Hydrogen Sulfide (H2S) is a gas that is dissolved and is known for its pungent and unpleasant smell. It gives out the stench of a rotten egg and has a very foul taste. Apart from being a health hazard (when present in high quantities), H2S can also lead to corrosion of piping systems. It creates an unpleasant odor in the house and also can turn your fixtures and water black in color. High-quality sterling silver can turn into black almost instantaneously when it comes in contact with Hydrogen Sulfide. H2S is highly pungent and can cause an odor problem even at very low concentration levels as low as 0.05 mg/l (ppm). It is therefore important to remove it from water and other sources. It gets generated in many industries and therefore oil-refineries and other such units have well-established ways and means to remove H2S from biogas, oil and other end-products.
Hydrogen Sulfide In Well Water
H2S occurs quite often in well water and it caused because of the presence of sulfate-reducing bacteria. It also could be present in stored water systems. Bacteria are the most common cause for the presence of hydrogen sulfide scavengers. Therefore, treatment should be focused on eliminating and controlling bacteria. This should be the first line of approach. Shock chlorination is considered to be the standard treatment for controlling sulfate-reducing bacteria and iron bacteria.
Water Heaters And H2S Problem
There could be situations where H2S may be present only in the hot water that is stored and used in households. This happens because of a biological reaction between sulfates in the water, the presence, and multiplication of sulfate-reducing bacteria or the presence of organic matter in the water. Identifying the source of the problem is important before coming out with the treatment approach. If the problem is caused by sulfate-reducing bacteria which thrive on hot water, you must disinfect the water heater using chlorine bleach or hydrogen peroxide. Be sure that the drain is not the source of hydrogen sulfide and the smell associated with it.
How To Solve The Problem
Disinfection is the first step and the water heater must be thoroughly flushed and made completely free from all types of sediments. This can be done quite easily with the help of a large diameter garden hose that has a connecting flush valve at the bottom of the water heater. The water heater must be flushed with the right pressure for around 15 to 30 minutes. This will help remove all sediments. The inlet valve should then be closed and you must then add around 3 to 4 large bottles of hydrogen peroxide. This will help remove the hydrogen sulfide concentration completely.
Other Traditional Methods
Other traditional methods can also be used. Chlorination along with activated carbon filter is a simple but effective method. H2S is oxidized because of the presence of chlorine and the insoluble sulfide particles are taken away because of the activated carbon filter. The filter also comes in handy for removing any residual chlorine that remains after oxidation of the hydrogen sulfide.
Hence if you look around there are professional as well as natural ways that could help in removing hydrogen sulfide from water and other sources.
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