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Diaminobenzenesulfonate polymerization modification polymer materials -PAN Hg ion sorbent and the preparing method

A technology of diaminobenzenesulfonic acid and sodium diaminobenzenesulfonate, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve the problems of low cost performance, high cost of raw materials, and complex synthesis procedures, etc. problem, to achieve the effect of simple process, low requirements for production equipment and large adsorption capacity

Inactive Publication Date: 2007-09-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although artificially synthesized adsorbents have excellent adsorption properties, such adsorbents have disadvantages such as complex synthesis procedures and high raw material costs, so they are generally not cost-effective.

Method used

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  • Diaminobenzenesulfonate polymerization modification polymer materials -PAN Hg ion sorbent and the preparing method
  • Diaminobenzenesulfonate polymerization modification polymer materials -PAN Hg ion sorbent and the preparing method
  • Diaminobenzenesulfonate polymerization modification polymer materials -PAN Hg ion sorbent and the preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0033] Embodiment 1~3: prepare AN / SDB copolyaniline

[0034] Accurately take AN monomer 0.054mol (4.92mL, i.e. 5.022g) and SDB monomer 0.006 mol (1.26g) was placed in a 250mL dry and clean beaker, added 150mL 1.0mol / L hydrochloric acid, stirred at 25°C for 0.5h until completely dissolved, and a colorless solution was obtained; the molar ratio of ammonium persulfate / monomer was 1 / 1 , weighed 0.06mol (13.68g) (NH 4 ) 2 S 2 o 8 Dissolve in 50mL of 1.0mol / L hydrochloric acid, stir in a water bath for 0.5h until completely dissolved. Add dropwise (NH 4 ) 2 S 2 o 8 solution into the above monomer mixture. After the dropwise addition, the reaction was continued for 24h. After the reaction was completed, filter and wash several times with distilled water until the 2 Solution test clear solution without SO 4 2- ion until (generally 1000mL of water is used). The product was transferred to a Petri dish and dried at 40° C. for one week to obtain dark green doped PANSDB copol...

Embodiment 4

[0037] Take 50mg of AN / SDB copolymer with a molar ratio of 8:2, put it into 25mL of mercuric nitrate solution with an initial concentration of 5.00mmol / L at 30°C and stir for 24 hours. After filtering with filter paper, titrate the mercury in the filtrate by volumetric analysis. Ion content, the results show that under this condition, the adsorption rate is about 97.4%, and the adsorption capacity is 495.7mg / g.

[0038] Under the same adsorption conditions, the adsorption rate of AN / SDB copolymer with a molar ratio of 7:3 is about 98.3%, and the adsorption capacity is 497.7mg / g.

Embodiment 5

[0040] Take 50 mg of AN / SDB copolymer with a molar ratio of 9:1 and put it into 25 mL of mercuric nitrate solution with an initial concentration of 0.10 mmol / L at 30°C and stir for 24 hours. After filtering with filter paper, analyze the mercury ions in the filtrate with a mercury detector. The results show that the residual mercury ion concentration after adsorption under this condition is 1.75ppb. The adsorption rate is 99.99%, and the adsorption capacity is 9.99mg / g.

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Abstract

The invention discloses a new mercury ion absorbent. The diaminobenzene sulfonate copolymerization modified polyaniline mercury ion absorbent in the invention is obtained by chemical oxidation copolymerization of aniline and 2,4-diaminobenzene sulfonate sodium. The invention uses diaminobenzene sulfonate copolymerization modified polyaniline to obtain copolymerization polyaniline particles by chemical oxidation so that sulfonic group with chelating function and ion exchange function is imported on polyaniline main chain and at the same time the content of amino functional group is added in polyaniline. So the absorbent has a good absorption performance for mercury ion; the absorption ability of polyaniline to waste liquid with mercury is improved greatly; it is ten times of saturation absorption capability of activated carbon. In addition, the preparation of absorbent is provided with high synthetic productivity rate, simple and easy process, low demand for producing equipment, and rapid extension so on.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to the use of diaminobenzenesulfonic acid copolymerized modified polyaniline as a mercury ion adsorbent. Background technique [0002] Mercury is widely distributed in nature. Almost all minerals contain mercury. Mercury is one of the indispensable substances for industrial production and scientific research. However, mercury is one of the most harmful elements to humans and higher organisms. Water-soluble inorganic mercury compounds are easily absorbed by the intestinal tract, such as mercuric chloride (mercuric dichloride), which is very toxic, and inorganic mercury passes through Biomethylation produces more toxic methylmercury, which is absorbed by plants and enters the human body through the enrichment of the food chain, and its enrichment factor can be as high as 10 6 ~10 7 . Mercury pollution emitted by human factors is the main cause of global me...

Claims

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Application Information

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IPC IPC(8): B01J20/26C08G73/02C02F1/28C02F1/62C08G75/24
Inventor 黄美荣窦强李新贵
Owner TONGJI UNIV
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