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Method for purifying humic acid pollutants in water by utilizing polyaniline

A technology for polyaniline and pollutants, which is applied in the field of purifying humic acid pollutants in water by using polyaniline, can solve problems such as unsatisfactory adsorption effect, and achieve the effects of good economic and environmental benefits, low cost and simple operation.

Inactive Publication Date: 2012-05-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon adsorbent mainly uses the porous structure of activated carbon itself to separate the adsorbate through physical adsorption; resin adsorbent mainly uses its own porous structure and ion exchange to realize the adsorption process; inorganic mineral adsorbents vary with the type There are also large differences in structure, mainly through its own physical structure and functional groups in the modification process to achieve adsorption, and the general adsorption effect is not very ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The polyaniline as adsorbent can be synthesized by the method in the prior art, and the present embodiment is specifically synthesized by chemical oxidation method:

[0020] Dissolve 0.11mmol of aniline in 300ml of 1mol / L hydrochloric acid to prepare aniline hydrochloric acid solution, and cool to 0°C, dissolve 25g (0.11mol) of ammonium persulfate in 200mL of 1mol / L hydrochloric acid to prepare ammonium persulfate hydrochloric acid Solution, and cooled to 0 ° C; under ice bath conditions, ammonium persulfate solution was added to the aniline solution while stirring, and reacted for 2 hours under nitrogen protection. After the reaction is completed, filter, wash the precipitate, and dry the precipitate naturally to obtain polyaniline.

[0021] PAN was used as an adsorbent to treat polluted water with an initial humic acid concentration of 50mg / L. In order to facilitate the calculation of the removal rate, put the humic acid-contaminated water in a closed container, add ...

Embodiment 2

[0023] Chemical oxidation synthesis of polyaniline:

[0024] Dissolve 0.02mmol of aniline in 200ml of 1mol / L hydrochloric acid to prepare aniline hydrochloric acid solution, and cool to 0°C, dissolve 9.1g (0.04mol) of ammonium persulfate in 200mL of 1mol / L hydrochloric acid to prepare ammonium persulfate Hydrochloric acid solution, and cooled to 0 ° C; under ice bath conditions, ammonium persulfate solution was added to the aniline solution while stirring, and reacted for 3 hours under nitrogen protection. After the reaction is completed, filter, wash the precipitate, and dry the precipitate naturally to obtain polyaniline.

[0025] PAN was used as an adsorbent to treat polluted water with an initial humic acid concentration of 100mg / L. In order to facilitate the calculation of the removal rate, put the humic acid-contaminated water in a closed container, add polyaniline 0.001 times the quality of the polluted water, and adjust the pH of the polluted water to 5.30. It is 18h...

Embodiment 3

[0027] Chemical oxidation synthesis of polyaniline:

[0028] Dissolve 0.1mmol of aniline in 200ml of 1mol / L hydrochloric acid to prepare aniline hydrochloric acid solution, and cool to 0°C, dissolve 18.2g (0.2mol) of ammonium persulfate in 200mL of 1mol / L hydrochloric acid to prepare ammonium persulfate Hydrochloric acid solution, and cooled to 0 ° C; under ice bath conditions, ammonium persulfate solution was added to the aniline solution while stirring, and reacted for 2.5 hours under nitrogen protection. After the reaction is completed, filter, wash the precipitate, and dry the precipitate naturally to obtain polyaniline.

[0029] PAN was used as an adsorbent to treat polluted water with an initial humic acid concentration of 10mg / L. In order to facilitate the calculation of the removal rate, put the humic acid-contaminated water in a closed container, add polyaniline 0.0002 times the quality of the polluted water, and adjust the pH of the polluted water to 5.30, 35 ° C co...

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Abstract

The invention discloses a method for purifying humic acid pollutants in water by utilizing polyaniline, which comprises the following steps of: adding the adsorbent polyaniline in an amount which accounts for 0.02 to 0.1 percent of the mass of water into the water to be purified; adsorbing the humic acid pollutants in the water at the temperature of between 15 and 35 DEG C and the pH of between 3.0 and 9.0 for 0.5 to 24 hours by using the polyaniline; and collecting the polyaniline and purifying the humic acid pollutants in the water. The polyaniline is taken as the adsorbent, has the adsorption performance obviously superior to that of the traditional adsorbing materials, and has the maximum adsorption capacity of 126.58mg / g; and the method has the advantages of simple operation and low cost.

Description

technical field [0001] The invention belongs to the technical field of water body purification and treatment, and relates to the purification of humic acid in water, in particular to a method for purifying humic acid pollutants in water by using polyaniline. Background technique [0002] Humic acid is a macromolecular polycyclic aromatic compound containing various functional groups such as phenolic hydroxyl, carboxyl, and alcoholic hydroxyl. It is mainly produced by the decomposition of animals and plants in nature, and widely exists in natural water bodies and soils. Humic acid substances are the main components of natural organic matter in water, accounting for about 50% to 90% of the total organic matter in water. The presence of humic acids in water can cause various environmental and health problems. The existence of humic acid substances in the water body is the main cause of the color and odor of the water body; humic acid molecules can complex with heavy metal ions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/48C02F101/30
Inventor 王家宏郑长乐丁绍兰韦绒绒王伟伟
Owner SHAANXI UNIV OF SCI & TECH
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