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Method for preparing environment-friendly dye adsorbent from shrimp and crab shells

An environmentally friendly and adsorbent technology, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve problems such as high cost and complicated process, and achieve reduced treatment costs, simple preparation process, and improved The effect of adsorption capacity and adsorption speed

Inactive Publication Date: 2017-01-04
XIAMEN UNIV TAN KAH KEE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction of chitosan from shrimp and crab shells for sewage treatment is costly and complex.

Method used

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  • Method for preparing environment-friendly dye adsorbent from shrimp and crab shells
  • Method for preparing environment-friendly dye adsorbent from shrimp and crab shells
  • Method for preparing environment-friendly dye adsorbent from shrimp and crab shells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Clean the discarded shrimp shells with water, then dry them in the sun, break them into pieces with a size of about 1 cm, stir them in 0.0, 0.2, 0.5, 0.8, 1.0 mol / L hydrochloric acid for 2 hours, take them out and rinse them with water repeatedly until Neutral, dry in a drying oven at 60°C for 3 hours to obtain dye-absorbing materials treated with different hydrochloric acids.

[0017] Take 100 mg of the obtained dye-adsorbing material and add it to 200 mL of 10 -3 In the rhodamine B solution of M, let it stand for 5h, centrifuge, and then use spectrophotometry to detect the treated water, the results are shown in Table 1.

[0018] Table 1 Adsorption test of rhodamine B on dye-absorbing materials treated with different concentrations of hydrochloric acid

[0019]

Embodiment 2

[0021] Clean the discarded crab shells with water, then dry them in the sun, break them into pieces with a size of about 1 cm, stir them in 0.0, 0.2, 0.5, 0.8, 1.0 mol / L hydrochloric acid for 2 hours, take them out and rinse them with water repeatedly until Neutral, dry in a drying oven at 60°C for 3 hours to obtain dye-absorbing materials treated with different hydrochloric acids.

[0022] Take 100 mg of the obtained dye-adsorbing material and add it to 200 mL of 10 -3 In the reactive brilliant red solution of M, let it stand for 5h, centrifuge, then adopt the spectrophotometric method to detect the treated water, the results are shown in Table 2.

[0023] Table 2 Adsorption test of reactive brilliant red by dye-absorbing materials treated with different concentrations of hydrochloric acid

[0024]

[0025] From the above experiments, it can be found that the dye adsorption materials obtained have dye adsorption effect when the concentration of hydrochloric acid is in the...

Embodiment 3

[0028] 1. Clean the discarded shrimp and crab shells with water, then dry them in the sun, break them into pieces with a size of about 1cm, soak them in 0.5mol / L hydrochloric acid for 2-4 hours to remove calcium carbonate, take them out and rinse them repeatedly with water until Neutral, dry in a drying oven at 60°C for 3 hours to obtain the adsorption material;

[0029] 2. Measure 200 mL of 10 -3 M simulated dye wastewater (Congo red solution), which was added to a beaker with 100 mg of adsorbent material;

[0030] 3. Stir the solution in the beaker with a glass rod, and then let it stand for a while, so that the adsorption material can fully absorb the dye in the wastewater;

[0031] 4. Separation of solid and liquid to separate the adsorbent material and obtain treated water.

[0032] The treated water was detected by spectrophotometry, and the results showed that the removal rate of Congo red could reach more than 98.0%, and the obtained adsorption material with dye coul...

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Abstract

The invention discloses a method for preparing an environment-friendly dye adsorbent from shrimp and crab shells. Waste shrimp and crab shells are used as raw materials, cleaned up with water, dried in the air, crushed, soaked in hydrochloric acid, taken out, washed with water to be neutral and dried, and the dye adsorbent is obtained. The characteristic that chitin in the shrimp and crab shells and porous structures formed in the process of removal of calcium carbonate with hydrochloric acid have a good adsorption effect on dye substances is used, an efficient adsorption material is prepared from the waste shrimp and crab shells through simple treatment and mixed with dye wastewater, the removal rate of dye molecules can reach 97% or above, solid-liquid separation can be realized, and efficient, quick and low-cost treatment of the dye wastewater is facilitated.

Description

technical field [0001] The invention belongs to the technical field of adsorbent material preparation, and in particular relates to a method for preparing an environment-friendly dye adsorbent by utilizing shrimp and crab shells. Background technique [0002] With the rapid development of textile and printing and dyeing industries, the pollution caused by a large amount of wastewater discharge is also becoming more and more serious. During the printing and dyeing process, about 10% to 20% of the dyes are discharged with the wastewater, and every 1 ton of dye wastewater discharged will pollute 20 tons of water bodies, seriously polluting a large number of water sources. The printing and dyeing industrial wastewater is one of the most difficult industrial wastewater to treat due to its complex components, often containing a variety of dyes, deep chroma, strong toxicity, refractory degradation, large pH fluctuations, high concentration, and large water volume. Most dyes are to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J2220/4881C02F1/286C02F2101/308
Inventor 刘兴强刘辉峡王伟艺
Owner XIAMEN UNIV TAN KAH KEE COLLEGE
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