Method for processing degradation-resistant organic pollutants in water

A technology for organic pollutants and water treatment, applied in the field of water treatment, can solve problems such as limiting the reaction rate of the activated persulfate system, and achieve the effects of easier control of the reaction process, improved removal rate, and improved reaction rate.

Inactive Publication Date: 2013-10-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since in Fe 0 Activated persulfate system, Fe 0 The main role is as Fe 2+ donor, while Fe 0 Corrosion produces Fe 2+ requires a process, thus limiting the Fe 0 Reaction rate of activated persulfate system

Method used

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  • Method for processing degradation-resistant organic pollutants in water
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  • Method for processing degradation-resistant organic pollutants in water

Examples

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Embodiment 1

[0031] A method of treating refractory organic pollutants in water using a weak magnetic field / ZVI synergistically activated persulfate advanced oxidation technology in this embodiment, the specific steps are:

[0032] (1) Arrange a weak magnetic field around the reactor, the weak magnetic field used is a permanent magnet weak magnetic field, and the magnetic field strength is about 15-50mT. In the complete mixing reactor, the initial concentration of the printing and dyeing wastewater golden orange G is 200μM, adjust the initial pH value 3.0~10.0;

[0033] (2) First add 2mM sodium persulfate to the above printing and dyeing wastewater, and then add 2mM zero-valent iron to start the reaction. see results figure 1 . Depend on figure 1 It can be seen that in a wide pH range (3.0-10.0), the zero-valent iron / sodium persulfate system is feasible for the removal of golden orange G, and the existence of a weak magnetic field can greatly increase the reaction rate and shorten the r...

Embodiment 2

[0041] A method of treating refractory organic pollutants in water using a weak magnetic field / ZVI synergistically activated persulfate advanced oxidation technology in this embodiment comprises the following steps:

[0042] (1) A weak magnetic field is arranged around the reactor, the weak magnetic field used is a weak electromagnetic field, and the magnetic field strength is about 5-30mT; in the complete mixing reactor, the initial concentration of reactive blue 4 in printing and dyeing wastewater is 200μM, and the initial pH value is adjusted to 5.0;

[0043] (2) Simultaneously add 2mM sodium persulfate and 2mM zero-valent iron to the above printing and dyeing wastewater to start the reaction. In the presence of a weak magnetic field, the removal rate of reactive blue 4 by zero-valent iron / sodium persulfate reached 80% within 30 minutes; while in the absence of a weak magnetic field, the removal rate of reactive blue 4 was only 31% within 120 minutes. see results figure 2...

Embodiment 3

[0046] A method of treating refractory organic pollutants in water using a weak magnetic field / ZVI synergistically activated persulfate advanced oxidation technology in this embodiment comprises the following steps:

[0047] (1) A weak magnetic field is arranged around the reactor, the weak magnetic field used is a weak electromagnetic field, and the magnetic field strength is about 15-40mT; in the complete mixing reactor, the initial concentration of the refractory trace organic caffeine is 10μM, and the initial pH value is 7.0;

[0048] (2) Simultaneously add 1mM sodium persulfate and 1mM zero-valent iron to the above-mentioned treated water to start the reaction. In the presence of a weak magnetic field, the removal rate of caffeine by zero-valent iron / sodium persulfate reached 100% within 10 minutes; while in the absence of a weak magnetic field, it took 50 minutes to completely remove caffeine. see results image 3 .

[0049] Depend on image 3 It can be seen that the ...

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Abstract

The invention belongs to the technical field of water treatment, and relates to a method for processing degradation-resistant organic pollutants in water by an advanced oxidizing technology that a weak magnetic field / ZVI (Zero Valent Iron) are cooperated to activate peroxysulphate. The method comprises the following steps of: (1) arranging the weak magnetic field around a reactor, and adjusting the initial pH of water to be treated; and (2) casting zero valent iron to the water to be treated, promoting zero valent iron to quickly and continuously release ferrous iron to activate peroxysulphate by the weak magnetic field, oxidizing the target pollutants by free sulfate radicals generated in the reaction process, and after reaction for a period of time, purifying the water to be treated. The method can efficiently remove degradation-resistant organic water and industrial wastewater, so that the reaction time is greatly shortened, the treatment cost is lowered, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a method for treating refractory organic pollutants in water using a weak magnetic field / ZVI synergistically activated persulfate advanced oxidation technology. Background technique [0002] With the rapid development of industry, the number and types of organic matter entering water bodies have increased sharply, resulting in serious pollution of water resources. Conventional water treatment processes can no longer meet the needs of drinking water safety. For those wastewater containing highly toxic and refractory organic matter, traditional biological treatment can no longer meet the treatment requirements, and other treatment methods have to be considered. [0003] Advanced Oxidation Processes (AOPs) is a new technology developed in the 1980s for the treatment of refractory organic pollutants. It can directly mineralize pollutants or improve the biodegradability of sewa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/48
Inventor 关小红熊心美乔俊莲周恭明
Owner TONGJI UNIV
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