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Method for cooperatively removing heavy metal and organic matters by capacitive deionization coupling electrocatalysis

A technology of capacitive deionization and coupled electricity, which is used in chemical instruments and methods, separation methods, electrochemical water/sewage treatment, etc., to achieve the effect of promoting industrialization, improving removal efficiency, and shortening the process.

Active Publication Date: 2018-08-21
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of heavy metal pollutants such as copper, nickel, lead and cadmium in electroplating wastewater and organic compound pollution such as citric acid and EDTA, and use carbon materials as substrates to support titanium dioxide or manganese dioxide catalysts to prepare new electrode materials , and using modified electrodes to provide a method for coupled capacitive deionization to remove heavy metals and synergistic electrocatalytic removal of organics

Method used

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  • Method for cooperatively removing heavy metal and organic matters by capacitive deionization coupling electrocatalysis
  • Method for cooperatively removing heavy metal and organic matters by capacitive deionization coupling electrocatalysis
  • Method for cooperatively removing heavy metal and organic matters by capacitive deionization coupling electrocatalysis

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Embodiment

[0022] (1) TiO 2 Preparation of sol: Take 14mL tetrabutyl titanate, 16mL absolute ethanol in a beaker, and stir continuously and rapidly for 30min to obtain solution A; take another 8mL absolute ethanol, 2.4mL deionized water, and 1.4mL glacial acetic acid in a beaker , add concentrated HCl dropwise to adjust the pH to 2, which is solution B; while stirring continuously, slowly inject solution B into solution A with a syringe, and stir for about 40 minutes to form TiO 2 Sol.

[0023] (2)TiO 2 Preparation of / ACF electrode: The pretreated activated carbon fiber felt (ACF) was impregnated in TiO with tweezers 2 In the sol, soak for 5 minutes and pull it up, so that the titanium dioxide sol is attached to the carbon felt, dry it at 105 ° C, then soak it, repeat it three times, and dry it; then put the TiO2 2 / ACF is submerged in deionized water, and reacted in a water bath at 95°C for 2 hours. After the reaction is complete, wash off the weak TiO with deionized water 2 , drie...

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Abstract

The invention belongs to the fields of water treatment and resource recycling and discloses a capacitive deionization (CDI) coupling electrocatalysis system and a method for cooperatively removing heavy metal and organic pollutants in water by using the CDI coupling electrocatalysis system. Under the conditions of an external electric field (smaller than 2V), a capacitive electrostatic adsorptioneffect is coupled with an electrocatalytic oxidation degradation effect, and the heavy metal and the organic pollutants are simultaneously moved. The CDI coupling electrocatalysis system disclosed bythe invention has the beneficial effects cooperative removal of the heavy metal and the organic pollutants in the water is realized by using electrodes with catalytic activity, and the defect and theproblem that a traditional water treatment technology only treats a single pollution system is overcome / solved. The reaction system has the advantages of simplifying a treatment technology, shorteningthe flow, reducing secondary pollution and facilitating scale and industrial application.

Description

technical field [0001] The invention belongs to the technical field of water treatment and resource reuse, and relates to a capacitive deionization coupled electrocatalysis system, and the purpose of synergistically removing heavy metals and organic matter in water is realized by using the system. Background technique [0002] With the rapid development of the economy, a large number of substandard discharges of industrial production wastewater have made water pollution more and more serious. Among them, the wastewater from the electroplating industry contains a large amount of heavy metal ions, organic complexing agents, and cyanides. It is very toxic and has "three "Cause" effect, which is a great hazard to life safety. The addition of these complexing agents not only greatly increases the COD of electroplating effluent, but also combines with heavy metal ions to form stable complexes, so that some metal ions in wastewater cannot be removed by forming hydroxide precipitati...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F1/46C02F101/20C02F101/34C02F101/38C02F101/30
CPCC02F1/46C02F1/4691C02F2101/20C02F2101/30C02F2101/34C02F2101/38
Inventor 柳丽芬苑丽新
Owner DALIAN UNIV OF TECH
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