Hydrogen Sulfide Can Be Handled Safely

Poda, G.A.

doi:10.1080/00039896.1966.10664486

Cited by 30 publications

(6 citation statements)

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“…29 Exposure to ≥500 ppm of H 2 S leads to rapid loss of consciousness, cessation of respiration, and death. 30…”

Section: Chemical Properties Of H2smentioning

confidence: 99%

“…The human nose is considered to be one of the most sensitive H 2 S sensors with a detection threshold of 0.02–0.03 ppm. , At 10 ppm, H 2 S leads to eye soreness; 20 ppm is the maximal allowable concentration for a daily 8 h exposure, while exposure to 50 ppm of H 2 S lead to conjunctival and mild respiratory irritation. ,, At 100 ppm, H 2 S leads to olfactory loss within 3–15 min, 150 ppm to olfactory nerve paralysis, ,, and exposure to 300–500 ppm represents an imminent threat to life leading to pulmonary edema . Exposure to ≥500 ppm of H 2 S leads to rapid loss of consciousness, cessation of respiration, and death …”

Section: Chemical Properties Of H2smentioning

confidence: 99%

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Chemical Biology of H₂S Signaling through Persulfidation

et al. 2017

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Signaling by HS is proposed to occur via persulfidation, a posttranslational modification of cysteine residues (RSH) to persulfides (RSSH). Persulfidation provides a framework for understanding the physiological and pharmacological effects of HS. Due to the inherent instability of persulfides, their chemistry is understudied. In this review, we discuss the biologically relevant chemistry of HS and the enzymatic routes for its production and oxidation. We cover the chemical biology of persulfides and the chemical probes for detecting them. We conclude by discussing the roles ascribed to protein persulfidation in cell signaling pathways.

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“…29 Exposure to ≥500 ppm of H 2 S leads to rapid loss of consciousness, cessation of respiration, and death. 30…”

Section: Chemical Properties Of H2smentioning

confidence: 99%

Section: Chemical Properties Of H2smentioning

confidence: 99%

Chemical Biology of H₂S Signaling through Persulfidation

et al. 2017

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“…Some of those gases are extremely toxic and their presence, even in few tens of ppm, is a hazard to human life. Therefore, highly sensitive and selective detection of gases is required to monitor and control environment quality [1].…”

Section: Introductionmentioning

confidence: 99%

Production of sensitive gas sensors using CuO/SnO2 nanoparticles

et al. 2019

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Metal oxide nanoparticles, such as CuO and SnO 2 , are outstanding systems for H 2 S gas sensing in air. In this work, those nanoparticles were deposited with different mixing percentages on substrates to form percolating networks of nanoparticles. Electrical electrodes were deposited on the nanoparticles' films to investigate their gas sensing response against H 2 and H 2 S, and their electrical characteristics. The sensor devices based on CuO-SnO 2 nanoparticles revealed enhanced sensing characteristics against H 2 S with a sensitivity of 10 ppm. The enhanced sensing characteristics could be attributed to the formation of PN-junctions among CuO and SnO 2 nanoparticles. The reasonable production cost (due to simple structure and cheap used materials), low power consumption (~ 1 µW for H 2 S at room temperature), high sensitivity, high response, and reasonable response time of the present sensors qualify them for practical implementation in portable gas sensing devices with enhanced characteristics.

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“…In Table I, we summarize the frequencies of several symptoms recorded in three studies. The symptoms reported by Kleinfeld et al Q were observed in workers after a single accidental release at a chemical plant, whereas the symptoms reported by Poda 7 were for multiple occupational exposures to H2S at facilities producing heavy water. In the study by Burnett et a/., 8 the symptoms were for multiple exposures to sour gases in the oil and gas industry in Alberta, Canada.…”

Section: Health Hazards Of Toxic Gases: Hydrogen Sulfidementioning

confidence: 92%

Predicting and Managing the Health Risks of Sour-Gas Wells

Layton

Cederwall

1987

JAPCA

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The development of sour-gas resources in Canada and the United States has prompted concerns about the public health risks of accidental releases of gas contaminated with hydrogen sulfide (H 2 S) from wells. This paper focuses on methods for improving the prediction and management of those risks. Data associated with the health effects of hydrogen sulfide are examined, and it is suggested that sublethal effects should be addressed in risk assessments of sour-gas wells along with the life-threatening effects normally considered. The demarcation of hazard zones around wells can be improved by using a statistical approach for estimating an upper-bound H 2 S release rate; this rate can then be used in an atmospheric dispersion model to estimate maximum distances to downwind concentrations for lethal (300 ppmv) and sublethal (50 ppmv) effects resulting from an accidental release. A vertical release is found to have little impact, especially under stable atmospheric conditions; horizontal releases, on the other hand, result in the greatest downwind distances for health impacts. Management of health risks depends on a mix of safety technologies and contingency actions, such as well-ignition options and provision for post-release monitoring and assessment of ambient H 2 S concentrations.

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Hydrogen Sulfide Can Be Handled Safely

Cited by 30 publications

References 0 publications

Chemical Biology of H₂S Signaling through Persulfidation

Chemical Biology of H₂S Signaling through Persulfidation

Production of sensitive gas sensors using CuO/SnO2 nanoparticles

Predicting and Managing the Health Risks of Sour-Gas Wells

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Hydrogen Sulfide Can Be Handled Safely

Cited by 30 publications

References 0 publications

Chemical Biology of H2S Signaling through Persulfidation

Chemical Biology of H2S Signaling through Persulfidation

Production of sensitive gas sensors using CuO/SnO2 nanoparticles

Predicting and Managing the Health Risks of Sour-Gas Wells

Contact Info

Product

Resources

About

Chemical Biology of H₂S Signaling through Persulfidation

Chemical Biology of H₂S Signaling through Persulfidation