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Device and method for filtering and removing organic pollutants in water by electro-catalytic ozone adsorption membrane

A technology of organic pollutants and electrocatalysis, which is applied in the field of water treatment, can solve the problems of low concentration and limited degradation rate, and achieve the effect of increasing removal rate, enhancing mass transfer, and promoting catalytic degradation process

Active Publication Date: 2020-11-17
BEIJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Provides a high-throughput electrocatalytic ozone adsorption membrane filtration device and method for removing organic pollutants in water, which couples adsorption membrane filtration, electrocatalysis and ozone oxidation, uses filtration to enhance mass transfer, improves current utilization and solves traditional high-level problems The low concentration of pollutants in the interface reaction of oxidation limits the degradation rate; the preparation and screening of H2O2 with high electrocatalytic reduction in situ efficiency, high Flux, high conductivity, anti-oxidation properties and stability of carbon nanomaterial composite film, electrocatalytic reduction of oxygen to generate H2O2 and ozone in the influent The reaction generates hydroxyl radicals, and by strengthening the generation of hydroxyl radicals and diffusion mass transfer, the efficient, rapid and continuous removal of refractory organic pollutants in water is realized

Method used

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  • Device and method for filtering and removing organic pollutants in water by electro-catalytic ozone adsorption membrane
  • Device and method for filtering and removing organic pollutants in water by electro-catalytic ozone adsorption membrane
  • Device and method for filtering and removing organic pollutants in water by electro-catalytic ozone adsorption membrane

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Embodiment 1

[0040] In this embodiment, the electrocatalytic ozone filter membrane electrode is pressed by commercial carbon cloth (conductive layer) and support layer (hydrophilic filter membrane), and is connected to an external power supply. The organic pollutants in the influent are first adsorbed on the carbon cloth layer, and at the same time, the filter membrane electrode electrocatalyzes the reduction of oxygen to generate H in situ 2 o 2 , react with ozone in the influent water to generate strong oxidizing free radicals, then oxidize the strong oxidizing free radicals generated by the reaction with ozone, and finally be degraded, and the above-mentioned continuous reaction of adsorption and degradation in the filtration process is carried out in a continuous cycle, so as to realize the organic pollutants in water Long-term continuous and efficient removal.

[0041] The electrocatalytic ozone membrane filtration reactor is characterized in that: the reactor feed water is continuou...

Embodiment 2

[0044] Except that the electrocatalytic ozone filter membrane electrodes are made of carbon nanotubes and hydrophilic membranes, the other device configurations are the same as in Example 1. The carbon nanotube electrocatalytic ozone filter membrane electrode is composed of a carbon nanotube material tube conductive layer and a base film. Its preparation method is to prepare a uniformly dispersed carbon nanotube dispersion solution first, and then vacuum filter or pressurize it. Loaded on the basement membrane surface. The loading capacity of conductive nanomaterials is 22g / m 2 , the thickness of the conductive layer is 85 μm, the experimental results can be found in image 3 and Table 1.

Embodiment 3

[0046] Except that rhodamine B (RhB) concentration is 10mg L in the raw water stock solution -1 , except that the filtration time was 120min, all the other devices and experimental parameters were the same as in Example 1. For experimental results, see Figure 4 and Table 1.

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Abstract

The invention relates to a device and a method for removing organic pollutants in water by electro-catalytic ozone adsorption membrane filtration. The device comprises an oxygen source, an ozone generator and an ozone solution storage tank which are connected in sequence, wherein the ozone solution storage tank and a raw water storage tank are connected to an electro-catalytic ozone membrane filtration reactor through pipelines; the electro-catalytic ozone membrane filtration reactor is composed of a metal mesh electrode, a silica gel insulating washer and an electro-catalytic ozone filtrationmembrane electrode; the positive electrode of a stabilized voltage supply is connected to the metal mesh electrode through a connecting wire; and the electro-catalytic ozone filtration membrane electrode is connected to the negative electrode of the stabilized voltage supply through a connecting wire; the cathode and the anode are separated by the silica gel insulating washer. The device and themethod have the technical advantages of being low in operation pressure, small in impressed current, low in energy consumption, capable of efficiently and continuously removing organic pollutants difficult to degrade and high in ozone conversion free radical efficiency.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a device and method for removing organic pollutants in water. Background technique [0002] In recent years, with the continuous decline in the quality of drinking water sources, trace organic pollutants in the water environment, such as personal care products, pharmaceutical active substances, and natural organic matter, have gradually increased. These organic pollutants have low concentration, complex composition, stable structure, and various types, and some organic substances are considered to be the precursors of disinfection by-products. Long-term drinking of drinking water containing such pollutants has potential hazards to human health. Therefore, the targeted development of new efficient, economical and applicable drinking water treatment technology is very important to control the organic pollution in drinking water and improve the level of drinking water safety...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/30C02F101/34C02F101/38
CPCC02F9/00C02F2101/30C02F1/4672C02F1/78C02F1/001C02F1/722C02F1/444C02F2305/023C02F2101/38C02F2101/34C02F2209/06
Inventor 杨晴黄海鸥
Owner BEIJING NORMAL UNIVERSITY
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