FILTERING MATERIAL HAVING ARSENIC AND HEAVY METAL ADSORBING AND FIXING FUNCTIONS, AND APPLICATION THEREOF AND PREPARATION METHOD THEREFOR

摘要

The invention provides a filter material having a function of adsorbing and fixing arsenic and heavy metals and usage thereof. The filter material comprises a porous ceramic substrate with a porosity of 35%-85%, and zero-valent iron nanoparticles formed in situ within the porous ceramic substrate. The porous ceramic substrate has micropores of 2-10 micron, and a fluffy amorphous silicon-iron-carbon structure is formed within each micropore. At least 25wt% of the ceramic component constituting the porous ceramic substrate is diatomaceous earth, and the fluffy amorphous silicon-iron-carbon structure within the micropore can form an adsorption film after water absorption. In the microstructure, the filter material obtained in the invention is configured as a porous and fluffy nose-like filter structure and generates an adsorption film, thereby greatly improving the adsorption efficiency and adapting to changes in water quality and chemical environment. The used filter material will not fall off and no heavy metal will be separated therefrom, thereby ensuring the security of use.