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Electrode for synchronously removing nitrate and tetrachloromethane from water and preparation method and use method thereof

A carbon tetrachloride, nitrate technology, applied in chemical instruments and methods, water/sewage treatment equipment, water pollutants, etc., can solve the problems of high applied voltage, not considering the interaction between nitrate and carbon tetrachloride, etc. , to achieve good performance

Inactive Publication Date: 2017-02-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applied voltage is high, and there are few studies on the simultaneous removal of nitrate and carbon tetrachloride, and the interaction between nitrate and carbon tetrachloride is not considered during the simultaneous removal

Method used

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  • Electrode for synchronously removing nitrate and tetrachloromethane from water and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The cast iron and aluminum ingots were put into the melting furnace according to the mass ratio of total aluminum to total iron of 80%:20%, and heated and melted at 1500°C. After being discharged and cooled, the obtained alloy block is wire-cut to obtain an aluminum-iron alloy electrode material with a length of 1 cm×1 cm×1 mm. Wires are welded on the prepared electrodes, and the electrode solder joints and other parts that do not need to be exposed to conduction are sealed with epoxy resin. The Al-Fe alloy electrode is put into the cathode chamber, and the saturated calomel reference electrode is connected with a salt bridge.

[0034] At room temperature, measure 15 ml of an aqueous solution containing nitrate concentration of 56 mg / L, carbon tetrachloride concentration of 1200 μg / L, and supporting electrolyte of 0.01 mol. / L KCl into the cathode chamber without adjusting the pH of the solution. The applied voltage is -1.4 V. After each water sample passed through a 0.22...

Embodiment 2

[0036] The cast iron and aluminum ingots were put into the melting furnace according to the mass ratio of total aluminum to total iron of 90%:10%, and heated and melted at 1300°C. After being discharged and cooled, the obtained alloy block is wire-cut to obtain an aluminum-iron alloy electrode material with a length of 1 cm×1 cm×1 mm. Wires are welded on the prepared electrodes, and the electrode solder joints and other parts that do not need to be exposed to conduction are sealed with epoxy resin. The Al-Fe alloy electrode is put into the cathode chamber, and the saturated calomel reference electrode is connected with a salt bridge.

[0037] At room temperature, measure 15 ml of an aqueous solution with a nitrate concentration of 14 mg / L, a carbon tetrachloride concentration of 1200 μg / L, and a supporting electrolyte of 0.01 mol. / L KCl into the cathode chamber without adjusting the pH of the solution. The applied voltage is -1.2 V. After each water sample passed through a 0.22...

Embodiment 3

[0039] The cast iron and aluminum ingot are put into the melting furnace according to the mass ratio of total aluminum to total iron of 90%:10%, and heated and melted at 1000°C. After being discharged and cooled, the obtained alloy block is wire-cut to obtain an aluminum-iron alloy electrode material with a length of 1 cm×1 cm×1 mm. Wires are welded on the prepared electrodes, and the electrode solder joints and other parts that do not need to be exposed to conduction are sealed with epoxy resin. The Al-Fe alloy electrode is put into the cathode chamber, and the saturated calomel reference electrode is connected with a salt bridge.

[0040] At room temperature, measure 15 ml of an aqueous solution with a nitrate concentration of 28 mg / L, a carbon tetrachloride concentration of 600 μg / L, and a supporting electrolyte of 0.01 mol. / L KCl into the cathode chamber without adjusting the pH of the solution. The applied voltage is -1.2 V. After each water sample passed through a 0.22 µm...

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Abstract

The invention discloses an electrode for synchronously removing nitrate and tetrachloromethane from water, which is an aluminum-iron alloy material with a mass ratio of total aluminum to total iron of 90 percent to 10 percent or 80 percent to 20 percent. A preparation method of the electrode comprises the following steps of a) heating and melting ingot iron and pure aluminum at a temperature of 1000 to 1800 DEG C for 1 to 2 h; b) obtaining the needed electrode material by utilization of a wire-electrode cutting manner; c) packaging an exposed conductive part. A use method of the electrode disclosed by the invention comprises the following steps of 1) arranging the electrode; 2) adjusting to-be-purified water body; 3) performing electrochemical reaction. The electrode, the preparation method and the use method disclosed by the invention have the advantages that water containing the nitrate and the tetrachloromethane is subjected to applied voltage, so that the nitrate and disinfection by-products in the water are removed through electrochemical reduction degradation by a cathode made of the aluminum-iron alloy material; in an electrochemical reduction degradation process, the nitrate is converted into nitrogen gas, nitrite and ammonia nitrogen, and chlorine contained in the tetrachloromethane is sequentially removed.

Description

Technical field [0001] The invention relates to an electrode and a preparation and use method, and more specifically, to an electrode for simultaneous removal of nitrate and carbon tetrachloride in water and a preparation and use method. Background technique [0002] With the continuous improvement of the level of industrialization, more than 25% of the world's water bodies have been polluted. How to treat the sewage bodies and turn them into safe drinking water has become a major task that we humans have to face. [0003] Nitrate pollution in water is mainly produced by human production and life. Agricultural fertilization, domestic sewage, industrial wastewater, etc. enter the groundwater body after leaching and infiltration. Carbon tetrachloride is an important industrial raw material and solvent. It is often used as a solvent for many organic substances, refrigerants and dry cleaning agents in industrial production. Some organic chemical plants and petrochemical plants can cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/16C02F101/36
CPCC02F1/46109C02F1/4678C02F2001/46133C02F2101/163C02F2101/36C02F2201/46135
Inventor 杨晓进许杰杜念戚伟健胡汉君
Owner BEIJING UNIV OF CHEM TECH
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