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Adsorption application of modified mussel shells on methylene blue

A mussel shell and mussel shell powder technology, which is applied in the direction of adsorption water/sewage treatment, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of aggravating the difficulty of decolorization treatment of printing and dyeing wastewater, complex components, and high concentration. Achieve good dye adsorption performance, simple modification conditions, and improve the effect of adsorption

Active Publication Date: 2020-02-28
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex composition, large chroma and high concentration of printing and dyeing wastewater, there are various hydrophilic direct dyes, acid dyes and hydrophobic vat dyes, which greatly increase the difficulty of decolorization treatment of printing and dyeing wastewater.

Method used

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  • Adsorption application of modified mussel shells on methylene blue
  • Adsorption application of modified mussel shells on methylene blue
  • Adsorption application of modified mussel shells on methylene blue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of modified mussel shells, comprising the following steps:

[0033] S1. Preparation of magnetic nanoparticles: In a nitrogen atmosphere, 1g of ferric chloride hexahydrate and 2g of ferrous chloride tetrahydrate were heated up to a reaction temperature of 50°C, and then 10mL of 20wt% ammonia water was added dropwise, and reacted at a constant temperature under nitrogen protection for 2h. to room temperature, the synthesized magnetic nanoparticles were washed three times with deionized water, separated by a magnet, and set aside;

[0034] S2. Pre-treatment of mussel shells: clean the mussel shells brought back from the farm, remove the remaining shell meat, silk, and moss on the surface, dry them at 100°C, and put them into a high-temperature resistance furnace for high-temperature carbonization under nitrogen protection. Raise the temperature by 50°C every 10 minutes, up to 800°C, cool down after carbonization for 30 minutes, grind finely, and set as...

Embodiment 2

[0038] A preparation method of modified mussel shells, comprising the following steps:

[0039] S1. Preparation of magnetic nanoparticles: In a nitrogen atmosphere, 1g of ferric chloride hexahydrate and 3g of ferrous chloride tetrahydrate are heated to a reaction temperature of 60°C, and then 30mL of 24wt% ammonia water is added dropwise. to room temperature, the synthesized magnetic nanoparticles were washed three times with deionized water, separated by a magnet, and set aside;

[0040] S2. Pre-treatment of mussel shells: clean the mussel shells brought back from the farm, remove the remaining shell meat, silk, and moss on the surface, dry them at 100°C, and put them into a high-temperature resistance furnace for high-temperature carbonization under nitrogen protection. Raise the temperature by 50°C every 10 minutes, up to 800°C, cool down after carbonization for 30 minutes, grind finely, and set aside;

[0041]S3. Preparation of magnetic mussel shells: 2g of magnetic nanop...

Embodiment 3

[0044] A preparation method of modified mussel shells, comprising the following steps:

[0045] S1. Preparation of magnetic nanoparticles: 1g of ferric chloride hexahydrate and 2.5g of ferrous chloride tetrahydrate were heated to a reaction temperature of 55°C in a nitrogen atmosphere, then 20mL of 22wt% ammonia water was added dropwise, and reacted at constant temperature for 3.5h under nitrogen protection , down to room temperature, the synthesized magnetic nanoparticles were washed three times with deionized water, separated by a magnet, and set aside;

[0046] S2. Pre-treatment of mussel shells: clean the mussel shells brought back from the farm, remove the remaining shell meat, silk, and moss on the surface, dry them at 100°C, and put them into a high-temperature resistance furnace for high-temperature carbonization under nitrogen protection. Raise the temperature by 50°C every 10 minutes, up to 800°C, cool down after carbonization for 30 minutes, grind finely, and set as...

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Abstract

The invention provides a preparation method of modified mussel shells. The preparation method comprises the following steps: S1, preparing magnetic nanoparticles; S2, carrying out pretreatment of mussel shells; S3, preparing magnetic mussel shells: wherein respectively adding the magnetic nanoparticles and ammonia water into deionized water, heating to a reaction temperature, dropwise adding a silane coupling agent, adding mussel shell powder, reacting, cooling to room temperature, and carrying out magnet separation for later use; and S4, preparing the modified mussel shells: wherein adding lactic acid, a silane coupling agent and the magnetic mussel shells into deionized water, uniformly stirring, slowly dropwise adding a catalyst solution, stirring and reacting at room temperature, washing an obtained product with the deionized water and absolute ethyl alcohol for three times respectively, magnetically separating, drying and grinding to obtain the modified mussel shells. The modifiedmussel shells have good adsorption performance on methylene blue, modification conditions are simple, operation is convenient, and high operability is achieved. The waste mussel shells are used as raw materials, so that the method has good environmental benefits and can generate better economic benefits.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing sewage treatment, in particular to a modified mussel shell, a preparation method thereof and the application of methylene blue adsorption. Background technique [0002] With the rapid development of my country's printing and dyeing industry, the wastewater discharge of the printing and dyeing industry has accounted for 35% of my country's industrial wastewater discharge. Due to the complex composition, large chroma and high concentration of printing and dyeing wastewater, there are various hydrophilic direct dyes, acid dyes and hydrophobic vat dyes, which greatly increase the difficulty of decolorization treatment of printing and dyeing wastewater. At present, the methods commonly used in the industry for the treatment of printing and dyeing wastewater mainly include flocculation precipitation, oxidation, adsorption, biodegradation and other methods. Compared with other treatment meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/30B01J20/20C02F1/28C02F101/36C02F101/38
CPCB01J20/20B01J20/28007B01J20/28009B01J20/28021B01J2220/4881C02F1/283C02F2101/36C02F2101/38C02F2101/40
Inventor 刘梅陈庆国郝焱杨桥赵美璐
Owner ZHEJIANG OCEAN UNIV
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