>Home>Products>

hydrogen sulfide addition :

Hydrogen sulfide H2S - PubChem

Hydrogen sulfide can also result from industrial activities, such as food processing, coke ovens, kraft paper mills, tanneries, and petroleum refineries.Hydrogen sulfide is a flammable, colorless gas with a characteristic odor of rotten eggs. It is commonly

More

Plasma-Chemical Conversion of Hydrogen Sulfide in the ...

2017-9-11  Plasma-chemical conversion of hydrogen sulfide in the atmosphere of methane with addition of CO2 and O2 in the nonequilibrium plasma of barrier discharge is studied. The degree of hydrogen sulfide removal reaches 97 vol%. The degree of methane transformation does not exceed 14 vol%. Gaseous reaction products contain hydrogen, carbon oxides, and C2–C4 hydrocarbons. The energy

More

Copper(II) addition to white wines containing hydrogen ...

2014-12-5  After the addition of sulfide to white wine, copper(II) was added to give an increasing mole ratio of hydrogen sulfide to copper(II). After settling for 1–5 days, negligible copper was removed after racking or filtering (0.45 or 0.20 μm), as determined by flame atomic absorption spectroscopy.

More

Hydrogen Sulfide - Hazards Occupational Safety and ...

2 天前  Hydrogen sulfide is a highly flammable, explosive gas, and can cause possible life-threatening situations if not properly handled. In addition, hydrogen sulfide gas burns and produces other toxic vapors and gases, such as sulfur dioxide.

More

Hydrogen Sulfide Oxidation and Sewer Corrosion

2009-6-18  hydrogen sulfide addition and the corrosion by a period after hydrogen sulfide addition, referred to as post exposure corrosion. In order to describe these relationships, a setup of concrete sewers is constructed; in this case an already existing setup is modified to the purpose of this experiment.

More

Hydrogen Sulfide - Emergency and Continuous Exposure ...

In addition, hydrogen sulfide is a contact irritant with a dose-response relationship that is similar among species. A 90-day CEGL of 0.8 ppm was derived. Further support of the committee’s recommended value is derived from studies performed by Schroeter et al. (2006). A pharmacokinetic-driven computational fluid dynamics (CFD) model was used ...

More

Fluorescent probe for detecting hydrogen sulfide based on ...

2020-5-3  In view of the importance of hydrogen sulfide (H2S) in the organism, a fast, noninvasive method for the detection of H2S in situ is needed. Fluorescent probes based on disulfide-bond nucleophilic substitution-addition can selectively detect H2S in vivo, which is very popular because it allows quick response for H2S, thus it will be a useful tool for monitoring H2S in the vivo.

More

Reactions of organic compounds with liquid hydrogen

2020-10-13  hydrogen sulfide vere carried out in the Franklin type reaction tube made of specially thicfc lime-magnesia glass-tubing* Th5g penaitted of a closed distillation of the hydrogen sulfide from one arm to the other by sii:Q>ly cooling the eanpty arm of the tube* In this way solubilities could readily be determin­ ed and reaction products noted.

More

New method for quantification of gasotransmitter

2017-4-13  However, in addition to these free forms (H 2 S, HS −, S 2−), hydrogen sulfide also exists in other bound forms in the biological matrix, such as the acid labile, alkaline labile, and ...

More

Mechanistic study of microbial control of hydrogen sulfide ...

Microbial control of biogenic production of hydrogen sulfide in oil fields was studied in a model system consisting of pure cultures of the nitrate-reducing, sulfide-oxidizing bacterium (NR-SOB) Thiomicrospira sp. strain CVO and the sulfate-reducing bacterium (SRB) Desulfovibrio sp. strain Lac6, as well as in microbial cultures enriched from produced water of a Canadian oil reservoir.

More

A concentration dependent auto-relay-recognition by the ...

A concentration dependent auto-relay-recognition by the same analyte: a dual fluorescence switch-on by hydrogen sulfide via Michael addition followed by reduction and staining for bio-activity Org Biomol Chem. 2016 Jan 14;14(2):570-576. doi: 10.1039/c5ob02008e. ...

More

Chapter 4 Hydrogen Sulfide and Sulfuric Acid Estimation ...

2011-8-23  In addition, once the hydrogen sulfide gas is released it usually disperses throughout the sewer environment and never reaches a high enough concentration to be forced back into solution. The four sulfide chemical species are related according to the following equilibrium:

More

A highly selective fluorescent probe based on Michael ...

2017-2-15  1. Introduction. Hydrogen sulfide (H 2 S) is a colorless gas with a typical rotten egg odor. It has long been considered chemical pollutants with toxicity. Exposing in the H 2 S will irritate respiratory system and excessive inhalation will make people lose consciousness, cardiac arrest and even death , , .In addition, the excess H 2 S in aerobic environment could have a negative effect on the ...

