Method for purifying water quality by utilizing composite disinfectant

Abstract

The invention relates to the application field of water treatment, and more particularly relates to a method for purifying water quality by utilizing composite disinfectant. The composite disinfectant is prepared by mixing polymeric aluminum-ferric salt and persulfate or peroxy hydrosulfate according to the mass ratio of 1:1-5; according to the proportion that every 1000L of drinking water is added with 20-100g of composite disinfectant, the composite disinfectant is added into the drinking water and slowly stirred, the polymeric aluminum-ferric salt is continuously hydrolyzed to generate precipitate of aluminium hydroxide and ferric hydroxide, and the drinking water can be purified by flocculation of precipitation of hydroxide; meanwhile, the persulfate or the peroxy hydrosulfate is catalyzed by ferric ion in the water to generate sulphuric acid free radical, and the sulphuric acid free radical having high oxidizing activity can be used for killing microorganism in the water and degrading inorganic and organic contaminant, thus achieving the double functions of purifying water and sterilizing. The composite disinfectant does not contain chlorine and can be used for disinfecting the water without byproducts, so as to be safe for the human body and environment-friendly. The method is especially suitable for disinfecting the drinking water by field working staff and the people in the disaster areas of earthquake and flood.

Description

technical field [0001] The invention relates to the field of water treatment applications, in particular to a method for purifying water by using compound disinfectants. Background technique [0002] The most commonly used disinfectants for drinking water are mainly chlorine-containing disinfectants. Chlorine-containing disinfectants mainly refer to hypochlorous acid (HClO) which dissolves in water to produce microbicidal activity. Hypochlorous acid with high oxidative properties has a small molecular weight and is easy to diffuse to the surface of bacteria and penetrate the cell membrane into the bacteria, making the bacteria Protein oxidation leads to bacterial death. Chlorine-based disinfectants kill a wide range of microorganisms, including bacterial propagules, viruses, fungi, tubercle bacilli, and the most resistant bacterial spores. Such disinfectants include inorganic chlorine compounds (such as sodium hypochlorite, calcium hypochlorite, chlorinated trisodium phosp...

AI Technical Summary

Problems solved by technology

Inorganic chlorine is unstable, easily affected by light, heat and humidity, and loses its active ingredients. Organic chlorine is relatively stable, but it is unstable after being dissolved in water.

The main disadvantage of chlorine-based disinfectants is the production of chlorine-containing by-products such as trichlorethylene, which can cause harm to the skin, eyes, and respiratory system, as well as carcinogenic, teratogenic, and mutagenic effects.

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