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Electrochemical device applied to oily wastewater treatment and treatment method thereof

A waste water treatment and electrochemical technology, which is applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc., can solve problems such as poor demulsification effect, and achieve improved service life, large coverage, and improved filtration effect of ability

Active Publication Date: 2022-07-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] A further purpose is to provide a microporous anode with a hydrophilic and oleophobic electrode surface and an oleophilic and hydrophobic electrode surface for the poor demulsification effect of the oil-in-water emulsion and higher requirements on the life of the electrode. An electrochemical device composed of a microporous cathode makes the oil-in-water emulsion undergo phase inversion at the cathode and then oxidizes and filters at the anode to realize the treatment of oily wastewater

Method used

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  • Electrochemical device applied to oily wastewater treatment and treatment method thereof
  • Electrochemical device applied to oily wastewater treatment and treatment method thereof
  • Electrochemical device applied to oily wastewater treatment and treatment method thereof

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Embodiment 1

[0103] Using a titanium-based antimony-doped tin dioxide microporous through-body electrode applied to the treatment of oily wastewater of the present invention as the anode, and using the microporous stainless steel tube as the cathode to treat the oil and gas exploitation and production wastewater, the following steps are included:

[0104] Step 1. Prepare antimony-doped tin dioxide microporous through-body electrode, and the preparation steps are as follows:

[0105] The first step: boil the titanium foam with a thickness of 5mm in oxalic acid with a volume concentration of 30%, rinse with deionized water, alkali rinse with NaOH solution of 20% concentration and rinse with deionized water, then soak in deionized water. 12h to remove the oil stain and oxide layer on the surface of foam titanium, and dry it under 40 holes; configure a sufficient amount of mixed solution of antimony trichloride (16mg / L) and citric acid (40mg / L) and tin tetrachloride (15mg / L) / L) and sulfuric a...

Embodiment 2

[0120] Using a titanium-based antimony-doped tin dioxide microporous through-body electrode applied to the treatment of oily wastewater of the present invention as the anode, and using the microporous stainless steel tube as the cathode to treat a certain food processing wastewater, the following steps are included:

[0121] Step 1: Prepare a microporous antimony-doped tin dioxide microporous through-body electrode. The specific preparation steps are as follows:

[0122] The first step: the titanium foam with a thickness of 3mm is boiled in oxalic acid with a volume concentration of 10%, rinsed with deionized water, alkali washed with a 10% concentration of NaOH solution and rinsed with deionized water, and then soaked in deionized water. 12h to remove the oil stain and oxide layer on the surface of foamed titanium, and dry it at 35 °C; configure a sufficient amount of mixed solution of antimony trichloride (12mg / L) and citric acid (35mg / L) and tin tetrachloride (10mg / L) / L) a...

Embodiment 3

[0134] Using a titanium-based antimony-doped tin dioxide microporous through-body electrode applied to the treatment of oily wastewater of the present invention as the anode, and using the microporous stainless steel tube as the cathode to treat a certain machining wastewater, the following steps are included:

[0135] Step 1: Prepare a microporous antimony-doped tin dioxide microporous through-body electrode. The specific preparation steps are as follows:

[0136] The first step: boil the titanium foam with a thickness of 3mm in oxalic acid with a volume concentration of 20%, rinse with deionized water, alkali rinse with 15% concentration of NaOH solution and rinse with deionized water, then soak in deionized water. 12h to remove the oil stain and oxide layer on the surface of foamed titanium, and dry it at 30 °C; configure a sufficient amount of mixed solution of antimony trichloride (14mg / L) and citric acid (36mg / L) and tin tetrachloride (10mg / L) / L) and sulfuric acid (20mL...

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Abstract

The invention discloses a titanium-based antimony-doped tin dioxide microporous whole-body electrode applied to oily wastewater treatment, a preparation method and application of the titanium-based antimony-doped tin dioxide microporous whole-body electrode, an electrochemical device composed of the titanium-based antimony-doped tin dioxide microporous whole-body electrode and a metal cathode and application of the electrochemical device, and belongs to the field of electrochemical electrode preparation. The titanium-based antimony-doped stannic oxide whole-body electrode is prepared by the following method: firstly, carrying out tin-antimony electrodeposition on foamed titanium, then punching and tamping powder, carrying out secondary modification and surface modification on the powder by an ultrasonic impregnation method, and then carrying out die casting to form a pipe. The anode is uniformly covered with the antimony-doped tin dioxide active layer, the service life of the electrode under the action of high voltage is greatly prolonged, the demulsification capability of the electrode in oily wastewater treatment is enhanced, the surface of the electrode is hydrophilic and oleophobic, and an oil phase can be effectively filtered and separated. The titanium-based antimony-doped tin dioxide whole-body electrode is combined with a porous metal cathode, so that the phase inversion of oil-in-water emulsion can be completed, and the titanium-based antimony-doped tin dioxide whole-body electrode can be better applied to the treatment of oil-containing wastewater.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrode preparation for wastewater treatment, and in particular relates to a titanium-based antimony-doped tin dioxide microporous through-body electrode applied to the treatment of oily wastewater and a preparation method thereof, and a titanium-based antimony-doped tin dioxide microporous electrode Electrochemical device composed of through-body electrode and metal cathode and its application. Background technique [0002] Oily wastewater is one of the main components of industrial wastewater. A large amount of oily wastewater is generated not only from oil and gas extraction and processing, coking, mechanical processing, transportation ballast and other industrial links, but also from the processing and consumption of food and beverages in daily life. The oily compounds in the oily wastewater will be suspended on the surface of the water, separated from the water phase, and will als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F1/40C02F101/30
CPCC02F1/46109C02F1/725C02F1/40C02F2001/46133C02F2101/30Y02W10/37
Inventor 韩卫清赖骁威王祎顾连凯朱洪威沈锦优李健生孙秀云
Owner NANJING UNIV OF SCI & TECH
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