Method for removing organic matters in water

A technology for removing organic matter and water, applied in water pollutants, chemical instruments and methods, water/sewage treatment, etc. It can solve the problem of less research on the degradation efficiency of organic pollutants, less research on dithionite, and a single activation method. and other problems, to achieve the effect of large application potential, low cost and low energy consumption

Active Publication Date: 2019-10-25
深圳市慧创源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] There are not many studies on dithionite in the field of advanced reduction, mainly including heavy metal reduction, oxo-salt reduction, etc. There are few studies on the degradation efficiency of organic pollutants
Moreover, the activation method used in the advanced reduction technology of sodium dithionite is also limited to ultraviolet activation, the activation method is single and the application is difficult

Method used

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  • Method for removing organic matters in water
  • Method for removing organic matters in water
  • Method for removing organic matters in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Degradation of tetrabromobisphenol A by activation of dithionite by iron ions

[0042] Take four brown opaque reactors, add tetrabromobisphenol A solution to it until its concentration reaches 1 μmol / L, use 0.1mol / L sulfuric acid and 0.1mol / L sodium hydroxide to adjust the pH to 7, and react in a constant temperature reaction It is carried out in a tank, the temperature is adjusted to 30°C, and the four reactors are stirred at a slow speed at the same time to ensure their uniform reaction. Reactor 1 is a blank control group, add sodium dithionite (DTN for short) solution to reactor 2 to make the concentration reach 100 μmol / L, and add ferric sulfate solution to reactor 3 to make the concentration reach 100 μmol / L , add sodium dithionite solution to reactor 4 to make the concentration reach 100 μmol / L, and add ferric sulfate solution to make the concentration reach 25 μmol / L. Take samples at 15, 30, 45, 60, and 90 minutes respectively, and use a high-performa...

Embodiment 2

[0044] Example 2: Dithionite Dosage

[0045]Take six brown opaque reactors, add tetrabromobisphenol A solution to it until its concentration reaches 1 μmol / L, use 0.1mol / L sulfuric acid and 0.1mol / L sodium hydroxide to adjust the pH to 7, and react in a constant temperature reaction It is carried out in a tank, the temperature is adjusted to 30°C, and the six reactors are stirred at a slow speed at the same time to ensure uniform reaction. Sodium dithionite (DTN for short) solution and ferric sulfate solution were added to the six reactors respectively so that the concentrations of both reached 20, 50, 100, 200, 400, 600 μmol / L. Take samples at 15, 30, 45, 60, and 90 minutes respectively, and use a high-performance liquid chromatograph to detect the residual concentration of tetrabromobisphenol A. The detection results are as follows: figure 1 shown.

[0046] Depend on figure 2 It can be seen that, in the time of 90min, along with the increase of dithionite dosage, the rem...

Embodiment 3

[0047] Embodiment 3: iron ion dosage

[0048] Take six brown opaque reactors, add tetrabromobisphenol A solution to it until its concentration reaches 1 μmol / L, use 0.1mol / L sulfuric acid and 0.1mol / L sodium hydroxide to adjust the pH to 7, and react in a constant temperature reaction It is carried out in a tank, the temperature is adjusted to 30°C, and the six reactors are stirred at a slow speed to ensure uniform reaction. Add sodium dithionite (DTN) solution to the five reactors to make the concentration reach 100 μmol / L, and add ferric sulfate solution to make the concentration reach 10, 15, 25, 50, 100, 150 μmol / L respectively. Take samples at 15, 30, 45, 60, and 90 minutes respectively, and use a high-performance liquid chromatograph to detect the residual concentration of tetrabromobisphenol A. The detection results are as follows: image 3 shown.

[0049] Depend on image 3 It can be seen that at 90 minutes, with the continuous increase of the iron ion concentration...

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Abstract

The invention discloses a method for removing organic matters in water, in particular to a method for degrading degradation-resistantorganic pollutants by using iron ions to activate dithionite. The method for degrading thedegradation-resistantorganic pollutants by using the iron ions to activate the dithionitecomprises the following steps that a water body containing the degradation-resistantorganic matters is selected,the dithionite and the iron ions are added,after temperature and the pH value are adjusted, the degradation-resistantorganic matters in the water body are treated. According tothemethod for degrading thedegradation-resistantorganic pollutants by using the iron ions to activate the dithionite,degradation-resistantorganic matters in organic wastewater can be efficiently andconveniently treated, and the method for degrading thedegradation-resistantorganic pollutants by using the iron ions to activate the dithionite has great application potential in organic wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of organic matter treatment, in particular to a method for removing organic matter in water, in particular to a method for degrading refractory organic matter by activating dithionite with iron ions. Background technique [0002] Refractory organic compounds have attracted widespread attention due to their complex and stable structures, which are difficult to remove by conventional processes. At present, the effective treatment method for refractory organic matter is advanced oxidation technology, which generates a series of highly oxidative free radicals in the system by means of activation, thereby effectively degrading refractory organic matter. However, for refractory organics such as halogenated organics, advanced oxidation technology cannot effectively dehalogenate them, making it difficult to achieve detoxification and complete degradation. In contrast, the advanced reduction technology can effective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F101/34C02F101/36C02F101/38
CPCC02F1/00C02F2101/345C02F2101/36C02F2101/38
Inventor 宋伟王卓悦
Owner 深圳市慧创源环保科技有限公司
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