Spot Test Reaction for the Detection of Elemental Sulfur

1956 ◽  
Vol 29 (3) ◽  
pp. 1117-1118 ◽  
Author(s):  
Fritz Feigl ◽  
Cecile Stark
Keyword(s):  
Hydrogen Sulfide ◽  
Lead Acetate ◽  
Elemental Sulfur ◽  
Test Tube ◽  
Spot Test ◽  
Sensitive Test ◽  
Test Reaction ◽  
Commercial Products ◽  
Inorganic Substances ◽  
Free Sulfur

Abstract Hydrogen sulfide is formed when free sulfur is heated with fused benzoin. This is the basis of a new and sensitive test for free sulfur in mixtures with organic or inorganic substances. The heating is done in a test-tube, whose mouth carries lead acetate paper. The limit of identification is 0.5µ. Selenium does not interfere. Tests of a wide variety of commercial products gave satisfactory results.

Apparatus for Producing Elemental Sulfur from Highly Concentrated Hydrogen Sulfide-Containing Gases

2020 ◽  
Vol 56 (5-6) ◽  
pp. 465-469
Author(s):  
F. R. Ismagilov ◽  
M. K. Dzheksenov ◽  
A. V. Kurochkin
Keyword(s):  
Hydrogen Sulfide ◽  
Elemental Sulfur

Predicting the solubility of elemental sulfur in hydrogen sulfide through a molecular dynamics approach

2021 ◽  
pp. 139193
Author(s):  
Nong Li ◽  
Liqiang Zhao ◽  
Ying Wan ◽  
Xiaohang Deng ◽  
Xiangyu Huo ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Sulfide ◽  
Elemental Sulfur

scholarly journals Effect of abiotic factors on sulfidogenic activity of bacteria Desulfuromonas sp.

2020 ◽  
Vol 11 (2) ◽  
pp. 170-174
Author(s):  
O. M. Сhaіka ◽  
T. B. Peretyatko
Keyword(s):  
Hydrogen Sulfide ◽  
Cell Density ◽  
Elemental Sulfur ◽  
Abiotic Factors ◽  
Electron Acceptors ◽  
Stress Factors ◽  
Sulfide Concentration ◽  
Sulfur Concentration ◽  
Reducing Bacteria ◽  
Hydrogen Sulfide Concentration

Sulfur-reducing bacteria are promising agents for the development of new methods of wastewater treatment with the removal of ions of heavy metals and organic compounds. Study of the effect of various environmental factors on the growth and sulfidogenic activity of sulfur-reducing bacteria allows one to investigate the adaptability of these microorganisms to stress factors. The paper deals with the effect of рН, different concentrations of elemental sulfur, hydrogen sulfide and presence of various electron acceptors on the growth and sulfidogenic activity of bacteria Desulfuromonas sp. YSDS-3. The calculation of C/S ratio for sulfur-reducing bacteria Desulfuromonas sp. YSDS-3 was made, with the comparison with similar parameters of sulfate-reducing bacteria. In the medium with elemental sulfur, concentration of hydrogen sulfide increased with the concentration of elemental sulfur. Bacteria Desulfuromonas sp. YSDS-3 accumulated their biomass in the most effective way at the concentration of elemental sulfur of 10–100 mM. In the medium with polysulfide form of sulfur at the neutral pH, bacteria produced hydrogen sulfide and accumulated biomass the best. Hydrogen sulfide at the concentration of 3 mM did not inhibit the bacterial growth, but further increase in the hydrogen sulfide concentration inhibited the growth of bacteria. The bacteria did not grow at the hydrogen sulfide concentration of 25 mM and above. As the concentration of elemental sulfur and cell density increases, sulfidogenic activity of the bacteria grows. Presence of two electron acceptors (S and K2Cr2O7, S and MnO2, S and Fe (III)) did not affect the accumulation of biomass of the bacteria Desulfuromonas sp. YSDS-3. However, under such conditions the bacteria accumulated 1.5–2.5 times less hydrogen sulfide than in the test medium. After 12–24 h of cultivation, different concentrations of elemental sulfur had a significant effect on the sulfidogenic activity. However, during 3–16 days of cultivation, the percentage of effect of elemental sulfur concentration decreased to 31%, while the percentage of effect of cell density increased threefold. Presence in the medium of the electron acceptors (Cr (VI), MnO2, Fe (III)) alternative to elemental sulfur led to a significant decrease in the content of hydrogen sulfide produced by sulfur-reducing bacteria.

Selective oxidation of hydrogen sulfide to elemental sulfur using iron oxide catalysts on various supports

1993 ◽  
Vol 17 (1-2) ◽  
pp. 217-224 ◽  
Author(s):  
R.J.A.M. Terörde ◽  
P.J. van den Brink ◽  
L.M. Visser ◽  
A.J. van Dillen ◽  
J.W. Geus
Keyword(s):  
Hydrogen Sulfide ◽  
Iron Oxide ◽  
Selective Oxidation ◽  
Elemental Sulfur ◽  
Oxide Catalysts ◽  
Oxidation Of Hydrogen

Spot Test for Lead in Paint (Continued)

PEDIATRICS ◽  
1971 ◽  
Vol 48 (2) ◽  
pp. 330-330
Author(s):  
James W. Sayre
Keyword(s):  
Hydrogen Sulfide ◽  
Sodium Sulfide ◽  
Spot Test ◽  
Sodium Sulfide Solution ◽  
The Stability ◽  
Sulfide Solution

Questions asked by several people about our sodium sulfide testing of paint for lead1 make us feel we might wisely add several words of caution about the stability of the prepared solution. Sodium sulfide solutions deteriorate fairly rapidly with age, especially on exposure to air. For this reason, it is suggested that people using the procedure check the odor of the sodium sulfide solution tlley are using, to make sure the odor of hydrogen sulfide is detectable.

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