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a cumn 2 o 4 /rgo composite ozone catalytic oxidation decontamination water treatment method

A technology of ozone catalytic oxidation and composite materials, applied in the direction of oxidized water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problems that restrict the wide application of graphene, and achieve the effect of inhibiting bromate The effect of generation, wide application prospect and simple preparation method

Active Publication Date: 2021-09-28
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ubiquitous dispersibility of graphene itself and its easy oxidation caused by its water non-wetting property restrict the wide application of graphene.

Method used

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  • a cumn <sub>2</sub> o <sub>4</sub> /rgo composite ozone catalytic oxidation decontamination water treatment method
  • a cumn <sub>2</sub> o <sub>4</sub> /rgo composite ozone catalytic oxidation decontamination water treatment method
  • a cumn <sub>2</sub> o <sub>4</sub> /rgo composite ozone catalytic oxidation decontamination water treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] Embodiment one kind of graphene and CuMn 2 o 4 Preparation of composite materials

[0025] Cu(NO 3 ) 2 ·3H 2 O and MnSO 4 ·H 2 Add O into the beaker according to the molar ratio of 0.9-1.1:1.9-2.1, stir at room temperature to a transparent solution, and heat to 70-90°C; Na with a concentration of 0.8-1.2mol / L 2 CO 3Add the solution dropwise to the above solution, and stop the dropwise addition when the pH=10; continue to stir in the water bath for 15-25 min, stop heating in the water bath, and let it stand for 0.8-1.2 hours to obtain a beige precipitate; use a sand core funnel to check the precipitate Perform vacuum filtration and wash with deionized water; when the pH value of the filtrate remains unchanged, wash with absolute ethanol for 3-4 times. Transfer the filter residue to a watch glass and dry it in an oven at a temperature of 100-140°C for 10-15 hours; calcinate the dried sample in a muffle furnace at a temperature of 800-1000°C for 4-8h, the heating ...

Embodiment approach 2

[0026] Embodiment 2 A kind of graphene and CuMn 2 o 4 Composites Catalytic Ozone Degradation of 2-Hydroxy-4-Methoxybenzophenone-5-sulfonic Acid (BP-4) in Water and Simultaneous Inhibition of Bromate Formation

[0027] With graphene and CuMn prepared by embodiment one 2 o 4 Composite material as catalyst for ozone degradation of 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid (BP-4). The volume of the test solution is 300mL, the initial concentration of BP-4 is 0.07-0.09mmol / L, the initial concentration of bromide ion is 80-120μg / L, the ozone concentration is 0.5-5mg / L, CuMn 2 o 4 The dosage of / rGO catalyst is 0.2-0.8g / L, the contact time is 120min, and the initial pH of the reaction system is controlled at 5-7.

[0028] Graphene and CuMn in the present embodiment 2 o 4 The composite material can catalyze ozone to efficiently degrade BP-4, and the removal rate of BP-4 can reach 100% after 15 minutes of reaction. After reacting for 2 hours, the molar concentration of br...

Embodiment approach 3

[0029] Embodiment 3: Graphene and CuMn 2 o 4 The composite catalyzed ozonation to degrade terephthalic acid (pTA) in water and simultaneously inhibited bromate formation.

[0030] Graphene and CuMn prepared in Embodiment 1 2 o 4 The composite material acts as a catalyst to catalyze the degradation of terephthalic acid (pTA) by ozone. The volume of the test solution is 300mL, the initial concentration of pTA is 0.07-0.09 mmol / L, the initial concentration of bromide ion is 80-120μg / L, the concentration of ozone is 0.5-5mg / L, CuMn 2 o 4 The dosage of / rGO catalyst is 0.2-0.8g / L, the contact time is 120min, and the initial pH of the reaction system is controlled at 5-7.

[0031] Graphene and CuMn in the present embodiment 2 o 4 The composite material can catalyze ozone to efficiently degrade pTA, and the removal rate of pTA can reach 100% after 15 minutes of reaction. After reacting for 2 hours, the molar concentration of bromate formed was lower than 10% of the initially ...

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Abstract

The invention relates to the technical field of environmental protection, and specifically discloses a graphene and CuMn 2 o 4 Application method of composite material in ozone catalytic oxidation water treatment. In the composite material, the addition of graphene significantly increases the specific surface area of ​​the composite material, which is more conducive to the transfer of electrons on the catalyst surface; CuMn 2 o 4 The addition of the compound makes the structure of the composite material more stable, reduces the cost of the catalyst and is not easy to produce secondary pollution. Graphene and CuMn synthesized by the present invention 2 o 4 In the catalytic ozone oxidation system, the composite material has a stronger ability to catalyze ozone, which can degrade refractory organic matter more efficiently; at the same time, by accelerating the conversion of ozone molecules, it can more effectively inhibit the formation of carcinogenic by-product bromate. Graphene of the present invention and CuMn 2 o 4 The combination makes the removal rate of refractory organic matters reach more than 90%, and has wide application prospects in the field of advanced treatment of drinking water or regeneration treatment of urban domestic sewage.

Description

technical field [0001] The invention relates to a preparation method of a water treatment material and an application method thereof in water treatment advanced oxidation technology, belonging to the field of ecological environment protection. Background technique [0002] With the rapid development of the global economy, the problem of water shortage has become increasingly prominent. Many rivers, reservoirs, offshore waters and groundwater are polluted to varying degrees, which greatly restricts the functions and functions of drinking water sources. Many refractory organic pollutants such as environmental hormones, persistent organic pollutants, drugs and personal care products are widely distributed in water bodies, and they have been proven to pose a great threat to human health and the safety of the ecological environment. However, traditional water treatment technologies such as coagulation-sedimentation-filtration-disinfection or biochemical treatment technologies ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C02F1/72C02F1/78C02F101/30
CPCB01J23/8892C02F1/725C02F1/78C02F2101/30
Inventor 齐飞柳晔宋子龙张钰婷刘超
Owner BEIJING FORESTRY UNIVERSITY
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