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Device for removing heavy metals in wastewater by using electrochemical method and implementation method thereof

A heavy metal, electrochemical technology, applied in the field of water treatment, can solve the problem of poor removal of pollutants and other problems

Active Publication Date: 2021-09-10
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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  • Device for removing heavy metals in wastewater by using electrochemical method and implementation method thereof
  • Device for removing heavy metals in wastewater by using electrochemical method and implementation method thereof
  • Device for removing heavy metals in wastewater by using electrochemical method and implementation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 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, and start the DC power supply , treated for 10 minutes, discharged the water sample from the cathode chamber, drained the wastewater from the anode chamber into the cathode chamber and added 50 μm permanganate, injected the waste water into the anode chamber, started the DC power supply and kept stirring, continuously aerating, and kept the permanganate The salt concentration is 50μm, the energizing current is set to 50mA, and after energizing 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 amount of water, and ...

Embodiment 2

[0044] 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

[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 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.

[0048] 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 device for removing heavy metals in wastewater by using an electrochemical method and an implementation method thereof. An anode chamber and a cathode chamber are communicated to form a flow type reactor. Wastewater firstly passes through the anode chamber, and the purpose of complex breaking is achieved through electrolysis. Then, the wastewater flows into the cathode chamber, hydrogen peroxide is generated in situ through electrolysis to activate potassium permanganate, so that manganese dioxide is generated in situ to adsorb heavy metals. Due to the fact that electrolyte is added and continuous stirring and aeration are carried out, the removal rate of chromium is far higher than that in the prior art. It can be known through a curve graph that compared with a control group, the removal rate of heavy metal chromium is increased to about 90% from about 10%-20%, and the highest removal rate can reach 93.21%.

Description

technical field [0001] The invention relates to a device and a method thereof, in particular to a device for removing heavy metals in wastewater by an electrochemical method and a realization method thereof, belonging 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 agen...

Claims

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Application Information

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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