Method and apparatus for removal and recovering of heavy metal ions from wastewater

A technology for heavy metal ions and wastewater, applied in the field of activated carbon baskets as electrodes, can solve the problems of small one-time treatment capacity, inability to treat wastewater, consumption of large precipitants, etc., to improve the treatment effect and treatment cost, improve the electrochemical efficiency, increase the The effect of oxidized area

Inactive Publication Date: 2015-11-04
王麒钧 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the current treatment methods for wastewater containing heavy metal ions, the equipment and processes used are either slow in treatment speed and small in one-time treatment volume, or have high investment and large floor area, or are prone to secondary pollution and high cost.
For example: although the activated carbon adsorption method requires less investment and occupies a small area, the activated carbon adsorption speed is slow and the adsorption capacity is small, so it is not suitable for treating wastewater with high pollutant concentration; It produces secondary pollution, consumes a large amount of precipitant, and cannot completely remove heavy metal ions, and cannot treat wastewater with extremely dilute concentrations of heavy metal ions; the ion exchange method can achieve no wastewater discharge during the treatment process, but its investment is high and it occupies a large area. The concentration of pollutants in the wastewater should not be too high, and it cannot be effective for all ion exchanges; the raw materials of the biosorption method are cheap and easy to obtain, can effectively recover heavy metal ions, and the adsorption effect is good, but the bacteria used are slow in reproduction and the mechanical properties of the biosorbent Weak strength, poor chemical stability, and the valence of metal ions cannot be changed during the adsorption process, reducing the toxicity of heavy metal ions
In the prior art, there is also a process for separating heavy metal ions in wastewater by electrochemical methods. For example, the patent with the authorized notification number CN101088938B discloses a treatment method for heavy metal sewage. The pH value is adjusted to neutral by using electrochemical catalytic oxidation technology. The sewage is intro

Method used

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Effect test

Embodiment 1

[0038] Design an electrochemical reactor device, the device is provided with an anode and a cathode; the anode and the cathode are titanium baskets, the anode titanium basket is filled with large granular activated carbon and electrochemical oxidation catalyst, the activated carbon and catalyst The particles are mixed with each other, and the middle of the anode activated carbon basket is connected to the positive pole of the power supply by a carbon rod or a refractory metal wire; the cathode titanium basket is filled with large granular activated carbon, which is connected to the negative pole of the power supply by a wire; the catalyst is made of copper sheet and its oxide mixture, the copper sheet and its oxide content are 10% of the mass of the activated carbon, the particle size of the activated carbon is 60 mesh, and the volumes of the anode and cathode activated carbon baskets are respectively the volume of the electrochemical reactor device 30% of the effective volume,...

Embodiment 2

[0041] An electrochemical reactor device is designed, the device is provided with an anode and a cathode; the anode and the cathode are nylon mesh, and the inside of the anode nylon mesh is filled with large granular activated carbon and electrochemical oxidation catalyst, and the activated carbon and catalyst Layered arrangement, the middle of the anode activated carbon basket is connected to the positive pole of the power supply by carbon rods or insoluble metal wires; the cathode nylon mesh is filled with large granular activated carbon, which is connected to the negative pole of the power supply by wires; the catalyst is made of iron nails and its oxide mixture, the iron nails and their oxide content are 15% of the activated carbon mass, the activated carbon particle size is 30 mesh, and the volumes of the anode and cathode activated carbon baskets are respectively the electrochemical reactor device 40% of the effective volume, a magnetic stirrer is provided under the elect...

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Abstract

The present invention relates to a method and an apparatus for electrochemical processing of heavy metal ion-containing wastewater by use of an activated carbon basket as an electrode. According to the method, by combination of physical adsorption concentration, electrochemical reduction adsorption and electrochemical catalytic oxidation, heavy metal ion-containing wastewater is processed, and copper, lead, zinc, iron, cobalt, nickel, manganese, cadmium, mercury, tungsten, molybdenum, and all other heavy metal pollutants in the wastewater can be effectively and thoroughly removed. The method not only can process wastewater containing a high concentration of heavy metal ions, is also suitable for processing wastewater containing extremely dilute concentrations of heavy metal ions (the concentration range is from 0 to hundreds of thousands of ppm), meanwhile compared with the traditional method, the method greatly reduces the processing cost, is inexpensive and simple in operation and equipment, can be recycled to run, and has great practical value.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, in particular to a process for removing heavy metal ions in waste water, and relates to a treatment method and device for waste water containing heavy metal ions in a wide concentration range, in particular to an activated carbon basket used as an electrode for electrochemically assisted removal of heavy metal ions in waste water. Method and apparatus for heavy metal ions. Background technique [0002] Wastewater containing heavy metal ions mainly comes from industrial wastewater such as mining, nonferrous metals, electroplating, electrolysis, pesticides, medicine, tobacco, paints, and pigments. Heavy metal ions mainly include all heavy metal ions such as copper, lead, zinc, iron, cobalt, nickel, manganese, cadmium, mercury, tungsten, and molybdenum. Because heavy metal ions cannot be decomposed by themselves, they are easy to accumulate in organisms, disrupting the normal metaboli...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/469C02F1/72C02F101/20
Inventor 王海人王麒钧王麒宁邬杰
Owner 王麒钧
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