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Cetyl trimethyl ammonium bromide modified walnut shell absorbent, and preparation method and application thereof

A technology of cetyltrimethylammonium bromide and walnut shells, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve the problem of low adsorption capacity and poor adsorption capacity of azo dyes and other problems, to achieve the effects of good chemical stability, simple and easy preparation method, and abundant raw material sources

Inactive Publication Date: 2013-12-25
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are existing adsorbents modified by cationic surfactants, most of them have the disadvantage of poor adsorption capacity for azo dyes, such as Chinese patent CN201210017766.1, a modified magnetic chitosan / cationic surfactant Non-toxic zeolite adsorbent and its preparation method and application, its adsorption capacity for Congo red is only 84mg / g; patent CN201110219902.0, a preparation method and application of dye adsorbent, the dosage of the prepared biosorbent is When 15g / L, the dye decolorization rate is only 78%, that is, the prepared adsorbent has a low adsorption capacity of dye; the paper Adsorption of dye from wastewater using chitosan-CTAB modified bentonites. Alkyltrimethylammonium bromide was used to modify chitosan, but the maximum adsorption capacity of the dye weak acid scarlet was only 102.0mg / g

Method used

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  • Cetyl trimethyl ammonium bromide modified walnut shell absorbent, and preparation method and application thereof
  • Cetyl trimethyl ammonium bromide modified walnut shell absorbent, and preparation method and application thereof
  • Cetyl trimethyl ammonium bromide modified walnut shell absorbent, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0044] The preparation method of cetyltrimethylammonium bromide modified walnut shell adsorbent comprises the following steps:

[0045] Step 1, prepare walnut shell powder:

[0046] Purchase a small amount of walnuts at the local farmer’s market, remove the pulp and leave the shell, and remove the inner skin and seed coat. Boil the walnut shells in boiling water for 120 minutes to remove the remaining pulp and skin; soak them in deionized water for 7 days and replace them every day. To remove the sticky dust and residual pulp; after one week, dry it at 105°C for 24 hours, crush it with a plant sample grinder, and sieve it to get a powder with a particle size of 65-75 microns, and put it into a jar for later use;

[0047] Step 2, prepare modified liquid:

[0048] (1) Preparation of modified solution A: Dissolve 2 g of cationic surfactant cetyltrimethylammonium bromide in deionized water at 65 °C to prepare cetyltrimethylammonium bromide with a mass fraction of 1%. Ammonium br...

Embodiment 2

[0054] The preparation method of cetyltrimethylammonium bromide modified walnut shell adsorbent comprises the following steps:

[0055] Step 1, prepare walnut shell powder:

[0056] Purchase a small amount of walnuts at the local farmer’s market, remove the pulp and leave the shell, and remove the inner skin and seed coat. Boil the walnut shells in boiling water for 120 minutes to remove the remaining pulp and skin; soak them in deionized water for 7 days and replace them every day. To remove the sticky dust and residual pulp; after one week, dry it at 105°C for 48 hours, crush it with a plant sample grinder, and sieve it to get a powder with a particle size of 65-75 microns, and put it into a jar for later use;

[0057] Step 2, prepare modified liquid:

[0058] (1) Preparation of modified solution A: Dissolve 2 g of cationic surfactant cetyltrimethylammonium bromide in deionized water at 50 °C to prepare cetyltrimethylammonium bromide with a mass fraction of 1%. Ammonium br...

Embodiment 3

[0064] The preparation method of cetyltrimethylammonium bromide modified walnut shell adsorbent comprises the following steps:

[0065] Step 1, prepare walnut shell powder:

[0066] Purchase a small amount of walnuts at the local farmer’s market, remove the flesh and leave the shell, and remove the inner skin and seed coat. Boil the walnut shells in boiling water for 60 minutes to remove the remaining flesh and skin; soak them in deionized water for 10 days and replace them every day. To remove the sticky dust and residual pulp; after one week, dry it at 65°C for 24 hours, crush it with a plant sample grinder, and sieve it to get a powder with a particle size of 75-125 microns, and put it into a jar for later use;

[0067] Step 2, prepare modified liquid:

[0068] (1) Preparation of modified solution A: Dissolve 0.05 g of cationic surfactant cetyltrimethylammonium bromide in deionized water at 75 °C to prepare cetyltrimethylammonium bromide with a mass fraction of 0.05%. An ...

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Abstract

The invention relates to a cetyl trimethyl ammonium bromide modified walnut shell absorbent, and a preparation method and application thereof. The cetyl trimethyl ammonium bromide modified walnut shell absorbent is prepared by the following steps: step one, preparing walnut shell powder; step two, preparing modified liquid; step three, modifying, namely dropwise adding the modified liquid prepared in the step two into the walnut shell powder prepared in the step one, warming, stirring, transferring reaction liquid to an ultrasonic reactor to react, filtering after the reaction is finished, obtaining a cetyl trimethyl ammonium bromide modified walnut shell absorbent crude product, washing the crude product to be neutral by deionized water, drying to enable the product with constant weight, grinding, screening, and obtaining a finished product provided by the invention. The cetyl trimethyl ammonium bromide modified walnut shell absorbent has excellent adsorption capacity on azo dye reactive brilliant red K-2BP, the saturation adsorption capacity can reach up to 203.5 mg / g which is 4 to 5 times of that of unmodified walnut shells, the raw material source is abundant, low in cost and easy to regenerate, and the preparation method is simple and feasible, and has a very wide application prospect in the field of printing and dyeing wastewater treatment.

Description

technical field [0001] The invention belongs to the field of preparation of modified adsorbent materials, in particular to cetyltrimethylammonium bromide modified walnut shell adsorbent and its preparation method and application. Background technique [0002] In recent years, with the rapid development of township enterprises and the further acceleration of rural urban construction, the demand for water resources has continued to increase, but accompanied by an increase in the discharge of various domestic sewage and industrial wastewater, especially the impact of azo dyes on ecology The impact on the environment and human health is becoming more and more serious, and its corresponding treatment has become an increasingly prominent issue in environmental governance. Traditional methods for treating dye wastewater include membrane separation, flocculation, electrochemical, biological, advanced oxidation, and activated carbon adsorption. Among them, activated carbon adsorptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 操家顺林俊雄方芳胡海兰马宏伟谢玉洁周明
Owner HOHAI UNIV
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