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Application of activating mono-persulfate based on copper ferrite nano-powder

A technology of persulfate and copper ferrite, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor reuse effect, high cost of activator, and secondary pollution. and other problems, to achieve the effect of good magnetic separation effect, easy recovery and regeneration, and high utilization rate

Inactive Publication Date: 2018-07-31
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem to be solved: In order to solve the problems of high cost, poor recycling effect and secondary pollution of the existing activator for activating monopersulfate, the present invention provides an application based on nano-copper ferrite to activate monopersulfate

Method used

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  • Application of activating mono-persulfate based on copper ferrite nano-powder
  • Application of activating mono-persulfate based on copper ferrite nano-powder
  • Application of activating mono-persulfate based on copper ferrite nano-powder

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Embodiment 1

[0030] A method for activating monopersulfate to degrade persistent organic pollution based on nano-copper ferrite is completed in the following steps: 1. The preparation method of nano-copper ferrite:

[0031] Weigh 6.04 grams of Cu(NO 3 ) 2 ·3H 2 O and 20.2 g Fe(NO 3 ) 3 9H 2 Dissolve O together in 100mL deionized water, Cu(NO 3 ) 2 ·3H 2 O and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 1:2, stir evenly, then add 75mL4.0mol / L sodium hydroxide solution dropwise, stir evenly, reflux and stir for 2h under the condition of 90℃ water bath; cool to room temperature and centrifuge to obtain solid precipitate, use deionized Wash with water for several times until the pH value is constant, then vacuum-dry at 70°C to obtain a dark brown solid, transfer the solid to a crucible, place it in a muffle furnace and bake it at 600°C for 2 hours, the heating rate of the muffle furnace is 1-1.2°C / min; cool the roasted dark brown solid to room temperature, grind the solid thoroughly an...

Embodiment 2

[0058] The difference between the present embodiment and embodiment 1 is that the amount of sodium peroxymonosulfate added in step 3 is different. Other steps are identical with embodiment 1.

[0059] Specifically, in the heterogeneous activation reaction using nano-copper ferrite to activate monopersulfate, a glass bottle with a polytetrafluoroethylene stopper is used as the reaction vessel, the reaction solution is 20 mL, and the initial concentration of nano-copper ferrite is 0.1 g / L, the concentration of PCBs is 0.5mg / L, and the content of sodium peroxymonosulfate is 0.1-0.5mmol / L. The reaction bottle is placed in a vibrating bed with a rotation speed of 150rpm and a temperature of 25°C. The processing time is 8h, and the processing results are shown in figure 2 . With the increase of the amount of sodium persulfate, the degradation rate of PCBs also increases, increasing the amount of oxidant can effectively increase the degradation rate of PCBs, such as when the amoun...

Embodiment 3

[0061] The difference between this embodiment and embodiment 1 is that the amount of the activator nano-copper ferrite in step 2 is different. Other steps are identical with embodiment 1.

[0062] Specifically, in the heterogeneous activation reaction using nano-copper ferrite to activate monopersulfate, a glass bottle with a polytetrafluoroethylene stopper is used as the reaction vessel, the reaction solution is 20 mL, and the initial concentration of sodium peroxymonosulfate is 0.2mmol / L, the concentration of PCBs is 0.5mg / L, and the content of nano-copper ferrite is 0.05-1.0g / L. The reaction bottle is placed in a vibrating bed with a rotation speed of 150rpm and a temperature of 25°C. The processing time is 8h, and the processing results are shown in image 3 . With the increase of the amount of activator nano-copper ferrite, the degradation rate of PCBs showed a trend of increasing and then decreasing. When the concentration of nano-copper ferrite increased from 0.05g / L ...

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Abstract

The invention discloses application of activating mono-persulfate based on copper ferrite nano-powder. Nanometer copper ferrite particles are put into a solution containing persistent organic pollutants, then, mono-persulfate is put to perform a reaction, after the reaction is ended, and a magnetic separation method is performed for recycling an activating agent. Compared with other activating systems, such as metal ions (Fe2+ / Cu2+) or nanometer copper oxide, the adopted nanometer copper ferrite is higher in activating efficiency, the mono-persulfate can be efficiently and continuously activated for generating sulfate radials and hydroxyl radicals, and the purpose of degrading the persistent organic pollutants is achieved.

Description

technical field [0001] The invention belongs to the field of persistent organic pollutants treatment, and in particular relates to a method for degrading persistent organic pollutants based on nano-copper ferrite activating monopersulfate. Background technique [0002] Persistent organic pollutants (POPs) have attracted increasing attention due to their high toxicity, bioaccumulation, environmental persistence and long-distance transport. The water environment is one of the main places where POPs gather, and most waters in the world are polluted by POPs to varying degrees. The elimination technologies of POPs mainly include physical methods, chemical methods and bioremediation methods. The physical method is to remove POPs by means of adsorption, distillation, extraction and stripping. This method is costly and relatively simple to operate, but it is mainly the transfer of pollutants and does not fundamentally solve the pollution problem. Therefore, this method is not worth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F9/12C02F101/30
CPCC02F1/48C02F1/725C02F2101/30
Inventor 秦文秀王玉军方国东朱长银周东美
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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