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Method for removing organic dyestuff in wastewater

A technology for organic dyes and wastewater, applied in material preparation and environmental science and fields, can solve the problems of poor treatment quality, high preparation process requirements, and low adsorption efficiency.

Pending Publication Date: 2021-04-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional adsorption materials have low adsorption efficiency and poor treatment quality. The adsorbed materials are difficult to separate and recycle, and the preparation process requires high requirements.

Method used

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  • Method for removing organic dyestuff in wastewater
  • Method for removing organic dyestuff in wastewater
  • Method for removing organic dyestuff in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of magnetic adsorption material:

[0033] After heating 50 g of deionized water to 85° C., 1 g of ferrous chloride tetrahydrate and 2.5 g of ferric chloride hexahydrate were added into the deionized water, stirred and mixed evenly. Then add 5g of 25% ammonia water and 0.5g of potassium humate into the mixture, continue stirring for 1 hour, stop heating, cool to room temperature, and filter to obtain a black precipitate. The black precipitate was washed three times with water and ethanol, and dried in vacuum at 40° C. for 8 hours to obtain a magnetic dopant.

[0034] 10% polyvinyl alcohol solution, 3% sodium alginate solution, 1% magnetic dopant water dispersion solution, 5% boric acid solution and 4% calcium chloride solution were respectively prepared in mass fraction. 5% boric acid solution and 4% calcium chloride solution are mixed according to the mass ratio of 1:1 to prepare borate calcium chloride solution.

[0035] Mix 10g of 10% polyvinyl alcohol s...

Embodiment 2

[0043] Preparation of magnetic adsorption material:

[0044]After heating 75 g of deionized water to 90° C., 1.5 g of ferrous chloride tetrahydrate and 3.8 g of ferric chloride hexahydrate were added into the deionized water, and stirred and mixed evenly. Then 7.5g of 25% ammonia water and 0.75g of potassium humate were added to the mixture, and after stirring for 2 hours, the heating was stopped, cooled to room temperature, and filtered to obtain a black precipitate. The black precipitate was washed 4 times with water and ethanol, and dried in vacuum at 50° C. for 10 h to obtain a magnetic dopant.

[0045] 10% polyvinyl alcohol solution, 3% sodium alginate solution, 3% magnetic dopant water dispersion solution, 6.5% boric acid solution and 5% calcium chloride solution were prepared respectively. Then, 6.5% boric acid solution and 5% calcium chloride solution were mixed according to the mass ratio of 1:1 to prepare borate calcium chloride solution.

[0046] 15g of 10% polyvi...

Embodiment 3

[0055] Preparation of magnetic adsorption material:

[0056] After heating 100 g of deionized water to 95° C., 2 g of ferrous chloride tetrahydrate and 5.2 g of ferric chloride hexahydrate were added into the deionized water, stirred and mixed evenly. Then, 10 g of 25% ammonia water and 1 g of potassium humate were added to the mixture, and after stirring for 3 hours, the heating was stopped, cooled to room temperature, and filtered to obtain a black precipitate. The black precipitate was washed 5 times with water and ethanol, and dried in vacuum at 60° C. for 12 hours to obtain a magnetic dopant.

[0057] Prepare 10% polyvinyl alcohol solution, 3% sodium alginate solution, 5% magnetic dopant aqueous dispersion solution, 8% boric acid solution and 6% calcium chloride solution. Then, 8% boric acid solution and 6% calcium chloride were mixed according to a mass ratio of 1:1 to prepare boric acid calcium chloride solution.

[0058] 20g of 10% polyvinyl alcohol solution and 20g ...

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Abstract

The invention discloses a method for removing organic dyestuff in wastewater. The method adopts a magnetic gel ball adsorption material to adsorb the organic dyestuff in the wastewater, and removes the organic dyestuff by mixing and oscillating the magnetic adsorption material and the wastewater or enabling the wastewater to flow through an adsorption column of the magnetic adsorption material to remove the organic dyestuff in the wastewater. The magnetic adsorption material has the advantages of realization of efficient removal of organic dyes in wastewater, reduction of the pollution of the organic dyes in water, provision of a new approach for solving the problem of water pollution, realization of the easy separation and recycling of the magnetic adsorption material and recycling, and the adsorbed dye can be removed in an acid environment, the dye is enriched and recovered, the recovered dye can be reused in production after being purified, and the pollution of the dye is reduced.

Description

technical field [0001] The invention belongs to the fields of material preparation and environmental science and technology, in particular to a method for removing organic dyes in waste water. Background technique [0002] Due to the rapid development of the textile, leather and paper industries, dyes have become one of the most important pollutants causing wastewater pollution. These dye wastes are hazardous, toxic, non-biodegradable, and even carcinogenic. It can cause headaches, allergies and skin irritation in people, and even affect the normal function of the liver. In terms of quantity and output, azo dyes are the largest colorant, accounting for about 70% of all organic dyes in the world. Most of these dyes have complex and stable molecular structures, and it is difficult to remove them from wastewater by chemical and biological degradation methods. Various treatment techniques have been used to remove organic dyes, for example, flocculation, advanced oxidation, me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F1/28B01J20/26B01J20/28B01J20/30C02F101/30
CPCC02F9/00C02F1/288B01J20/267B01J20/28009B01J20/28047C02F2101/308C02F1/66C02F1/488C02F2303/16
Inventor 宋洁韩星星牛育华黄良仙孙永会韩玉英李龙赵栋
Owner SHAANXI UNIV OF SCI & TECH
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