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Articoli di riviste sul tema "Sulphur dioxide"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 27 luglio 2024

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1

Anstice, P. J. C., e J. F. Alder. "The Effect of Sulphur Dioxide on the Adsorption Properties of Activated Carbon towards Chloropicrin". Adsorption Science & Technology 15, n. 7 (luglio 1997): 541–50. http://dx.doi.org/10.1177/026361749701500707.

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Sulphur dioxide is believed to be adsorbed on activated carbons in both physically and chemically bound states. Sulphuric acid and a variety of oxygenated and hydrated sulphur oxide species are believed to be present on humidified carbons exposed to sulphur dioxide. Samples of ASC/T impregnated carbons were exposed to sulphur dioxide mixtures in humid air at 80% RG and 22°C. The sulphur dioxide-loaded carbons were then exposed to chloropicrin challenge at 5 mg/dm3 in air at 80% RH and 22°C and the chloropicrin breakthrough times measured. A relationship was found between the extra mass gain of the carbons (due to oxygen and water) with increasing sulphur dioxide loading, as predicted by other workers. The effect of sulphur dioxide loading on the chloropicrin breakthrough times was a gradual reduction to about one-third the time for unexposed carbon, with an adsorbed mass of sulphur dioxide equal to ca. 10% of the carbon mass in a 20 mm bed-depth filter.

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2

Vale, Allister. "Sulphur Dioxide". Medicine 31, n. 10 (ottobre 2003): 74. http://dx.doi.org/10.1383/medc.31.10.74.27817.

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3

Vale, Allister. "Sulphur dioxide". Medicine 35, n. 12 (dicembre 2007): 656. http://dx.doi.org/10.1016/j.mpmed.2007.09.012.

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4

Vale, Allister. "Sulphur dioxide". Medicine 40, n. 3 (marzo 2012): 158. http://dx.doi.org/10.1016/j.mpmed.2011.12.009.

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5

Palmer, Anne S., Vin I. Morgan, Mark A. J. Curran, Tas D. van Ommen e Paul A. Mayewski. "Antarctic volcanic flux ratios from Law Dome ice cores". Annals of Glaciology 35 (2002): 329–32. http://dx.doi.org/10.3189/172756402781816771.

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AbstractExplosive volcanic eruptions can inject large quantities of sulphur dioxide into the stratosphere. the aerosols that result from oxidation of the sulphur dioxide can produce significant cooling of the troposphere by reflecting or absorbing solar radiation. It is possible to obtain an estimate of the relative stratospheric sulphur aerosol concentration produced by different volcanoes by comparing sulphuric acid fluxes determined by analysis of polar ice cores. Here,we use a non-sea-salt sulphate time series derived from three well-dated Law Dome ice cores to investigate sulphuric acid flux ratios for major eruptions over the period AD 1301–1995. We use additional data from other cores to investigate systematic spatial variability in the ratios. Only for the Kuwae eruption (Law Dome ice date AD 1459.5) was the H2SO4 flux larger than that deposited by Tambora (Law Dome ice date AD 1816.7).

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6

Nyitrai, Diána Sárdy, Zsuzsanna Varga, Annamária Sólyom-Leskó, Miklós Kállay, Szabina Steckl, Balázs Nagy, Dorottya Kocsis e Eszter Antal. "Analysis of a Special Sulphite-Producing Yeast Starter after Fermentation and during Wine Maturation". Applied Sciences 12, n. 17 (2 settembre 2022): 8848. http://dx.doi.org/10.3390/app12178848.

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In the present study, we investigated the extent to which specific sulphur dioxide-producing wine yeasts produce SO2 during alcoholic fermentation and whether the SO2 they produce is sufficient to prevent oxidation during wine storage. Fermentation was carried out at 12 °C and 20 °C. After inoculation with yeast, the evolution of free and total sulphurous acid concentrations, acetaldehyde concentrations (11.6–46.9 mg L−1) and total polyphenol concentrations (137.4–244.7 mg L−1), including leucoanthocyanin and catechin concentrations (leucoanthocyanidin: 8.5–75.1 mg L−1; catechin: 70.8–115.4 mg L−1), were investigated during the storage of fermented wines. The amount of free sulphur dioxide was measured between 5 and 10 mg L−1. Total sulphuric acid ranged from 6 to 22 mg L−1, taking into account the results of the three years studied. The aim of our tests was to observe whether the use of sulphur-producing yeasts during the ageing of fermented wines showed any benefit. The results of all three vintages tested showed that neither the 12 °C nor the 20 °C fermented batches showed any advantage in using sulphur dioxide-producing yeasts. Our results show that there is no clear evidence that the yeast produces sufficient sulphur dioxide during fermentation and that there is no clear demonstrable benefit from its use.

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7

Grace, B., T. J. Gillespie e K. J. Puckett. "Uptake of gaseous sulphur dioxide by the lichen Cladina rangiferina". Canadian Journal of Botany 63, n. 4 (1 aprile 1985): 797–805. http://dx.doi.org/10.1139/b85-102.

