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Method for removing acid orange II from aqueous solution

An acid orange and aqueous solution technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problem of difficult removal of acid orange II, and achieve the effects of high adsorption capacity, high amino density and simple method.

Inactive Publication Date: 2019-01-04
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is in order to solve the problem that acid orange II is difficult to remove, and a kind of method is provided simple, and the method for removing acid orange II from aqueous solution that step is easy to operate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of polyethyleneimine emulsion: Put 8mL polyethyleneimine aqueous solution with a mass percentage concentration of 20%, 12 mL liquid paraffin and 0.04 g / mL surfactant in a 40 mL corked bottle, and then add 2 mL of polyvinyl alcohol 400 was stirred with an XHF-D high-speed disperser at a speed of 3000 rpm for 2 min to form a polyethyleneimine emulsion, and the mass ratio of Span-80 to Tween-80 in the mixed surfactant was 6 : 1, the molecular weight of polyethyleneimine is 20000 g / mol, and the pH value of polyethyleneimine aqueous solution is adjusted to 7.0 with 1 mol / L hydrochloric acid solution;

[0020] (2) Take 15 mL of the above-mentioned polyethyleneimine emulsion, slowly add 15 mL of dialdehyde solution with a mass percentage of 20% under the condition of magnetic stirring, the dropping speed is 0.2 mL / min, and the dropping reaction time is 15 hours. After the end, the supernatant was removed by centrifugation to obtain polyethyleneimine microsphere...

Embodiment 2

[0024] (1) Put 8 mL of 20% polyethyleneimine aqueous solution, 12 mL of liquid paraffin, 3 mL of polyvinyl alcohol 1000 and 0.05 g / mL of mixed surfactant in a 40 mL stoppered bottle. The mass ratio of Span-80 to Tween-80 in the mixed surfactant is 6:1. The molecular weight of polyethyleneimine is 30000 g / mol. The pH value of the polyethyleneimine aqueous solution was adjusted to 8.0 with 1 mol / L hydrochloric acid solution, and the polyethyleneimine emulsion was formed after stirring the mixture at a speed of 3000 rpm for 2 min with an XHF-D high-speed disperser;

[0025] (2) Put 20 mL of the polyethyleneimine emulsion prepared in step 1 into a 100 mL flask, and slowly add 15 mL of glutaraldehyde solution with a mass percent concentration of 25% under magnetic stirring conditions at a rate of 0.2 mL / min, centrifuge after 15 hours of reaction, remove the supernatant, and collect polyethyleneimine microspheres. Microsphere products were washed several times with isopropanol, an...

Embodiment 3

[0029] (1) Put 8 mL of 18% polyethyleneimine aqueous solution, 12 mL of liquid paraffin, 4 mL of polyvinyl alcohol 2000 and 0.06 g / mL of mixed surfactant in a 40 mL stoppered bottle. The mass ratio of Span-80 to Tween-80 in the mixed surfactant is 6:1. The molecular weight of polyethyleneimine is 50000 g / mol. The pH value of the polyethyleneimine aqueous solution was adjusted to 9.0 with 1 mol / L hydrochloric acid solution, and the polyethyleneimine emulsion was formed after stirring the mixture at a speed of 3000rmp for 2 min with an XHF-D high-speed disperser;

[0030] (2) Put 20 mL of the polyethyleneimine emulsion prepared in step 1 into a 100 mL flask, and slowly add 15 mL of suberaldehyde solution with a mass percent concentration of 20% under magnetic stirring conditions at a rate of 0.2 mL / min, centrifuge after 15 hours of reaction, remove the supernatant, collect polyethyleneimine microspheres, and wash the microspheres with isopropanol, anhydrous ether and deionized ...

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PUM

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Abstract

The invention relates to a method for removing acid orange II from an aqueous solution. The method comprises the following steps: 0.1 g of polyethyleneimine microspheres are added to 10 mL of an acidorange II solution with mass fraction being 10-15 g / L; the mixed solution is oscillated and mixed for 3-6 h at 25-45 DEG C and centrifuged for 8-12 min, a supernatant is collected, absorbance of the solution at 486 nm is detected with spectrophotometry, concentration of the acid orange II in the solution before and after adsorption is calculated according to the relation curve of the acid orange II concentration and the absorbance, and the maximum acid orange II absorption quantity of the polyethyleneimine microspheres is obtained through concentration change and reaches 1.186 g / g. The methodis simple, the steps are easy to operate, the polyethyleneimine microspheres are used as an adsorbent to remove acid orange II dye from the aqueous solution, compared with a polyethyleneimine supported material, the polyethyleneimine microspheres formed by cross-linking polymerization of emulsion have high amino density and stable material property, separation of a support layer is avoided, and the acid orange II absorption quantity of the polyethyleneimine microspheres is substantially higher than that of a support material.

Description

technical field [0001] The invention relates to a method for removing acid orange II from an aqueous solution, and belongs to the technical field of material preparation. Background technique [0002] Industrial wastewater discharged from textile, printing and dyeing industries contains a large amount of synthetic dyes, dyeing auxiliaries, acids and bases, and some heavy metals. Among them, residual dyes and auxiliaries constitute the main components of organic pollutants in dye wastewater, and make the wastewater have a special color. [0003] Acid Orange II is an azo dye used in the dyeing of various knitwear, textiles and silk, and its direct discharge into water will cause serious water pollution. There are various treatment methods for acid orange II wastewater, mainly including coagulation method, electrochemical method, biological oxidation method, oxidation method (such as chemical oxidation, photocatalytic method, microwave method), adsorption method, etc. Each of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/26B01J20/28B01J20/30C02F101/30
CPCB01J20/267B01J20/28021B01J20/3064C02F1/285C02F2101/308
Inventor 黄登发汪晓萌张文婷刘锦帅张楚峰许文杰王峰
Owner JIANGNAN UNIV
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