More

Hydrogen sulfide H2S - PubChem

Hydrogen sulfide can also result from industrial activities, such as food processing, coke ovens, kraft paper mills, tanneries, and petroleum refineries.Hydrogen sulfide is a flammable, colorless gas with a characteristic odor of rotten eggs. It is commonly

More

Addition of Hydrogen Sulfide to Juglone Request PDF

Evidence of the addition of hydrogen sulfide to 5-hydroxy-1,4-naphthoquinone (juglone) in aqueous solution was obtained by nuclear magnetic resonance spectrometry (NMR), electron paramagnetic ...

More

Hydrogen Sulfide Oxidation and Sewer Corrosion

2009-6-18  hydrogen sulfide addition and the corrosion by a period after hydrogen sulfide addition, referred to as post exposure corrosion. In order to describe these relationships, a setup of concrete sewers is constructed; in this case an already existing setup is modified to the purpose of this experiment.

More

Reaction of Hydrogen Sulfide with Disulfide and Sulfenic ...

2020-9-10  Kinetics of Hydrogen Sulfide Reactions with Disulfides by Continuous UV-Visible Measurements—Reactions were initi-ated by the addition of low amounts (30–500 establishedprotocol(19,30).2-(Methylsulfonyl)1,3-benzothia-M)ofNa 2 Sto disulfides in pseudo-first order excess in borate (100 mM,pH 9.5, 0.1 mM DTPA) or phosphate (100 mM, pH 7.4, 0.1 mM

More

Hydrogen Sulfide and Endothelium-Dependent

2014-12-16  In addition to nitric oxide and carbon monoxide, hydrogen sulfide (H 2 S), synthesized enzymatically from l-cysteine or l-homocysteine, is the third gasotransmitter in mammals.Endogenous H 2 S is involved in the regulation of many physiological processes, including vascular tone. Although initially it was suggested that in the vascular wall H 2 S is synthesized only by smooth muscle cells and ...

More

Evaluation of Chemical Oxidizers for Hydrogen Sulfide

action rates of oxygen with sulfide, oxygen addition is practical only under pressurized conditions.1'2 For ex ample, oxygen may be introduced as pure oxygen or as air into force mains, air lift aerators, and pressure tanks.2 Oxygen may also be supplied into a non-pressurized sewer through hydrogen peroxide addition. Hydrogen

More

New method for quantification of gasotransmitter

2017-4-13  However, in addition to these free forms (H 2 S, HS −, S 2−), hydrogen sulfide also exists in other bound forms in the biological matrix, such as the acid labile, alkaline labile, and ...

More

Chapter 4 Hydrogen Sulfide and Sulfuric Acid Estimation ...

2011-8-23  In addition, once the hydrogen sulfide gas is released it usually disperses throughout the sewer environment and never reaches a high enough concentration to be forced back into solution. The four sulfide chemical species are related according to the following equilibrium:

More

Hydrogen Sulfide: The Good, The Bad, And The

2019-7-2  Hydrogen Sulfide And Digestive Health. H2S can damage the gastrointestinal epithelium (cause leaky gut) Those with constipation-predominant IBS have been found in some studies to have a bacterial imbalance, in particular, a significant increase of sulfate reducing bacteria, and fecal sulfide, indicating a potential role for sulfide

More

Reactions of organic compounds with liquid hydrogen

2020-10-13  hydrogen sulfide vere carried out in the Franklin type reaction tube made of specially thicfc lime-magnesia glass-tubing* Th5g penaitted of a closed distillation of the hydrogen sulfide from one arm to the other by sii:Q>ly cooling the eanpty arm of the tube* In this way solubilities could readily be determin­ ed and reaction products noted.

More

Hydrogen Sulfide Medical Management Guidelines

Hydrogen sulfide is a colorless, flammable, highly toxic gas. It is shipped as a liquefied, compressed gas. It has a characteristic rotten-egg odor that is detectable at concentrations as low as 0.5 ppb. Synonyms include dihydrogen sulfide, sulfur hydride, sulfurated hydrogen, hydrosulfuric acid, ,sewer gas,swamp gas,hepatic acid, sour gas, and stink damp

More

Hydrogen Sulfide - Borregaard

Hydrogen sulfide (H 2 S) is a toxic gas characterized by a rotten egg odour at low concentrations while being odourless at high concentrations (>100 ppm). H 2 S can be present in sub-surface formation as a gas or in dissolved form in water/brine. If the oil or gas contains significant amounts of H 2 S, it is referred to as ‘sour’.The presence of H 2 S in the oil field makes the extraction ...

More

A concentration dependent auto-relay-recognition by the ...

2015-10-15  A concentration dependent auto-relay-recognition by the same analyte: a dual fluorescence switch-on by hydrogen sulfide via Michael addition followed by reduction and staining for bio-activity A. K. Das, S. Goswami, G. Dutta, S. Maity, T. K. Mandal, K. Khanra and N. Bhattacharyya, Org. Biomol.

