Composite medicament for fixing nitrogen and phosphorous in riverbed sludge, and preparation and application method thereof

Abstract

The invention discloses a composite medicament for fixing nitrogen and phosphorous in riverbed sludge, and a preparation method and an application method thereof. The composite medicament disclosed herein comprises 90-99 wt% of powdered zeolite and 1-10 wt% of polymer ferric sulfate, and is prepared by mixing powdered zeolite and polymer ferric sulfate according to the proportion, and preparing into particles through mechanical molding. When using the composite medicament, the composite medicament is uniformly put into the water environment of rivers and lakes, and the dosage of the composite medicament is 0.5-2 kg / m<2>. The composite medicament has the advantages of low preparation cost, and good effect, can fast sink to the bottom when putting the composite medicament into water, uniformly disperses, effectively inhibits the release of endogenous nitrogen, phosphor, heavy metal, organic matters and the like, reduces the pollutant concentration of the overlying water, improves the water-bed ecological environment, and reduces eutrophication level and the occurrence of risk of water.

Description

technical field [0001] The invention belongs to the technical field of water environment pollution control, and specifically relates to a compound agent for fixing pollutants such as nitrogen and phosphorus in river and lake bottom mud, inhibiting the release of internal pollutants in water, and purifying water quality, and a preparation and use method thereof. Background technique [0002] Sediment is an important part of the water ecosystem. The self-purification of water includes dilution, precipitation, adsorption, and biodegradation. Sediment adsorption and biodegradation are the main forms of migration and transformation of water pollutants. Sediment has a positive effect on water self-purification. important role. As a large amount of industrial wastewater and domestic sewage are discharged into the water body, the water quality will deteriorate and the sediment will also be polluted. There is a dynamic balance of absorption and release between the sediment and the w...

AI Technical Summary

Problems solved by technology

In-situ coverage requires a large amount of covering (such as cleaning bottom mud, sand or gravel, etc.), reduces water volume, and affects aquatic ecology. It is not suitable for rivers, lakes, and landscape water bodies. It is more suitable for deep sea mud pollution control; the cost of microbial preparations is high. Short shelf life, slow action, and limited by water environment conditions, it is difficult to use on a large scale

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