Efficient phosphorous removing agent and preparation method thereof

Abstract

The invention provides an efficient phosphorous removing agent and a preparation method thereof, and belongs to the technical field of water treatment agents. The phosphorous removing agent is prepared from 15-35 parts of modified montmorillonite, 1-15 parts of iron-nickle compound agent, 10-40 parts of lanthanum-modified attapulgite, 10-50 parts of coal ash, 5-10 parts of polyaluminum chloride, 1-10 parts of alchlor, 1-8 parts of calcium oxide and 2-20 parts of poly(diallyldimethylammonium chloride). In the efficient phosphorous removing agent, the lanthanum-modified attapulgite and the modified montmorillonite have large specific surface areas and doped metal ions, phosphorus in water can be subjected to effective physical and chemical adsorption, the metal salt can effectively remove phosphate and polyphosphate, the polyaluminum chloride and the poly(diallyldimethylammonium chloride) can effectively remove the phosphorus through coagulating sedimentation, the application range is wide, the efficient phosphorous removing agent can be used in a wide pH range, the dosage is small, and the efficient phosphorous removing agent is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of water treatment chemicals, in particular to a high-efficiency phosphorus removal agent, and at the same time, the invention also relates to a preparation method of the above-mentioned high-efficiency phosphorus removal agent. Background technique [0002] With the development of industry and agriculture and the growth of population, the production and consumption of chemical fertilizers, pesticides, and phosphorus-containing detergents in my country have increased rapidly, and the eutrophication of water bodies caused by water pollution has become increasingly serious. Tourism and many other industries also pose a huge threat to drinking water hygiene and food safety, and the main nutrients that cause eutrophication of water bodies include organic carbon, nitrogen, phosphorus, potassium, etc. It can be basically removed after treatment, and the content of other components other than nitrogen and phosphorus ...

AI Technical Summary

Problems solved by technology

Chemical phosphorus removal includes chemical precipitation, ion exchange, reverse osmosis and other methods. Chemical precipitation is the most widely used method. The latter two methods are difficult to use because of their high treatment costs.

[0004] At present, the agents used for chemical auxiliary phosphorus removal of sewage can be mainly divided into aluminum salts, iron salts, calcium salts, natural adsorbents and flocculants, etc., but metal salt phosphorus removal agents have poor phosphorus removal effects and are likely to cause new pollution. The scope of application is narrow, and although natural adsorbents have a huge specific surface area, if they are not modified, they can only remove phosphorus through physical adsorption, and the effect is poor, while flocculants usually play an auxiliary role in the process of phosphorus removal, and these When the phosphorus removal agent is used alone, the pH range of the sewage is narrow

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