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Samples of the lichen Cladina rangiferina were exposed to various concentrations of sulphur dioxide in a fumigation cuvette system for time periods ranging from 1 to 18 h. The cuvette system provided airstreams which, within the limits of measurement, had identical flow rates, temperatures, and relative humidities. Sulphur dioxide was added to one airstream as a treatment, while the other remained free of sulphur dioxide for control purposes. In some experiments, wind speed could be varied from 8 to 250 cm∙s−1 in a small wind tunnel placed in the fumigation cuvette. The system allowed for the calculation of sulphur dioxide uptake by the lichen sample. Potassium release was shown to increase with an increasing uptake of sulphur dioxide (time-integrated flux), but was not uniquely related to sulphur dioxide concentration alone. Extrapolation of a linear transformation of the potassium release curve to zero potassium efflux resulted in a threshold uptake value of 240 μg SO2∙g lichen−1. Internal lichen resistance and lichen boundary-layer resistance were experimentally determined for later use in an electrical analog model for the calculation of sulphur dioxide uptake.

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8

BHARDWAJ, MUKESH K., JOGANDER SINGH e ANJUL SINGH. "IMPACT OF SULPHUR DIOXIDE EXPOSURE ON PHOTOSYNTHETIC PIGMENTS IN VIGNA MUNGO". Pollution Research 42, n. 01 (2023): 38–42. http://dx.doi.org/10.53550/pr.2023.v42i01.007.

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The present studies carried out on Vigna mungo regarding impacts of SO2 exposure on photosynthetic pigments clearly revealed that sulphur dioxide has deleterious effects on different photosynthetic pigments. These effects had become more significant when the plants were exposed to higher doses of sulphur dioxide. During the present investigation four concentrations, i.e. 0.1, 0.3, 0.5 and 0.7 ppm of sulphur dioxide were taken in consideration and their impact on biochemical contents i.e chlorophyll ‘a’, chlorophyll ‘b’, total chlorophyll and carotenoids in Vigna mungo was studied. The observations obtained clearly revealed that a significant reduction was observed in photosynthetic pigments of Vigna mungo. This impact was of great extent in such plants which were exposed to 0.7 ppm of sulphur dioxide as compared to those exposed to lower concentration of sulphur dioxide. It was also observed that the impact was not only dose dependent but also age dependent.

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9

Kovacs, Marius, Lorand Toth e Lăutaru Vlad. "Time evolution of sulphur dioxide concentration generated by solid fuel combustion systems during the cold periods of the year". MATEC Web of Conferences 389 (2024): 00042. http://dx.doi.org/10.1051/matecconf/202438900042.

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About 99% of sulphur dioxide present in the atmosphere comes from anthropogenic activities, the main source being industrial activity that processes sulphur materials, including burning fuels (coal, oil or gas), thus releasing sulphur dioxide into the air. The purpose of this paper is to monitor the concentration of sulphur dioxide during two seasons, in the ambient air of Petroșani, with the aim of highlighting the possible atmospheric pollution caused by thermal power plants that use solid fuel during the winter period. The monitoring periods were distributed over a period of 6 months (three in summer and three in winter), namely the summer months (May, June, July of 2022), the winter months of December (2022), January and February of 2023. The main objective of the measurements is to identify if there is an increase in sulphur dioxide concentration in the atmosphere, resulting from the burning of solid fuels from household activities during the winter period. Results indicate that there is a higher degree of SO2 pollution in the winter period, but the recorded values are far below the limits set by national legislation. The paper presents some measures to limit sulphur dioxide pollution in the context of climate change.

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10

Zhang, Hongyu, e Yunqian Cui. "Study of Sulphides Production Affecting the Fermentation Process of the Lager Beer". International Journal of Biology and Life Sciences 3, n. 1 (20 maggio 2023): 4–8. http://dx.doi.org/10.54097/ijbls.v3i1.9481.

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In the lager brewing production process, volatile sulphides such as sulphur dioxide, hydrogen sulphide, thiols and thioesters are produced by yeast metabolism during the fermentation of lager beer. Fluctuations in malt raw materials, yeast strain characteristics and fermentation process parameter adjustments can all have an impact on sulphides, and the concentration of sulphides in finished beer can have a negative impact on the sensory tasting of lager beer. This study investigated the fermentation of sulphides in lager beer under the conditions of dissolved wort oxygen, yeast recovery, fermentation temperature and pressure, and the results showed that the longer the yeast growth time, the later the fermentation of sulphur dioxide and the lower the sulphur dioxide content in the final beer by 10mg/L. The longer the yeast recovery days, the higher the fermentation of sulphur dioxide and hydrogen sulphide. The higher the content, the higher the fermentation temperature of the lager and the faster the fermentation rate, which favours a low sulphur dioxide content at the end of the main fermentation.

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11

Mulhauser, F., e H. Schneuwly. "Muon transfer to sulphur dioxide". Journal of Physics B: Atomic, Molecular and Optical Physics 26, n. 22 (28 novembre 1993): 4307–32. http://dx.doi.org/10.1088/0953-4075/26/22/032.

