Correction

Soil Research ◽  
1993 ◽  
Vol 31 (3) ◽  
pp. 391
Author(s):  
JH Watkinson
Keyword(s):  
Oxidation Rate ◽  
Elemental Sulfur ◽  
Wide Range

Oxidation Rate of Elemental Sulfur Particles With a Wide-Range of Sizes (Vol 31, Pg 68, 1993)

Oxidation rate of elemental sulfur particles with a wide range of sizes

Soil Research ◽  
1993 ◽  
Vol 31 (1) ◽  
pp. 67
Author(s):  
JH Watkinson
Keyword(s):  
Rate Constant ◽  
Oxidation Rate ◽  
Total Mass ◽  
Elemental Sulfur ◽  
Sieve Analysis ◽  
Oxidation Rate Constant ◽  
Sieve Fraction ◽  
Wide Range ◽  
The Mean ◽  
Lower Size

An equation is proposed that describes the oxidation rate of elemental sulfur particles with a wide range of sizes, such as would be found in fertilizers. The only information needed is the mean oxidation rate constant over the period of interest and, from a sieve analysis, the proportions of the total mass in each sieve fraction (ratio of upper to lower size < to 2).

Corrigenda - Oxidation rate of elemental sulfur particles with a wide range of sizes

Soil Research ◽  
1993 ◽  
Vol 31 (1) ◽  
pp. 67
Author(s):  
JH Watkinson
Keyword(s):  
Rate Constant ◽  
Oxidation Rate ◽  
Total Mass ◽  
Elemental Sulfur ◽  
Sieve Analysis ◽  
Oxidation Rate Constant ◽  
Sieve Fraction ◽  
Wide Range ◽  
The Mean ◽  
Lower Size

An equation is proposed that describes the oxidation rate of elemental sulfur particles with a wide range of sizes, such as would be found in fertilizers. The only information needed is the mean oxidation rate constant over the period of interest and, from a sieve analysis, the proportions of the total mass in each sieve fraction (ratio of upper to lower size < to 2).

Final products and kinetics of biochemical and chemical sulfide oxidation under microaerobic conditions

2018 ◽  
Vol 78 (9) ◽  
pp. 1916-1924 ◽  
Author(s):  
Lucie Pokorna-Krayzelova ◽  
Dana Vejmelková ◽  
Lara Selan ◽  
Pavel Jenicek ◽  
Eveline I. P. Volcke ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Oxidation Rate ◽  
Elemental Sulfur ◽  
Sulfide Oxidation ◽  
Cost Effective ◽  
Anaerobic Treatment ◽  
Batch Experiments ◽  
Cost Effective Method ◽  
Microaerobic Conditions ◽  
Kinetics Of

Abstract Hydrogen sulfide is a toxic and usually undesirable by-product of the anaerobic treatment of sulfate-containing wastewater. It can be removed through microaeration, a simple and cost-effective method involving the application of oxygen-limiting conditions (i.e., dissolved oxygen below 0.1 mg L−1). However, the exact transformation pathways of sulfide under microaerobic conditions are still unclear. In this paper, batch experiments were performed to study biochemical and chemical sulfide oxidation under microaerobic conditions. The biochemical experiments were conducted using a strain of Sulfuricurvum kujiense. Under microaerobic conditions, the biochemical sulfide oxidation rate (in mg S L−1 d−1) was approximately 2.5 times faster than the chemical sulfide oxidation rate. Elemental sulfur was the major end-product of both biochemical and chemical sulfide oxidation. During biochemical sulfide oxidation elemental sulfur was in the form of white flakes, while during chemical sulfide oxidation elemental sulfur created a white suspension. Moreover, a mathematical model describing biochemical and chemical sulfide oxidation was developed and calibrated by the experimental results.

scholarly journals A novel three-component reaction between isocyanides, alcohols or thiols and elemental sulfur: a mild, catalyst-free approach towards O-thiocarbamates and dithiocarbamates

