Preparation method and phosphorus removal method of zirconium oxide-loading phosphorus removal biological composite material

Abstract

The invention relates to a preparation method and a phosphorus removal method of a zirconium oxide-loading phosphorus removal biological composite material. The preparation method comprises: dissolving zirconium oxychloride in dehydrated alcohol, adding brine shrimp egg shell, carrying out ultrasonic and magnetic stirring at a room temperature to make the zirconium oxychloride gradually diffuse to the inner surface of egg shell pore channels, placing into a water bath pot to evaporate the ethanol, taking the egg shell out, adding the zirconium oxychloride-loading egg shell to a NaOH solution, carrying out mechanical stirring at a room temperature, carrying out in situ precipitation to produce zirconium hydroxide in the egg shell pore channels, filtering, washing the shell egg complex a plurality of times with distilled water until achieving the neutral state, and drying in a drying oven to prepare the zirconium oxide-loading brine shrimp egg shell biological composite material. The phosphorus removal method comprises that: phosphate-containing sewage passes through a cylindrical fixed bed absorption device filled with the zirconium oxide-loading brine shrimp egg shell biological composite material in a forward flow manner so as to efficiently purify the phosphate-containing sewage; the composite material after absorption is subjected to desorption by using a NaOH and NaCl mixing solution, and the desorbed composite material is subjected to water washing by using deionized water to achieve the neutral state so as to be recycled.

Description

technical field [0001] The invention relates to a method for preparing a biocomposite material and removing phosphorus. Background technique [0002] At present, the main methods of phosphorus removal are: chemical precipitation method, biological method, adsorption and ion exchange method, etc. Phosphorus removal by chemical precipitation requires additional dosing equipment, and it is easy to cause secondary pollution; algae has a good phosphorus removal effect, but the cultivation period of algae is long, although the loss of water flow is large, the cost is high, and algae is also an indirect factor leading to eutrophication of water body , the removal and control of algae is also a major problem in the field of environmental science at present, and many eutrophic algae can secrete toxins, which will be enriched along the food chain, affecting the reproduction and economic value of aquatic animals; Phosphorus concentration has a wide range of adaptability, but the selec...

AI Technical Summary

Problems solved by technology

For activated carbon and ultra-high cross-linked resin carrier materials, the pore structure is mainly micropores. The inorganic adsorbent carried by such porous materials is affected by the nanopore template effect, and the particles are small and uniformly dispersed, with potential nano Due to the small size effect, although it has a large adsorption capacity for phosphate ions in water, due to the fine and microporous structure of the carrier, the mass transfer rate of the adsorbent is not good, so it is used in high-speed (20-100BV / h) fluid adsorption of drinking water The system shows disadvantages such as low working adsorption capacity and poor adsorption utilization efficiency.

For carrier materials such as zeolite and macroporous resins, the pores are wide, and the composite material has excellent adsorption and mass transfer performance; however, its macroporous structure often leads to particle growth and local agglomeration when loaded with inorganic adsorbents, so that the nanometer size effect is missing. low adsorption capacity