Potassium ferrate-photocatalysis oxidation method and apparatus

A technology of photocatalytic oxidation and potassium ferrate, which is applied in the direction of oxidized water/sewage treatment, illuminated water/sewage treatment, etc., can solve the problems of low efficiency of photocatalytic oxidation method, and achieve simple installation, small size and fast reaction rate Effect

Inactive Publication Date: 2008-10-29
TONGJI UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for potassium ferrate-photocatalytic oxidation synergistic reaction, to overcome the high selectivity of the simple potassium ferrate oxidation method and the low efficiency of the simple photocatalytic oxidation method

Method used

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  • Potassium ferrate-photocatalysis oxidation method and apparatus
  • Potassium ferrate-photocatalysis oxidation method and apparatus
  • Potassium ferrate-photocatalysis oxidation method and apparatus

Examples

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specific example 1

[0033] A near-ultraviolet lamp with a power of 6W and a main emission wavelength of 365nm. Potassium ferrate is self-prepared in the laboratory with a purity of 99%. Potassium ferrate 0.1mM, typical endocrine interferon bisphenol A (BPA) 0.1mM, TiO 2 1g.L -1 , The experiment found that the combined effect of UV and TiO2 for 10 minutes, the concentration of BPA reduced by 18%; Fe(VI) alone for 10 minutes, the concentration of BPA reduced by 33%; UV, TiO 2 Combined with Fe(VI), the removal rate of BPA reached 65% after 10 minutes.

specific example 2

[0035]A near-ultraviolet lamp with a power of 8W and a main emission wavelength of 365nm. Potassium ferrate is self-prepared in the laboratory with a purity of 99%. Potassium ferrate 0.16mM, mosquito repellent oil (DMP) 10.3Mg / L, TiO 2 40mg / L, the experiment found that after 120min, the UV and TiO 2 Under the combined effect, the concentration of DMP is reduced by 12%; while UV, TiO 2 Combined with Fe(VI), the removal rate of DMP reached 65% after 120 minutes.

specific example 3

[0037] A near-ultraviolet lamp with a power of 6W and a main emission wavelength of 365nm. Potassium ferrate is self-prepared in the laboratory with a purity of 99%. Potassium ferrate 0.1mM, typical endocrine disruptor estradiol, TiO 2 40mg / L, the experiment found that UV and TiO 2 Working together for 90 minutes, the concentration is reduced by 10%; UV, TiO 2 Combined with Fe(VI), the removal rate of estradiol reached 80% after 90 minutes.

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Abstract

The invention discloses a potassium ferrate-photo catalytic oxidation method and a device, which comprises that the potassium ferrate is combined with light generated in a photo catalysis reaction to generate Fe (V), and inhibits the recombination of photoproduction electrons and photoproduction cavities in the photo catalytic oxidation; and the reaction device is a potassium ferrate-photo catalytic oxidation reaction device. The method and the device of the invention are not only energy-saving and environment-friendly, but also have extremely high oxidation efficiency and overcome the defects of the high selectivity of a single potassium ferrate oxidation method and the low efficiency of a single photo catalytic oxidation method, and especially overcome the defect of slow reaction time of the photo catalytic oxidation method. In addition, the device of the invention has small volume, simple installation, no noise, wide applicable pH range, and moreover, the device has no secondary pollution, and high reaction rate, thus being a novel experimental device which is integrated with such strong abilities as sterilization, algae removal, oxidation, adsorption, flocculation, muddy removal, decoloration and deodorization, especially being suitable for an application in drinking water treatment.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and particularly relates to a high-valent iron potassium-photocatalytic oxidation device and method that can remove toxic and harmful substances that are difficult to degrade in water, sterilize, remove algae, and deodorize Background technique [0002] Recently, due to the increase of toxic and harmful substances that are difficult to degrade in water, it is more and more urgent to study new and efficient water treatment technologies. Potassium ferrate is a new type of water disinfectant developed since the 1970s after ozone, hydrogen peroxide, and chlorine dioxide. Potassium ferrate is a hexavalent iron salt with strong oxidizing properties, especially under acidic conditions, its standard redox potential (2.20V) is the largest among all disinfectants used in water treatment today. In addition, in the oxidation process, potassium ferrate itself is reduced to a new substance Fe(OH) 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/32
Inventor 李聪高乃云李学艳马艳姚行平
Owner TONGJI UNIV
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