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Adsorbing agent capable of selectively removing dyes containing sulfonic acid groups in wastewater and method of adsorbing agent

A technology of sulfonic acid groups and adsorbents, which is applied in the field of adsorbents for selectively removing dyes containing sulfonic acid groups in wastewater, achieving the effects of simple operation, low cost and high efficiency

Inactive Publication Date: 2016-04-20
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is worth noting that it has good adsorption effect on methylene blue, methyl orange and Congo red and has selective adsorption on mixed dyes (mixture of methyl orange and methylene blue, mixture of Congo red and methylene blue) Adsorbents have not been reported

Method used

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  • Adsorbing agent capable of selectively removing dyes containing sulfonic acid groups in wastewater and method of adsorbing agent
  • Adsorbing agent capable of selectively removing dyes containing sulfonic acid groups in wastewater and method of adsorbing agent
  • Adsorbing agent capable of selectively removing dyes containing sulfonic acid groups in wastewater and method of adsorbing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the preparation of the basic copper nitrate of nanosheet

[0020] Weigh 2 mmol of copper nitrate trihydrate and dissolve in 30 mL of distilled water, slowly add 30 mL of NaOH (0.1 mol / L) aqueous solution dropwise to the copper nitrate aqueous solution, and stir magnetically for 10 min to obtain a blue suspension. The suspension was ultrasonicated for 45 min in an ultrasonic field with a frequency of 20 kHz and a power of 600 W. After the reaction was finished, it was naturally cooled to room temperature, and the sample was centrifuged three times with distilled water and ethanol (7000 / min), respectively, and finally the obtained product was dried in a vacuum oven at 60°C for 12 hours to obtain a blue powder.

[0021] figure 1 It is the XRD pattern of the product prepared in Example 1. It can be seen that all of the products can be indexed as a monoclinic Cu 2 (OH) 3 NO 3 (JCPDSNo.45-0594), the corresponding lattice parameters a=5.6132, b=6.0986, ...

Embodiment 2

[0023] Embodiment 2: the basic copper nitrate adsorption methylene blue, Congo red, methyl orange of nano sheet

[0024] Prepare 500mg / L methylene blue solution, dilute to 50mg / L, 100mg / L, 150mg / L, 200mg / L, 250mg / L, 300mg / L, 400mg / L respectively, weigh 10mg of nano flake basic nitric acid Put copper into 50mL of the above methylene blue solutions of different concentrations, stir in the dark for 12h, take 10mL of the suspension and centrifuge, and measure the supernatant with a UV-Vis spectrophotometer at 200-800nm.

[0025] Prepare 500mg / L Congo red solution, dilute to 50mg / L, 100mg / L, 150mg / L, 200mg / L, 250mg / L, 300mg / L, 400mg / L respectively, weigh 10mg of nano flake basic copper nitrate Put it into 50mL of the above-mentioned Congo red solutions of different concentrations, stir in the dark for 12h, take 10mL of the suspension and centrifuge, and measure the supernatant with a UV-Vis spectrophotometer at 200-800nm.

[0026] Prepare 500mg / L methyl orange solution, dilute to ...

Embodiment 3

[0028] Example 3: Nanosheet-shaped basic copper nitrate selectively adsorbs dyes containing sulfonic acid groups

[0029] Prepare 10mg / L methyl orange, Congo red, and methylene blue three different dye solutions, 50mL each, weigh 10mg nano-flake basic copper nitrate and put it into the three different dye solutions, stir in the dark for 2h, take 10mL The suspension was centrifuged, and the supernatant was measured with a UV-Vis spectrophotometer at 200-800nm.

[0030]Prepare 50 mL of a mixed solution of 10 mg / L Congo red and 10 mg / L methylene blue, weigh 10 mg of nano-flaky basic copper nitrate and put it into the mixed solution, stir in the dark for 2 hours, then take 10 mL of the suspension and centrifuge to separate the supernatant Measurements were made between 200-800 nm with a UV-Vis spectrophotometer.

[0031] Prepare 50 mL of a mixed solution of 10 mg / L methyl orange and 10 mg / L methylene blue, weigh 10 mg of nano-flaky basic copper nitrate and put it into the mixed s...

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Abstract

The invention discloses an adsorbing agent capable of selectively removing dyes containing sulfonic acid groups in wastewater and a method of the adsorbing agent. Nanometer flake basic copper nitrate is used as the adsorbing agent to remove the dyes containing the sulfonic acid groups in the wastewater. The adsorbing agent can be put into a single dye (Congo red or methyl blue or methyl orange) solution containing sulfonic acid groups, and the adsorbing agent can also be put into a mixed solution of Congo red and methyl blue and a mixed solution of methyl orange and methyl blue. It is shown through results that the adsorbing agent achieves a very high adsorbing quantity on the dyes containing the sulfonic acid groups and can selectively adsorb the dyes containing the sulfonic acid groups.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing sewage treatment, and in particular relates to an adsorbent for selectively removing dyes containing sulfonic acid groups in waste water and a method thereof. Background technique [0002] Methyl blue, methyl orange, and Congo red are all dyes containing sulfonic acid groups, which are often used in textile, paper, paint, leather and other industries. During the production process, a large amount of industrial wastewater will be generated, and dyes also It has become the main component of industrial wastewater. Due to the complex and stable structure of dye molecules containing sulfonic acid groups, it is difficult to degrade under natural conditions. At present, the methods used to remove dyes in wastewater mainly include ozonation, oxidation, chemical coagulation / flocculation, cloud point extraction, photocatalysis, ion exchange, forward osmosis, and adsorption. Among them, the adso...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/02B01J20/28B01J20/30C02F101/34
CPCB01J20/0296B01J20/28033B01J2220/4812C02F1/281C02F2101/34
Inventor 牛和林王红红陈京帅毛昌杰宋吉明张胜义
Owner ANHUI UNIVERSITY
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