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Printing and dyeing wastewater adsorbent and preparation method and application thereof

A technology for printing and dyeing wastewater and adsorbents, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems such as high operating costs, difficult regeneration, and limitations, and achieve low cost and good adsorption performance. , the effect of simple process

Inactive Publication Date: 2011-10-12
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although activated carbon can be regenerated by heating, etc., the difficulty of regeneration and the high operating cost limit its popularization and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of graphite oxide: 2.5g K 2 S 2 o 8 and 2.5g P 2 o 5 Add it to 12mL of concentrated sulfuric acid, then add 3g of graphite powder, stir evenly, and heat at 80°C for 4.5h. Then the mixture was cooled to room temperature, diluted with 0.5 L of deionized water and left overnight, washed to remove unreacted acid, and dried to obtain pre-oxidized graphite. Then put the pre-oxidized graphite into sulfuric acid (120mL) at 0°C, add 15g KMnO 4 Stir to keep the temperature below 20°C, stir at 35°C for 2h, dilute with 250mL of deionized water, stir for 2h, and then add 700mL of deionized water. followed by 20 mL of 30% H 2 o 2 Added to the above mixture, it can be seen that the color of the solution has become bright yellow. The resulting mixture was filtered and washed with 1 L each of 1:10 aqueous hydrochloric acid and deionized water to remove metal ions and residual acid. Dry to obtain graphite oxide.

[0021] Preparation of cyclodextrin-functionalized gr...

Embodiment 2

[0024] The preparation of graphite oxide: with embodiment 1.

[0025] Preparation of cyclodextrin-functionalized graphene: Graphite oxide was made into a 1.0 mg / mL solution, and peeled off for 50 min under the action of ultrasound (1000 W, 20% intensity) to obtain brown-yellow graphene oxide. Mix 20.0 mL of uniformly dispersed graphene oxide with 20.0 mL of 5 mg / mL β-CD aqueous solution, add concentrated ammonia water under stirring to make the pH of the solution to 10-11, and heat 25 μL of hydrazine hydrate at 80°C for 2 hours to obtain a uniform and stable Cyclodextrin functionalized graphene.

[0026] Add 1 mL of cyclodextrin-functionalized graphene nanomaterials to 10 mL of printing and dyeing wastewater containing neutral red (200 mg / L), adjust pH to 5, water temperature to 20 °C, and stir at 30-100 rpm for 5- After 10 minutes, add 0.1mL of 0.72mol / L flocculant to make all the solid matter flocculate and precipitate, let stand until the supernatant is colorless, and fina...

Embodiment 3

[0028] The preparation of graphite oxide: with embodiment 1.

[0029] Preparation of cyclodextrin-functionalized graphene: Graphite oxide was formulated into a 1.5 mg / mL solution, and peeled off for 70 min under the action of ultrasound (1000 W, 20% intensity) to obtain brown-yellow graphene oxide. Mix 20.0 mL of uniformly dispersed graphene oxide with 20.0 mL of 8 mg / mL β-CD aqueous solution, add concentrated ammonia water under stirring to make the pH of the solution to 10-11, and heat 35 μL of hydrazine hydrate at 90°C for 1 hour to obtain a uniform and stable Cyclodextrin functionalized graphene.

[0030] Add 0.5mL of cyclodextrin-functionalized graphene nanomaterials to 10mL of printing and dyeing wastewater containing Acid Scarlet G (200mg / L), adjust the pH to 6, water temperature to 13°C, and stir at a speed of 30-100 rpm for 5 -10 minutes, then add 0.08mL of 0.72mol / L flocculant to flocculate and precipitate all the solid matter, let stand until the supernatant is col...

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PUM

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Abstract

The invention discloses a printing and dyeing wastewater adsorbent, which is characterized by being a cyclodextrin functionalized graphene nanomaterial. A preparation method comprises the following steps of: treating graphite powder with strong acid and a strong oxidizer, and performing ultrasonic exfoliation to obtain graphene oxide; and adding cyclodextrin, and reducing to obtain the cyclodextrin functionalized graphene. The adsorbent is used for treating printing and dyeing wastewater, and the removal rate of dyes in the printing and dyeing wastewater is over 96 percent. The adsorbent has the advantages of readily available raw materials, low cost and simple process, and is suitable for treating the printing and dyeing wastewater generated by azo dyes, active dyes, a triphenylmethane dye, a phthalocyanine dye or an anthraquinone dye, and also can be used for treating aromatic organic chemical wastewater.

Description

technical field [0001] The invention relates to an adsorbent, in particular to an adsorbent for printing and dyeing wastewater and a preparation method thereof, and uses the adsorbent for decolorization treatment of the printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater refers to the wastewater discharged during the pretreatment, dyeing, printing and finishing processes of cotton, wool, chemical fiber and other textile products. It is estimated that the production of textile dyes in the world is more than 400,000 tons, and about 10% to 20% of the dyes are discharged as waste water during the printing and dyeing process and enter rivers, lakes, seas and ground water. At present, the discharge of printing and dyeing wastewater ranks fifth in the national industrial wastewater discharge, accounting for 80% of the textile industry wastewater discharge. One of the notable features of printing and dyeing wastewater is that the chroma of t...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 郭玉晶韩玉洁宋金萍陈一红
Owner SHANXI UNIV
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