Iron-based compound water treatment agent FPFS-1 and preparation method thereof

Abstract

The invention discloses an iron-based compound water treatment agent FPFS-1 and a preparation method thereof. The preparation method comprises the following steps: dissolving green copperas with water, adds sulphuric acid and a catalyst into the mixture for reaction to make Fe2+ completely oxidized and polymerized to form inorganic polymer compound liquid polymeric ferric sulfate, wherein the reaction temperature is room temperature, the reaction time is between 0.5 and 4.0 hours, and the material weight ratio of ferrous sulfate heptahydrate to the sulphuric acid to the catalyst is 100:4-20:3-10; and then adding an organic polymer compound into the obtained liquid polymeric ferric sulfate for compounding to form a colloidal FPFS-1 product of the invention. Tests show that the total iron accounts for 11 to 13 mass percent of the product, the basicity of the product is between 12 and 16 percent and the reducing substance (taking Fe2+ as a reference) accounts for less than 0.005 mass percent of the product. The iron-based compound water treatment agent FPFS-1 obviously improves the flocculation performance, has rapid sedimentation and clear water in the water treatment process, has good sediment filter performance, has no iron ion migration and has the unique characteristics of removing COD, BOD and chroma and deodorizing.

Description

【Technical field】 [0001] The invention relates to an iron-based composite water treatment agent FPFS-1 and a preparation method thereof. 【Background technique】 [0002] At present, the water treatment agents on the market are mainly aluminum-based flocculants. In recent years, many studies at home and abroad have found that aluminum is a chronic poison. After the source water is treated with aluminum salt flocculants in the waterworks, the aluminum content in the factory water increases significantly, and a considerable amount of aluminum is easily absorbed and combined by the human body. Aluminum in drinking water is more harmful to the human body than other The source of aluminum is large, after it enters the human body, it can accumulate in some tissues and organs, causing various diseases. When aluminum accumulates in the central nervous system, it will block the conduction of neurons, cause memory loss or loss, and cause diseases such as senile dementia; aluminum easi...

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Problems solved by technology

[0004] Although the research on polyferric at home and abroad started in the 1980s, the main product so far is polyferric sulfate. Due to the poor performance of the product, Fe 2+ Incomplete conversion affects the treatment effect, coupled with production process and technical reasons, resulting in product limitations and cannot completely replace aluminum products

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