What Are The Different Types of H2S Scavengers Available?

Hydrogen sulfide (H2S) scavengers are available in various forms, each with its own advantages and disadvantages.

The most common type of hydrogen sulfide scavengers  is the hydrogen sulfide receptor (HSR). HSRs are small molecules that can bind to and remove H2S from the atmosphere.

HSRs have several advantages over other types of scavengers. They are small and easy to produce, they are selective for H2S, and they have a high affinity for H2S.

However, HSRs have several disadvantages as well. They are not effective against other types of pollutants, they are not resistant to degradation or oxidation, and they have a short half-life. Another type of H2S scavenger is the H2S-responsive molecule (H2SM). These molecules respond to a specific level of H2S in the atmosphere, and only activate when this level is exceeded. 

When activated, they are released from their dormant state, where they have been stored in the membrane of the cell. Once released into the cell, they chemically modify or destroy other components that would interfere with or inhibit their activity. The most common form of HSCs are metallo-cysteine sulfoxides (MCSSs) which bind to sulfur containing compounds, like hydrogen sulfide (HS), as well as several other species such as nitrogen dioxide (NO), nitric oxide (NO) and peroxynitrite (ONOO). 

Sulfur removing enzymes are responsible for breaking down S-containing molecules such as hydrogen sulfide (HS) or free oxygen radicals (ROS). In addition, many different organic molecules such as polyamines, amino acids and prostaglandins are destroyed using similar mechanisms.