipal sludge, cultured in the laboratory and immobilised onto the scrubber's plastic packing media by an immersion method. Series of experimental runs were carried out to determine the optimal operational conditions for the bioscrubber. Results indicated that for the gas retention times equal to or exceedingfive seconds, and with a H2S loading rate below 90 g-H2S/m3-hr, the bioscrubber could remove H2S and odour with efficiencies greater than 99%. The behaviour of the bio-scrubber under various operation scenarios arepresented and discussed in this paper.
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MICHAEL, M. SILUVAI, M. PUSHPAVANAM et K. BALAKRISHNAN. « Electrochemical assessment of corrosion behaviour of zinc and zinc-nickel alloys in aqueous chloride, sulphide, and chloride-sulphide media ». British Corrosion Journal 30, no 4 (janvier 1995) : 317–19. http://dx.doi.org/10.1179/bcj.1995.30.4.317.

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MICHAEL, M. SILUVAI, M. PUSHPAVANAM et K. BALAKRISHNAN. « Electrochemical assessment of corrosion behaviour of zinc and zinc-nickel alloys in aqueous chloride, sulphide, and chloride-sulphide media ». British Corrosion Journal 30, no 4 (1 janvier 1995) : 317–19. http://dx.doi.org/10.1179/000705995798113781.

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Salminen, Reijo, et Pekka Sipilä. « The environmental impact of sulphide mines measured with organogenic sampling media ». Applied Geochemistry 11, no 1-2 (janvier 1996) : 277–83. http://dx.doi.org/10.1016/0883-2927(95)00039-9.

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Can, N. Metin, et Çağrı Başaran. « Effects of Different Grinding Media and Milling Conditions on the Flotation Performance of a Copper-Pyrite Ore ». Minerals 13, no 1 (5 janvier 2023) : 85. http://dx.doi.org/10.3390/min13010085.

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Different milling conditions, such as wet or dry, and use of different grinding media have a great impact on the flotation performance of sulphide minerals. In the present study, the effects of wet and dry grinding and the use of different grinding media, such as mild steel (MS) and stainless steel (SS), were investigated on a Cu-sulphide ore. The samples were ground as dry and wet with both grinding media, to a P80 value of −75 µm, and then flotation was carried out under the same conditions. The obtained data from flotation were evaluated in terms of solid/water recovery, chalcopyrite/pyrite recovery and separation efficiency. The effects of different milling conditions were discussed with the measured chemical parameters such as redox potential and dissolved oxygen level together with the flotation rate of chalcopyrite. The redox potential of the dry ground ore, irrespective of the type of milling media, was measured considerably higher than the wet grinding conditions. With SS media flotation, the rate of Cu was high for dry grinding, resulting in a higher selective concentrate in terms of grade. However, Cu recovery was lower due to the instability of the froth structure. Separation efficiency pointed out that the best flotation performance could be obtained using a wet grinding condition with MS balls.
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Menshikov, Ivan A., et Anatoliy B. Shein. « PROTECTIVE PROPERTIES OF «SOLING» SERIES INHIBITORS IN ACIDIC MEDIA CONTAINING HYDROGEN SULPHIDE ». IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no 7 (18 juin 2018) : 91. http://dx.doi.org/10.6060/ivkkt.20186107.5703.

