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Adsorbent, preparation method and application thereof

An adsorbent and reaction technology, applied in the field of adsorbent preparation, can solve the problems of low adsorption efficiency of adsorbent, high toxicity of raw materials, etc., and achieve the effects of low price, low production cost and easy preparation

Active Publication Date: 2018-11-09
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and deficiencies of the prior art, the purpose of the present invention is to provide an adsorbent, a preparation method and its application, so as to solve the problems of the existing adsorbents with low adsorption efficiency and high toxicity of raw materials

Method used

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  • Adsorbent, preparation method and application thereof

Examples

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preparation example Construction

[0027] The preparation method of adsorbent of the present invention specifically comprises:

[0028] Step 1: Mix carboxymethyl cellulose solution and gelatin solution according to the above ratio, and heat at 30-60° C. for 30-120 minutes to obtain a mixed solution. A 0.2% (w / v) solution of carboxymethylcellulose and a 4% (w / v) solution of gelatin are preferred.

[0029] Step 2: Add the pyrrole monomer to the mixed solution in step 1 and stir evenly, then add chromic acid as an oxidizing agent to initiate the polymerization of the pyrrole monomer, and react at 10-30°C for 12-24 hours to obtain carboxymethylcellulose / gelatin / polymer Pyrrole hydrogel, namely the adsorbent of the present invention;

[0030] Wherein, the mass ratio of pyrrole monomer to chromic acid is 67:118-0.236, and the mass concentration (w / v) of pyrrole monomer in the mixed solution is 0.136%-1.36%. Preferably, the mass ratio of pyrrole monomer to chromic acid is 67:5.31, and the mass concentration of pyrro...

Embodiment 1

[0035] Heat and mix 0.2% (w / v) carboxymethyl cellulose solution and 4% (w / v) gelatin solution at 50° C. for 60 min to obtain a mixed solution. Add the pyrrole monomer into the mixed liquid and stir evenly, wherein the mass concentration (w / v) of the pyrrole monomer in the mixed liquid is 0.67%. Then add chromic acid according to the mass ratio of pyrrole monomer to chromic acid as 67:5.31, as an oxidant to initiate the polymerization of pyrrole monomer, and react at 20°C for 16 hours to obtain carboxymethyl cellulose / gelatin / polypyrrole hydrogel Gel (CMC / Gel / PPy). The hydrogel obtained by the reaction was first treated with NaHCO 3 The solution was eluted for about 30 minutes, and then washed several times with water to obtain the adsorbent.

[0036] The prepared adsorbent was tested for mechanical properties, and the test structure was as follows: figure 1 shown, from figure 1 It can be seen that the cross-linking of polypyrrole can more than double the mechanical propertie...

Embodiment 2

[0040] Heat and mix 0.2% (w / v) carboxymethyl cellulose solution and 4% (w / v) gelatin solution at 40° C. for 120 min to obtain a mixed solution. Add the pyrrole monomer into the mixed liquid and stir evenly, wherein the mass concentration (w / v) of the pyrrole monomer in the mixed liquid is 1.36%. Then add chromic acid according to the mass ratio of pyrrole monomer to chromic acid as 67:0.236, as an oxidant to initiate the polymerization of pyrrole monomer, and react at 30°C for 12 hours to obtain carboxymethyl cellulose / gelatin / polypyrrole hydrogel Gel (CMC / Gel / PPy). The hydrogel obtained by the reaction was first treated with NaHCO 3 The solution was eluted for about 60 minutes, and then washed several times with water to obtain the adsorbent.

[0041] Using the adsorbent obtained in this example to adsorb the 60 mg / L acid fuchsin dye solution, the adsorption capacity can reach 94% (the adsorption capacity is slightly increased compared with Example 1). After adsorption, pl...

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Abstract

The invention discloses an adsorbent, a preparation method and application thereof. The preparation method includes: mixing carboxymethyl cellulose, gelatin and a pyrrole monomer in a mass ratio of 0.2:4:0.136-1.358, then adding chromic acid for in-situ polymerization reaction, thus obtaining the adsorbent. The prepared adsorbent can be used for adsorption of acid fuchsin. The adsorbent has a unique adsorption effect on acid fuchsin, can achieve an adsorption capacity up to 90% or more, and can be recycled repeatedly with almost unchanged removal efficiency. The adsorbent has good stability; the used raw materials are all cheap and renewable biological matrix materials, the reaction conditions are mild, no additional condition is needed to promote product synthesis, the adsorbent is easy to prepare, and the production cycle is short. And the preparation raw materials are all safe and non-toxic biological matrix materials, are easily degradable, and are free of secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and in particular relates to an adsorbent, a preparation method and an application thereof. Background technique [0002] With the wide application of synthetic dyes, a large amount of printing and dyeing wastewater is generated every year. Most of the synthetic dyes are water-soluble, chemically stable and highly biochemically toxic, which can cause serious environmental problems, thereby seriously affecting aquatic organisms and humans. Therefore, there is an urgent need for a cheap, efficient and selective method to solve the problem of dye pollution. [0003] At present, there are two main methods for treating dye-contaminated water, biological treatment and physical and chemical methods. The biological treatment of dye pollutants often needs to be combined with other technologies. Compared with biological treatment, physical methods are more independent and have high efficien...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/30B01J20/26C02F1/28C02F101/30C02F101/38
CPCB01J20/22B01J20/24B01J20/262B01J20/28047C02F1/28C02F2101/308C02F2101/38
Inventor 邢建宇王峰石雄飞张泽文王紫晖杨斌申宇
Owner CHANGAN UNIV
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