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Treatment method of organic dye in waste water

A treatment method and technology of organic dyes, applied in water/sewage treatment, adsorption water/sewage treatment, light water/sewage treatment, etc., can solve the problem of poor adsorption capacity, low photocatalytic degradation rate of organic dyes, and poor regeneration ability of adsorption materials and other problems, to achieve the effect of reducing energy gap difference, realizing repeated use, and easy regeneration

Inactive Publication Date: 2019-08-30
ZHONGSU NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The titanium dioxide-graphene composite sponge prepared by this method has poor adsorption capacity for organic dyes in wastewater, low photocatalytic degradation rate of organic dyes in the adsorption material, and poor regeneration ability of the adsorption material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022]

[0023] The sponge is soaked in the graphene oxide suspoemulsion to obtain the graphene oxide composite sponge; the graphene oxide composite sponge is placed in the mixed solution of nano-scale photocatalyst and reducing agent to obtain the photocatalyst modified graphene composite sponge hydrogel ; Washing and drying the photocatalyst-modified graphene composite sponge hydrogel to prepare the photocatalyst-modified graphene composite sponge.

[0024] In the present invention, the sponge may be one of polyurethane sponge, melamine sponge, polyester sponge, polyether sponge or polyvinyl alcohol sponge. Preferably, the sponge is polyurethane sponge or melamine sponge. According to a specific embodiment of the present invention, the sponge is a polyurethane sponge. The volume of the sponge is 20-500cm 3 . Preferably, the volume of the sponge is 100-400cm 3 . More preferably, the volume of the sponge is 150 to 300 cm 3 . The shape of the sponge can be cuboid or cu...

Embodiment 1

[0046] A polyurethane sponge with a volume of 10cm×10cm×2cm was ultrasonically cleaned in absolute ethanol, and then ultrasonically cleaned in deionized water. The polyurethane sponge after ultrasonic cleaning was soaked and washed in distilled water, and dried at 65°C. Soak the dried polyurethane sponge in a graphene oxide suspoemulsion with a concentration of 2 mg / ml, squeeze and soak for several times, take it out and centrifuge to obtain a graphene oxide composite sponge. The graphene oxide composite sponge was placed in a mixed solution of nano-titanium dioxide and ascorbic acid (the concentration of nano-titanium dioxide was 0.2mg / ml, and the concentration of ascorbic acid was 5mg / ml), and reacted at 80°C for 12h to obtain photocatalytically modified graphene Composite Sponge Hydrogel. The photocatalytically modified graphene composite sponge hydrogel was soaked and washed with 1vol% ethanol aqueous solution for 24h, and dried at 65°C for 10h to obtain a photocatalyst-m...

Embodiment 2

[0050] A polyurethane sponge with a volume of 10cm×10cm×2cm was ultrasonically cleaned in absolute ethanol, and then ultrasonically cleaned in deionized water. The polyurethane sponge after ultrasonic cleaning was soaked and washed in distilled water, and dried at 65°C. Soak the dried polyurethane sponge in a graphene oxide suspoemulsion with a concentration of 4 mg / ml, squeeze and soak for several times, take it out and centrifuge to obtain a graphene oxide composite sponge. The graphene oxide composite sponge was placed in a mixed solution of nano-titanium dioxide and ascorbic acid (the concentration of nano-titanium dioxide was 0.2mg / ml, and the concentration of ascorbic acid was 5mg / ml), and reacted at 80°C for 12h to obtain photocatalytically modified graphene Composite Sponge Hydrogel. The photocatalytically modified graphene composite sponge hydrogel was soaked and washed with 1vol% ethanol aqueous solution for 24h, and dried at 65°C for 10h to obtain a photocatalyst-m...

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Abstract

The invention discloses a treatment method of organic dye in waste water. The method comprises the following steps: (1) soaking a sponge in graphene oxide suspension emulsion to obtain a graphene oxide composite sponge; placing the graphene oxide composite sponge in mixed liquid of a nanoscale photocatalyst and a reducing agent to obtain photocatalyst-modified graphene composite sponge hydrogel; washing and drying the photocatalyst-modified graphene composite sponge hydrogel to obtain a photocatalyst-modified graphene composite sponge; (2) enabling the waste water containing the organic dye topass through an adsorption reactor loaded with the photocatalyst-modified graphene composite sponge to adsorb the organic dye in the waste water; (3) taking out the photocatalyst-modified graphene composite sponge after adsorption and saturation, and performing catalytic decomposition on the organic dye under illumination to obtain a regenerated photocatalyst-modified graphene composite sponge. The method can effectively adsorb the organic dye in the waste water, and an adsorbent material used is easy to regenerate.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating organic dyes in waste water. Background technique [0002] Graphene oxide is the precursor of graphene prepared by redox method. It not only has the structural characteristics of graphene, but also has oxygen-containing functional groups such as hydroxyl and carboxyl on the surface. It has good water solubility and high specific surface area. The polar functional groups in the compound are easy to form strong interactions with some molecules, which is beneficial to compound with other materials. [0003] CN108997608A discloses a preparation method of graphene hydrophobic oil-absorbing sponge: preparation of graphene oxide suspension; polyurethane sponge is ultrasonically washed with ethanol and pure water respectively; hydrazine hydrate reducing agent and clean polyurethane sponge are added to graphene oxide suspension , placed in a microwave chemical re...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/30C02F101/30
CPCC02F1/288C02F1/30C02F2101/308C02F2303/16
Inventor 童裳慧
Owner ZHONGSU NEW TECH CO LTD
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