The invention belongs to the technical field of drinking water purification materials, and discloses a drinking water difunctional filtering carbon material which is capable of efficiently removing
heavy metals, high in mineral substance
retention rate and high in safety, and a preparation method and application of the drinking water difunctional filtering carbon material. The preparation method comprises the following steps: (1) mixing a primary carbonized material, a binder, a pore forming agent and a
transition metal salt solution, kneading and forming, and
drying to obtain a
green body; (2) sequentially carrying out secondary
carbonization treatment and thermal activation treatment on the
green body, cooling, washing with water until the
conductivity of a washing solution is constant, and
drying to obtain a porous carrier; (3) immersing the porous carrier in the oxidation modification solution, carrying out
solid-liquid separation, washing with water, and
drying to obtain a porous oxidation carrier; and (4) immersing the hot porous oxidation carrier in the alkaline
polyamine modified solution, adjusting the pH value of the mixture to be close to neutral when the temperature is reduced to
room temperature, carrying out
solid-liquid separation, and carrying out heat treatment to obtain the drinking water dual-function filtering carbon material, wherein the temperature of the porous oxidation carrier is higher than that of the alkaline
polyamine modified solution.