Method for removing phosphorus in water by using resin-loaded ferric oxide hydrate

Abstract

The invention relates to a method for removing phosphorus in water by using resin-loaded ferric oxide hydrate, which comprises the following steps: preparing a ferric oxide hydrate-resin (HFO-301) composite resin, adding the prepared HFO-301 resin into mixed wastewater containing inorganic phosphorus, HETP and TPhP, regulating the pH value, and carrying out oscillation reaction. The prepared HFO-301 composite resin can synchronously adsorb inorganic phosphorus and organic phosphorus, and the purpose of removing phosphorus-containing pollutants in water is achieved. The prepared HFO-301 can absorb inorganic phosphorus on one hand and can remove organophosphorus such as triphenyl phosphate (TPhP) and Hydroxyethylidene-1,1-diphosphonic acid (HEDP) on the other hand through non-specific electrostatic adsorption, ligand exchange and inner-layer complexing action. It is shown by researches that the prepared nano resin composite material has the advantages of low resin preparation cost, simple process, high treatment efficiency, wide pH application range, high stability and the like, and has great potential in the aspect of phosphorus-containing wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a method for removing phosphorus in water by using resin-loaded hydrated iron oxide. Background technique [0002] At present, a large amount of phosphorus-containing wastewater is produced in daily life and industrial production. The total phosphorus content of washing wastewater and industrial descaling agent wastewater far exceeds the standard. Once discharged into natural water bodies, it will cause water eutrophication and algal blooms. and other hazards, causing serious pollution to natural water bodies. The relevant national sewage discharge standards stipulate that after the sewage has undergone advanced treatment, the total phosphorus concentration in the discharged water shall not exceed 0.5mg / L. Look for high-efficiency phosphorus removal materials, and use supporting water treatment processes to effectively remove phosphorus in water to protect the st...

AI Technical Summary

Problems solved by technology

The chemical precipitation method is to turn phosphate into insoluble salt and then precipitate it. This method needs to pay attention to the reaction pH, and the dosage of chemicals is large, resulting in a large amount of waste salt. There is a risk of secondary pollution during the treatment process. Biological phosphorus removal mainly uses biological Phosphorus is removed by biochemical action, and the phosphorus in water is removed through the ability of phosphorus-accumulating bacteria to absorb phosphorus. This process will produce a large amount of sludge, and phosphorus-containing sludge must be treated in time. The reaction environment has a great impact on the removal effect.