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The work presents the results of the study of a number of inhibitory compositions of the “Soling” series based on acetylenic alcohols and their mixtures with nitrogen-containing compounds of various types in a hydrochloric acid (0.1 M HCl) containing 100 ppm of hydrogen sulphide. Gravimetric tests and electrochemical studies were performed on mild steel St3 at ambient temperature. The exposure time of the samples was 24 h. Polarization curves were obtained in a three-electrode cell, using the SOLARTRON 1280 C electrochemical measuring complex. The following protective compositions were studied: Soling IK-1 on the basis of unsaturated alcohol in a mixture with sulfur-containing amide in an aqueous medium; Soling IK-2 on the basis of unsaturated alcohol with additions of quaternary ammonium salt and complexone; Soling IK-3 on the basis of unsaturated alcohol in the system of organic solvents, as well as Soling IK-4(A) on the basis of a high-molecular nitrogen-containing surfactant (molecular weight from 300 to 400) with additions of unsaturated alcohol in a system of organic solvents and Soling IR-4(B) based on a high-molecular nitrogen-containing surfactant with a molecular weight of up to 300. It has been obtained that the use of unsaturated alcohols without additives in the presence of hydrogen sulphide is possible only at sufficiently high concentrations. At low concentrations, the corrosion process is markedly stimulated (composition IK-3). In a mixture with nitrogen-containing compounds (compositions IK-1, IK-2, IK-4(A)) it is possible to achieve high protective effect allowing the use of these compositions for hydrogen sulfide-containing media. The most effective are the compositions IK-2 and IK-4(A), for which the protective effect reaches the values of 97 and 90%, respectively, and also these compositions in the whole range of concentrations studied eliminate the appearance of hydrogen blistering. In most cases, the studied compositions are characterized by effective inhibition of the partial cathodic process. For SolIng IK-2 inhibition of the partial anodic reaction is clearly expressed.Forcitation:Menshikov I.A., Shein A.B. Protective properties of «Soling» series inhibitors in acidic media containing hydrogen sulphide. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 90-97
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Skerman, A. G., S. Heubeck, D. J. Batstone et S. Tait. « Low-cost filter media for removal of hydrogen sulphide from piggery biogas ». Process Safety and Environmental Protection 105 (janvier 2017) : 117–26. http://dx.doi.org/10.1016/j.psep.2016.11.001.

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de Bruyn, E. E., et T. E. Cloete. « Media for the detection of sulphide-producing bacteria in industrial water systems ». Journal of Microbiological Methods 17, no 4 (juin 1993) : 261–71. http://dx.doi.org/10.1016/0167-7012(93)90055-m.

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Martin, C. J., R. E. McIvor, J. A. Finch et S. R. Rao. « Review of the effect of grinding media on flotation of sulphide minerals ». Minerals Engineering 4, no 2 (1991) : 121–32. http://dx.doi.org/10.1016/0892-6875(91)90028-t.

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ORTÍZ-CORONA, J., et F. J. RODRÍGUEZ-GÓMEZ. « Role of copper in tarnishing process of silver alloys in sulphide media ». Transactions of Nonferrous Metals Society of China 29, no 12 (décembre 2019) : 2646–57. http://dx.doi.org/10.1016/s1003-6326(19)65171-x.

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Baruah, S., Gamolwan Tumcharern et Joydeep Dutta. « Chitosan Clad Manganese Doped Zing Sulphide Nanocrystallites for Biolabeling ». Advanced Materials Research 55-57 (août 2008) : 589–92. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.589.

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The synthesis of fluorescent nanocrystals is receiving a lot of attention for potential application in biological labeling as well as phosphors for field emission devices. Zinc sulphide doped with manganese (ZnS:Mn2+) is one of the most efficient electroluminescent phosphor displaying a wide emission band centred around 590 nm resulting from the intra-ionic transition in Mn2+ ions. We report a unique synthesis of zinc sulphide nanoparticles doped with manganese using a biocompatible passivating agent ‘chitosan’, with bright luminescence peaking at 590 nm. This high luminescence efficiency of the synthesized nanocrystals are ideal for quantum dot based bio-labeling applications. Synthesis of the nanoparticles was carried out by precipitation reaction in aqueous media of zinc acetate and sodium sulphide where manganese acetate was added as the dopant. The obtained nanoparticles were around 4 to 6 nm in size and were found to be stable for months of shelf life. The photoluminescence intensity did not degrade when the colloid was heated up to 65 oC for prolonged periods.
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Abraitis, P. K., R. A. D. Pattrick, G. H. Kelsall et D. J. Vaughan. « Acid leaching and dissolution of major sulphide ore minerals : processes and galvanic effects in complex systems ». Mineralogical Magazine 68, no 2 (avril 2004) : 343–51. http://dx.doi.org/10.1180/0026461046820191.