2019 ◽  
Vol 15 ◽  
pp. 1523-1533 ◽  
Author(s):  
András György Németh ◽  
György Miklós Keserű ◽  
Péter Ábrányi-Balogh
Keyword(s):  
Elemental Sulfur ◽  
Building Blocks ◽  
Reaction Conditions ◽  
One Pot ◽  
Catalyst Free ◽  
Synthetic Procedure ◽  
Three Component Reaction ◽  
Wide Range ◽  
Organic Chemist ◽  
The One

A new multicomponent reaction has been developed between isocyanides, sulfur and alcohols or thiols under mild reaction conditions to afford O-thiocarbamates and dithiocarbamates in moderate to good yields. The one-pot reaction cascade involves the formation of an isothiocyanate intermediate, thus a catalyst-free synthesis of isothiocyanates, as valuable building blocks from isocyanides and sulfur is proposed, as well. The synthetic procedure suits the demand of a modern organic chemist, as it tolerates a wide range of functional groups, it is atom economic and easily scalable.

ELEMENTAL SULFUR OXIDATION AS INFLUENCED BY PLANT GROWTH AND DEGREE OF DISPERSION WITHIN SOIL

1990 ◽  
Vol 70 (3) ◽  
pp. 499-502 ◽  
Author(s):  
H. H. JANZEN
Keyword(s):  
Plant Growth ◽  
Key Words ◽  
Oxidation Rate ◽  
Elemental Sulfur ◽  
Sulfur Oxidation ◽  
Particle Dispersion ◽  
Controlled Environment ◽  
Oxidation Rates ◽  
S Oxidation ◽  
Elemental Sulfur Oxidation

Controlled environment studies were conducted to characterize the effects of cropping treatment and degree of particle dispersion on S oxidation rate. In two soils (a Chernozem and a Luvisol), S oxidation rates were not greatly affected by cropping treatment (barley, beans, canola, or fallow). In a second experiment, S oxidation was shown to approach maximum rates at a dispersion level of 1000 g soil g−1 S. Key words: Sulfur, placement, rhizosphere, fertilizer, elementals

SULFUR ISOTOPE FRACTIONATION DURING THE OXIDATION OF ELEMENTAL SULFUR BY THIOBACILLI IN A SOLONETZIC SOIL

1982 ◽  
Vol 62 (1) ◽  
pp. 105-110 ◽  
Author(s):  
R. G. L. McCREADY ◽  
H. R. KROUSE
Keyword(s):  
Soil Profile ◽  
Oxidation Rate ◽  
Isotope Fractionation ◽  
Sulfur Isotope ◽  
Elemental Sulfur ◽  
Isotopic Analysis ◽  
Thiobacillus Thioparus ◽  
Sulfur Isotope Fractionation ◽  
Solonetzic Soil ◽  
S Oxidation

The oxidation rate of elemental S added to a Solonetzic soil was compared between an uninoculated soil and soils inoculated with two species of thiobacilli. Twelve weeks after S was added, 24% was oxidized to soluble S anions in the uninoculated soil, 34% in soil inoculated with Thiobacillus thiooxidans, and 84% in soil inoculated with Thiobacillus thioparus. The SO42− produced during S oxidation by thiobacilli was enriched in the lighter isotope by an average of 1‰ in comparison with the substrate S. Therefore, 34S-enriched S could be applied to Solonetzic soils and the migration of biologically produced H2SO4 into the soil profile may be followed by isotopic analysis of the soil sulfate.

scholarly journals One-step vapor-phase synthesis of transparent high refractive index sulfur-containing polymers

2020 ◽  
Vol 6 (28) ◽  
pp. eabb5320 ◽  
Author(s):  
Do Heung Kim ◽  
Wontae Jang ◽  
Keonwoo Choi ◽  
Ji Sung Choi ◽  
Jeffrey Pyun ◽  
...  
Keyword(s):  
Refractive Index ◽  
Vapor Phase ◽  
Elemental Sulfur ◽  
Chemical Vapor ◽  
Deposition Process ◽  
High Refractive Index ◽  
Visible Range ◽  
Wide Range ◽  
One Step ◽  
Vapor Phase Synthesis

