Explanation

Also called biocide. A chemical agent used to kill or inhibit microorganisms such as bacteria, fungi, and algae in water bodies. germicide and algicide can destroy microbial cell walls, cell membranes and intracellular substances, thus inhibiting microbial respiration and metabolic activity, hindering the synthesis of proteins and nucleic acids, and ultimately leading to microbial inactivation. It is divided into oxidizing, non oxidizing, and heavy metal salts. Oxidative germicide and algicide kills bacteria and algae through oxidation mechanism. Generally, it is a strong oxidizer. Hypochloric acid, atomic oxygen, etc. produced by oxidizer can oxidize some enzymes closely related to metabolism in microorganisms to form W. It can quickly control the synthesis of microbial proteins. It kills microorganisms, such as chlorine, hypomalate, chlorine dioxide, ozone, hydrogen peroxide, etc. Chlorine, bleaching powder concentrate and chlorine dioxide are widely used. Non oxidizing germicide and algicide combine with special parts of microorganisms through chemical bonding to denature bacterial albumen, destroy the structure of DNA in bacterial cells and cause DNA to lose its reproductive capacity or inhibit bacterial respiration and glycolysis, thus playing a bactericidal and algaecidal role, such as chlorophenols, cyanide containing compounds (dioxycyanomethane), heterocyclic compounds (isothiazolinone), quaternary ammonium salt compounds, quaternary rattan salt compounds No organic tin compounds, organic aldehydes, etc. Heavy metal ions of heavy metal salts germicide and algicide can S exchange the non-toxic ions adsorbed on the surface of the cell, changing the nature of the cell membrane. Some heavy metal ions can also enter human cells and combine with egg endoplasm or enzymes, leading to microbial death. The commonly used heavy metal ions are Ag+, Cu2+and Zn2+.

Classification