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AbstractThe kinetics and mechanisms of dissolution of the major base metal sulphide minerals, pyrite, chalcopyrite, galena and sphalerite in acidic (chloride) media have been investigated. Minerals were ground in air, then dissolved in air-equilibrated solutions at pH 2.5, while monitoring the redox potential. Solution samples were analysed by ICP-AES and HPLC, and surfaces of residual sulphides analysed using XPS. Dissolution of aerial oxidation products on pyrite particles in the first 15 min apparently led to a sulphur-rich surface, and was followed by slower dissolution of pyrite itself, driven by oxygen reduction, and resulting in net production of protons. Chalcopyrite dissolution resulted in a Cu, S-rich (near) surface layer, accompanied by net consumption of protons. Apparently incongruent dissolution of galena and sphalerite may reflect the formation of elemental S at the surface. The rates of dissolution of chalcopyrite, galena and sphalerite in the presence of pyrite were determined, respectively, as 18, 31 and 1.5 times more rapid than in single-mineral experiments. These data were consistent with galvanically-promoted mineral oxidation of the other sulphides in the presence of pyrite. In the case of galena, the experimental data suggested extensive release of Pb ions and development of a sulphur-rich surface during galvanically-promoted dissolution.
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Shi, G. M., et Y. C. Zhou. « The impact of SAG pebbles as media vs steel media on flotation performance of a copper sulphide ore ». Canadian Metallurgical Quarterly 58, no 3 (15 mars 2019) : 362–66. http://dx.doi.org/10.1080/00084433.2019.1590038.

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Isakaev, E. Kh, et V. B. Mordynskii. « Corrosion cracking resistance of deposited self-fluxing alloys in hydrogen sulphide-containing media ». Welding International 23, no 12 (décembre 2009) : 939–43. http://dx.doi.org/10.1080/09507110903291934.

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Skerman, A. G., S. Heubeck, D. J. Batstone et S. Tait. « Alternative low-cost solid media for scrubbing of hydrogen sulphide from piggery biogas ». Animal Production Science 55, no 12 (2015) : 1461. http://dx.doi.org/10.1071/anv55n12ab051.

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Basil, D. K., A. K. Bhattamishra, S. C. Dev et Inder Singh. « Studies on corrosion behaviour of Cu‐Si alloys in Sulphide and Chloride media ». Anti-Corrosion Methods and Materials 42, no 5 (mai 1995) : 14–16. http://dx.doi.org/10.1108/eb007368.

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Aeiyach, S., et P. C. Lacaze. « Anodic and cathodic electrochemical ‘ring-opening’ polymerization of styrene sulphide in organic media ». Polymer 30, no 4 (avril 1989) : 752–55. http://dx.doi.org/10.1016/0032-3861(89)90167-5.

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Branzei, Mihai, Mihai Ovidiu Cojocaru, Leontin Nicolae Druga et Mariana Ion. « Obtaining the Controlled Sulphonitrocarburized Layer Phase Compositions, by the Variation of the Solid Powdery Medium Components ». Revista de Chimie 71, no 7 (4 août 2020) : 225–33. http://dx.doi.org/10.37358/rc.20.7.8240.

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Simultaneous saturation of the metallic surface with sulphur, nitrogen and carbon � named sulphonitrocarburizing (SNC) process - may be carried out in a multitude of variants, differ in media state of aggregation which provide the elements in native state, or differ in phase composition. The most commonly used media in SNC process are liquid or gaseous and from standpoint of phase composition, there are media made of compounds generator of the cyanides, representing important source of carbon and nitrogen, and as a sulphur source, may be used iron sulphide, sodium sulphide, sodium thiocyanides or ammonium. Carbamide/urea (CON2H4) it is frequently used in the media composition met in nitro-carburizing or carbo-nitriding process, alongside being added carbonates (sodium or potassium carbonate), thus resulting in cyanides (primary sources of the elements helping superficial saturation of the metallic products), as a result of the reactions which take place at the operating temperature of process. The medium toxicity decreased, based on carbamide used in nitrocarburizing and in particular, SNC process, being possible by carbonates replacing with ammonium chloride. This paper quantify the possibility of using solid powder mixture constituted of carbamide, in order to achieve SNC process of the iron matrix and effects quantification varying the percentage of the solid powdery mixture, so that it becomes possible to control the layer phase composition, by modifying the phase composition of the powder mixture used in thermo chemical processing.
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Feng, Jin Peng, Xia Feng, Shao Jian Ma, Jie Liu, Wei Mo, Jin Lin Yang et Xiu Juan Su. « Study on Grinding Kinetics of a Unique Double-Sphere Grinding Media for Cassiterite-Polymetallic Sulphide Ores ». Applied Mechanics and Materials 457-458 (octobre 2013) : 236–39. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.236.