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12

Ponce de Leon, A., e H. R. Anderson. "Sulphur dioxide levels and asthma." Thorax 49, n. 10 (1 ottobre 1994): 1042. http://dx.doi.org/10.1136/thx.49.10.1042.

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13

Rose, Anthony H. "Sulphur dioxide and other preservatives". Journal of Wine Research 4, n. 1 (gennaio 1993): 43–47. http://dx.doi.org/10.1080/09571269308717947.

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14

Pavlinec, J., e M. Lazár. "Polypropylene Modified with Sulphur Dioxide". Journal of Macromolecular Science, Part A 35, n. 7 (luglio 1998): 1055–67. http://dx.doi.org/10.1080/10601329808002100.

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15

Binbrek, O. S., e A. Anderson. "Lattice Dynamics of Sulphur Dioxide". physica status solidi (b) 162, n. 2 (1 dicembre 1990): 421–27. http://dx.doi.org/10.1002/pssb.2221620212.

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16

Gill, J. Bernard, David C. Goodall e Brian Jeffreys. "Reactions in mixed non-aqueous solutions containing sulphur dioxide. Part 8. Phase studies of sulphur dioxide–dimethyl sulphoxide and sulphur dioxide–dimethylformamide mixtures". J. Chem. Soc., Dalton Trans., n. 12 (1986): 2603–5. http://dx.doi.org/10.1039/dt9860002603.

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17

Fišera, Miroslav, Květoslava Šustová, Pavel Tvrzník, Helena Velichová, Lenka Fišerová, Eva Lukášková e Stanislav Kráčmar. "REDUCE THE SULPHUR DIOXIDE CONTENT OF WINE BY BIOLOGICAL PROCESS IN RELATION TO THE CONTENT OF POLYPHENOLIC SUBSTANCES". Journal of microbiology, biotechnology and food sciences 11, n. 5 (1 aprile 2022): e5975. http://dx.doi.org/10.55251/jmbfs.5975.

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In recent years, many papers have paid attention to the bioactive compounds, particularly to the antioxidant activity of polyphenolic compounds in food and beverages, due to their positive effect on human body. Therefore, the phenolic compounds and their antioxidant capacity become an important quality parameter, especially in niche markets concerned with health benefits. Wine is an excellent source of various classes of polyphenols. The phenolic compounds are responsible for the sensory characteristics, particularly colour, astringency, bitterness, and aroma, too. Another very important ingredient in the wine is added the sulphur dioxide, which has the role to protect these reductive components of wines. Sulphur dioxide has the effects of antioxidant, antimicrobial and preservative that is mutually merging. However, it is possible to increase the stability of the complex of biologically active substances (BAS), as holders of natural antioxidant capacity. The present contribution brings opportunities rather than full elimination, but a substantial reduction of the content of sulphur dioxide, which protects the wine during the entire technological process of manufacture and treatment. The dosage of sulphur dioxide can be reduced in its values from 15 to 40% of the total health of the authorized maximum sulphur dioxide content of wine.

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18

PADMANABHAMURTY, B., e RN GUPTA. "Estimation of long term concentrations of SO2 from Mathura refinery with Gaussian diffusion model". MAUSAM 37, n. 3 (1 luglio 1986): 347–52. http://dx.doi.org/10.54302/mausam.v37i3.2453.

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The ground level long term concentrations (ug/m3) to obtain spatial distribution of sulphur dioxide around the Mathura refinery have been computed for all four seasons using steady state Gaussian diffusion model valid for point sources. The monitored data of sulphur dioxide at four points in different sectors at different distances collected prior to and after the commissioning of the refinery have also been utilised. It is seen that there is no significant increase in sulphur dioxide concentration after commissioning of the refinery and the model also confirms that the long term concentrations due to refinery are insignificant at the monitoring stations.

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19

Rakitskaya, Tatyana L., Tatyana A. Kiose, E. V. Kameneva e V. Ya Volkova. "Natural Clinoptilolite Based Solid-State Compositions for Low-Temperature Air Purification from Sulphur Dioxide". Solid State Phenomena 230 (giugno 2015): 291–96. http://dx.doi.org/10.4028/www.scientific.net/ssp.230.291.

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Natural clinoptilolite (N-CLI) and N-CLI based solid-state compositions containing copper(II) chloride and halide ions (X- = Cl-, Br- or I-) were investigated by X‑ray diffraction phase analysis, IR spectroscopy, thermogravimetry, water vapour adsorption, and pH‑metry. After that, they were tested in the reaction of low-temperature sulphur dioxide oxidation with air oxygen. It has been found that N-CLI has no protective properties in respect of sulphur dioxide whereas CuCl2‑KX/N-CLI compositions have the significant protective activity in the process of air purification from sulphur dioxide increasing in the order Cl- < Br- < I-.

