Preparation method of nickel-aluminum hydrotalcite capable of adsorbing Congo red in dye wastewater

A nickel-aluminum hydrotalcite, dye adsorption technology, applied in the direction of adsorption water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of carcinogenicity and damage to unborn babies, etc., to increase the adsorption performance and increase the surface area Effect of polarity, good adsorption performance

Inactive Publication Date: 2015-01-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Congo red contained in dye wastewater has the risk of causing cancer and harming unborn babies, so exploring an effective and economical treatment method for adsorbing Congo red in dye wastewater is of great significance to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] First, weigh 0.009mol of nickel phosphate and 0.003mol of aluminum nitrate and dilute them in 80mL of anhydrous ethanol solution containing 0.04mol of urea, stir at room temperature for 1h; The temperature can reach room temperature; remove ions with ethanol and wash with water for several times, and dry at 60°C for 6 hours; calcinate the obtained sample in a boiling furnace at 500°C for 2 hours, and the heating rate is 2°C / min; after calcination Add 0.1 mol / L sodium dodecylbenzenesulfonate and soak in ethanol acetate solution for 12 hours; after soaking, dry in a constant temperature furnace at a temperature of 105°C to obtain nickel-aluminum hydrotalcite.

[0026] To treat the wastewater effluent from a dye factory, 10L of dye wastewater was firstly taken for testing, and its chroma was measured to be 15 and its pH to be 10. The dye wastewater was put into a container, and then the nickel-aluminum hydrotalcite was wrapped three layers with gauze and placed in the conta...

example 2

[0028] First, weigh 0.009mol nickel phosphate and 0.003mol aluminum nitrate and dilute them in 80mL of absolute ethanol solution containing 0.04mol urea, stir at room temperature for 1h; The temperature can reach room temperature; remove ions with ethanol and wash with water for several times, and dry at 60°C for 7 hours; calcinate the obtained sample in a boiling furnace at 550°C for 3 hours, and the heating rate is 2°C / min; after calcining Add 0.3 mol / L sodium dodecylbenzenesulfonate and soak in ethanol acetate solution for 18 hours; after soaking, dry in a constant temperature furnace at a temperature of 105°C to obtain nickel-aluminum hydrotalcite.

[0029] To treat the wastewater effluent from a dye factory, 15L of dye wastewater was firstly taken for testing, and its chroma was 17 and its pH was 12. The dye wastewater was put into a container, and then the nickel-aluminum hydrotalcite was wrapped three layers with gauze and placed in the container. Put it into a vessel c...

example 3

[0031] First, weigh 0.009mol of nickel phosphate and 0.003mol of aluminum nitrate and dilute them in 80mL of anhydrous ethanol solution containing 0.04mol of urea, stir at room temperature for 1h; The temperature can reach room temperature; remove ions with ethanol and wash with water several times, and dry at 60°C for 8 hours; calcinate the obtained sample in a boiling furnace at 600°C for 4 hours, and the heating rate is 2°C / min; after calcination Add 0.5 mol / L sodium dodecylbenzenesulfonate and soak in ethanol acetate solution for 24 hours; after soaking, dry in a constant temperature furnace at a temperature of 105°C to obtain nickel-aluminum hydrotalcite.

[0032] To treat the wastewater effluent from a dye factory, 20L of dye wastewater was firstly taken for testing, and its chroma was measured to be 20 and its pH to be 15. The dye wastewater was put into a container, and then the nickel-aluminum hydrotalcite was wrapped three layers with gauze and placed in the container...

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Abstract

The invention discloses a preparation method of nickel-aluminum hydrotalcite capable of adsorbing Congo red in dye wastewater. The preparation method of the nickel-aluminum hydrotalcite capable of adsorbing Congo red in the dye wastewater comprises the following steps: firstly weighing 0.009mol of nickel phosphate and 0.003mol of aluminium nitrate, diluting the nickel phosphate and the aluminium nitrate in 80mL of absolute ethyl alcohol solution containing 0.04mol of carbamide, stirring at the room temperature for one hour, performing hydrothermal reaction, then reacting at 100 DEG C for 12 hours, cooling the solution to the room temperature, removing ions by ethyl alcohol and washing, and drying at 60 DEG C for 6 hours; calcining the solution at 500 DEG C for 2 hours in a boiling furnace, then adding sodium dodecyl benzene sulfonate and soaking in acetic acid alcohol solution for 12 hours; and then putting the solution in a constant-temperature furnace, and drying at 105 DEG C, and thus obtaining the nickel-aluminum hydrotalcite. An application of the nickel-aluminum hydrotalcite comprises the following steps: taking 10L of dye wastewater, detecting the dye wastewater to obtain a chromaticity of 15 and a pH value of 10, adding the dye wastewater in a vessel, then wrapping the nickel-aluminum hydrotalcite with gauze, putting the nickel-aluminum hydrotalcite in the vessel, stirring for 2 minutes, then precipitating for 3 minutes. Through detection, chromaticity of the wastewater after adsorption is 5, the pH value is 7 and the adsorption rate for Congo red in dye wastewater is greater than 95%.

Description

technical field [0001] The invention relates to a method for preparing Congo red nickel-aluminum hydrotalcite in adsorbed dye wastewater, belonging to the field of environmental protection. Background technique [0002] The development of the textile industry has led to the development of dye production. The survey shows that the annual production of dyes in the world exceeds 700,000 tons, of which 2% are directly discharged into the water body and discharged in the form of wastewater. The dye wastewater has complex components, large changes in water quality, deep chroma, The concentration is high and the treatment is difficult, especially the dye wastewater contains a large amount of Congo red. [0003] Congo red, chemical name: sodium diphenyl-4,4'-bis(azo-2-)-1-aminonaphthalene-4-sulfonate, molecular formula C32H22N6Na2O6S2, brown-red powder, soluble in water and turns yellow Red, orange when soluble in alcohol. Used as an acid-base indicator, the color change range is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/38C02F103/30
CPCB01J20/08C02F1/281C02F2101/308C02F2101/34C02F2101/38C02F2101/40
Inventor 徐炜
Owner CHANGZHOU UNIV
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