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The grinding kinetics are strongly affected by the grinding media size and style, in order to improve the grinding efficiency and solve the over-grinding problem of cassiterite in the process of grinding in cassiterite-polymetallic sulfide ores plant. A unique double-sphere grinding media has been designed and the grinding kinetics of this media with different diameters for grinding products of different size fractions have been investigated in this paper.
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Povolotskaya, Anna, Eduard Gorkunov, Sergey Zadvorkin et Igor Veselov. « Studying the effect of elastic-plastic strain and hydrogen sulphide on the magnetic behaviour of pipe steels as applied to their testing ». MATEC Web of Conferences 145 (2018) : 05003. http://dx.doi.org/10.1051/matecconf/201814505003.

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The paper reports results of magnetic measurements made on samples of the 12GB pipe steel (strength group X42SS) designed for producing pipes to be used in media with high hydrogen sulphide content, both in the initial state and after exposure to hydrogen sulphide, for 96, 192 and 384 hours under uniaxial elastic-plastic tension. At the stage of elastic deformation there is a unique correlation between the coercive force measured on a minor hysteresis loop in weak fields and tensile stress, which enables this parameter to be used for the evaluation of elastic stresses in pipes made of the 12 GB pipe steel under different conditions, including a hydrogen sulphide containing medium. The effect of the value of preliminary plastic strain, viewed as the initial stress-strain state, on the magnetic behaviour of X70 pipe steels under elastic tension and compression is studied. Plastic strain history affects the magnetic behaviour of the material during subsequent elastic deformation since plastic strain induces various residual stresses, and this necessitates taking into account the initial stress-strain state of products when developing magnetic techniques for the determination of their stress-strain parameters during operation.
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Hailstone, R. K., J. French et R. De Keyzer. « Sulphide centres on AgIBr (100) surfaces : characterization and energy levels ». Imaging Science Journal 51, no 1 (janvier 2003) : 21–32. http://dx.doi.org/10.1080/13682199.2003.11784411.

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Matrosov, Yury, Ivan Shabalov, Alexey Kholodnyi et Valery Velikodnev. « Steel for gas and oil pipelines resistant to destruction in hydrogen sulphide-containing media ». E3S Web of Conferences 121 (2019) : 04008. http://dx.doi.org/10.1051/e3sconf/201912104008.

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About a third reserves of the natural gas and oil contain H2S impurities, which, in the presence of moisture, form an acidic medium and can lead to pipeline destruction by the mechanisms of hydrogen-induced cracking (HIC) and sulfide stress cracking (SSC). With the growing number of hydrocarbon fields being developed with a high content of H2S, the demand for gas and oil large diameter pipes grade from ВМS to Х70MS with high resistance to HIC and SSC increases. Comprehensive studies have been carried out in laboratory and industrial conditions to determine the effect of the chemical composition and thermomechanical processing on the microstructure, mechanical properties and resistance to HIC of rolled plates from low-alloy pipe steels. Optimal concentration of segregating elements (С ≤ 0.06%, Mn ≤ 1.00%), and schedules of accelerated cooling after controlled rolling (Тsc ≥ Ar3; Тfc = 520±30°C; Vc ≥ 20°C/с) provide the high resistance to destruction in H2S-containing media due the formation of a homogeneous microstructure without developed central segregation heterogeneity was determined. According to the research results, the technology for manufacturing of plates for large-diameter pipes grade X52MS, X56MS, X60MS, and X65MS ordered for sour service was developed.
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Giovanelli, Debora, Nathan S. Lawrence, Li Jiang, Timothy G. J. Jones et Richard G. Compton. « Electrochemical determination of sulphide at nickel electrodes in alkaline media : a new electrochemical sensor ». Sensors and Actuators B : Chemical 88, no 3 (février 2003) : 320–28. http://dx.doi.org/10.1016/s0925-4005(02)00378-7.

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Udeajah, V. N., D. U. Onah et F. I. Ezema. « Structure of iron- doped lead sulphide (PbS) thin films made by SILAR technique for media room applications ». Chalcogenide Letters 19, no 10 (3 novembre 2022) : 753–59. http://dx.doi.org/10.15251/cl.2022.1910.753.