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20

Marcewicz-Kuba, Agnieszka. "Effect of the synthetic zeolite modification on its physicochemical and catalytic properties in the preparation of the catalysts effectively removing sulphur dioxide from exhaust gases". Polish Journal of Chemical Technology 18, n. 2 (1 giugno 2016): 40–45. http://dx.doi.org/10.1515/pjct-2016-0027.

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Abstract This work presents the research results of the influence of modification deSONOx type catalyst of the sulfur dioxide emissions in the process of the hard coal combustion. The addition of zeolite catalysts modified by transition metal ions: V, Mg, activated by zinc sorbent with or without graphite addition caused the deeper burning of coal grains. The addition of the deSOx catalysts to the coal resulted in lowered sulphur dioxide emission. The addition of unmodified zeolite to coal during combustion reduced sulphur dioxide emission at about 5%. The modification of the support by both V and Mg reduced the amount of sulphur dioxide significantly. The obtained results of SO2 removal from exhaust gases were from 34.5% for Sip/Mg to 68.3% for Sip/V.

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Durmisevic, Smajil, e Jasminka Durmisevic-Serdarevic. "Ambient air quality and the frequency of physician visits by preschool children". Medical review 60, n. 7-8 (2007): 387–90. http://dx.doi.org/10.2298/mpns0708387d.

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Introduction. Ambient air pollution in the town of Kakanj, mostly of industrial origin, has become a major reason for increased use of health care services by children under the age of six years. The aim of this study was to examine the correlation between ambient concentrations of sulphur dioxide (SO2), suspended particles and nitrogenoxides (NOx), and the frequency/number of visits to health care institutions by children under the age of six years. Material and methods. The investigation was carried out in the period from January to December 2003, in the area of Kakanj and Brnjic. We examined the average number of monthly visits to health care institutions and concentrations of sulphur dioxide, suspended particles and nitrogen oxides in the town of Kakanj. Results. The investigation shows that there is a linear increase of visits to health care institutions in relation to linear increase of concetrations of sulphur dioxide, suspended particles and nitrogen oxides (O<R<+1). An increase in visits to health care institutions significantly correlates (0.05) with the average concetrations of sulphur dioxide (0.713) and suspended particles (0.433), and with the average concentrations of nitrogen oxides (0.901). Discussion. High correlation between the increase in visits to health care institutions and increased concentrations of nitrogen oxides and sulphur dioxide was also found by Berktas, Jazbec, Transande. Conclusion. Children under the age of six in the town of Kakanj visit health care institutions considerably more frequently than children of the same age in the village of Brnjic, which significantly correlates with the average monthly concentrations of sulphur dioxide, suspended particles and nitrogen oxides in the air. .

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ROBINSON, P. H., e J. J. KENNELLY. "AMMONIA OR SULPHUR DIOXIDE TREATMENT OF HIGH-MOISTURE BARLEY ON IN SITU RUMEN DEGRADABILITY AND IN SITU WHOLE-TRACT DIGESTIBILITY". Canadian Journal of Animal Science 68, n. 3 (1 settembre 1988): 779–86. http://dx.doi.org/10.4141/cjas88-087.

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High-moisture barley (HMB) was ensiled in polyethylene silage bags. Treatments applied to 30% moisture HMB as a percentage of dry matter (DM) were: none, 1% ammonia, 2% ammonia, and 1.5% sulphur dioxide. A fifth treatment was the addition of 1.5% sulphur dioxide to 20% moisture HMB. Barley samples were ruminally incubated to estimate degradability of DM and nitrogen (N). Ruminally incubated bags were also introduced to the duodenal cannulae and collected in feces to estimate true whole-tract digestion. Sulphur dioxide treatment, or moisture content, had no influence on ruminal degradability, with the exception of increased degradation rate of potentially degradable N for 20 vs 30% HMB, or whole-tract true digestion. Ammoniation resulted in net reduction in rate of ruminal DM release due to shift of soluble DM to the potentially degradable fraction, and decrease in the potentially degradable fraction degradation rate. Ammoniation increased barley N content up to 44% with no change in rate of ruminal N release. Whole-tract true DM digestion was higher for ammoniated barley but N digestion was not influenced. Sulphur dioxide appears to offer no advantages beyond grain preservation, whereas ammoniation offers potential by reducting rate of ruminal DM release, and providing a source of slow release nonprotein N, without affecting post-ruminal digestibility. Key words: High-moisture barley, ammonia, sulphur dioxide

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Szyszkowicz, Mieczyslaw, e Eugeniusz Porada. "Ambient Sulphur Dioxide and Female ED Visits for Migraine". ISRN Neurology 2012 (15 marzo 2012): 1–5. http://dx.doi.org/10.5402/2012/279051.

