Treatment process for degrading dye waste water by ozone catalysis

A technology of dye wastewater and treatment process, which is applied in the direction of oxidation water/sewage treatment, textile industry wastewater treatment, water/sewage treatment, etc. It can solve the problems of difficult recovery of heterogeneous catalysts, unstable treatment effect, and difficult wastewater treatment. , to achieve the effect of improving recyclability, easy control of reaction conditions, and low cost

Active Publication Date: 2018-07-06
山东志伟环保科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0009] However, there are common problems in the prior art that wastewater treatment is difficult due to large fluctuations in water quality, and the catalyst catalyzes ozone to generate free radicals at a slow speed, low efficiency, and unstable treatment effect. secondary pollution

Method used

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  • Treatment process for degrading dye waste water by ozone catalysis

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Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 The preparation of magnetic chitosan substrate

[0034] 1. Magnetic Fe 3 o 4 Preparation of nanoparticles: Preparation of Fe by chemical co-precipitation method 3 o 4 Nanoparticles: in N 2 Under protection, according to the molar ratio of 1:1.8 FeCl 2 4H 2 O and FeCl 3 ·6H 2 Dissolve O in distilled water and mix thoroughly under the action of magnetic stirring; heat the above solution to 90°C, press FeCl 2 4H 2 O and NH 3 The molar ratio of the solution is 1:10, add ammonia water dropwise therein, and react for 1h at a rotating speed of 600rpm. After the reaction is completed, it is separated by a magnet and washed repeatedly with distilled water until the solution is neutral, and then vacuum-dried to obtain an average particle size of 32nm. Magnetic Fe 3 o 4 nanoparticles.

[0035] 2. SiO2 2 encapsulated magnetic Fe 3 o 4 Preparation of nanoparticles: To avoid magnetic Fe 3 o 4 During the process of loading on chitosan, the nanoparticles ...

Embodiment 2

[0037] Example 2 Chromium-doped CeO 2 Preparation of nanorods

[0038] Weigh 0.7g Ce(NO 3 ) 3 ·6H 2 O and 6.2g NaOH were dissolved in 5mL and 35mL deionized water respectively, after mixing the two solutions, 0.15g CrCl was added to it 3 ·6H 2 O, after stirring evenly, transfer it to a 100mL hydrothermal reaction kettle, react at 100°C for 10-12h, filter after cooling, wash with absolute ethanol and deionized water three times, and dry at 60°C for 10h to obtain a yellow powder that is Cr Doped CeO 2 Nano stave.

Embodiment 3

[0039] The preparation of embodiment 3 ozone catalytic degradation dye wastewater catalyst

[0040] The Cr-doped CeO that embodiment 2 makes 2 The nanorods were dispersed in distilled water and ultrasonically dispersed into a suspension, then added to 200 mL of the chitosan base solution prepared in Example 1, ultrasonicated at 40°C for 20min, and then adjusted to a water bath temperature of 60°C and a system pH of 9 , stirred for 4h to obtain the catalyst; wherein Cr-doped CeO 2 The mass ratio of nanorods to chitosan substrate is 1:13.

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Abstract

The invention discloses a treatment process for degrading dye waste water by ozone catalysis. The treatment process is characterized in that an adopted catalyst is a chromium-doped cerium oxide nanorod magnetic catalyst; due to special nanorod structure and doped metal-chromium element of the active components, the catalyst has high-efficiency ozone-catalytic degradation activity. The treatment process disclosed by the invention has the advantages of simple operation, low cost and high degradation efficiency and the like.

Description

technical field [0001] The invention relates to a treatment process for degrading dye wastewater with a chromium-doped cerium oxide nanorod catalyst. The chromium-doped cerium oxide nanorod magnetic catalyst is used. The special nanorod structure of the catalyst active component and the doping of metal chromium make it It has high-efficiency catalytic ozone degradation activity, and the treatment process has the advantages of simple operation, low cost, and high degradation efficiency. Background technique [0002] The wastewater discharged from the printing and dyeing process is a mixture of various wastewater generated by the reprocessing of natural and man-made fiber materials in printing and dyeing factories, wool spinning factories, knitting factories, silk factories, etc. Due to the complex types of dyes, the wastewater mainly contains impurities such as dyes, pastes, additives, oils, acids and bases, fibers, and inorganic salts. Its chemical components include benzene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26C02F1/28C02F1/30C02F1/72C02F1/78C02F101/30C02F103/30
CPCB01J23/26B01J35/0033C02F1/286C02F1/30C02F1/725C02F1/78C02F2101/308C02F2103/30
Inventor 不公告发明人
Owner 山东志伟环保科技有限公司
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