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Dye absorbent made of hazelnut shells

A hazelnut shell and adsorbent technology, which is applied in the field of dye adsorbent made of hazelnut shell, achieves the effects of simple process, resource utilization and low cost

Active Publication Date: 2014-03-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method and application of using hazelnut shells to prepare dye adsorbents to remove methylene blue, rhodamine B, reactive brilliant red K-2G and reactive brilliant blue KN-R in wastewater have not yet been reported.

Method used

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  • Dye absorbent made of hazelnut shells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take a certain quality of hazelnut shells, wash the hazelnut shells with tap water, dry, crush and sieve to 300-600 μm, mix and impregnate the hazelnut shell particles with a 50% concentration of zinc chloride solution, treat with 320W microwave for 20 minutes, and use The obtained hazelnut shell biochar was pickled with a 10% hydrochloric acid solution, washed with distilled water until the pH was neutral, and dried to obtain a biochar dye adsorbent made of hazelnut shells.

[0020] At 25°C, add 0.1 g of the hazelnut shell biomass charcoal dye adsorbent prepared in this example to 50 mL of 1000 mg / L methylene blue solution, and after 24 hours of adsorption, filter and separate, and adjust the filtrate to neutral before discharging.

[0021] In this example, the yield of the dye adsorbent made from hazelnut shells was 42.19%, and the methylene blue adsorption value was 436.08 mg / g. The comparison of different adsorbents to the methylene blue adsorption capacity is shown...

Embodiment 2

[0025] Take a certain quality of hazelnut shells, wash the hazelnut shells with tap water, dry, crush and sieve to 600-800 μm, mix and impregnate the hazelnut shell particles with a zinc chloride solution with a concentration of 55%, treat them with 320W microwave for 18 minutes, and use The obtained hazelnut shell biochar was pickled with a 10% hydrochloric acid solution, washed with distilled water until the pH was neutral, and dried to obtain a biochar dye adsorbent made of hazelnut shells.

[0026] At 25°C, add 0.1 g of the hazelnut shell biomass charcoal dye adsorbent prepared in this example to 50 mL of 1000 mg / L rhodamine B solution, and after 24 hours of adsorption, filter and separate, and adjust the filtrate to neutral before discharging.

[0027] In this example, the yield of hazelnut shell biomass carbon dye adsorbent was 33.85%, and the adsorption value of rhodamine B was 499.85 mg / g. The adsorption capacity comparison of different adsorbents to rhodamine B is as ...

Embodiment 3

[0031] Take a certain quality of hazelnut shells, wash the hazelnut shells with tap water, dry, crush and sieve to 800-1000 μm, then mix and impregnate the hazelnut shell particles with a zinc chloride solution with a concentration of 60%, and treat them with 480W microwave for 15 minutes. The obtained hazelnut shell biochar was pickled with a 10% hydrochloric acid solution, washed with distilled water until the pH was neutral, and dried to obtain the hazelnut shell biochar dye adsorbent.

[0032] At 25°C, add 0.1 g of the hazelnut shell biochar dye adsorbent prepared in this example to 50 mL of 1000 mg / L reactive brilliant red K-2G solution, and after 24 hours of adsorption, filter and separate, adjust the filtrate to neutral and discharge.

[0033] In this example, the yield of hazelnut shell biomass carbon dye adsorbent was 40.77%, and the adsorption value of reactive brilliant red K-2G was 141.03mg / g. The adsorption capacity comparison of different adsorbents to active bri...

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Abstract

The invention provides a dye absorbent made of hazelnut shells, and belongs to the technical field of absorbent. The preparation method of the dye absorbent comprises the following steps: washing hazelnut shells with tap water, drying, grinding, and sieving the hazelnut shells, then mixing the obtained hazelnut particles with a zinc chloride solution, soaking the hazelnut particles in the zinc chloride solution, then subjecting the hazelnut particles to a microwave treatment, and then subjecting the hazelnut particles to processes of acid washing, water washing, and drying so as to obtain the hazelnut shell biomass carbon dye absorbent. The dye absorbent can be used to remove methylene blue, rhodamine B, active bright-red K-2G, and active bright-blue KN-R in the dye wastewater. The hazelnut shell biomass carbon dye absorbent has the advantages of simple technology, low cost, and good absorbing effect.

Description

technical field [0001] The invention belongs to the technical field of dye adsorbents, in particular to a dye adsorbent made of hazelnut shells. Background technique [0002] With the rapid development of textile, leather, plastic, paper and other industries, the demand for synthetic dyes is increasing, and the resulting dye wastewater is also increasingly harmful to the environment. According to statistics, the annual output of dyes in the world is as high as 7×10 5 ~1×10 6 tons, about 10-20% of dyes are discharged into the environment during production and use. Dye wastewater has become an important source of pollution due to its complex composition, high concentration, high chroma, and large discharge. [0003] Methylene blue is a phenothiazine dye commonly used in dyeing linen, silk, and paper. It is also used as a stain for bacteria or cells in biology. It is mainly used as a disinfectant and antidote in veterinary medicine, and it has a good effect on the preventi...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58
CPCC02F1/286C02F2101/308C09B61/00
Inventor 高景峰司春英郑晓桥
Owner BEIJING UNIV OF TECH
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