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A treatment process for catalytic ozone degradation dye wastewater

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

Active Publication Date: 2020-09-01
苏州一清环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 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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  • A treatment process for catalytic ozone degradation dye wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 The preparation of magnetic chitosan substrate

[0035] 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.

[0036] 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

[0038] Example 2 Manganese-doped CeO 2 Preparation of nanosheets

[0039] Weigh 1.32g Ce(NO 3 ) 3 ·6H 2 O and 0.38 g of CTAB were dissolved in 40 mL of deionized water, and 8 mL of NH 3 ·H 2 O and 0.1g manganese citrate, continue to stir for 30min after forming reddish-brown floc, then transfer to a 100mL polytetrafluoroethylene-lined hydrothermal reaction kettle, keep the hydrothermal reaction at 100°C for 24h, cool to room temperature, and filter. After washing with absolute ethanol and deionized water for 3 times and drying at 100 °C for 12 h, the obtained yellow powder was 2.5 wt% manganese-doped CeO 2 Nanosheets.

Embodiment 3

[0040] The preparation of embodiment 3 catalytic ozone degradation dye wastewater catalyst

[0041] The Mn-doped CeO that embodiment 2 makes 2 The nanosheets were dispersed in distilled water and ultrasonically dispersed into a suspension, which was then added to 200 mL of the chitosan base solution prepared in Example 1, ultrasonicated at 40°C for 20min, and then the temperature of the water bath was adjusted to 60°C, and the pH of the system was 9 , stirred for 4h to obtain the catalyst; wherein the Mn-doped CeO 2 The mass ratio of nanosheets to chitosan substrate is 1:13.

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Abstract

The invention discloses a treatment process for degrading dyestuff wastewater through catalytic ozonation. The adopted catalyst is a manganese-doped cerium based magnetic chitosan catalyst. Due to a special nanosheet structure of active ingredients and doping of the metal manganese element, the catalyst has efficient catalytic ozonation degradation activity, and the treatment process has the advantages of being simple in operation, low in cost and high in degradation efficiency and the like.

Description

technical field [0001] The invention relates to a treatment process for degrading dye wastewater with a manganese-doped cerium-based catalyst. A manganese-doped cerium-based magnetic chitosan catalyst is used. The catalyst active component has a special nanosheet structure and the doping of metal manganese elements makes it have Efficient catalytic ozone degradation activity, the treatment process has the advantages of simple operation, low cost, and high degradation efficiency. Background technique [0002] The wastewater discharged from the dyeing process is a mixture of various wastewaters generated from the reprocessing of natural and man-made fiber materials in dyeing factories, wool spinning factories, knitting factories, silk factories, etc. Dye processing generally includes four processes including pretreatment (desizing, refining, bleaching, mercerizing), dyeing, printing, and finishing. The pretreatment stage (including singeing, desizing, scouring, bleaching, mer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F1/72C02F1/48C02F101/30
CPCC02F1/488C02F1/725C02F1/78C02F2101/308C02F2209/06C02F2305/08
Inventor 黄颖春刘洋其他发明人请求不公开姓名
Owner 苏州一清环保科技有限公司