Formaldehyde adsorbent prepared from attapulgite of Jingyuan, Gansu

Abstract

The invention discloses a formaldehyde adsorbent prepared from attapulgite of Jingyuan, Gansu, and relates to the technical field of formaldehyde adsorbents. The preparation method comprises the following steps: firstly, crushing and grinding attapulgite raw ores, separately adding 100 g of the attapulgite clay to 75 ml of sulfuric acid solutions with concentrations of 1 mol / L, 1.5 mol / L, 2 mol / Land 3 mol / L according to a solid-to-liquid ratio of 4:3, uniformly carrying out stirring, and carrying out standing for 2 hours for acidification; and after acidification is finished, respectively immersing the obtained mixtures into TiO2 solutions with concentrations of 3%, 6%, 9% and 12%, carrying out drying at 120-150 DEG C for 1 hour, carrying out cooling to room temperature, respectively carrying out grinding, and carrying out sieving by using standard sieves of 5 meshes, 10 meshes, 20 meshes and 100 meshes (powder), respectively carrying out heat treatment at temperatures of 250 DEG C, 300 DEG C, 350 DEG C and 400 DEG C for 1 hour, 2 hours, 3 hours and 4 hours to obtain the modified and activated attapulgite clay formaldehyde adsorbent. According to the invention, natural mineral resources are utilized, the raw materials are easy to obtain, cost is low, the process is simple, corrosion is avoided, the use is safe, the adsorption rate is high, meanwhile the research that the modified attapulgite clay adsorbs formaldehyde has important economic and environmental significance, and economic development is facilitated.

Description

technical field [0001] The invention relates to the technical field of Gansu Jingyuan attapulgite formaldehyde adsorbent, in particular to a Gansu Jingyuan attapulgite formaldehyde adsorbent. Background technique [0002] Attapulgite is a natural nanomaterial with high internal and external specific surface areas, and has a 3 、H 2 S, SO 2 and NO 2 Equipolar small molecule gases have larger adsorption capacity. At present, my country is already one of the main resource countries and producers of attapulgite clay, and Gansu is the place with the largest reserves of attapulgite clay in the world. Formaldehyde is a colorless, pungent odor that can be smelled at low concentrations. The human's olfactory threshold for formaldehyde is usually 0.06-0.07mg / m 3 . However, there are large individual differences, and some people can reach 2.66mg / m 3 . Long-term, low-concentration exposure to formaldehyde can cause headaches, dizziness, fatigue, sensory disturbances, decreased im...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a Gansu Jingyuan attapulgite formaldehyde adsorbent in order to solve the problems of poor formaldehyde adsorption, high cost and poor adsorption effect in the prior art

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