More

Addition of Hydrogen Sulfide to Juglone Request PDF

Evidence of the addition of hydrogen sulfide to 5-hydroxy-1,4-naphthoquinone (juglone) in aqueous solution was obtained by nuclear magnetic resonance spectrometry (NMR), electron paramagnetic ...

More

Hydrogen Sulfide in Aqueous Solvents 25 - NIST

2014-10-23  studied, addition of hydrochloric acid and of zinc chloride increased the solubility of hydrogen sulfide but addition of ferrous chloride decreased solubility. Further work on these systems is required before quantitative relationships can be reliably established. Dede Becker (7) measured solubilities, in solutions of calcium chloride, of

More

Chapter 4 Hydrogen Sulfide and Sulfuric Acid Estimation ...

2011-8-23  In addition, once the hydrogen sulfide gas is released it usually disperses throughout the sewer environment and never reaches a high enough concentration to be forced back into solution. The four sulfide chemical species are related according to the following equilibrium:

More

Evaluation of Chemical Oxidizers for Hydrogen Sulfide

action rates of oxygen with sulfide, oxygen addition is practical only under pressurized conditions.1'2 For ex ample, oxygen may be introduced as pure oxygen or as air into force mains, air lift aerators, and pressure tanks.2 Oxygen may also be supplied into a non-pressurized sewer through hydrogen peroxide addition. Hydrogen

More

Hydrogen Sulfide and Endothelium-Dependent

2014-12-16  In addition to nitric oxide and carbon monoxide, hydrogen sulfide (H 2 S), synthesized enzymatically from l-cysteine or l-homocysteine, is the third gasotransmitter in mammals.Endogenous H 2 S is involved in the regulation of many physiological processes, including vascular tone. Although initially it was suggested that in the vascular wall H 2 S is synthesized only by smooth muscle cells and ...

More

Hydrogen sulfide removal from biogas using chemical ...

2021-10-10  2015). An effective method for reduction of hydrogen sulfide comprises the addition of iron chloride, iron oxide or iron hydroxide directly to the digester, or along with feed substrate in a pre-storage tank. This method is effective for lowering the H 2 S fraction in biogas and needs to be operated in combination with some another H 2

More

The basics of detecting Hydrogen sulphide for workers

The Basics of Detecting Hydrogen sulphide. Hydrogen sulphide is a colourless, flammable and an extremely hazardous gas with a “rotten egg” smell. H 2 S is also referred to as the “knock down gas” because inhalation of high concentrations can

More

Synthesis, Metabolism, and Signaling Mechanisms of ...

2019-5-31  Abstract. In addition to nitric oxide (NO) and carbon monoxide (CO), hydrogen sulfide (H 2 S) has recently emerged as the novel gasotransmitter involved in the regulation of the nervous system, cardiovascular functions, inflammatory response, gastrointestinal system, and renal function. H 2 S is synthesized from l-cysteine and/or l-homocysteine by cystathionine β-synthase, cystathionine γ ...

More

Hydrogen Sulfide: The Good, The Bad, And The

2019-7-2  Hydrogen Sulfide And Digestive Health. H2S can damage the gastrointestinal epithelium (cause leaky gut) Those with constipation-predominant IBS have been found in some studies to have a bacterial imbalance, in particular, a significant increase of sulfate reducing bacteria, and fecal sulfide, indicating a potential role for sulfide

More

Methods for Hydrogen Sulphide Removal from Biogas

2020-12-17  While boilers can withstand concentrations of H 2 S up to 1000 ppm, and relatively low pressures, internal combustion engines operate best when H 2 S is maintained below 100 ppm. The common methods for hydrogen sulphide removal from biogas

More

H2S Monitors and Gas Detectors CI Analytics

In addition, sour natural gas can produce corrosion of pipelines during transport given the caustic nature of hydrogen sulfide which may react with the iron of the stainless-steel ducts in contact with the natural gas. Accumulation of resulting undesirable salts at the pipeline surface may create pressure changes and potentially fatal leaks or ...

More

Bio-orthogonal “click-and-release” donation of caged ...

With the recent addition of hydrogen sulfide (H 2 S) to the list of biologically-relevant gasotransmitters, 1 significant efforts have focused on developing H 2 S donors as powerful research, and potentially therapeutic, tools. 2,3 Endogenous H 2 S

More

Hydrogen Sulfide (H CAS 7783-060-4; UN 1053

2014-10-22  Hydrogen sulfide is a colorless, flammable, highly toxic gas. It is shipped as a liquefied, compressed gas. It has a characteristic ... In addition, decreased ability to smell hydrogen sulfide occurs at concentrations greater than 100 ppm. Respiratory Inhaled hydrogen sulfide initially affects the

More