Method for removing organic pollutants in water at ultrahigh speed

A technology for removing organic pollutants and water, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Affecting the oxidation activity of intermediate manganese, reducing the oxidation ability of intermediate manganese, etc., to achieve the effect of easy practical application, low price and mild conditions

Active Publication Date: 2015-05-13
TONGJI UNIV +1
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Problems solved by technology

In the 1970s, the U.S. Environmental Protection Agency detected some organic pollutants in drinking water, which made the problem of water pollution more complicated and serious.
This method only increases the rate of oxidation of pollutants by potassium permanganate by several times to ten times, mainly because the complexation of ligands and intermediate manganese will affect the oxidation activity of intermediate manganese and reduce the oxidation of intermediate manganese. ability, so that the oxidation advantage of the high activity of intermediate manganese cannot be brought into play

Method used

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  • Method for removing organic pollutants in water at ultrahigh speed
  • Method for removing organic pollutants in water at ultrahigh speed
  • Method for removing organic pollutants in water at ultrahigh speed

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Experimental program
Comparison scheme
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specific Embodiment approach 1

[0033] Specific embodiment one: the method for ultra-fast removal of organic pollutants in water in this embodiment is carried out in a complete mixing reactor, and the specific steps are as follows:

[0034] 5 μmol L -1 Add 250 μmol L of phenol to simulated surface water -1 Sodium sulfite, adjust pH=5, add 50μmol L -1 Potassium permanganate (ie: molar ratio of sulfite / potassium permanganate = 5) was added to the above simulated surface water, and it only took 80 milliseconds to achieve complete removal of phenol. When potassium permanganate was used alone, it took 4 hours to achieve complete removal of phenol. The apparent rate constant of phenol removal was increased by 422,500 times due to the addition of sodium sulfite. For specific effect comparison data, see figure 1 .

specific Embodiment approach 2

[0035] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the pH of the reaction is 7. The apparent rate constant of phenol removal was increased by 4100 times due to the addition of sulfite. For specific effect comparison data, see figure 2 .

specific Embodiment approach 3

[0036] Specific embodiment three: the difference between this embodiment and embodiment one is that the dose of sulfite is 150 μmol L -1 (ie: sulfite / potassium permanganate molar ratio = 3). The apparent rate constant of phenol removal was increased by 400,000 times due to the addition of sulfite.

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Abstract

The invention relates to a method for removing organic pollutants in water at an ultrahigh speed. The method comprises the following steps: firstly, adding a reducing agent to water to be treated; secondly, adjusting the pH value of the water to be treated to be within the range of 3-7; thirdly, adding an oxidizing agent to the water to be treated. According to the method, bisulfite radicals are utilized for reacting with potassium permanganate or manganese dioxide, the removal of the organic pollutants in the water at the ultrahigh speed is realized by quickly generating a highly active oxidizing agent Mn(III) (at a non-complexing state), the rate of removing the pollutants by potassium permanganate and manganese dioxide can be improved by one thousand to one million times and is ten thousand times higher than the apparent oxidation rate of a general advanced oxidation technology, and the degradation for the pollutants can be completed in ten seconds or several seconds. According to the method, the pollutants incapable of being oxidized by potassium permanganate and manganese dioxide can also be oxidized, and even nitrobenzene capable of being oxidized by hydroxyl radicals only in traditional meanings can be oxidized, so that the oxidizing capacity of potassium permanganate and manganese dioxide is greatly improved, and the application range of potassium permanganate and manganese dioxide is expanded.

Description

technical field [0001] The invention belongs to the technical field of water and sewage treatment, and relates to a method for ultrafast removal of organic pollutants in water, which can be applied to drinking water treatment, domestic sewage advanced treatment and industrial wastewater treatment. Background technique [0002] Water is an extremely important precious resource in nature. Human life, production and social progress and development are inseparable from water resources, and safe and high-quality water resources are more related to the comprehensive development of the country's future economy and society. With the rapid development of industry and agriculture in my country in recent years, the water environment is currently facing severe challenges and pressures in terms of resource and water quality caused by problems such as water pollution, water quality deterioration and shortage of high-quality water resources. In today's world where industrialization and glo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 关小红孙波
Owner TONGJI UNIV
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