Device and method for coordinating cathode and anode to degrade nitrate on basis of taking zero-valent iron loaded nanometer composite resin as catalyst

A nano-composite and synergistic degradation technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of inconvenient engineering application and incomplete removal, and achieve stable and reliable treatment effect and high selectivity , the effects of good engineering application conditions and prospects

Active Publication Date: 2018-08-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the defects in the prior art that electrolysis removes nitrate only by converting it into ammonia nitrogen, which is incomplete and inconvenient for engineering application, the present invention provides a synerg...

Method used

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  • Device and method for coordinating cathode and anode to degrade nitrate on basis of taking zero-valent iron loaded nanometer composite resin as catalyst
  • Device and method for coordinating cathode and anode to degrade nitrate on basis of taking zero-valent iron loaded nanometer composite resin as catalyst
  • Device and method for coordinating cathode and anode to degrade nitrate on basis of taking zero-valent iron loaded nanometer composite resin as catalyst

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Embodiment 1

[0043] This embodiment is a device based on a nano-composite resin loaded with zero-valent iron as a catalyst for the synergistic degradation of nitrate between the anode and cathode, such as figure 2 As shown, the device of the present invention is an electrochemical reaction device, comprising an anode 2, a water inlet pipe 3, a cathode 5, a zero-valent iron-loaded nanocomposite conductive resin 6 and an outlet pipe 7, the cathode 5 is a hollow cylinder, and the The zero-valent iron-loaded nanocomposite conductive resin 6 is evenly filled into the inner space of the cathode 5, and the cathode 5 and the zero-valent iron-loaded nanocomposite conductive resin 6 form a resin column; the anode 2 is inserted into the inner space of the resin column , the water inlet pipe 3 leads to the front end of the resin column, and the water outlet pipe 7 leads out from the rear end of the resin column.

[0044] The device also includes a resin column protection layer 4 , and the resin colum...

Embodiment 2

[0053] This example is an example of using a polystyrene-based resin as a carrier material to prepare a zero-valent iron-loaded nanocomposite resin for synergistic degradation of nitrate between the cathode and anode.

[0054] The device of the present embodiment is the same as in embodiment 1, and the method comprises the following steps:

[0055] (1) taking methyl acrylate as a monomer and divinylbenzene as a crosslinking agent, adding carbon nanotubes under the action of porogens, initiators and dispersants to obtain conductive resins containing carboxyl groups; the carbon nanotubes Added to make the resin have conductive function.

[0056] (2) Mix the conductive resin containing carboxyl groups in step (1) and sodium hydroxide solution to react evenly, add the reacted resin to ferric chloride solution for reaction, and finally add sodium borohydride solution for ultrasonic reduction, and finally the nano The firm load of zero-valent iron is fixed on the polystyrene-based ...

Embodiment 3

[0065] This example is an example of using a polystyrene-based resin as a carrier material to prepare a zero-valent iron-loaded nanocomposite resin for synergistic degradation of nitrate between the cathode and anode.

[0066] The device of the present embodiment is the same as in embodiment 1, and the method comprises the following steps:

[0067] (1) first synthesize the nano-composite conductive resin loaded with zero-valent iron, the quality of the resin prepared in this embodiment is 0.5g, the nano-zero-valent iron content is 70mg, and the particle size of the nano-zero-valent iron particles is 5-200nm; The resin is packed into a specific conductive resin column.

[0068] (2) With 100mg / L NO 3 - -N solution is the simulated pollutant, the electrolyte is 2mol / L sodium chloride solution, and the peristaltic pump is used to control the water output from the resin column at a speed of 0.15mL / min.

[0069] (3) Turn on the power supply. When the voltage is 0V, 30% to 40% of ...

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Abstract

The invention belongs to the technical field of water treatment and discloses a device and a method for coordinating cathode and anode to degrade nitrate on the basis of taking zero-valent iron loadednanometer composite resin as a catalyst. The device comprises an anode, a water inlet pipe, a cathode, zero-valent iron loaded nanometer composite resin and a water outlet pipe; the cathode is a hollow cylinder body; the internal space of the cathode is filled with the zero-valent iron loaded nanometer composite resin uniformly; the cathode and the zero-valent iron loaded nanometer composite resin form a resin column; and the anode is inserted into the internal space of the resin column. The method comprises the following steps: a) synthesizing the zero-valent iron loaded nanometer compositeresin and filling the device with the resin; and b) pumping a nitrate solution taking chlorine salt as electrolyte into the device through the water inlet pipe, switching on the device, applying voltage to perform treatment, and guiding out the output water through the water outlet pipe after treatment. According to the method, the resin serves as a carrier, the zero-valent iron serves as the catalyst, the nitrated is converted into nitrogen under the coordination of the cathode and the anode to be discharged, and important value in the environmental pollution treatment is achieved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a device and a method for synergistically degrading nitrate between an anode and an anode based on a nano-composite resin loaded with zero-valent iron as a catalyst. Background technique [0002] Nitrogen is an important element to maintain most life on earth. The nitrogen in water is mainly ionic nitrogen. Various forms of nitrogen undergo nitrogen cycle, and finally decompose and oxidize the product into nitrate. Nitrogen compounds in water have a high solubility, and when nitrogen compounds in water are supplemented externally, the content in water can increase without hindrance. With the expansion of population density and the development of industry and agriculture, more and more domestic garbage, urban sewage, industrial wastewater and the infiltration of chemical fertilizers and pesticides are discharged, which makes the pollution of groundwater more an...

Claims

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Application Information

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IPC IPC(8): C02F1/461
CPCC02F1/46104C02F1/46109C02F2001/46133C02F2001/46142C02F2101/163
Inventor 高冠道刘振威潘丙才丁杰蒲良桃王炎峰任志远喻安晴董上上
Owner NANJING UNIV
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