We may have heard of hydrogen sulphide for a long time, but you know that hydrogen sulphide can kill people. The details in the table below.
Physiological effects of hydrogen sulfide.
The concentration of hydrogen sulfide in the air (Parts per million: ppm)on
30 ppm : bad smell like rotten eggs,
100 ppm : olfactory nerve degeneration in 2-15 minutes,
200 ppm: cough and conjunctivitis
300 ppm : olfactory nerves deteriorate rapidly
600 ppm : end of consciousness within 30 minutes,
800 ppm : end of consciousness.
1000 ppm : end-consciousness instantly
2000 ppm : died in a few minutes
Hydrogen sulfide
name Hydrogen sulfide
AKA .name Sewer gas, Sour gas, Pit gas, Hydrosulfuric acid, Sulfuretted hydrogen,.
Physical
colorless gas with a rotten egg smell. Heavier
description
hydrogen sulfide is a gas smell. Caused by the decomposition of waste and the remains of the creature. This gas is a gas suffocation (asphyxiation) are poisonous. Frequent cause of death Especially in the case into the potholes that look like underwater Confined fishing with dead fish rotting pile. Pit manure, livestock manure, etc.
standard in the workplace
ACGIH TLV - TWA 10 PPM, STEL 15 PPM
NIOSH REL - C 10 PPM (15 mg / m3)
OSHA PEL - C 20 PPM, Maximum Peak 50 PPM in 10 minutes |. ||||
IDLH 100 PPM
labor law, Thailand C 20 ppm,. 2549),
the air pollution emitted from industrial chimneys must not exceed 100 ppm in the production process that does not burn fuel and up to 80 ppm in the process of burning fuel.
Standard body ACGIH BEI - N / A Property carcinogen IARC N / A ||||| ACGIH N / A source found in nature.
Hydrogen sulfide found in nature This gas caused by the decomposition of organic substances containing sulfur components, such as manure, waste fossil creatures. Deep-sea species are mixed with gas due to the decomposition of the remains of marine creatures. The volcanic eruption, it would have come out with this type of gas (Volcanic gas) establishments that have found this type of gas. Bo compost Made of cow dung as manure, pig manure on farms.
In the waste water treatment Drain and peel Sewage treatment works Underwater fishing The bins fish Inside are the remains of rotten fish pile up Corn or rice mill in a shed somewhere. The barn is a mechanism for loading grain into the interior belt. Under this type of equipment, which will include a small piece of rice or corn fell into a pile. Drilling for oil and natural gas are at risk of exposure from this source of marine fossils. Including refining, oil and natural gas as well. The underground coal mines Water is a substance used in a nuclear reactor [1]
In the spring, some of which have high sulfur [2] As a result, during the manufacturing process (By product) of tannery plant pulp.
The heat of the asphalt (asphalt fume) production plant and carbon disulfide (carbon disulfide) [2] The mechanism of pathogenesis. Binding and inhibiting the enzyme cytochrome oxidase in the mitochondria of the cells can not breathe (cellular asphyxiant) mechanism is the same mechanism of cyanide poisoning. (Cyanide) also has the effect of irritating the mucous membranes such as eyes, nose, trachea, lungs, causing pneumonia directly with water.
Preparing for emergencies
The incident has been the bane of this type is the most common victim is in a confined space. (Self-contained breathing apparatus, SCBA) and must have a team to help with the above. This gas is heavier than air The pungent smells foul The level of exposure it is only 0.025 ppm only flammable gas. And explosive (NFPA Code:. H4 F4 R0) rescue team to help, should not cause a spark in the final scene [3] clinical symptoms. acute Symptoms include irritation symptoms, the effects of inhibition of cell respiration ||||| irritation to the nose does not smell (Olfactory nerve paralysis) occurs at concentrations of 100 - 150 ppm, which causes loss of ability. a careful eye, nose, throat, bronchial symptoms, chest pain, shortness of breath, breathing quickly occur frequently. May have eyelid spasms Or skin burns occur. Lung irritation will cause pulmonary edema. (noncardiogenic pulmonary edema), inflammation of the lung parenchyma (chemical pneumonitis) symptoms occur within 2-3 hours after the onset of exposure ||||| inhibit breathing is faster.
Since gas is inhaled, can be absorbed into the body much better. At a concentration of 600 - 800 ppm often makes the inhaled gas unconscious and died immediately. (Knockdown) syndrome is a very common reason for having this kind of gas. If the symptoms are less severe headaches, nausea, vomiting, dizziness, uncontrollable seizures and coma are symptoms of long-term exposure to very small amounts in the long term can cause eye irritation. Corneal ulcers, dizziness, weakness, nausea, the smell for a long time. The nose is adaptable not smell gas. Which is why it can not be built when gas volume is unusually high and strong odor [4]
The survivors of the gas inhaled in large quantities. Symptoms may include mood swings personality changes Calculation of the brain The nose is adaptable not smell gas. Which is why it can not be built when gas volume is unusually high and strong odor [4] The survivors of the gas inhaled in large quantities. Symptoms may include mood swings personality changes Calculation of the brain The nose is adaptable not smell gas. Which is why it can not be built when gas volume is unusually high and strong odor [4] The survivors of the gas inhaled in large quantities. Symptoms may include mood swings
personality changes calculation of the brain.
reference
:http://www.summacheeva.org/index_thaitox_hydrogen_sulfide.htm
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