A kind of preparation method of cerium salt modified crustacean waste adsorbent

A technology for crustaceans and waste, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of low adsorption capacity, unreasonable treatment and disposal, environmental pollution, etc., and achieve improved adsorption effect, The effect of reducing treatment costs and reducing environmental pollution

Inactive Publication Date: 2018-08-17
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of my country's artificial breeding industry, the number of these crustacean wastes is increasing, and some companies dispose of them unreasonably, resulting in serious environmental pollution
However, because the functional groups such as hydroxyl and amino groups contained in this type of crustacean waste can form stable chelates with metal ions in the solution, they can be used to treat heavy metal wastewater, but their adsorption capacity is very low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Soak 50g of crab shells in 1000mL of 1mol / L HCl solution for 5 hours, then wash repeatedly with water until the pH value is 6.0, and dry them in an oven at 70°C to obtain pretreated raw materials.

[0025] (2) React the pretreated raw material at 500°C for 1.2 hours, then immerse it in a potassium hydroxide solution with a mass concentration of 50% according to the mass ratio of the pretreated raw material and potassium hydroxide at 1:2, and the immersion time is 15 hours. 3 Nitrogen was fed at a flow rate of 20°C / min, heated to a temperature of 700°C at a rate of 20°C / min, reacted for 2 hours, and the nitrogen was turned off.

[0026] (3) After the product is cooled, it is soaked in a 6% HCl solution at a mass ratio of 1:10 at 50°C and stirred continuously. After 3 hours, it is filtered and washed three times with 80°C distilled water, and finally Wash with distilled water to pH 6.5, and dry at 70°C.

[0027] (4) Under the condition of 50°C, soak the above product...

Embodiment 2

[0031] (1) Soak 50 g of soft-shelled turtle shells in 750 mL of 1 mol / L HCl solution for 6 hours, then repeatedly wash with water until the pH value is 7.0, and dry them in an oven at 65 ° C to obtain pretreated raw materials.

[0032] (2) React the pretreated raw material at 600°C for 1 hour, and then immerse it in a potassium hydroxide solution with a mass concentration of 60% according to the mass ratio of the pretreated raw material and potassium hydroxide at 1:2.5. The immersion time is 12 hours. 3 Nitrogen was fed at a flow rate of 10°C / min, heated to a temperature of 800°C at a rate of 10°C / min, reacted for 1.5 hours, and the nitrogen was turned off.

[0033] (3) After the product is cooled, soak it in a 6% HCl solution at a mass ratio of 1:20 at 60°C and keep stirring. After 2 hours, filter it, wash it with 70°C distilled water for 3 times, and finally Wash with distilled water to pH 6.8, and dry at 65°C.

[0034] (4) Under the condition of 60°C, soak the above produc...

Embodiment 3

[0038] (1) Soak 50g of shrimp shells in 1250mL of 1mol / L HCl solution for 4 hours, then repeatedly wash with water until the pH value is 6.5, and dry them in an oven at 75°C to obtain pretreated raw materials.

[0039] (2) React the pretreated raw material at 400°C for 1.5 hours, and then immerse it in the potassium hydroxide solution with a mass concentration of 80% according to the mass ratio of the pretreated raw material and potassium hydroxide at 1:3. The immersion time is 10 hours. 3 Nitrogen gas was fed at a flow rate of 15 °C / min, heated to a temperature of 750 °C at a rate of 15 °C / min, reacted for 1.8 hours, and the nitrogen gas was turned off.

[0040] (3) After the product is cooled, it is soaked in a 6% HCl solution at a mass ratio of 1:15 at 55°C and stirred continuously. After 4 hours, it is filtered and washed three times with 75°C distilled water, and finally Wash with distilled water to pH 7, and dry at 75°C.

[0041] (4) Under the condition of 40°C, soak th...

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Abstract

A preparation method of a cerium salt modified crustacean waste adsorbent includes the following steps of putting crustacean waste in an HCl solution to be soaked, and cleaning and drying crustacean waste to obtain a preprocessed raw material; secondly, soaking the preprocessed raw material in a potassium hydroxide solution, and introducing nitrogen to react for 1.5 to 2 hours at a temperature of 700-800 DEG C; thirdly, soaking the product obtained in the second step in the HCl solution after cooling, and conducting filtering, cleaning and drying; fourthly, putting the product in the third step in a cerous nitrate solution to be soaked, cooling to a room temperature, and conducting filtering to obtain solid particles; fifthly, drying and heating the solid particles, cleaning the particles with distilled water after cooling, and drying to obtain the cerium salt modified crustacean waste adsorbent. The crustacean waste adsorbent is prepared by modifying cerium salt, and the absorbent has a higher heavy metal removal rate compared with ordinary crustacean waste.

Description

technical field [0001] The invention relates to a preparation method of a crustacean waste adsorbent modified by cerium salt, and belongs to the technical field of adsorbent preparation. Background technique [0002] Water is one of the main natural resources that human beings rely on for survival. With the continuous development of industrialization, especially with the development of smelting, mining, electroplating, chemical industry, electroplating, electronics and other industries, and the unreasonable landfill and stacking of solid waste , so that various heavy metal pollutants enter the water body. Due to the enrichment of heavy metals, they are enriched in animals and plants, and accumulate in vegetables, meat, fish, and seafood, which has seriously threatened the health and safety of humans and other organisms. Survive. At present, heavy metal pollution in water has become one of the most serious environmental problems in the world, and how to scientifically and ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J2220/4881C02F1/286C02F2101/20
Inventor 孙翠珍孙彩娟赵阳张志斌陈冬辰张晓蕊邱金伟张彦浩张惠
Owner SHANDONG JIANZHU UNIV
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