Polyacrylic acid/13X molecular sieve adsorbent and method for preparing same

Abstract

The invention relates to a polyacrylic acid / 13X molecular sieve adsorbent and a method for preparing the polyacrylic acid / 13X molecular sieve adsorbent. According to the technical scheme, the method for preparing the polyacrylic acid / 13X molecular sieve adsorbent includes the steps of using a polyacrylic acid solution with the mass fraction of 13.5wt% and with the pH value ranging from 3.8 to 4.2 as a raw material, adding a 13X molecular sieve to the polyacrylic acid solution under the stirring condition to prepare mixed liquor of polyacrylic acid and the 13X modulator sieve, stirring the prepared mixed liquor of the polyacrylic acid and the 13X modulator sieve at the rotating speed ranging from 200r / min to 300r / min under the room temperature for 2 hours to 3 hours, then, directly placing the mixed liquor into a muffle furnace, roasting the stirred mixed liquor under the temperature ranging from 100 DEG C to 220 DEG C for 2 hours to 3 hours, and grinding the roasted mixed liquor into powder to prepare the polyacrylic acid / 13X molecular sieve adsorbent. The method for preparing the polyacrylic acid / 13X molecular sieve adsorbent is simple in procedure, the secondary pollution is not caused, and the prepared polyacrylic acid / 13X molecular sieve adsorbent is large in grain diameter, can easily settle down, is good in adsorptive performance, and is suitable for processing waste water containing industrial basic dye.

Description

technical field [0001] The invention belongs to the technical field of adsorbents. In particular, it relates to a polyacrylic acid / 13X molecular sieve adsorbent and a preparation method thereof. Background technique [0002] Basic dyes have complex components, high chroma and high toxicity, and are one of the main pollutants in my country's water environment. At present, the treatment methods of basic dye wastewater are mainly activated sludge method, biofilm method, photocatalytic method and physical and chemical method. Since the 1980s, basic dyes in the printing and dyeing industry have mostly used high-molecular substances that are difficult to biodegrade, and the biodegradability of high-molecular substances is poor, so the activated sludge method and biofilm method are limited. Photocatalysis is limited in practical applications due to the defects of high cost, poor thermal stability, non-response to visible light and difficult separation of photocatalyst titanium di...

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Problems solved by technology

J. Huang et al. studied that after the attapulgite was modified by the surfactant octadecyltrimethylammonium chloride (OTMAC), the surface changed from hydrophilic to lipophilic, thereby increasing the adsorption of organic pollutants. performance (J. Huang, X. Wang, Q. Jin, etal. Removal of phenol from aqueous solution by adsorption onto OTMAC-modified attapulgite. Journal of Environmental Management. 84 (2007) 229-236.), but OTMAC-attapulgite The soil adsorbent is prepared by a wet method, which has the disadvantages of using a large amount of modifier OTMAC and causing secondary pollution during the preparation process.

[0004] Molecular sieve is a crystalline aluminosilicate. Due to its open skeleton structure, large crystal cavity volume and a large number of uniform micropores, its interior and exterior have The large specific surface area can provide good adsorption reaction sites for macromolecules, but for some larger dye molecules in practical applications, the pore size of molecular sieves is still not large enough, and the expected adsorption effect cannot be achieved only by internal micropores

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