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Ambient sulphur dioxide (SO2) concentrations may affect the number of female emergency department (ED) visits for migraine. ED visits diagnosed as migraine among females in two cities in Canada, Toronto (N=704) and Ottawa (N=3,358), were analyzed. In the study case-crossover design was used. Conditional logistic regression was realized to estimate odds ratios (ORs) and their 95% confidence intervals (CIs) relative to an increase in an interquartile range (IQR, in Toronto IQR=2.9 ppb, in Ottawa IQR=3.9 ppb) of sulphur dioxide. In the constructed conditional logistic regression models, temperature and relative humidity were adjusted in the form of natural splines. In Toronto positive and statistically significant associations of sulphur dioxide with migraine ED visits were obtained: all ages, OR=1.04 (95% CI: 1.00, 1.08); age group [15, 50], OR=1.05 (95% CI: 1.01, 1.09). In Ottawa positive correlations were observed: all ages, OR=1.05 (95% CI: 0.97, 1.13); age group [15, 50], OR=1.06 (95% CI: 0.97, 1.15). The results suggest that female migraine may be affected by ambient sulphur dioxide.

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Kane, Amadou, Issa Samb, Cheikh Ahmed Tidiane Ndiaye, Silver Boucar Diouf, Saloly Ndiaye, Seydina Cheikhou Omar Ly e Mohamed Lamine Gaye. "Determination of the Sulfur Content of Gasoline from Four Major Fuel Distributors in Dakar". Asian Journal of Physical and Chemical Sciences 12, n. 3 (15 giugno 2024): 1–9. http://dx.doi.org/10.9734/ajopacs/2024/v12i3226.

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Sulfur dioxide is an acidifying gaseous pollutant. It contributes to the acidification of the environment. When emitted into the air and in the presence of water, sulfur dioxide forms sulfuric acid, which contributes to the phenomenon of acid rain. Acidifying substances disrupt the composition of air, surface water and soil. Sulphur dioxide (SOx) emissions are closely linked to the use of fuels containing sulphur, and the maximum permitted sulphur content is one of the most closely monitored fuel parameters. In this article, we determined the sulfur content of gasoline samples taken from four service stations belonging to the most representative groups in terms of light petroleum product distribution in Senegal. The aim is to assess the environmental impact of sulfur dioxide emissions resulting from the use of gasoline by vehicles, and to reduce upstream sulfur content.

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Seaward, M. R. D. "Lichens and sulphur dioxide air pollution: field studies". Environmental Reviews 1, n. 2 (1 luglio 1993): 73–91. http://dx.doi.org/10.1139/a93-007.

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The recent spread of air pollution, particularly sulphur dioxide, throughout Europe and elsewhere over the past 200 years is accurately reflected by the decline of lichens. Lichens have proved highly versatile for monitoring not only increasing but also decreasing levels of air pollution in general and, more recently, qualitative differences brought about by changes in energy policies, clean air legislation, and agricultural practices. The use of lichens as biological monitors of sulphur dioxide pollution over the past 150 years is reviewed, and techniques such as zonal mapping, pollution indexes, monitoring scales, and modelling are covered to demonstrate their effectiveness in air quality surveillance, often over wide geographical areas, where physicochemical equipment is often inadequate or indeed nonexistent.Key words: lichens, air pollution, sulphur dioxide, field studies.

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Machado de Oliveira, Camila, Adilson Oliveira, Jeane Almeida do Rosário, Agenor de Noni Jr. e Michael Peterson. "Purification Route of Pyrite from Coal Mining". Materials Science Forum 869 (agosto 2016): 155–58. http://dx.doi.org/10.4028/www.scientific.net/msf.869.155.

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Pyrite, mineral largely found in nature, is considered a solid waste when is obtained from the coal mining. However, can be precursor of products like: sulphur, sulphuric acid, hematite, sulphur dioxide, fertilizers and iron sulfates. Several studies also point it property of semiconduction and it use in solar cells. Increase it purity level is important for transforming it in products with more aggregate value. Thus, the present work suggests a purification route for the reduction in soluble salts in water, organics and quartz associated with pyrite from the coal mining beneficiation. The used methods were solubilization in hot water and in organic solvent (dichloromethane). Were applied XRD, FTIR, total sulphur determination, and gas helium picnometry. Comparing the results obtained for the “in nature” pyrite with the purified one, proved the efficiency of the proposed method.

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Hansmann, C. F., e P. C. Fourie. "DEHYDRATION OF APRICOTS WITHOUT SULPHUR DIOXIDE". Acta Horticulturae, n. 488 (maggio 1999): 585–92. http://dx.doi.org/10.17660/actahortic.1999.488.95.

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DVOŘÁK, Josef, Pavel DOSTÁLEK, Karel ŠTĚRBA, Pavel ČEJKA, Vladimír KELLNER, Jiří ČULÍK, Tomáš HORÁK e Marie JURKOVÁ. "Significance of sulphur dioxide in beer." Kvasny Prumysl 52, n. 11-12 (1 novembre 2006): 346–48. http://dx.doi.org/10.18832/kp2006028.

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Selvapathy, P., T. V. Ramakrishna, N. Balasubramanian e R. Pitchai. "Extraction-spectrophotometric determination of sulphur dioxide". Analyst 112, n. 8 (1987): 1139. http://dx.doi.org/10.1039/an9871201139.