High refractive index polymers (HRIPs) have recently emerged as an important class of materials for use in a variety of optoelectronic devices including image sensors, lithography, and light-emitting diodes. However, achieving polymers having refractive index exceeding 1.8 while maintaining full transparency in the visible range still remains formidably challenging. Here, we present a unique one-step vapor-phase process, termed sulfur chemical vapor deposition, to generate highly stable, ultrahigh refractive index (n > 1.9) polymers directly from elemental sulfur. The deposition process involved vapor-phase radical polymerization between elemental sulfur and vinyl monomers to provide polymer films with controlled thickness and sulfur content, along with the refractive index as high as 1.91. Notably, the HRIP thin film showed unprecedented optical transparency throughout the visible range, attributed to the absence of long polysulfide segments within the polymer, which will serve as a key component in a wide range of optical devices.

EXTRACTION AND COLORIMETRIC DETERMINATION OF ELEMENTAL SULFUR IN ORGANIC HORIZONS OF FOREST SOILS

1985 ◽  
Vol 65 (4) ◽  
pp. 811-813 ◽  
Author(s):  
D. G. MAYNARD ◽  
P. A. ADDISON
Keyword(s):  
Forest Soils ◽  
Elemental Sulfur ◽  
Soil Analysis ◽  
Colorimetric Method ◽  
Forest Litter ◽  
Colorimetric Determination ◽  
Wide Range ◽  
Organic Horizons ◽  
Specialized Equipment ◽  
High Degree

A method is proposed for determining elemental S (S°) in organic horizons of forest soils. Elemental sulfur is extracted from the soil with acetone and assayed by a colorimetric method. The procedure is a modification of several existing methods and allows for the extraction of all forms of S°. It also reduces the interference of colored extracts from forest litter. The detection limit is 100 mg∙kg−1 (1 mg S°∙mL−1 of solution) and S° concentrations in excess of 50 000 mg∙kg−1 have been measured. The recovery of S° is approximately 90%. The method is suitable for determining S° in organic forest soils with a wide range of S° concentrations and where a high degree of accuracy and precision is not required. It is rapid and suitable for routine analysis in laboratories without specialized equipment. Key words: Elemental sulfur, forest soil analysis, organic horizon

Effect of Acid Gas (H2S and CO2) Addition in Hydrogen/Air Flames

2013 ◽  
Author(s):  
Hatem Selim ◽  
Salisu Ibrahim ◽  
Ahmed S. AlShoaibi ◽  
Ashwani K. Gupta
Keyword(s):  
Carbon Monoxide ◽  
Elemental Sulfur ◽  
Hydrogen Oxidation ◽  
The Other ◽  
Claus Process ◽  
Acid Gas ◽  
Actual Operating ◽  
Wide Range ◽  
Co2 Addition ◽  
Lean Conditions

Results on the effect of acid gas (H2S and CO2) addition in hydrogen/air flame are reported. Different equivalence ratios examined ranged from fuel-rich conditions (Φ = 3.0), stoichiometric conditions (Φ = 1.0), and fuel-lean conditions (Φ = 0.5) to represent the range of conditions that may exist in actual operating Claus furnaces. Acid gas compositions examined are 100% H2S gas and 50% H2S/50% CO2 mixtures to represent a wide range of acid gas compositions encountered during processing of acid gases. Addition of 100% H2S gas in hydrogen/air flame degraded the rate of hydrogen oxidation. In addition, hydrogen sulfide combustion formed sulfur dioxide rather than more favorable elemental sulfur. On the other hand decomposition/production of H2S, SO2, and H2 was observed to occur faster in 50% H2S/50% CO2 acid gas stream. Presence of carbon monoxide was a distinct mark on the release of oxygen from CO2 into the reaction pool. The presence of carbon monoxide also triggered the formation of other sulfurous-carbonaceous compounds, such as COS and CS2. The formation of these compounds adversely impacts the Claus process performance. The results provide conditions under which such compounds are formed and also reveal conditions to alleviate them.

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