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Preparation and application of a composite membrane for removing metal ions in wastewater, composite membrane

A metal ion, composite membrane technology, applied in the directions of alkali metal compounds, alkali metal oxides/hydroxides, adsorbed water/sewage treatment, etc., can solve the problem of ineffective ion exchange, avoid recycling difficulties, and facilitate recycling. Use, do not produce the effect of secondary pollution

Active Publication Date: 2019-09-17
SHENZHEN INST OF ADVANCED TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the selectivity of ion exchange resins, this method has certain pertinence and is not effective for all ion exchanges, so it is limited to a certain extent in practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Dissolve 0.3g polymethylmethacrylate (PMMA molecular weight is 450,000) in 5mL chloroform solution, stir until clear and transparent, add 0.001g polyaniline PAN (molecular weight: 20,000) and 0.03g pyrrole, stir well , add 0.02 grams of 10mol / L sulfuric acid to the above mixture, adjust the stirrer speed to 100rpm, and stir for 20 minutes, then drop the mixed liquid on a flat glass, and let it stand for 5 hours to form a film with a thickness of about 0.1mm. Soak the prepared composite film in distilled water for 3 hours, take it out, wash it with distilled water for 3 times, and dry it in an oven at 40°C to obtain the desired composite film. will be 12cm 2 The membrane was placed in a 200ml solution containing 800mg / L of divalent copper ions for 5 hours. After the composite membrane was taken out, the concentration of divalent copper ions in the solution became 90 mg / L, and the removal rate reached 89%.

Embodiment 2

[0041] Dissolve 0.3 g of polymethyl methacrylate (PMMA molecular weight is 400,000) in 3 mL of chloroform solution, stir until clear and transparent, add 0.03 g of 12 mol / L sulfuric acid to the above mixture, adjust the stirrer speed to 100 rpm, And stir for 20 minutes, add 0.002 gram of polyaniline PAN (molecular weight: 30,000) and 0.04 gram of pyrrole, continue to stir for 15 minutes, then drop the mixed clear liquid on the flat glass sheet, and let it stand for 8 hours to form a thick layer of about 0.20 mm. membrane. Soak the prepared composite film in distilled water for 3 hours, take it out, wash it with distilled water three times, and dry it in an oven at 50°C to obtain the desired composite film. will be 12cm 2 The membrane was placed in a 200ml solution containing 800mg / L of divalent copper ions for 10 hours. After the composite membrane was taken out, the concentration of divalent copper ions in the solution became 62mg / L, and the removal rate reached 92%.

Embodiment 3

[0043]Dissolve 0.3g polymethyl methacrylate (PMMA molecular weight: 200,000) in 1.5mL chloroform solution, stir until clear and transparent, add 0.001g polyaniline PAN (molecular weight: 30,000) and 0.03g pyrrole, stir well Finally, add 0.02 grams of 8mol / L sulfuric acid to the above mixture, adjust the stirrer speed to 200rpm, and stir for 20 minutes, then drop the mixed clear liquid on a flat glass sheet, and let it stand for 5 hours to form a film with a thickness of about 0.4mm. . Soak the prepared composite film in distilled water for 3 hours, take it out, wash it with distilled water for 3 times, and dry it in an oven at 45°C to obtain the desired composite film. will be 12cm 2 The film was placed in a 200ml solution containing 800mg / L of ferric ions for 8 hours. After the composite membrane was taken out, the concentration of ferric ions in the solution became 87mg / L, and the removal rate reached 81%.

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PUM

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Abstract

The invention relates to the technical field of functional materials, and in particular to a composite membrane for removing metal ions in wastewater and preparation and application of the composite membrane. The composite membrane comprises polyaniline, pyrrole and a functional high polymer material; the mass sum of the polyaniline and the pyrrole accounts for 5-20% of the mass of the functional high polymer material. The preparation of the composite membrane comprises steps of dissolving the functional high polymer material, preparing a mixed solution, spreading to form a membrane, and performing aftertreatment. As Py is uniformly dispersed on the composite membrane, the composite membrane provided by the invention is simple in preparation process and convenient to operate, is used for removing metal ions in wastewater, is easy to recycle and circulate, and is free of secondary pollution.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a composite membrane for removing metal ions in wastewater, preparation and application of the composite membrane. Background technique [0002] As we all know, heavy metal ions are a class of pollutants that are extremely harmful to the ecological environment. Different from the pollution of organic compounds, for most organic compounds, their harmfulness can be reduced or removed through natural physical, chemical or biological purification, while heavy metals are a kind of long-lasting toxic and biologically rich. Intensive pollutants; and some heavy metals can be converted into more toxic pollutants under the action of microorganisms as long as they are in trace concentrations. For example, inorganic mercury can be transformed into more toxic methylmercury by microorganisms in natural water bodies. With the country's emphasis on ecological environment protectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 张玲苗晶唐浩林江志彬涂凯李曦峰方省众陈顺权牛青山
Owner SHENZHEN INST OF ADVANCED TECH
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