Hydrogen Sulfide

_This is the organizing page for research related to hydrogen sulfide in Public Lab._ (above: [DIY colorimetric strips](/notes/megan/9-7-2012/first-experiment-analyzed) reacting to H2S by @megan) ### What is hydrogen sulfide, what are its effects, and where is it found? Hydrogen sulfide, with the chemical formula H2S, is a flammable gas that has a pungent odor at low concentrations and is odorless at higher concentrations. It can be a respiratory irritant and a neurotoxin. [Read more about hydrogen sulfide health effects](/wiki/hydrogen-sulfide-effects). Hydrogen sulfide is naturally formed in low-oxygen conditions with sulfate present, such as in organic-rich sediments and thus in petrochemical source rocks. Upon exposure to oxygen, hydrogen sulfide readily oxidizes to sulfur dioxide or sulfate, and generally reacts within hours to days. [Read more about hydrogen sulfide sources and spatial and temporal variation](/wiki/hydrogen-sulfide-environment) ### How are hydrogen sulfide emissions and exposures regulated? In the United States, hydrogen sulfide emissions are only federally regulated to the extent that they contribute to sulfur dioxide formation, and thus acid rain. These emissions are regulated through the Prevention of Significant Deterioration of major stationary sources review and permitting. Exposure to hydrogen sulfide is mostly regulated in terms of occupational exposure, with very few states regulating ambient exposure to this toxin. [Read more about hydrogen sulfide regulations](/wiki/hydrogen-sulfide-regulations) ## How can hydrogen sulfide be measured? While there is no federal regulatory method for hydrogen sulfide in the US, labs, agencies, and oilfield workers often measure hydrogen sulfide gas through several different means: * badges or glass tubes that change color * continuously sampling electronic sensors, some worn by oilfield workers * [air grab sampling](/wiki/air-sampling), as by the Bucket Brigades, tested with gas chromatography > We're compiling information about the **pros, cons, prices, and sensitivity/limitations** of these techniques: [What are different commercially available hydrogen sulfide detection methods?](/notes/warren/12-04-2017/what-are-different-commercially-available-hydrogen-sulfide-detection-methods) ## Do-It-Yourself approaches to detection There are three prototype, low-cost hydrogen sulfide detection methods currently being explored by Public Lab community members. These include: * a [method using photographic paper](/wiki/hydrogen-sulfide-photopaper) * a [copper tarnishing method](/wiki/hydrogen-sulfide-copper-pipe) * a technique using a [Do-It-Yourself potentiostat](/notes/JSummers/03-10-2014/quantifying-airborne-hydrogen-sulfide) * commercial [electronic H2S sensors](/wiki/hydrogen-sulfide-sensor) connected to a computer or #arduino > Help out! Please help link the above bullet points to corresponding pages across this site. **** ## Questions We can't make progress on these techniques and resources without addressing our unknowns. Please ask questions to help shape the direction of our work! [questions:hydrogen-sulfide] **** ## Related pages See [other related wiki pages here](https://publiclab.org/wiki/tag/hydrogen-sulfide) **** ## Activities These activities are to guide you to test out hydrogen sulfide detection methods or use these tools in the field: [activities:hydrogen-sulfide] **** ## Where can I find more information? Two particularly good resources are listed below. Other hydrogen sulfide wiki pages (mentioned above) include additional relevant resources. 1. Agency for Toxic Substance and Disease Registry. 2016. Hydrogen Sulfide Fact Sheet. [https://www.atsdr.cdc.gov/ToxProfiles/tp114-c1-b.pdf](https://www.atsdr.cdc.gov/ToxProfiles/tp114-c1-b.pdf). 2. National Research Council. 2010. Acute Exposure Guidelines. [https://www.epa.gov/sites/production/files/2014-11/documents/hydrogen_sulfide_final_volume9_2010.pdf](https://www.epa.gov/sites/production/files/2014-11/documents/hydrogen_sulfide_final_volume9_2010.pdf). ...

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Title URL Last edited Edits Page Views Likes
Purafil Corrosion Coupons /wiki/corrosion-coupons over 2 years ago by gretchengehrke 4 907 1
Hydrogen Sulfide Copper Pipe Testing /wiki/hydrogen-sulfide-copper-pipe over 2 years ago by stevie 13 1,610 3
Hydrogen Sulfide Detection /wiki/hydrogen-sulfide-detection almost 3 years ago by gretchengehrke 5 1,625 0
Hydrogen Sulfide Regulations /wiki/hydrogen-sulfide-regulations almost 3 years ago by stevie 11 2,391 1
Hydrogen Sulfide in the Environment /wiki/hydrogen-sulfide-environment about 3 years ago by gretchengehrke 2 762 0
Hydrogen Sulfide Effects /wiki/hydrogen-sulfide-effects almost 3 years ago by warren 7 626 1
Water Sensors /wiki/water-sensors almost 3 years ago by Nova 41 4,649 6
Hydrogen Sulfide from CAFOs in Iowa /wiki/sensing-hydrogen-sulfide-from-cafo-emissions-in-poweshiek-county-iowa over 6 years ago by sophie 8 164 0
Wyoming Hydrogen Sulfide Testing 2013-2014 /wiki/wyoming-hydrogen-sulfide-testing-2013-2014 over 6 years ago by ewilder 10 302 1
Suggested Experiment for Collapsed Salt Marsh H2S Test Strip Study /wiki/suggested-experiment-collapsed-salt-marsh-h2s-test-strip-study over 7 years ago by liz 2 131 0
New Mexico Hydrogen Sulfide testing planning page /wiki/new-mexico-hydrogen-sulfide-testing-planning-page over 8 years ago by Shannon 11 158 0
Rhus H2S experiment /wiki/rhus-h2s-experiment over 8 years ago by deepwinter 7 129 1
Electronic Hydrogen Sulfide Sensors /wiki/hydrogen-sulfide-sensor almost 3 years ago by warren 63 2,718 3
Hydrogen Sulfide /wiki/hydrogen-sulfide about 1 year ago by warren 38 882 2