Desiccants are substances which draw in moisture from their surrounding environment. Some also desorb moisture into the atmosphere. They are eco friendly and help in protecting the environment. They prepare chemicals in chemical plants, protect moisture sensitive items, protect against corrosion, etc.
Desiccants provide excellent corrosion protection for dehydration applications such as natural gas storage, air dehydration, gas pipeline heaters, etc. Some common desiccants are activated carbon, sodium perchlorate, calcium sulfate, silica gel, salt, and rice. Salt is used to preserve dead bodies especially in hospitals for exhibition and also in Egypt to preserve mummies, which prevents the decay. Rice is used to maintain granularity of salt and prevent the moisture from sticking to the edges of the salt shakers.
They also serve as evaporation means say for example, many objects are allowed to evaporate and if their moisture content matches with the enviornment conditions then it is difficult to allow them to evaporate water on their own, hence desiccants can take care of this job effectively without affecting the environment. They can be used for variety of applications since some desiccants are anti fungal, anti microbial, or anti viral.
Moist metal surfaces are very much prone to corrosion. Desiccants absorb all the moisture on the metals and prevent them from corrosion and hence are very much environment friendly.
Desiccants like salt are not toxic and hence are environmental friendly. Highly reactive desiccants are rarely preferred, people always use chemically stable ones such that they don’t react to any of the existing environment setups causing harmful effects to life. Some desiccants are said to eliminate carbon from air and cool the atmosphere, thus acting as natural coolers during hot summer and saving power.
While packing substances like food grains, it is very much essential that entire air and moisture is removed from the packet in order to prevent the grains from rottening. Hence desiccants can act as absorbents and remove the air and moisture thus reducing the decay. This will very much help in overseas shipping of items such as cameras, books, coin collection, antiques, guns, any other electronic equipments etc. Activated charcoal is the best desiccant for this purpose since it absorbs the moisture and air thus preventing the goods from damage.
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