scholarly journals Seasonal and interannual study of volatile reduced sulfur compounds (VRSC) in coastal environment: the Bay of Quiberon (Brittany, France)

2009 ◽  
Vol 6 (5) ◽  
pp. 10057-10088 ◽  
Author(s):  
A. Cozic-Houly ◽  
E. Viollier ◽  
G. Sarazin ◽  
J. Knoery
Keyword(s):  
Hydrogen Sulfide ◽  
Water Column ◽  
Seasonal Variations ◽  
Dimethyl Sulfide ◽  
Carbonyl Sulfide ◽  
Dimethyl Disulfide ◽  
Coastal Environment ◽  
Water Interface ◽  
Reduced Sulfur Compounds ◽  
Coastal Marine

Abstract. Seasonal and annual variability of hydrogen sulfide (H2S), carbonyl sulfide (OCS), methane thiol (MeSH), dimethyl sulfide (DMS) and dimethyl disulfide (DMDS) concentrations and supporting parameters (e.g., phytoplanktonic cells abundance) were investigated in a coastal marine environment, the Bay of Quiberon (Brittany, France) from July 2004 to August 2006. The sampling was conducted in the water column, within two meters of the sediment water interface (SWI). Minimum and maximum values were <0.1–1.6 nmol L−1 for H2S, <0.1–4.2 nmol L−1 for OCS, <0.1–7.8 nmol L−1 for MeSH, <0.1–17.5 nmol L−1 for DMS and <0.1–1.7 nmol L−1 for DMDS. Vertical carbonyl sulfide distribution showed seasonal variations with lower concentration near the SWI in winter and bottom enrichments near sediments in summer. Vertical sulfide distribution not seems to be influenced by the shallow sediments. The likely influence of Dinophyceae abundance on the MeSH, DMS and DMDS concentrations was evident for the 3-summer monitored period.

scholarly journals Removal of sulfur contaminants from biogas to enable direct catalytic methanation

2019 ◽  
Author(s):  
Christian Dannesboe ◽  
John Bøgild Hansen ◽  
Ib Johannsen
Keyword(s):  
Hydrogen Sulfide ◽  
Dimethyl Sulfide ◽  
Renewable Energy Sources ◽  
Sulfur Removal ◽  
Carbonyl Sulfide ◽  
Acidithiobacillus Thiooxidans ◽  
Carbon Utilization ◽  
Combined System ◽  
Renewable Biomass ◽  
Biogas Reactor

AbstractIn the near future, renewable energy sources will replace fossil energy. To allow full carbon utilization of renewable biomass, we have demonstrated a possible integration between a biogas reactor, an electrolysis unit, and a catalytic methanation reactor. Stringent removal of all sulfur contaminants in raw biogas is required to enable this integration. We demonstrate how existing bulk sulfur removal solutions, like a biotrickling filter loaded with Acidithiobacillus thiooxidans and impregnated activated carbon, are unable to meet this requirement. Only the main sulfur contaminant hydrogen sulfide (H2S) can effectively be removed. Contaminants carbon disulfide (CS2), dimethyl sulfide (DMS), and carbonyl sulfide (COS) will leak through the carbon filter, long before hydrogen sulfide can be detected. Utilization of surplus oxygen from the combined system is proven problem free and allows sulfur removal without introducing contaminants. Provided that a recommended sulfur guard is included, the proposed design is ready for full-scale implementation.

Production performance of laying hens at peak lay, sulfur compounds in manure, and selected serum profiles: efficacy of Lactobacillus species as probiotics

2020 ◽  
Vol 60 (2) ◽  
pp. 296
Author(s):  
K. Saksrithai ◽  
N. H. Willits ◽  
A. J. King
Keyword(s):  
Dimethyl Sulfide ◽  
Laying Hens ◽  
Egg Quality ◽  
Carbonyl Sulfide ◽  
Poultry Manure ◽  
Serum Biochemistry ◽  
Sulfur Compounds ◽  
Production Performance ◽  
Lactobacillus Species ◽  
Reduced Sulfur Compounds

