NEWS
CHEMTICS
09
2020
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11
Sterilization and virus killing principle of sodium hypochlorite
As we all know, the main action mode of sodium hypochlorite is to form hypochlorite through its hydrolysis, and then hypochlorite is further decomposed to form new ecological oxygen [O]. The strong oxidation of new ecological oxygen denatures the proteins on bacteria and viruses, thus killing pathogenic microorganisms. In fact, the principle of chlorine disinfection is to produce hypochlorite and then release new ecological oxygen.
According to the chemical determination, sodium hypochlorite with ppm concentration is almost completely hydrolyzed into hypochlorite in water, and its efficiency is higher than 99.99%. The process can be expressed as follows
NaClO + H2O ＝ HClO + NaOH
HClO → HCl + [O]
It can not only kill bacteria and viruses, but also react with chloric acid to kill viruses and viruses.
R-NH-R + HClO → R2NCl + H2O
At the same time, the chloride ion produced by hypochlorite can also significantly change the osmotic pressure of bacteria and viruses, making their cells lose activity and die.
In addition, sodium hypochlorite can also decompose the Trace Pesticide Residues in vegetables, fruits and other agricultural and sideline products. The vast majority of pesticides are composed of organic compounds, which can be oxidized and decomposed by the new oxygen released by sodium hypochlorite. This undoubtedly has a significant role in promoting the development of modern agriculture, fruit and vegetable packaging industry.
It is also worth affirming that the disinfectant produced by sodium hypochlorite generator does not produce free chlorine in water like chlorine, chlorine dioxide and other disinfectants, so it is generally difficult to form carcinogens harmful to human health due to the existence of free chlorine; it is also not like ozone, as long as there is a very weak amount (0.001mg / m3) in the air, it will cause damage and toxicity to life; and Moreover, it will not cause serious corrosion to the metal pipeline as chlorine reacts with water to form hydrochloric acid.
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