Mineral coagulant aid for treating water and preparation method thereof

Abstract

The invention discloses a mineral coagulant aid for treating water and a preparation method thereof. The preparation method comprises the following steps: S1) adding silicate into water at solid-to-liquid ratio of 1:(5-10), thereby forming a silicate solution; S2) adding 0.1-0.5% of dispersing agent into the silicate solution in mass percent; S3) performing settling separation on the silicate solution, taking the upper suspended solids, performing solid-liquid separation on the upper suspended solids and taking the solid as an intermediate solid product; S4) adding chitosan into glacial acetic acid, wherein the ratio of chitosan to glacial acetic acid is 1-5g: 1L, stirring and then forming a first mixed solution; S5) adding the intermediate solid product into the first mixed solution, wherein the ratio of the intermediate solid product to the mixed solution is 1g: 5-10mL, stirring and then forming a second mixed solution; S6) performing solid-liquid separation on the second mixed solution and drying the solid under the condition at 50-80 DEG C, thereby acquiring an environmental mineral coagulant aid. The mineral coagulant aid cannot cause the secondary pollution, is safe and reliable and is suitable for water treatment.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a mineral coagulation aid for water treatment and a preparation method thereof. Background technique [0002] With industrial progress and social development, water pollution has become increasingly serious and has become the world's number one environmental governance problem. Increasing water pollution has posed a major threat to human survival and has become a major obstacle to human health, economic and social sustainable development. According to a survey by the world's authoritative organization, in developing countries, 80% of various diseases are spread by drinking unsanitary water, and drinking unsanitary water causes at least 20 million deaths worldwide every year. Therefore, water pollution is called "World's Number One Killer". [0003] In a broad sense, a coagulant aid refers to any chemical agent that cannot be used alone as a coagulant in a specific water...

AI Technical Summary

Problems solved by technology

Polyacrylamide is an organic polymer product, which has the advantages of less dosage and stable effect; however, polyacrylamide has a fatal disadvantage, that is, it has certain biological toxicity, and its toxicity comes from some organic substances in the composition

Due to its toxicity, there are still certain residues in the water after polyacrylamide treatment, which will bring certain safety hazards to subsequent use.

In addition, another disadvantage of polyacrylamide is that it is expensive, generally 10,000 to 20,000 yuan / ton

Images