Eggshell supported nano-iron material for removing phosphate in water and preparing method thereof

Abstract

The invention relates to an eggshell supported nano-iron material for removing phosphate in water and a preparing method thereof, and belongs to the technical field of repairing water body pollution materials. The eggshell supported nano-iron material is formed by eggshell powder and nano-iron supported in inner pores and on the surface of the eggshell powder, the average particle size of the eggshell powder is 100-200 mesh, and the particle size of the nano-iron is 7-100 nm. The material can prevent the nano-iron from oxidizing better and improve the oxidation resistance, and the material can be used on a large scale after being dried, is high in reaction speed, good in dephosphorization effect, high in efficiency and easy to recover and treat, allows magnetic separation and achieves reuse of waste.

Description

technical field [0001] The invention relates to a material for removing phosphate in water and a preparation method thereof, more specifically, the invention relates to an eggshell-loaded nano-iron material for removing phosphate in water and a preparation method thereof, which belongs to repairing water body pollution field of materials technology. Background technique [0002] Phosphorus pollution refers to the discharge of a large amount of phosphorus into lakes and rivers and other water bodies due to human production and life, which increases the nutrient load of water bodies and leads to deterioration of water quality. Phosphorus does not exist in any gaseous compounds in nature, and mainly exists in two phases of typical sedimentary cycle materials-rock phase and dissolved salt phase. The phosphorus in the water body mainly comes from endogenous phosphorus and exogenous phosphorus, and the endogenous phosphorus is mainly phosphorus in the phosphorus-rich substrate,...

AI Technical Summary

Problems solved by technology

[0026] The present invention aims to solve the problems in the prior art that when using iron salts to modify eggshells to remove phosphate in water, the removal efficiency is low, the removal effect is general, and the follow-up is not easy to recycle and treat, and provides an eggshell for removing phosphate in water The shell-loaded nano-iron material can better prevent the oxidation of nano-iron and improve its anti-oxidation ability. The product can be used on a large scale after drying, has a fast reaction rate, good phosphorus removal effect, can be magnetically separated, and is easy to recycle. Reuse of waste

Images