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Method for preparing dye adsorbent from waste bricks and application of adsorbent in adsorption of dye contaminants from polluted water

An adsorbent and dye technology, applied in the field of environmental science and engineering, can solve the problems of restricting the effective use of waste bricks, low specific surface area, and limited solid loading capacity, and achieve simple equipment and processes, improved adsorption characteristics, and increased specific surface area Effect

Pending Publication Date: 2019-02-12
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, further studies have shown that the waste bricks obtained by existing modification methods have a low adsorption capacity of only a few mg / gram of pollutants, and due to the low specific surface area of ​​waste bricks (about 20m2 / g), as The loading capacity of the carrier is also greatly limited
These all limit the effective utilization of waste bricks. Therefore, in order to improve the recovery and utilization rate of waste bricks, waste bricks must be modified to increase their specific surface area, lower their isoelectric point, and increase their dye adsorption performance.

Method used

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  • Method for preparing dye adsorbent from waste bricks and application of adsorbent in adsorption of dye contaminants from polluted water
  • Method for preparing dye adsorbent from waste bricks and application of adsorbent in adsorption of dye contaminants from polluted water
  • Method for preparing dye adsorbent from waste bricks and application of adsorbent in adsorption of dye contaminants from polluted water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mechanically pulverize clay red waste bricks, and sieve powder particles with a particle size of 0.5-1.2 mm to obtain sample A;

[0027] Soak 100g of sample A in 2mol / L sulfuric acid solution for 12h, filter with suction, and wash with water until neutral.

[0028] After drying, it becomes the acid-modified waste brick dye adsorbent.

Embodiment 2

[0030] Clay red waste bricks were mechanically crushed, and the powder particles with a particle size of 0.5-1.2mm were screened to obtain sample A; 100g of sample A was soaked in 2mol / L hydrochloric acid solution for 24h, filtered with suction, washed with water until neutral, and dried at 110 ℃ drying to obtain sample B; sample B was crushed, ground, and sieved to obtain sample C with a particle size of 0.5-1.2 mm. Sample C is the acid-modified waste brick dye adsorbent.

Embodiment 3

[0032] Mechanically pulverize clay red waste bricks, screen out powder particles with a particle size of 0.5-1.2mm, and obtain sample A; soak 100g of sample A in 200ml of 0.5mol / L nitric acid solution for 36h, suction filter, and wash with water until neutral , and dried at 110°C to obtain sample B; sample B was crushed, ground, and sieved to obtain sample C with a particle size of 0.5-1.2 mm. Sample C is the acid-modified waste brick dye adsorbent.

[0033] Effect of Acid Modification of Waste Brick Particles on Adsorption Properties of Cationic and Acid Dyes

[0034] Get the adsorbent 0.3g that sample C obtains among the embodiment 1 and unmodified waste brick grain 0.3g, be placed in the centrifuge tube of the cationic dye (methylene blue) simulated waste water that 25ml mass concentration is 50mg / L respectively in 50ml In addition, get the adsorbent 0.3g obtained in sample C in Example 1 and the unmodified waste brick particles 0.3g, respectively place 50ml of acid dye (T...

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Abstract

The invention discloses a method for preparing a dye adsorbent from waste bricks and an application of the adsorbent in adsorption of dye contaminants from polluted water. The method at least comprises the step of soaking waste brick granules with an acidic solution. According to the method and the application, the specific surface area of the waste bricks treated by the method is remarkably increased, and the adsorption capacity is remarkably higher than that of unmodified waste brick powder; meanwhile, an isoelectric point of a waste brick granule raw material is lowered, and the acid-pickled waste brick granules easily show electronegativity in wastewater, so that the adsorption characteristic to cationic dyes is improved; the method has the advantages that wastes are treated with wastes, equipment and processes are simple, environmentally friendly and the like, thereby being applicable to treatment of cationic and acidic dye wastewater and having a relatively large popularization prospect.

Description

technical field [0001] The invention belongs to the field of environmental science and engineering, and specifically relates to a method for preparing a dye adsorbent from waste bricks and an application of the adsorbent to adsorb dye pollutants in polluted water. Background technique [0002] Industries such as textile printing and dyeing, papermaking, plastics, leather and metal produce a large amount of colored sewage every year, among which the treatment of textile printing and dyeing sewage is the focus and difficulty of the environmental protection industry. At present, the treatment of this kind of sewage adopts biochemical method, physicochemical method and their combination process, but the dyes in colored sewage are highly toxic and difficult to degrade, and some dyes will also produce carcinogenic and toxic substances after degradation, so we cannot rely solely on biochemical or Physicochemical and other methods, the adsorption method is a powerful supplementary m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/30
CPCB01J20/10C02F1/281C02F2101/308
Inventor 周麒麟何宇虹程寒飞
Owner HUATIAN ENG & TECH CORP MCC
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