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Polyaniline-iron attapulgite composite material and synthesis and application method thereof

A technology of attapulgite and composite materials, applied in chemical instruments and methods, water treatment of special compounds, water/sludge/sewage treatment, etc., can solve the problem that ferrous iron cannot be reused and the degradation efficiency of atrazine is low , low utilization rate of Fenton's reagent, etc., to achieve the effect of repeated utilization, environmental friendliness and easy settlement

Active Publication Date: 2016-09-21
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the low utilization rate of Fenton reagent in the existing Fenton sum-like reactions, the inability to reuse ferrous iron, the low degradation efficiency of atrazine, and the difficulty in processing, the invention provides a polyaniline-iron The attapulgite composite material and its synthesis method and application method, using attapulgite saturated with ferric iron ions as a template, in-situ synthesis of polyaniline, a conductive material, through high-temperature and high-pressure treatment of p-aniline in the pores of attapulgite, adding under acidic conditions Hydrogen peroxide degrades atrazine, acidic conditions are conducive to triggering Fenton and Fenton-like reactions and can realize the doping of polyaniline to have conductivity

Method used

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  • Polyaniline-iron attapulgite composite material and synthesis and application method thereof
  • Polyaniline-iron attapulgite composite material and synthesis and application method thereof
  • Polyaniline-iron attapulgite composite material and synthesis and application method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The synthesis is used for the characterization of the material of degrading organic pesticide atrazine, and its steps are:

[0055](1) Put sodium attapulgite (purchased from Xuyi Xinyuan Technology Co., Ltd., the total cation exchange capacity of attapulgite is 250-300mmol / kg) in 0.1mol / L FeCl 3 Stir in the solution for 8 hours, so that the iron ions replace the sodium ions in the pores of attapulgite, and obtain the clay that absorbs iron ions in the pores; then centrifuge to discard the supernatant, and place the precipitate in 0.1mol / L FeCl 3 solution, so repeated 6 times to get Fe as reported in the literature 3+ Saturated iron attapulgite. After washing the clay with ultrapure water to the supernatant with AgNO 3 The solution was detected without precipitation. Freeze-dried to obtain loaded Fe 3+ iron attapulgite.

[0056] (2) dry iron attapulgite (0.5g) and aniline (60mg) are placed in a high-temperature and high-pressure reactor (the placement method is: fir...

Embodiment 2

[0059] The synthesis is used for the characterization of the material of degrading organic pesticide atrazine, and its steps are:

[0060] (1) Put sodium attapulgite (purchased from Xuyi Xinyuan Technology Co., Ltd., the total cation exchange capacity of attapulgite is 250-300mmol / kg) in 0.1mol / L FeCl 3 Stir in the solution for 8 hours, so that the iron ions replace the sodium ions in the pores of attapulgite, and obtain the clay that absorbs iron ions in the pores; then centrifuge to discard the supernatant, and place the precipitate in 0.1mol / L FeCl 3 solution, so repeated 6 times to get Fe as reported in the literature 3+ Saturated iron attapulgite. After washing the clay with ultrapure water to the supernatant with AgNO 3 The solution was detected without precipitation. Freeze-dried to obtain loaded Fe 3+ iron attapulgite.

[0061] (2) dry iron attapulgite (0.5g) and aniline (60mg) are placed in a high-temperature and high-pressure reactor (the placement method is: fi...

Embodiment 3

[0064] The synthesis is used for the characterization of the material of degrading organic pesticide atrazine, and its steps are:

[0065] (1) Put sodium attapulgite (purchased from Xuyi Xinyuan Technology Co., Ltd., the total cation exchange capacity of attapulgite is 250-300mmol / kg) in 0.1mol / L FeCl 3 Stir in the solution for 8 hours, so that the iron ions replace the sodium ions in the pores of attapulgite, and obtain the clay that absorbs iron ions in the pores; then centrifuge to discard the supernatant, and place the precipitate in 0.1mol / L FeCl 3 solution, so repeated 6 times to get Fe as reported in the literature 3+ Saturated iron attapulgite. After washing the clay with ultrapure water to the supernatant with AgNO 3 The solution was detected without precipitation. Freeze-dried to obtain loaded Fe 3+ iron attapulgite.

[0066] (2) dry iron attapulgite (0.5g) and aniline (60mg) are placed in a high-temperature and high-pressure reactor (the placement method is: fi...

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Abstract

The invention discloses a polyaniline-iron attapulgite composite material and a synthesis and application method thereof, and belongs to the field of durable pollutant degradation. A new method for synthesizing the conducting material polyaniline is provided, and the problems that existing ferrous ion saturated attapulgite is prone to oxidization, and Fenton-like reaction for degrading atrazine is low in speed are solved. Ferric ion saturated attapulgite is used as a template, aniline is processed at high temperature and pressure in attapulgite pores to synthesize the conducting material polyaniline in situ, and hydrogen peroxide is added on the acid condition to degrade atrazine. The acid condition is beneficial for triggering Fenton and Fenton-like reactions and capable of achieving doping of polyaniline so that polyaniline can have conductivity. The synthesized material can fast degrade atrazine and stably exist in air and water solutions.

Description

technical field [0001] The invention belongs to the field of persistent organic pollutant degradation, and more specifically relates to a polyaniline-iron attapulgite composite material and its synthesis method and application method. Background technique [0002] Currently, the Fenton reaction is the most effective and mature advanced oxidation technology for the removal of toxic and harmful organic pollutants in wastewater. Fenton's reagent has a strong oxidizing property, and the oxidizing property is not selective, so it can adapt to the treatment of various wastewater. However, the large amount of ferric iron precipitated by the separation and processing reaction still limits the practical application of Fenton's reagent. Therefore, research on the reusability, economy, and avoidance of ferric iron precipitation has attracted widespread attention. Because polyaniline has easy synthesis, stable environment and simple doping-dedoping chemical properties, it has been wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C02F1/72
CPCC02F1/722C02F1/725C08G73/0266C02F2305/026C02F2101/306C02F2101/38C02F2101/36Y02P20/582
Inventor 谷成王超
Owner NANJING UNIV
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