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Preparation method of magnetic polypyrrole and method of adsorbing nitrate in water

A technology for polypyrrole and water adsorption, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as difficult separation, achieve stable chemical properties, good application prospects, and low cost

Inactive Publication Date: 2014-07-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These adsorbents have a good removal effect on nitrate in water, but this adsorbent has the disadvantage that it is difficult to separate from the treated water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The preparation method of magnetic polypyrrole of the present invention specifically implements according to the following steps:

[0022] Step 1, the FeCl 2 4H 2 O and FeCl 3 ·6H 2 O dissolved in 50ml of HCl solution with a concentration of 0.5moi / L, in N 2 Under protection, add dropwise to 450ml NaOH solution with a concentration of 1.0-2.0mol / L, then stir and co-precipitate at 75-85°C for 30-40min, wash with deionized water until neutral, and finally cool at 45-55°C Vacuum drying for 10-12 hours and grinding to obtain Fe 3 o 4 nanoparticles;

[0023] Among them, FeCl 2 4H 2 O and FeCl 3 ·6H 2 Fe in O 2+ with Fe 3+ The molar ratio of Fe is 1:1.5~2.5, Fe 2+ The concentration is 0.035mol / L;

[0024] Step 2, the Fe prepared in step 1 3 o 4 Nanoparticles were added to deionized water, N 2 Ultrasound for 10-15 minutes under protection, then add FeCl 3 Finally, stir mechanically for 30-40min, then add pyrrole (Ppy) and continue the mechanically stirred rea...

Embodiment 1

[0031] Magnetic polypyrrole (Fe 3 o 4 / Ppy) synthesis

[0032] Step 1, weigh 3.44g FeCl respectively 2 4H 2 O and 9.44 g FeCl 3 ·6H 2 O, add 50ml, 0.5mol / L HCl solution to dissolve, in N 2Under protection, it was added dropwise to 450ml, 1.5mol / L NaOH solution, mechanically stirred and co-precipitated at 80°C for 30min, washed with deionized water until neutral, and finally vacuum-dried at 50°C for 12h and ground to obtain Fe 3 o 4 nanoparticles;

[0033] Step 2, weigh 0.4g of Fe obtained in step 1 3 o 4 Nanoparticles, add 80ml deionized water, N 2 Ultrasound for 10min under protection, then add 6g FeCl 3 Then mechanically stir for 30min, then add 0.8ml of pyrrole and continue mechanically stirring for 3h. After the reaction, add 10ml of acetone to terminate the reaction. , get Fe 3 o 4 / Ppy.

Embodiment 2

[0035] Magnetic polypyrrole (Fe 3 o 4 / Ppy) synthesis

[0036] Step 1, weigh 3.44g FeCl respectively 2 4H 2 O and 6.89gFeCl 3 ·6H 2 O, add 50ml, 0.5mol / L HCl solution to dissolve, in N 2 Under protection, it was added dropwise to 450ml, 1.0mol / L NaOH solution, mechanically stirred and co-precipitated at 85°C for 35min, washed with deionized water until neutral, finally vacuum-dried at 45°C for 11h, and ground to obtain Fe 3 o 4 nanoparticles;

[0037] Step 2, weigh 0.4g of Fe obtained in step 1 3 o 4 Nanoparticles, add 80ml deionized water, N 2 Ultrasound for 15min under protection, then add 6g FeCl 3 Then mechanically stir for 35min, then add 0.6ml of pyrrole and continue mechanically stirring for 3.2h. After the reaction is over, add 10ml of acetone to terminate the reaction. The obtained reactant is washed several times with deionized water and acetone, and vacuum-dried at 110°C for 5.5h , ground to obtain Fe 3 o 4 / Ppy.

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Abstract

The invention discloses a preparation method of magnetic polypyrrole. The preparation method comprises the following steps: dissolving FeCl2.4H2O and FeCl3.6H2O in HCl liquor, under protection of N2, dropwise adding into NaOH liquor for stirring and co-precipitating, and then washing by deionized water until the liquor is neutral, drying in vacuum and grinding to obtain Fe3O4 nano particles; adding the Fe3O4 nano particles into deionized water, carrying out ultrasonic treatment in the presence of N2, mechanically stirring after adding FeCl3, mechanically stirring again after adding pyrrole, adding acetone to terminate the reaction after the reaction is ended, and washing reactants by deionized water and acetone for a plurality of times; and finally, drying in vacuum and grinding to obtain magnetic polypyrrole. The invention further discloses a method of adsorbing nitrate in water by magnetic polypyrrole, wherein magnetic polypyrrole is added into water for adsorbing nitrate ions in water, and a magnet is separated after adsorption saturation. According to the invention, an in-situ chemical oxidization method is utilized to synthesize a magnetic polypyrrole adsorbent, the synthetic method is simple, a removing effect is remarkable, and the adsorbent can be regenerated and recycled.

Description

technical field [0001] The invention belongs to the technical field of water body purification, and in particular relates to a preparation method of magnetic polypyrrole, and also relates to a method for using the magnetic polypyrrole to absorb nitrate in water. Background technique [0002] The safety of drinking water and the health of residents are the main issues of concern, and they are attracting more and more attention. Nitrate pollution has a serious impact on people's lives and the ecological environment. Therefore, effective control and removal of NO in water 3 - It is an important subject related to the environment and human beings, and it is necessary to seek a nitrate removal method with lower cost and better treatment effect. [0003] At present, the removal of nitrate in local groundwater is mainly solved by engineering measures, such as adding iron powder, activated carbon, microorganisms, etc. to the polluted water to degrade nitric acid into a colorless an...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/16
Inventor 王家宏田昊
Owner SHAANXI UNIV OF SCI & TECH
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