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Method for treating heavy-metal-containing wastewater by external electric field reinforced micro-electrolysis technology

A technology for technical treatment and enhanced treatment, applied in the field of heavy metal-containing wastewater treatment, can solve the problems of limiting the popularization and application of micro-electrolysis technology, limited catalytic reaction capacity, long wastewater treatment time, etc. The effect of small area and fast reaction rate

Inactive Publication Date: 2012-05-02
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0005] However, since the micro-electrolysis method only utilizes its own primary battery function, it can only form a weak current and voltage on the surface of the micro-electrolysis particles, and the catalytic reaction capacity of the current and voltage is limited, which will inevitably lead to a longer wastewater treatment time and Low efficiency and other issues lead to oversized water treatment equipment and low compliance rate, which limits the popularization and application of micro-electrolysis technology in the treatment of heavy metal-containing wastewater

Method used

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Effect test

Embodiment 1

[0024] Embodiment 1: The method for treating waste water containing heavy metals by electric field enhanced micro-electrolysis technology outside the present invention, the specific steps are as follows:

[0025] The feasibility and superiority of this method are evaluated by the concentration of residual copper ions. At the same time, compared with the traditional micro-electrolysis method to treat the wastewater, the quality of the wastewater is: Cu 2+ =100mg / L, Na 2 SO 4 =0.1mol / L.

[0026] Use sulfuric acid to adjust the pH of the wastewater to 9, and pass the wastewater into the enhanced micro-electrolysis reactor at a constant flow rate of 100L / s. The enhanced micro-electrolysis reactor is filled with iron-carbon dispersed mixed particle irregular fillers. The bed layer, the mass ratio of iron to carbon is 1:10, and a DC electric field is input through the electrode sleeve electrode, the electric field strength is 0.1V / cm, and the external electric field acts on the pa...

Embodiment 2

[0029] Embodiment 2: The method for treating waste water containing heavy metals by electric field enhanced micro-electrolysis technology outside the present invention, the specific operations are as follows:

[0030] The feasibility and superiority of this method are evaluated by the concentration of residual copper ions. At the same time, compared with the traditional micro-electrolysis method to treat the wastewater, the quality of the wastewater is: Cu 2+ =100mg / L, Na 2 SO 4 =0.1mol / L.

[0031] Use sulfuric acid to adjust the wastewater to pH = 2, control the constant flow rate of 0.1mL / s to feed the wastewater into the enhanced micro-electrolysis reactor, and the enhanced micro-electrolysis reactor is filled with aluminum-copper-carbon mixed particle structured packing as the micro-electrolysis filler. The moving bed layer, the aluminum-copper-carbon mass ratio is 2:1:1, and an external electric field with an AC electric field strength of 4V / cm is input through the para...

Embodiment 3

[0034] Embodiment 3: The method for treating heavy metal-containing wastewater by electric field enhanced micro-electrolysis technology, the specific steps are as follows:

[0035] The feasibility and superiority of this method are evaluated by the concentration of residual copper ions. At the same time, compared with the traditional micro-electrolysis method to treat the wastewater, the quality of the wastewater is: Cu 2+ =100mg / L, Na 2 SO 4 =0.1mol / L.

[0036] Use sulfuric acid to adjust the wastewater to pH=5, control the constant flow rate of 10mL / s to feed the wastewater into the enhanced micro-electrolysis reactor, and the enhanced micro-electrolysis reactor is filled with copper-zinc alloy and carbon as micro-electrolysis fillers. Type combined fluidized bed layer, the mass ratio of copper-zinc alloy to carbon is 3:1, and an external electric field with a pulse current intensity of 5V / cm is input to act on the packing layer through the combination of electrode sleeve ...

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Abstract

The invention discloses a method for treating heavy-metal-containing wastewater by an external electric field reinforced micro-electrolysis technology, and belongs to the fields of water treatment technologies and recycling. In the method, the heavy-metal-containing wastewater is pretreated or not pretreated and then introduced into an external electric field reinforced micro-electrolysis reactor to be treated, a micro-electrolysis filler is filled in the reactor and is put in an external electric field with certain intensity, and micro-electrolysis reaction is promoted and reinforced through the reinforcing effect of the external electric field, so that metal ions in the wastewater are reduced into metal simple substances on the surface of the filler, and effluent can meet the requirement of the wastewater emission standard or can be directly recycled in the production process. The method has the advantages of high reaction speed, removal rate, recycling efficiency and environment compatibility and the like.

Description

technical field [0001] The invention relates to a treatment method for wastewater containing heavy metals, in particular to a method for treating wastewater containing heavy metals and recovering heavy metal resources in wastewater using an external electric field enhanced micro-electrolysis technology, which belongs to the technical field of wastewater treatment. Background technique [0002] With the rapid development of my country's mining, smelting, electroplating, metal processing, chemical, pigment and other industries, the production capacity of enterprises has been continuously improved, and a large amount of heavy metal-containing wastewater is produced in the production process, and the amount of wastewater is increasing. If these heavy metal-containing wastewater Direct discharge into the environment will not only cause serious pollution to water bodies or other environmental factors, but also pose a huge potential threat to the human body, because heavy metals in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/20
Inventor 徐晓军王刚杨津津朱丽云高琨阳聂蕊范领东韩振宇
Owner KUNMING UNIV OF SCI & TECH
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