US 12,522,513 B2 · Mineralized iron-carbon composite material, preparation method therefor, and application thereof

Abstract

An iron-carbon composite material, a preparation method therefor, and an application thereof related to microbial technology applications. The method includes the following steps: a cross-linking and curing step: carrying out cross-linking and curing to iron powder and biological activated carbon by using an alkaline earth metal salt and a cross-linking agent; and a mineralization treatment step: soaking the cross-linked and cured iron-carbon composite material in a mineralization bacteria solution for 5-15 min, and carrying out drying to obtain an iron-carbon composite material. Mineralization bacteria utilize alkaline earth metal ions to form an alkaline earth metal carbonate structure on the surface of the iron-carbon composite material, thereby greatly improving the strength of the iron-carbon composite material; in addition, the soaking time in the mineralization bacteria solution is controlled to prevent the formation of a compact metal carbonate film from affecting the functioning of effective components in the iron-carbon composite material.

Claims6

Dependent claims

A method for preparing an iron-carbon composite material, wherein the method comprises the following steps:

a step for preparing acid-pickled iron powder:
acid-pickling iron powder to obtain acid-pickled iron powder;
a cross-linking and curing step:
mixing the acid-pickled iron powder, the carbon powder, the cross-linking agent and water,
then adding the mixture into an alkaline earth metal salt solution for still standing, and
carrying out solid-liquid separation and drying to obtain a cross-linked and cured iron-carbon composite material;
and
a mineralization treatment step:
soaking the cross-linked and cured iron-carbon composite material in a mineralization bacteria solution for 5-15 min, and carrying out drying to obtain an iron-carbon composite material;
wherein:
the cross-linking agent is sodium alginate;
an optical density of the mineralization bacteria solution at 600 nm ranges from 1 to 5;
and
a mass ratio of the acid-pickled iron powder to the carbon powder to the cross-linking agent is (40-80):(10-30):(3-6).

11 more elements

Dependencies are inferred from the claim text.

Mineralized iron-carbon composite material, preparation method therefor, and application thereof

Life of this patent

Mineralized iron-carbon composite material, preparation method therefor, and application thereof

Life of this patent

Abstract

Claims6