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Balasubramanian, N., e B. S. M. Kumar. "Extraction–spectrophotometric determination of sulphur dioxide". Analyst 116, n. 2 (1991): 207–11. http://dx.doi.org/10.1039/an9911600207.

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Usseglio‐Tomasset, L. "Properties and use of sulphur dioxide". Food Additives and Contaminants 9, n. 5 (settembre 1992): 399–404. http://dx.doi.org/10.1080/02652039209374090.

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Wolfbeis, Otto S., e Ashutosh Sharma. "Fibre-optic fluorosensor for sulphur dioxide". Analytica Chimica Acta 208 (1988): 53–58. http://dx.doi.org/10.1016/s0003-2670(00)80735-7.

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WEDZICHA, B., e D. ADAMU. "Reactivity of vegetables towards sulphur dioxide". Food Chemistry 26, n. 3 (1987): 159–73. http://dx.doi.org/10.1016/0308-8146(87)90032-x.

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Copestake, Philip. "Sulphur dioxide, acid aerosols and particulates". Food and Chemical Toxicology 31, n. 4 (aprile 1993): 317–18. http://dx.doi.org/10.1016/0278-6915(93)90085-d.

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NORDENSON, I., G. BECKMAN, L. BECKMAN, L. ROSENHALL e N. STJERNBERG. "Is exposure to sulphur dioxide clastogenic?" Hereditas 93, n. 1 (12 febbraio 2009): 161–64. http://dx.doi.org/10.1111/j.1601-5223.1980.tb01056.x.

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Hansmann, C. F., Elizabeth Joubert e T. J. Britz. "DEHYDRATION OF PEACHES WITHOUT SULPHUR DIOXIDE". Drying Technology 16, n. 1-2 (gennaio 1998): 101–21. http://dx.doi.org/10.1080/07373939808917394.

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37

Hansmann, C. F. "DEHYDRATION OF PEARS WITHOUT SULPHUR DIOXIDE". Drying Technology 16, n. 8 (gennaio 1998): 1665–85. http://dx.doi.org/10.1080/07373939808917485.

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38

Edwards, C. J., F. Lyth Hudson e J. A. Hockey. "Sorption of sulphur dioxide by paper". Journal of Applied Chemistry 18, n. 5 (4 maggio 2007): 146–48. http://dx.doi.org/10.1002/jctb.5010180506.

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39

Kotb, A. K. "Adsorption of sulphur dioxide on coal". Journal of Applied Chemistry 20, n. 5 (4 maggio 2007): 147–52. http://dx.doi.org/10.1002/jctb.5010200502.

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40

Roslyakov, P. V., e O. E. Kondratieva. "Technical possibilities of ash and sulphur oxides emission reduction at Russian coal-fired thermal power plants". IOP Conference Series: Earth and Environmental Science 1061, n. 1 (1 luglio 2022): 012035. http://dx.doi.org/10.1088/1755-1315/1061/1/012035.

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Abstract (sommario):

Abstract The issues of the introduction of the best available technologies (BAT) at Russian coal-fired thermal power plants in accordance with the recommendations of the current information and technical handbook ITS 38-2017 are considered. It is shown that the technological indicators of ITS 38-2017 on emissions of solid fuel ash and sulphur dioxide do not solve the problem of reducing the negative impact on the environment. The analysis of the properties of burnt coals and available technologies for sulphur dioxides and ash cleaning of flue gases was carried out in order to determine new technological indicators for emissions of solid fuel ash and sulphur dioxide and the best available technologies for updating ITS 38-2017. The analysis of existing technologies for ash cleaning and desulphurization of gases was carried out and recommendations were given for areas of their effective application to meet different quantitative levels of technological indicators of emissions. New technological emission indicators for updating ITS 38 are proposed and justified. Recommendations are given to expand the list of the best available technologies recommended for implementation at Russian thermal power plants.

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41

Kicińska, Bożena. "Dependence of Air Quality Conditions in Cities in North-Western Poland on the Direction of Air Inflow". Miscellanea Geographica 12, n. 1 (1 dicembre 2006): 81–86. http://dx.doi.org/10.2478/mgrsd-2006-0009.

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Abstract This paper presents the dependence of air pollution with sulphur dioxide and nitrogen dioxide on wind direction in Szczecin, Łeba, Elbląg and Zielona Góra in the period 1993-1999. It has been shown that the most disadvantageous air quality conditions in the cities listed above are on the days with air inflow from south-east, and the most advantageous on the days with advection from north-west. This dependence is particularly evident in the case of pollution with sulphur dioxide, especially in the cold half-year.

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42

Stražanac, Danijela, Darja Sokolić, Sandra Bašić, Brigita Hengl e Andrea Gross-Bošković. "Konzerviranje rakova upotrebom sumpornog dioksida i sulfita (E 220 – E 228)". Meso 21, n. 3 (2019): 269–78. http://dx.doi.org/10.31727/m.21.3.5.

