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A kind of method for realizing electrochemical method to remove heavy metal in wastewater

A heavy metal and electrochemical technology, applied in the field of water treatment, can solve the problems of poor pollutant removal effect, achieve the effect of reducing secondary pollution, avoiding introduction, and realizing automatic operation

Active Publication Date: 2022-05-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, potassium permanganate is difficult to decompose to produce manganese dioxide under normal conditions, so the removal effect of pollutants in wastewater is poor, which can no longer meet people's requirements

Method used

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  • A kind of method for realizing electrochemical method to remove heavy metal in wastewater
  • A kind of method for realizing electrochemical method to remove heavy metal in wastewater
  • A kind of method for realizing electrochemical method to remove heavy metal in wastewater

Examples

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Effect test

Embodiment 1

[0044] The device for removing heavy metals in wastewater by electrochemical method of the present invention is used to treat chromium-containing wastewater containing 100 mg / L. The steps are as follows: inject the wastewater to be treated into the anode chamber 8, inject water with 0.05M electrolyte into the cathode chamber, and start the direct current Power supply, treatment for 10 minutes, discharge the water sample from the cathode chamber, discharge the wastewater from the anode chamber into the cathode chamber and add 50 μm permanganate, inject the waste water into the anode chamber, start the DC power supply and keep stirring, and constantly aerate to maintain high manganese The salt concentration is 50μm, the electrification current is set to 50mA, and after electrification for 10min, it settles for 5h and discharges the treated sewage. In this example, the permanganate is potassium permanganate, and potassium permanganate is completely dissolved with an appropriate am...

Embodiment 2

[0047] The device for removing heavy metals in wastewater by electrochemical method of the present invention is used to treat chromium-containing wastewater containing 100mg / L. The steps are as follows: inject the wastewater to be treated into the anode chamber 8, inject water with 0.05M electrolyte into the cathode chamber 9, and start the process. DC power supply, process for 10min, discharge the water sample from the cathode chamber 9, discharge the wastewater from the anode chamber 8 into the cathode chamber 9 and add 100 μm permanganate, inject the wastewater into the anode chamber 8, start the DC power supply 14 and keep stirring , continuously aerate, keep the concentration of permanganate at 100μm and the energizing current at 100mA, after energizing for 10min, settle for 5h and discharge the treated sewage. In this example, the permanganate is potassium permanganate, and the potassium permanganate is completely dissolved with an appropriate amount of water, and then ad...

Embodiment 3

[0050] The device for removing heavy metals in wastewater by electrochemical method of the present invention is used to treat chromium-containing wastewater containing 100mg / L. The steps are as follows: inject wastewater to be treated into anode chamber 8, inject water with 0.05M electrolyte into cathode chamber 9, and start the process. DC power supply, treatment for 10 minutes, discharge the water sample from the cathode chamber, drain the wastewater from the anode chamber into the cathode chamber and add 50 μM permanganate, inject the waste water into the anode chamber, start the DC power supply and keep stirring, constantly aerating, to maintain a high temperature. The manganate concentration is 100μm and the energizing current is 200mA. After energizing for 20 minutes, it settles for 5 hours and discharges the treated sewage.

[0051] In this example, the permanganate is potassium permanganate, and the potassium permanganate is completely dissolved with an appropriate amou...

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Abstract

The invention discloses a method for removing heavy metals in waste water by electrochemical method. By connecting the anode chamber and the cathode chamber, the waste water passes through the anode chamber first, achieves the purpose of breaking through electrolysis, and then flows into the cathode chamber to add permanganate Potassium, through electrolysis in situ to generate hydrogen peroxide to activate potassium permanganate, to achieve the purpose of in situ generation of manganese dioxide to adsorb heavy metals. Due to the addition of electrolyte and continuous stirring and aeration, the removal rate of chromium far exceeds that of the existing technology. It can be seen from the graph that compared with the control group, the removal rate of heavy metal chromium has increased from about 10%-20% to 90%. Around, up to 93.21%.

Description

technical field [0001] The invention relates to a method for removing heavy metals in wastewater, in particular to a method for realizing an electrochemical method for removing heavy metals in wastewater, and belongs to the technical field of water treatment. Background technique [0002] In recent years, with the rapid development of industry, a large amount of electroplating wastewater, metallurgical wastewater, and mine wastewater have been discharged, polluting groundwater and surface water, and causing harm to the human body. Therefore, the treatment of industrial wastewater is currently the focus of environmental pollution. Traditionally, heavy metals in wastewater are removed by changing the valence state of heavy metals to reduce toxicity or by coagulation, sedimentation and adsorption. Since mixed heavy metal wastewater generally adds complexing agents to complex heavy metals, it is necessary to decompose the wastewater. Potassium permanganate is an oxidizing agent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/22
CPCC02F9/00C02F1/52C02F1/72C02F1/461C02F1/281C02F2101/22Y02W10/37
Inventor 张北平江进庞素艳郭钦黄润
Owner GUANGDONG UNIV OF TECH
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