Method for degrading organic pollutants in water through electrochemical cathodic activation of persulfate

A technology of organic pollutants and persulfate, applied in the direction of electrochemical water/sewage treatment, water pollutants, chemical instruments and methods, etc., can solve problems such as residual ferric ions, iron sludge, and complicated operations. Achieve the effects of simple operation, avoiding secondary pollution and low energy consumption

Active Publication Date: 2013-10-09
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of existing iron sludge, damaged electrodes, residual ferrous ions, and complex operation caused by the addition of iron salts in the prior art, and to provide an electrochemical cathodic activated persulfate degradation method. Methods for Organic Pollutants in Water

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  • Method for degrading organic pollutants in water through electrochemical cathodic activation of persulfate
  • Method for degrading organic pollutants in water through electrochemical cathodic activation of persulfate
  • Method for degrading organic pollutants in water through electrochemical cathodic activation of persulfate

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specific Embodiment approach 1

[0016] Specific embodiment one: present embodiment is a kind of method of electrochemical cathodic activation of persulfate degrading organic pollutants in water, specifically completes according to the following steps:

[0017] The water polluted by organic matter to be treated is injected into the cathode / anode electrode pair reactor, and then persulfate is added until the concentration of persulfate is 0.01mmol / L-100mmol / L, and then the concentration of persulfate is 0.01mmol / L~100mmol / L and the cathode electrode voltage is +2.0V~-2.5V, and the treatment is 2min~180min, and the water treatment of the organic matter pollution to be treated is completed.

specific Embodiment approach 2

[0018] Specific implementation mode two: combination figure 1 The difference between this embodiment and specific embodiment 1 is: the cathode / anode electrode pair reactor includes a water inlet 1, a water outlet 2, a cathode 3, an insulating porous isolation tube 4, an anode 5, a DC power supply 6, a reference Compared with the electrode 7, the wire 8 and the reaction chamber 9, the water inlet 1 is arranged on the upper side wall of the reaction chamber 9, and the water outlet 2 is arranged on the lower side wall of the symmetrical side of the reaction chamber 9, and the anode 5 is arranged in the reaction chamber 9 In the center, the cathode 3 wraps the anode 5 and covers the space of the reaction chamber 9 below the water inlet 1, the cathode 3 and the anode 5 are separated by the insulating porous isolation tube 4, and the cathode 3 and the anode 5 are respectively connected to the DC power supply 6 by the wire 8 The negative pole and the positive pole are connected corre...

specific Embodiment approach 3

[0021] Specific implementation mode three: combination figure 2 The difference between this embodiment and specific embodiment 1 is: the cathode / anode electrode pair reactor includes a water inlet 1, a water outlet 2, a cathode 3, an insulating porous isolation tube 4, a number of anodes 5, a DC power supply 6, Reference electrode 7, wire 8 and reaction chamber 9, water inlet 1 is set at the bottom of reaction chamber 9, water outlet 2 is set on the upper side wall of reaction chamber 9, cathode 3 is covered with water outlet 2 below the form of fluidized bed In the space of the reaction chamber 9, some anodes 5 are interspersed in the cathode 3, and the cathode 3 is separated from some anodes 5 by an insulating porous isolation tube 4, and some anodes 5 are connected in parallel by a wire 8, and then connected to the positive pole of the DC power supply 6, The cathode is connected to the negative pole of the DC power supply 6 by a wire 8 , and the reference electrode 7 is su...

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Abstract

The invention discloses a method for degrading organic pollutants in water through electrochemical cathodic activation of persulfate, and relates to a method for degrading the organic pollutant in water, aiming at solving the problems of existence of iron sludge, damage to an electrode, residue of bivalent iron ions and complexity in operation caused by addition of an iron salt existing in the prior art. The method comprises the following steps: injecting water containing the organic pollutants to be treated into a cathode / anode electrode pair reactor; adding the persulfate; and then performing processing under the conditions of certain persulfate concentration and certain cathode electrode voltage to finish the water treatment on the organic pollution to be treated. The method has the advantages that: 1, the persulfate is activated without adding any chemical agent, so that the problems of secondary pollution, large sludge and the like can be avoided; and 2, the method is easy to operate, low in energy consumption and can finish activation of the persulfate under the conditions of smaller energy input, and the method can be generalized and used in large-scale engineering. The method is mainly used for removing the organic pollutants in the water.

Description

technical field [0001] The invention relates to a method for degrading organic pollutants in water. Background technique [0002] In recent years, refractory organic pollutants such as drugs and personal care products, endocrine disruptors, and organic chemical pollutants have been frequently detected in surface water, secondary effluent from sewage plants, and groundwater, posing a great threat to drinking water safety and the ecological environment . For the degradation and removal of these organic pollutants, advanced oxidation technology has great advantages. The activated persulfate oxidation technology based on sulfate radicals is an advanced oxidation technology that has been researched and developed rapidly in recent years, and has a good application prospect. Persulfate reacts with heat, light, microwave and Fe 2+ 、Co 2+ Sulfate free radicals can be generated under activation conditions such as transition metal ions. In addition, there are heterogeneous catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/72C02F101/30
Inventor 马军刘永泽罗从伟郭忠凯
Owner HARBIN INST OF TECH
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