A method for preparing strontium-rich activated carbon by hydrothermal method

Abstract

The invention discloses a method for preparing strontium-rich activated carbon by the aid of hydrothermal processes. The method includes steps of a), pretreating activated carbon, to be more specific,placing the proportioned activated carbon in diluted edible hydrochloric acid solution, heating the proportioned activated carbon in the diluted edible hydrochloric acid solution, carrying out impurity removal cleaning, further carrying out suction filtration, repeatedly washing the activated carbon, washing off surface residual acid liquid, boiling the activated carbon by water, then repeatedlyrinsing the activated carbon until the pH (potential of hydrogen) value of the activated carbon is 6.5-8.5, placing the activated carbon in drying ovens and drying the activated carbon for standby application; b), impregnating and loading strontium salt, to be more specific, slowly adding the pretreated proportioned activated carbon into impregnation liquid with diffusing agents and coupling agents, impregnating and stirring the activated carbon for 10 min, then adding strontium salt solution into the impregnation liquid and uniformly mixing and stirring the strontium salt solution and the activated carbon with each other in the impregnation liquid; c), carrying out hydrothermal reaction procedures, to be more specific, placing impregnated activated carbon solution in hydrothermal reactionkettles, keeping the temperatures constant for 2-6 hours after the hydrothermal reaction temperatures are increased and reach 130-250 DEG C and the pressures of the reaction kettles reach approximately 1MPa, carrying out still standing and temperature reduction after reaction is completely carried out, carrying suction filtration and cleaning, washing off surface residual impregnation liquid, then placing reaction products in drying ovens, and drying the reaction products at the temperatures of 120-150 DEGC to obtain the impregnated-hydrothermal strontium-rich activated carbon.

Description

technical field [0001] The invention belongs to the technical field of deep processing and preparation of activated carbon and its application. It specifically relates to the application of strontium-rich activated carbon in the field of drinking water. Background technique [0002] It is well known that water is the most important component of the human body, yet its nutritional contribution to the human body has often been overlooked over the years. Natural water contains calcium, magnesium, sodium, potassium, bicarbonate, sulfate, silicon, zinc, iodine, fluorine, chromium, lithium, molybdenum, selenium, cobalt, vanadium and other soluble mineral ions, which are biologically usable It is a good source of high-quality minerals, so drinking an appropriate amount of natural mineral water is good for the body, and can supplement some trace elements for the human body. An appropriate amount of the mineral element strontium is beneficial to human health. Strontium can regulate...

AI Technical Summary

Problems solved by technology

[0004] The strontium-loaded activated carbon prepared by impregnation, co-precipitation and other modification methods has problems such as active component crystallites blocking the micropores, reducing pore volume and adsorption capacity; the active component and the carrier are not firmly combined and easy to fall off.