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Food additives are substances of known chemical composition that are neither consumed as food nor typical food ingredients, regardless of their nutritional value, but are instead added to foodstuffs to perform certain technological functions and retain certain sensory properties of food. Additives that are widely applied in food industry include sulphur dioxide (SO2) and sulphites (E 220 – E 228). Sulphur dioxide and its derivatives are added to foodstuffs in order to inhibit and control the growth of microorganisms, for the purpose of prevention of non-enzymatic browning and inhibition of enzyme-catalysed reactions, as well as antioxidants and reducing agents.Food to which they are most often added includes various dried fruits, certain species of crabs and molluscs, fruit juices, beer, wine and other products. Since harmful effects of sulphur dioxide and sulphites are most commonly associated with allergic reactions to food, it is, therefore, necessary to inform consumers of their presence in food, even when they are present in very small quantities, because their quantity itself does not exclude the possibility of an allergic reaction. The use of sulphur dioxide and sulphites in the processing of crabs (scampi, shrimp, and lobster) is justified by their preservative effect on slowing the growth of bacteria and preventing the formation of melanomas that manifest by the emergence of black spots on crab shell caused by the polyphenol oxidase enzyme activity. Sulphur dioxide and sulphites are regulated by Regulation (EC) No. 1333/2008 of the European Parliament and of the Council of 16 December 2008 on food additives as amended by Commission Regulation (EU) No. 1129/2011 amending Annex II to Regulation (EC) No 1333/2008 of the European Parliament and of the Council by establishing a Union list of food additives. In 1993, the International Agency for Research on Cancer (IARC) classified sulphur dioxide and sulphites as Group 3, meaning they are not classifiable as to their carcinogenicity to humans. The European Food Safety Authority (EFSA) has, in its Scientific Opinion on the re-evaluation of sulphur dioxide (E 220), sodium sulphite (E 221), sodium bisulphite (E 222), sodium metabisulphite (E 223), potassium metabisulphite (E 224), calcium sulphite (E 226), calcium bisulphite (E 227) and potassium bisulphite (E 228) as food additives, confirmed that the current acceptable daily intake (ADI) of 0.7 mg SO2 equivalent/kg of body weight per day would remain adequate.

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43

Zaker, Mohammad Reza, Clémence Fauteux-Lefebvre e Jules Thibault. "Modelling and Multi-Objective Optimization of the Sulphur Dioxide Oxidation Process". Processes 9, n. 6 (20 giugno 2021): 1072. http://dx.doi.org/10.3390/pr9061072.

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Sulphuric acid (H2SO4) is one of the most produced chemicals in the world. The critical step of the sulphuric acid production is the oxidation of sulphur dioxide (SO2) to sulphur trioxide (SO3) which takes place in a multi catalytic bed reactor. In this study, a representative kinetic rate equation was rigorously selected to develop a mathematical model to perform the multi-objective optimization (MOO) of the reactor. The objectives of the MOO were the SO2 conversion, SO3 productivity, and catalyst weight, whereas the decisions variables were the inlet temperature and the length of each catalytic bed. MOO studies were performed for various design scenarios involving a variable number of catalytic beds and different reactor configurations. The MOO process was mainly comprised of two steps: (1) the determination of Pareto domain via the determination a large number of non-dominated solutions, and (2) the ranking of the Pareto-optimal solutions based on preferences of a decision maker. Results show that a reactor comprised of four catalytic beds with an intermediate absorption column provides higher SO2 conversion, marginally superior to four catalytic beds without an intermediate SO3 absorption column. Both scenarios are close to the ideal optimum, where the reactor temperature would be adjusted to always be at the maximum reaction rate. Results clearly highlight the compromise existing between conversion, productivity and catalyst weight.

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44

Onianwa, P. C., e A. O. Babajide. "Sulphate-sulphur levels of topsoils related to atmospheric sulphur dioxide pollution". Environmental Monitoring and Assessment 25, n. 2 (aprile 1993): 141–48. http://dx.doi.org/10.1007/bf00549135.

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45

Gupta, B. L., e B. Suseela. "Mechanism for the radiolytic conversion of sulphur dioxide to sulphuric acid". International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry 27, n. 2 (1986): 75–78. http://dx.doi.org/10.1016/1359-0197(86)90136-0.

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46

Fahad, Majid Jasim, e Asaad Kadhim Abdullah. "The Relationship Between Sulphur Dioxide and Trehalose and Their Effect on Some Biochemical Characteristics of Tomato Plants". Asian Journal of Water, Environment and Pollution 19, n. 4 (26 luglio 2022): 81–90. http://dx.doi.org/10.3233/ajw220059.

