Dye adsorbent and preparation method thereof

A technology of adsorbents and dyes, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve problems such as secondary pollution of water bodies, and achieve the effects of strong adsorption capacity, convenient raw material acquisition, and low price

Inactive Publication Date: 2017-11-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on the use of agricultural waste to adsorb wastewater is mainly focused on the treatment of heavy metal wastewater, and there are few studies on the application of its adsorption to the treatment of dye wastewater.
At the same time, when agricultural waste is used as an adsorbent to treat wastewater, because the waste itself is easily biodegradable, some soluble colored substances are often released during wastewater treatment, causing secondary pollution of the water body.

Method used

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  • Dye adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The pomelo peel powder dye adsorbent embedded in sodium alginate, its preparation method is:

[0016] (1) Pretreatment of discarded pomelo peel:

[0017] After the discarded pomelo peel was cut into pieces and soaked in a 3M NaOH solution for 30 minutes, the discarded grapefruit peel treated with the NaOH solution was obtained; then the discarded grapefruit peel treated with the NaOH solution was soaked in a 3M hydrochloric acid solution for 30 minutes; The discarded pomelo peels treated with NaOH solution and hydrochloric acid were washed several times with deionized water until the washing liquid reached neutrality. Then dry in an oven at 120° C. for 10 h, grind, and pass through a 100-mesh sieve to obtain pomelo peel powder.

[0018] (2) Embedding treatment of pomelo peel powder:

[0019] Weigh 10 g of pomelo peel powder treated in step 1) and mix with 20 mL of 2% sodium alginate solution, stir for 30 minutes until evenly mixed, then pour the mixture into 20 mL of ...

Embodiment 2

[0023] The pomelo peel powder dye adsorbent embedded in sodium alginate, its preparation method is:

[0024] (1) Pretreatment of discarded pomelo peel:

[0025] Cut the discarded pomelo peel into pieces and soak in 2M NaOH solution for 20 minutes to obtain discarded grapefruit peel treated with NaOH solution; then soak the discarded grapefruit peel treated with NaOH solution in 4M hydrochloric acid solution for 20 minutes; The discarded pomelo peels treated with NaOH solution and hydrochloric acid were washed several times with deionized water until the washing liquid reached neutrality. Then dry in an oven at 100° C. for 12 hours, grind, and pass through an 80-mesh sieve to obtain pomelo peel powder.

[0026] (2) Embedding treatment of pomelo peel powder:

[0027] Weigh 9.1g of pomelo peel powder treated in step 1) and mix with 21mL of 2% sodium alginate solution, stir for 20 minutes until uniformly mixed, then pour the mixture into 14mL of 0.1mol / L CaCl 2 solution, stirre...

Embodiment 3

[0031] The pomelo peel powder dye adsorbent embedded in sodium alginate, its preparation method is:

[0032] (1) Pretreatment of discarded pomelo peel:

[0033] Cut the discarded pomelo peel into pieces and soak in 2M hydrochloric acid solution for 20 minutes to obtain the discarded grapefruit peel treated with hydrochloric acid; then soak the discarded grapefruit peel treated with hydrochloric acid in 4M KOH solution for 20 minutes; The discarded pomelo peel treated with KOH solution was washed several times with deionized water until the washing solution reached neutrality. Then bake in an oven at 120°C for 12 hours, grind, and pass through a 100-mesh sieve to obtain pomelo peel powder.

[0034] (2) Embedding treatment of pomelo peel powder:

[0035] Weigh 10.5g of pomelo peel powder obtained by step 1) and mix it with 22.5mL of 2% sodium alginate solution, stir for 20 minutes until evenly mixed, then pour the mixture into 18mL of 0.1mol / L CaCl 2 solution, stirred for 20 ...

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Abstract

The invention provides a dye adsorbent. The dye adsorbent is sodium alginate-coated shaddock peel powder, wherein the particle size is 1-3 mm. The invention also provides a preparation method of the dye adsorbent, which comprises the following steps: mixing the shaddock peel powder processed by alkali lye and an acid solution as well as a sodium alginate solution, stirring the materials for 20-30 min, adding a CaCl2 solution, continuously stirring the materials for 20-30 min, extruding an insoluble substance in an obtained reaction mixture to obtain the small particles with the particle size of 1-3 mm, then adding the small particles into the CaCl2 solution for standing for 10-12 h, washing the particles, and drying the product to obtain the dye adsorbent. The dye adsorbent can fully use the waste materials and achieves a purpose of waste control by waste, energy saving and environmental protection, at the same time, the sodium alginate-coated shaddock peel adsorbent has the advantages of no danger and no pollution, the usage operation process is simple, the adsorption capability is strong, the cost is low, the adsorption efficiency is high when the dye waste water is processed, and the dye adsorbent has the advantages of cleaning and no pollution.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a dye adsorbent and a preparation method thereof. Background technique [0002] With the rapid development of industrial production and human society, the problem of environmental pollution has become increasingly serious. A large number of pollutants are discharged into the water environment, and a large amount of dye wastewater is discharged into the environmental water body, resulting in the pollution of natural water bodies. The dye in the dye wastewater can absorb light, reduce the transparency of the water body, consume a large amount of oxygen in the water, cause the water body to lack oxygen, affect the growth of aquatic organisms and microorganisms, destroy the self-purification of the water body, and easily cause visual pollution; and the composition of the dye is complex , is not easy to be biodegraded, can exist in the natural environment for a long time and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/30
CPCB01J20/24C02F1/286C02F2101/308
Inventor 吴云海张冰陶小明
Owner HOHAI UNIV
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