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Preparation method and using method of bromine-oxygen-bismuth photocatalytic composite material for oily sewage treatment

A composite material and sewage treatment technology, which can be applied in the fields of light water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Handling, ease of transfer, effect of prolonged action time

Inactive Publication Date: 2019-04-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the degradation of oil molecules in oily wastewater, there is a certain difficulty, because the carbon chains of oil molecules are relatively long, and compared with single-character dye molecules, their properties are more complex, and they need to be degraded from long carbon chains to short carbon chains, while conventional The bismuth oxybromide material cannot achieve this purpose
[0006] At present, the improvement of bismuth oxybromide is basically to prepare its composite material with metal compounds, such as CN108671945A, a bismuth oxybromide-silver silicate composite photocatalytic material and its application, which discloses a composite material of bismuth oxybromide and silver silicate , used to degrade phenol, methyl orange and other organic substances with relatively simple structures, not suitable for the degradation of oil pollution, and its preparation method is cumbersome, the raw material price is high, and the utilization principle of bismuth oxybromide has not yet reached the optimum

Method used

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  • Preparation method and using method of bromine-oxygen-bismuth photocatalytic composite material for oily sewage treatment
  • Preparation method and using method of bromine-oxygen-bismuth photocatalytic composite material for oily sewage treatment

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: preparation of bismuth oxybromide photocatalytic composite material

[0022] The first step, raw material solution preparation

[0023] Weigh 5g of potassium bromide and 10g of sodium metasilicate respectively, mix them and dissolve them in 1L of water, and record it as solution A; weigh 10g of bismuth nitrate and dissolve it in 1L of a solution with a volume ratio of ethanol:ethylene glycol=1:1, record Make solution B;

[0024] The second step, photocatalytic composite material preparation

[0025] Under stirring conditions, slowly drop solution B into solution A at a rate of 2ml / min. After solution B is completely dripped, let it stand for 12 hours, discard the supernatant, wash the precipitate twice with 5000ml ethanol, and then use Wash twice with 2000ml of water, filter, dry the filter residue at 110°C for 2 hours, grind, and pass through a 300-mesh sieve to obtain a bismuth oxybromide photocatalytic composite material.

[0026] figure 1 A is the ...

Embodiment 2

[0028] Embodiment 2: preparation of bismuth oxybromide photocatalytic composite material

[0029] The first step, raw material solution preparation

[0030] Weigh 15g potassium bromide and 15g sodium metasilicate respectively, mix and dissolve in 1.5L water, and record it as solution A; weigh 20g bismuth nitrate and dissolve in 1.5L of a solution with a volume ratio of ethanol:ethylene glycol=1:1 , denoted as solution B;

[0031] The second step, photocatalytic composite material preparation

[0032] Under stirring conditions, slowly drop solution B into solution A at a rate of 0.5ml / min. After solution B is completely dripped, let it stand for 15 hours, discard the supernatant, wash the precipitate twice with 1L ethanol, and then Wash twice with 4000ml of water, filter, and dry the filter residue at 105°C for 2 hours, grind, and pass through a 300-mesh sieve to obtain a bismuth oxybromide photocatalytic composite material.

Embodiment 3

[0033] Embodiment 3: preparation of bismuth oxybromide photocatalytic composite material

[0034] The first step, raw material solution preparation

[0035] Weigh 20g potassium bromide and 20g sodium metasilicate respectively, dissolve in 2L water after mixing, and record it as solution A; take 20g bismuth nitrate and dissolve it in the volume ratio of ethanol: ethylene glycol=1: 1 solution 1.5L, Denoted as solution B;

[0036] The second step, photocatalytic composite material preparation

[0037] Under stirring conditions, slowly drop solution B into solution A at a rate of 1ml / min. After solution B is completely dripped, let it stand for 15 hours, discard the supernatant, wash the precipitate twice with 1L ethanol, and then use Wash twice with 4000ml of water, filter, dry the filter residue at 110°C for 2 hours, grind, and pass through a 300-mesh sieve to obtain a bismuth oxybromide photocatalytic composite material.

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Abstract

The invention relates to a preparation method and using method of a bromine-oxygen-bismuth photocatalytic composite material for oily sewage treatment. Bismuth nitrate, potassium bromide and metasilicate are proportioned according to a certain raw material ratio, a reaction is carried out in an ethanol-ethylene glycol mixed solvent for 12-24 hours, and separating, drying and grinding are carried out, so that the bromine-oxygen-bismuth photocatalytic composite material is obtained. During use, 0.01-0.1% of the bromine-oxygen-bismuth photocatalytic composite material is added into 100-3000 mg / Lof sewage, and the sewage is stirred and exposed under sunlight for 2-5 hours, so that 93% or more of oil can be removed. The preparation method has the characteristics of easily available raw materials, simple production process and the like, and the product has a simple use method, can be recycled, and does not cause secondary pollution.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a method for preparing bismuth oxybromide photocatalyst and adsorption material for treating oily waste water and its application. Background technique [0002] With the rapid development of the economy, a large amount of oil is extracted, and leakage accidents may occur during extraction or transportation. According to incomplete statistics, globally, between 2010 and 2015, the leakage of oil tankers alone reached 33,000 tons. The occurrence of a large number of leakage incidents has exceeded the maximum carrying capacity of the environment, causing serious pollution and damage to the environment. [0003] Due to a large amount of oil spilled into the water environment, hydrocarbons have gradually become a pollutant that has received widespread attention in natural water bodies, so how to deal with and repair will become the focus of attention. Common methods for...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30C02F101/32
CPCC02F1/30B01J27/06C02F2101/322C02F2305/10B01J35/39
Inventor 郜洪文仇宏暄余义昌黎城君
Owner TONGJI UNIV
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