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Sulphur oxide is one of the most serious problems of air pollution on the environment, especially human and plant health. This study was conducted to clarify the effect of sulphur dioxide (SO2) stress on some of the biochemical characteristics of tomato plant, Lycopersicum esculentum Mill. The plants were exposed to three doses of SO2 (0, 5, 10 mg.m-3), the exposure period was inclusive to 1 and 2 hours for each day. In order to reduce the toxicity of sulphur dioxide, the plants were treated by spraying them with trehalose sugar at concentrations of 0,50 and 100 mg.L-1. The results of the experiment showed that increasing the concentration of SO2 as well as increasing its exposure led to an increase in the activity of enzyme antioxidants (superoxide dismutase, SOD; peroxidase, POD; catalase CAT) and non-enzymatic antioxidants (Proline, Vitamin C, Lycopene), while the antioxidant activities decreased when spraying trehalose, especially at concentration 100 mg.L-1. It also recorded a positive effect in mitigating the negative effects of sulphur dioxide stress.

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47

Grace, B., T. J. Gillespie e K. J. Puckett. "Sulphur dioxide threshold concentration values for Cladina rangiferina in the Mackenzie Valley, N.W.T." Canadian Journal of Botany 63, n. 4 (1 aprile 1985): 806–12. http://dx.doi.org/10.1139/b85-103.

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A simulation model for the prediction of threshold concentration values of gaseous sulphur dioxide for damage to Cladina rangiferina over a 24-h period is presented. The model requires inputs of near surface relative humidities and air temperatures as well as lichen surface temperatures, and nearby airport wind speeds. An initial value of percent lichen water content must also be specified. Studies of lichen water relationships provided expressions utilized in the model for the calculation of the percent lichen water content. The model was applied to four microclimatically different days for an open lichen–spruce woodland near Inuvik, N.W.T. Boundary-layer resistance was found to be not as important as internal thallus resistance to sulphur dioxide uptake. For all days examined, threshold gaseous concentration values of sulphur dioxide for a 24-h period ranged from 20 to 30 μg∙m−3.

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48

Nurandani, Hardyanti, Utomo Sudarno, Oktaviana Angelica, Serafina Katrin e Junaidi Junaidi. "Effect of COD/SO42- Supply Ratio Variations of Sulfate-Reducing Bacteria of Sulphood Raise in Acid Mine Drainage". E3S Web of Conferences 73 (2018): 05009. http://dx.doi.org/10.1051/e3sconf/20187305009.

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Abstract (sommario):

Sulphur dioxide gas is one of most contaminating gas in the air. Sulphur gas can be produced by mining activities. Sulphur gas will be harmful if bond with CO2 to form as Sulphur Dioxide. To reduce the Sulphur Dioxide gas concentration we must inhibite the sulphur gas formation from mining activities. The inhibition of sulphur gas could be done by reduce the sulphate concentration in acid mine drainage. One of important factor that influencing the reduce of sulphate is COD/SO42- ratio. The effect of COD/SO42- ratio on bacterial growth and sulfate removal process can be investigated with anaerobic batch reactor. The laundry septic tank sediments were inoculated on an anaerobic batch reactor which were contacted with artificial coal acid mine water wastes with 1000 sulfate concentrations and 2000 mg SO42- /L. In an anaerobic batch reactor there are five reactors with variations of COD / SO42-1.0, 1.5, 2.0, 4.0, and 8.0 ratios. Efficiency ratio and the best sulfate removal rate is in reactor ratio 2.0 with value efficiency of 46.58% and a reduction rate of 29.128 mg / L.day in an anaerobic batch reactor. The efficiency of the removal rate decreased when the COD / SO42->2.0 ratio decreased. The fastest pH decline was in the COD/SO42-8.0 ratio variation in the anaerobic batch reactor and. The COD / SO42-ratio can help the sulfate reduction process in the optimum value by affecting the sulfate-reducing bacterial metabolism in the balance of the acceptor and the electron donor.

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49

Sandhu, Ravinder, Yuncong Li e Gian Gupta. "Sulphur dioxide and carbon dioxide induced changes in soybean physiology". Plant Science 83, n. 1 (gennaio 1992): 31–34. http://dx.doi.org/10.1016/0168-9452(92)90059-u.

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50

Salvitti, Chiara, Federico Pepi, Anna Troiani, Marzio Rosi e Giulia de Petris. "The Peroxymonocarbonate Anion HCO4− as an Effective Oxidant in the Gas Phase: A Mass Spectrometric and Theoretical Study on the Reaction with SO2". Molecules 28, n. 1 (23 dicembre 2022): 132. http://dx.doi.org/10.3390/molecules28010132.

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The peroxymonocarbonate anion, HCO4−, the covalent adduct between the carbon dioxide and hydrogen peroxide anion, effectively reacts with SO2 in the gas phase following three oxidative routes. Mass spectrometric and electronic structure calculations show that sulphur dioxide is oxidised through a common intermediate to the hydrogen sulphate anion, sulphur trioxide, and sulphur trioxide anion as primary products through formal HO2−, oxygen atom, and oxygen ion transfers. The hydrogen sulphite anion is also formed as a secondary product from the oxygen atom transfer path. The uncommon nucleophilic behaviour of HCO4− is disclosed by the Lewis acidic properties of SO2, an amphiphilic molecule that forms intermediates with characteristic and diagnostic geometries with peroxymonocarbonate.

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