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Three-component cationic dye adsorbent and preparation method thereof

A technology of cationic dyes and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as no related reports, and achieve simple operation process, high adsorption rate, and fast adsorption speed Effect

Inactive Publication Date: 2013-12-18
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current technical problem is that in the research work of using sodium alginate, chitosan and carbon nanotubes as adsorbents for printing and dyeing wastewater treatment, the preparation materials of the adsorbents are mostly selected from one of the above three materials However, there is no relevant report on the dye adsorbent prepared based on the above three materials and its use in the adsorption of cationic dyes. Therefore, in order to more effectively play the role of carbon nanotubes, sodium alginate and chitosan on cationic dyes It is necessary to provide a carbon tube / sodium alginate / chitosan three-component composite material and its preparation method that can be used for the adsorption of cationic dyes.

Method used

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  • Three-component cationic dye adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Acidification of carbon nanotubes

[0028] Accurately weigh 1.5 g of commercially purchased carbon nanotubes, place 250 ml of concentrated sulfuric acid with a concentration of 98.3% and concentrated nitric acid with a concentration of 65% (V 浓硫酸 :V 浓硝酸 =3:1), ultrasonic treatment at 70°C for 12 hours, suction filtration, washing with water until the pH of the filtrate was neutral, drying the filter cake at 60°C for 12 hours, and grinding it with an agate mortar for later use.

[0029] (2) Formulation 1.0 wt % Chitosan - 4.0 wt %Sodium alginate blend sol

[0030] Accurately weigh 2.5g of solid chitosan, place it in a 500mL three-necked flask, add 250mL of acetic acid solution with a concentration of 1% (v / v), stir mechanically at a speed of 500r / min in a water bath at 60°C until completely dissolved, and then Add 10 g of solid sodium alginate, continue mechanical stirring under the above conditions until the solution is clear and transparent, and then sonicate w...

Embodiment 2

[0040] (1) Acidification of carbon nanotubes

[0041] Accurately weigh 1.5 g of commercially purchased carbon nanotubes, place 250 ml of concentrated sulfuric acid with a concentration of 98.3% and concentrated nitric acid with a concentration of 65% (V 浓硫酸 :V 浓硝酸 =3:1), ultrasonic treatment at 70°C for 12 hours, suction filtration, washing with water until the pH of the filtrate was neutral, drying the filter cake at 60°C for 12 hours, and grinding it with an agate mortar for later use.

[0042] (2) Prepare 0.5 wt % Chitosan - 4.0 wt %Sodium alginate blend sol

[0043] Accurately weigh 1.25g solid chitosan, place in a 500mL three-necked flask, add 250mL concentration of 1% (v / v) acetic acid solution, mechanically stir at a speed of 500r / min in a 60°C water bath until completely dissolved, and then Add 10 g of solid sodium alginate, continue mechanical stirring under the above conditions until the solution is clear and transparent, and then sonicate with 100% power for 30 ...

Embodiment 3

[0053] (1) Acidification of carbon nanotubes

[0054] Accurately weigh 1.5 g of commercially purchased carbon nanotubes, place 250 ml of concentrated sulfuric acid with a concentration of 98.3% and concentrated nitric acid with a concentration of 65% (V 浓硫酸 :V 浓硝酸 =3:1), ultrasonic treatment at 70°C for 12 hours, suction filtration, washing with water until the pH of the filtrate was neutral, drying the filter cake at 60°C for 12 hours, and grinding it with an agate mortar for later use.

[0055] (2) Formulation 1.0 wt % Chitosan - 3.0 wt %Sodium alginate blend sol

[0056] Accurately weigh 2.5g of solid chitosan, place it in a 500mL three-necked flask, add 250mL of acetic acid solution with a concentration of 1% (v / v), stir mechanically at a speed of 500r / min in a water bath at 60°C until completely dissolved, and then Add 7.5 g of solid sodium alginate, continue mechanical stirring under the above conditions until the solution is clear and transparent, and then sonicate ...

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Abstract

The invention discloses a three-component cationic dye adsorbent and a preparation method thereof. The adsorbent comprises carbon nano tubes, sodium alginate and chitosan. The preparation method comprises the following steps: (1) utilizing a mixed acid solution to carry out ultrasonic treatment on the carbon nano tubes, thus obtaining water-soluble carbon tubes; (2) dissolving chitosan in a dilute acetic acid solution, then adding sodium alginate, and stirring the materials to dissolve the materials, thus obtaining sodium alginate / chitosan blending sol A; (3) dispersing the water-soluble carbon tubes in the sol A, thus obtaining carbon tube / sodium alginate / chitosan blending sol B; (4) utilizing a No.5 injection syringe to drop the blending sol B into a calcium chloride solution one by one, carrying out crosslinking to form carbon tube / sodium alginate / chitosan composite microspheres, and then drying the carbon tube / sodium alginate / chitosan composite microspheres, thus obtaining the cationic dye adsorbent. The adsorbent gives play to the triple adsorbing effects of the carbon nano tubes, sodium alginate and chitosan on dyes, so that the cationic dye adsorption rate of the adsorbent is improved, and the adsorbent can be widely used for treating wastewater containing cationic dyes. Meanwhile, the preparation method is low in equipment requirements, simple in operation process and mild in conditions, is environment-friendly and is suitable for industrial production.

Description

technical field [0001] The invention relates to a three-component cationic dye adsorbent and its preparation method, in particular to a carbon tube / sodium alginate / chitosan composite microsphere dye adsorbent and its preparation method, belonging to the dye adsorbent and its preparation technology field. Background technique [0002] Cationic dyes (such as methylene blue, crystal violet, methyl green, etc.) are an important class of chemical dyes. Due to the rich color of the dye itself and the combination of the cationic group of the dye with the acidic group of the third monomer in the fabric to dye the fiber, this type of dye has always been considered as a special dye for acrylic fiber dyeing. However, cationic dye wastewater has become one of the main harmful industrial wastewater due to the complex aromatic groups that are difficult to biodegrade and decolorize. At present, the cationic dye wastewater treatment technologies commonly used in industry include adsorptio...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F103/30
Inventor 李蛟
Owner SHANDONG UNIV OF TECH
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