Method for enhancement of ozone oxidation degradation of pentachlorophenol in micro channel

A technology of pentachlorophenol and ozone oxidation, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., to achieve the effect of improving ozone utilization rate and efficient degradation

Inactive Publication Date: 2014-08-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for enhancement of ozone oxidation degradation of pentachlorophenol in micro channel
  • Method for enhancement of ozone oxidation degradation of pentachlorophenol in micro channel

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Effect test

Embodiment 1

[0061] 1) with 1) in Comparative Example 1;

[0062] 2) By diluting the standard stock solution, prepare 100 mL of pentachlorophenol with a concentration of 50 mg L -1 The solution to be treated, the prepared solution to be treated is added to the liquid storage tank for subsequent use;

[0063] 3) Turn on the power and start the power supply of the high-pressure liquid-phase cross-flow pump, use a syringe to extract the gas in the infusion pipeline until the liquid flow at the outlet of the high-pressure constant-flow pump is stable, and set the flow rate of the high-pressure cross-flow pump to 1.500mL min -1 , stop the pump;

[0064] 4) Adjust the gas flow rate to 10.00mL min -1 Turn on the power of the ozone generator and turn on the ozone generator to empty the ozone generated at the initial stage, and adjust the pre-pressure regulator until the reading of the gas-phase ozone concentration detector is 40.00 mg L -1 , adjust the three-way valve and the back pressure valv...

Embodiment 2

[0068] 1), 2) are the same as 1), 2) in Embodiment 1;

[0069] 3) Turn on the power and start the power supply of the high-pressure liquid-phase cross-flow pump, use a syringe to extract the gas in the infusion pipeline until the liquid flow at the outlet of the high-pressure constant-flow pump is stable, and set the flow rate of the high-pressure cross-flow pump to 2.452mL min -1 , stop the pump;

[0070] 4) Adjust the gas flow to 50.00mL min -1 Turn on the power of the ozone generator and turn on the ozone generator to empty the ozone generated at the initial stage, and adjust the pre-pressure regulator until the reading of the gas-phase ozone concentration detector is 30.00 mg L -1 , adjust the three-way valve and the back pressure valve, and stabilize the flow rate of the gas entering the branch of the microchannel reactor at 5.58mL min -1 ;

[0071] 5) Close the ozone vent valve, and then turn on the high-pressure liquid-phase constant-flow pump. The outlet of the gas-...

Embodiment 3

[0074] 1) with 1) in embodiment 1;

[0075] 2) By diluting the standard stock solution, prepare 100 mL of pentachlorophenol with a concentration of 20 mg L -1 The solution to be treated, the prepared solution to be treated is added to the liquid storage tank for subsequent use;

[0076] 3) Turn on the power and start the power supply of the high-pressure liquid-phase cross-flow pump, use a syringe to extract the gas in the infusion pipeline until the liquid flow at the outlet of the high-pressure constant-flow pump is stable, and set the flow rate of the high-pressure cross-flow pump to 1.608mL min -1 , stop the pump;

[0077] 4) Adjust the gas flow rate to 10.00mL min -1 Turn on the power of the ozone generator and turn on the ozone generator to empty the ozone generated at the initial stage, and adjust the pre-pressure regulator until the reading of the gas-phase ozone concentration detector is 30.00 mg L -1 , adjust the three-way valve and the back pressure valve, and st...

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Abstract

The invention relates to a method for enhancement of ozone oxidation degradation of pentachlorophenol in a micro channel, and belongs to the water treatment technology field and the novel high-efficiency chemical equipment field. The method is mainly characterized in that an inlet is T-shaped or Y-shaped, an internal cross section of a main channel is rectangular in shape, and oxidative degradation of a POPs typical pollutant PCP is carried out by utilizing O3 in a square or circular micro channel reactor. When the initial concentration range of the substrate is 5-150 mg.L<-1>, under experimental conditions that the ranges of the superficial gas velocity, the superficial liquid velocity, the reaction temperature, the reaction pressure, and the ozone adding amount (according to the molar concentration ratio of ozone to the substrate) are respectively 0.10-12.00 m/s, 0.050-2.00 m/s, 0.1-1.0 MPa, 15-30 DEG C and 1.2-4.0, the reaction system enables the removal rate of the substrate PCP to reach as high as 90%-100%.

Description

technical field [0001] The invention relates to a method for strengthening ozone oxidation to degrade pentachlorophenol, a typical persistent organic pollutant in water, in microchannel reactors with different inlet structures and different hydraulic diameters. It belongs to the technical field of water treatment. Background technique [0002] Pentachlorophenol (PCP) is an organochlorine pesticide, which has been widely used as wood preservatives, leather and paper preservatives, insecticides, etc. In 1979, USEPA listed PCP as a blacklist of priority pollutants and at the same time listed it as a suspected carcinogen. On June 24, 1998, the United States, Canada and 32 European countries officially signed the "Protocol on Persistent Organic Pollutants" under the "Convention on Long-range Transboundary Air Pollutants" in Aarhus, Denmark. The discharge of 16 kinds (types) of POPs substances, and prohibit and phase out the production of some products containing POPs. In addit...

Claims

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Application Information

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IPC IPC(8): C02F1/78C02F101/36
Inventor 孙承林任健何松波陈光文叶春波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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