Eutrophicated water endogenous phosphorus passivation material and preparation method thereof

Abstract

The invention relates to an eutrophication water body endogenous phosphorus passivation material and a preparation method thereof, and belongs to the technical field of phosphorus passivation materials. In the existing passivation technology, the common problem of low phosphorus adsorption capacity also has the problems of short action life, single action and the like, new passivation materials need to be applied for multiple times, and other ammonia nitrogen and the like in a water body are not effectively controlled. The anti-corrosion agent comprises the following raw materials in parts by weight: 10-20 parts of zeolite powder, 30-50 parts of kaolin, 10-15 parts of lanthanum strong acid salt, 5-10 parts of magnesium strong acid salt and 5-10 parts of alum. The adsorbent is ecological and safe, has good compatibility with bottom mud, does not need to consume the alkalinity of a water body during application, has a passivation function on various anions or cations, and is large in adsorption capacity and long in effective life.

Description

technical field [0001] An eutrophication water body source phosphorus passivation material and a preparation method thereof belong to the technical field of phosphorus passivation materials. Background technique [0002] Water eutrophication is a type of organic pollution that deteriorates water quality due to excessive nitrogen, phosphorus and other nutrients entering natural water bodies. In general, about half of the nitrogen fertilizers applied to farmland are not used, and flow into groundwater or ponds and lakes, and a large amount of domestic sewage often makes the water body over-fertilized. Excessive nutrients promote the proliferation of phytoplankton in the waters, such as cyanobacteria, diatoms and aquatic plants, and sometimes the entire water surface is covered by algae to form a "bloom". Caused fish to die due to lack of oxygen. [0003] In my country, a large number of lakes, reservoirs, rivers and other water bodies are seriously eutrophic, causing the flo...

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Problems solved by technology

[0008] However, in the existing passivation technology, in addition to the common problem of low phosphorus adsorption capacity, there are also problems such as short action life and single action (only for phosphorus). As mentioned above, endogenous phosphorus generally takes the form of water in water The form of internal circulation circulates between water, organisms and sediment. The passivation material used at one time can only act in the water for 20 days. After 20 days, even if the passivated phosphorus is not released into the water, it is difficult to continue to adsorb. In an internal circulation period, when the free phosphorus in the water body increases, new passivation materials need to be applied again, which increases the cost and the treatment effect is poor, and there is no effective control effect on other organic components such as ammonia nitrogen in the water body, and it is necessary to add Other treatment materials lead to a longer construction period and an increase in artificial components in the water body, which is not conducive to environmental protection or greatly increases costs

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