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Preparation method of composite fiber membrane for treating heavy metal ions in sewage

A composite fiber membrane and heavy metal ion technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of incomplete treatment, secondary pollution, frequent operation, etc., and achieve excellent heavy metal adsorption function, high permeability effect

Pending Publication Date: 2021-10-12
杭州青芒生物环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these methods deal with low-concentration (100mg / L) sewage, they have frequent operations, high operating costs, easy to form secondary pollution, and there are problems of incomplete treatment.

Method used

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  • Preparation method of composite fiber membrane for treating heavy metal ions in sewage
  • Preparation method of composite fiber membrane for treating heavy metal ions in sewage
  • Preparation method of composite fiber membrane for treating heavy metal ions in sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A preparation method for treating heavy metal ion composite fiber membranes in sewage, specifically comprising the following steps:

[0022] S1: Add graphene oxide (GO) into deionized water, then ultrasonically disperse and stir evenly, then add dopamine hydrochloride and stir, adjust the pH value to 10.5 and stir for 30 minutes, then filter, wash, and dry to obtain modified graphite alkene.

[0023] S2: Add polyvinyl alcohol (PVA) to deionized water, then heat to 80°C and stir to dissolve, then add the modified graphene in step S1, stir for 50 minutes and move to the syringe pump for later use; among them, polyethylene The mass ratio of alcohol (PVA) to the modified graphene is 0.6:0.23.

[0024] S3: Add cotton fiber to deionized water, then ultrasonically soak for 20min, add sodium hydroxide, adjust the concentration of the sodium hydroxide aqueous solution to 90mg / mL, then vibrate and stir for 2h, filter, and then wash with deionized water for 4 times , dried and s...

Embodiment 2

[0030] A preparation method for treating heavy metal ion composite fiber membranes in sewage, specifically comprising the following steps:

[0031] S1: Add graphene oxide (GO) into deionized water, then ultrasonically disperse and stir evenly, then add dopamine hydrochloride and stir, adjust the pH value to 10.8 and stir for 40 minutes, then filter, wash, and dry to obtain modified graphite alkene.

[0032] S2: Add polyvinyl alcohol (PVA) to deionized water, then heat to 80-90° C. and stir to dissolve, then add the modified graphene in step S1, stir for 60 minutes, then transfer to a syringe pump, and set aside; The mass ratio of polyvinyl alcohol (PVA) to the modified graphene is 0.7:0.29.

[0033] S3: Add cotton fiber to deionized water, then ultrasonically soak for 25 minutes, add sodium hydroxide to adjust the concentration of the sodium hydroxide aqueous solution to 100 mg / mL, then shake and stir for 3 hours, filter, and then wash with deionized water for 5 times , drie...

Embodiment 3

[0039] A preparation method for treating heavy metal ion composite fiber membranes in sewage, specifically comprising the following steps:

[0040] S1: Add graphene oxide (GO) into deionized water, then ultrasonically disperse and stir evenly, then add dopamine hydrochloride and stir, adjust the pH value to 11.3 and stir for 50 minutes, then filter, wash, and dry to obtain modified graphite alkene.

[0041] S2: Add polyvinyl alcohol (PVA) to deionized water, then heat to 85°C and stir to dissolve, then add the modified graphene in step S1, stir for 70 minutes, then transfer to the syringe pump, and set aside; the polyethylene The mass ratio of alcohol (PVA) to the modified graphene is 0.8:0.33.

[0042] S3: Add cotton fiber to deionized water, then ultrasonically soak for 30 minutes, add sodium hydroxide to adjust the concentration of the sodium hydroxide aqueous solution to 110 mg / mL, then shake and stir for 4 hours, filter, and then wash with deionized water for 6 times , ...

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Abstract

The invention discloses a preparation method of a composite fiber membrane for treating heavy metal ions in sewage, which comprises the following steps: adding graphene oxide (GO) into deionized water, ultrasonically dispersing and uniformly stirring, adding dopamine hydrochloride, stirring, adjusting the pH value, reacting, filtering, washing and drying; adding polyvinyl alcohol (PVA) into deionized water, heating to 80-90 DEG C for dissolving, adding the modified graphene, stirring, and transferring into an injection pump; adding cotton fibers into deionized water for soaking, adding sodium hydroxide, stirring, filtering, washing and drying; adding cotton fibers into a sodium periodate solution, reacting in a dark place at 50-60 DEG C, taking out, adding into glycerol, treating, washing, drying, and weaving into a cotton fiber membrane with the thickness of 0.05-0.12 mm; performing electrostatic spinning in an injection pump, receiving on the surface of cotton fiber to obtain a composite membrane, flatly laying the composite membrane on a culture dish, draining and adding deionized water, slightly swaying, adding HBP-NH2, oscillating at 55-65 DEG C, and drying to obtain the composite fiber membrane.

Description

technical field [0001] The invention belongs to the technical field of heavy metal treatment in sewage, and in particular relates to a method for preparing a composite fiber membrane for treating heavy metal ions in sewage. Background technique [0002] Because heavy metals are highly toxic and cannot be biodegraded, they can be enriched in animals and plants through the food chain, and finally stay in the environment and human body, causing serious harm to the ecological environment and human health. Since water is an important basis for human survival and development, the problem of water pollution has become an urgent problem to be solved. However, in industrial production, electroplating, mining, smelting, printing and dyeing, chemical industries and other industries discharge sewage containing a large number of heavy metal particles. It has caused huge pollution to the environment, and the heavy metal pollutants in these waters enter the human body through drinking wate...

Claims

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Application Information

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IPC IPC(8): B01D71/38B01D69/12B01D69/02B01D67/00C02F1/28C02F1/44C02F101/20
CPCB01D71/10B01D71/38B01D71/024B01D69/02B01D69/12B01D67/0079C02F1/44C02F1/288C02F2101/20
Inventor 吴铭
Owner 杭州青芒生物环保有限公司