Three-component cationic dye adsorbent and preparation method thereof

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...

Images