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The effect of iron-doping on lead sulphide (PbS) thin films deposited on glass substrates via successive ionic layer adsorption (SILAR) Technique using lead acetate, Pb(CH3COO)2, thioacetamide (S2H5NS), Iron (II) Chloride dehydrate (FeCl2. 2H2O), ethanol and ammonia in alkaline medium annealed between 283K and 500K was investigated. The structural and morphological studies were performed by X-ray diffraction (XRD) Analysis and scanning electron microscopy (SEM) respectively. The XRD showed that PbS thin films were cubic and face-centred crystalline
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Holešinský, Radim, Božena Průšová, Mojmír Baroň, Jaromír Fiala, Petra Kubizniakova, Vít Paulíček et Jiří Sochor. « Spontaneous fermentation in wine production as a controllable technology ». Potravinarstvo Slovak Journal of Food Sciences 14 (28 septembre 2020) : 692–703. http://dx.doi.org/10.5219/1280.

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This study focuses on the isolation of a consortium of microorganisms from spontaneously fermenting must that naturally contain lactic acid bacteria, non-saccharomyces yeasts, and saccharomyces yeasts. To collect the greatest diversity of microorganisms, the consortium was taken from the point of micro-sparkling. Based on the growth curves, isolation was performed using individual special nutrient media, and the isolates were subsequently multiplied in the nutrient medium. Individual isolates were then used for fermentation tests to monitor the percentage of fermented sugar and hydrogen sulphide production. The highest fermentation abilities were achieved in the isolates containing Saccharomyces cerevisiae and Zygosaccharomyces bailii. The smallest amount of ethanol was formed from the isolates containing Hanseniaspora uvarum, while Candida sake isolate produced the lowest amount of hydrogen sulphide and Zygosaccharomyces bailii produced the highest. The other isolates produced an average amount. Based on these results, a consortium containing the given isolates in a certain ratio was compiled.
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Gaj, Kazimierz, et Klaudia Cichuta. « Combined Biological Method for Simultaneous Removal of Hydrogen Sulphide and Volatile Methylsiloxanes from Biogas ». Energies 16, no 1 (22 décembre 2022) : 100. http://dx.doi.org/10.3390/en16010100.

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Hydrogen sulphide (H2S) and volatile methylsiloxanes (VMSs) are key pollutants from the point of view of the operators of biogas plants. H2S poses corrosive hazards, while VMSs transform into difficult-to-remove deposits, reducing the availability and yield of biogas combustion equipment. This study provides a critical overview and evaluation (so-called SWOT analysis) of implemented and promising methods to reduce the content of the above pollutants in biogas, with particular emphasis on biological techniques. The aim of the analyses was to develop an innovative concept for a hybrid biological method for the combined removal of H2S and VMSs using the same device, i.e., a two-phase biotrickling filter (BTF), in which the organic phase that intensifies the mass transfer of VMSs is in the form of a low-viscosity methyl silicone oil. The finally developed technological schematic diagram includes the basic devices and media streams. The concept is characterized by closed media circuits and comprehensively solves the problem of purifying biogas from sewage sludge. In conclusion, key issues requiring further research are identified.
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Rogozhnikov, Denis, Oleg Dizer, Pavel Potapov et Sergey Mamyachenkov. « Thermodynamic patterns for hydrochemical oxidation of non-ferrous metal sulphide minerals in nitric acid media ». Proceedings of Irkutsk State Technical University 24, no 2 (avril 2020) : 460–74. http://dx.doi.org/10.21285/1814-3520-2020-2-460-474.

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Corin, K. C., Z. G. Song, J. G. Wiese et C. T. O'Connor. « Effect of using different grinding media on the flotation of a base metal sulphide ore ». Minerals Engineering 126 (septembre 2018) : 24–27. http://dx.doi.org/10.1016/j.mineng.2018.06.019.

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Hluštík, Petr, et Jiří Novotný. « The Testing of Standard and Recyclable Filter Media to Eliminate Hydrogen Sulphide from Sewerage Systems ». Water 10, no 6 (25 mai 2018) : 689. http://dx.doi.org/10.3390/w10060689.

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Sigaev, A. A. « Technology of production of welded joints in high‐hardness steels resistant in hydrogen sulphide media ». Welding International 9, no 2 (janvier 1995) : 143–45. http://dx.doi.org/10.1080/09507119509548769.

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