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

摘要

The present invention relates to a filtering material having arsenic and heavy metal adsorbing and fixing functions, and an application thereof. The filtering material is formed by a porous ceramic matrix having a porosity of 35 to 85% and nanometer zerovalent iron particles in-situ generated in the porous ceramic. The micropore size of the porous ceramic matrix is 2 to 10 micrometers. A fuzzy amorphous silicon-iron-carbon structure is formed in the micropore. Ceramic components of the porous ceramic matrix comprise at least 25wt% of diatomite. After absorbing water, the fuzzy amorphous silicon-iron-carbon structure in the micropore can form an adsorption film. The filtering material obtained in the present invention forms a nose-like porous fluffy filtering structure in the microstructure and generates an adsorption film, so that the absorbing efficiency is greatly improved, and the filtering material can be adapted to the chemical environment change of water. Shedding or heavy metal precipitation does not occur on the used filtering material, and the use safety of the filtering material is good.