ContextProbiotics have potential to improve health of laying hens, thus improving the overall quality of eggs. AimsA study was conducted to evaluate the use of probiotics containing Lactobacillus species to improve egg quality and serum biochemistry, and to lower the concentration of sulfur-containing gas compounds from poultry manure. MethodsNinety-six White Leghorn W-36 laying hens (32 weeks old) were randomly assigned to two feeding treatments: Control and Control + Probiotics. A combination of probiotics (Lactobacillus paracasei, L. plantarum and L. rhamnosus totalling 1 × 1012 CFU/kg feed) was provided for 8 weeks. At Weeks 0, 4 and 8, eggs were analysed for weight, shell thickness, albumen height and Haugh unit. Faecal matter was analysed for total sulfur, sulfate-sulfur and 20 reduced sulfur compounds. Blood serum was analysed for amylase, calcium, phosphate, total cholesterol and triglycerides. Key resultsNo significant differences were observed between the two treatments for any of the parameters. Five sulfide gases were detected in manure: hydrogen sulfide (H2S), dimethyl sulfide (CH3)2S, methyl mercaptan (CH3SH), carbonyl sulfide (COS) and carbon disulfide (CS2). Ratios of various detectable gases were computed. Trends for ratios H2S:(CH3)2S, H2S:CS2, and H2S:COS from manure for both treatments were &gt;1, whereas the ratios H2S:CH3SH and (CH3)2S:CH3SH were &lt;1. ConclusionOverall, probiotics did not enhance production, egg quality or the serum profile. ImplicationsPossibly, the concentration of probiotics was too high, limiting bacterial colonisation and beneficial effects.

Operational overview of the NASA GTE/CITE 3 airborne instrument intercomparisons for sulfur dioxide, hydrogen sulfide, carbonyl sulfide, dimethyl sulfide, and carbon disulfide

1993 ◽  
Vol 98 (D12) ◽  
pp. 23291 ◽  
Author(s):  
James M. Hoell ◽  
Douglas D. Davis ◽  
Gerald L. Gregory ◽  
Robert J. McNeal ◽  
Richard J. Bendura ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Sulfur Dioxide ◽  
Carbon Disulfide ◽  
Dimethyl Sulfide ◽  
Carbonyl Sulfide

Pulmonary Excretion of Hydrogen Sulfide, Methanethiol, Dimethyl Sulfide and Dimethyl Disulfide in Mice

1978 ◽  
Vol 1 (4) ◽  
pp. 327-338 ◽  
Author(s):  
Jeffrey L. Susman ◽  
James F. Horing ◽  
Sally C. Thomae ◽  
Roger P. Smith
Keyword(s):  
Hydrogen Sulfide ◽  
Dimethyl Sulfide ◽  
Dimethyl Disulfide ◽  
Pulmonary Excretion

scholarly journals The Role of Oral Microbiota in Intra-Oral Halitosis

2020 ◽  
Vol 9 (8) ◽  
pp. 2484 ◽  
Author(s):  
Katarzyna Hampelska ◽  
Marcelina Maria Jaworska ◽  
Zuzanna Łucja Babalska ◽  
Tomasz M. Karpiński
Keyword(s):  
Hydrogen Sulfide ◽  
Dimethyl Sulfide ◽  
Anaerobic Bacteria ◽  
Dimethyl Disulfide ◽  
Oral Bacteria ◽  
Oral Microbiota ◽  
Low Concentrations ◽  
Aldehydes And Ketones ◽  
Common Ailment

Halitosis is a common ailment concerning 15% to 60% of the human population. Halitosis can be divided into extra-oral halitosis (EOH) and intra-oral halitosis (IOH). The IOH is formed by volatile compounds, which are produced mainly by anaerobic bacteria. To these odorous substances belong volatile sulfur compounds (VSCs), aromatic compounds, amines, short-chain fatty or organic acids, alcohols, aliphatic compounds, aldehydes, and ketones. The most important VSCs are hydrogen sulfide, dimethyl sulfide, dimethyl disulfide, and methyl mercaptan. VSCs can be toxic for human cells even at low concentrations. The oral bacteria most related to halitosis are Actinomyces spp., Bacteroides spp., Dialister spp., Eubacterium spp., Fusobacterium spp., Leptotrichia spp., Peptostreptococcus spp., Porphyromonas spp., Prevotella spp., Selenomonas spp., Solobacterium spp., Tannerella forsythia, and Veillonella spp. Most bacteria that cause halitosis are responsible for periodontitis, but they can also affect the development of oral and digestive tract cancers. Malodorous agents responsible for carcinogenesis are hydrogen sulfide and acetaldehyde.

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