Electrocatalysis particle for treating cyanide-containing waste water and method for treating cyanide-containing waste water

A technology of catalytic particles and electrocatalysis, which is applied in the field of water treatment, can solve the problems of low current efficiency, high operating cost, and insufficient economy of electrolysis, and achieve the effects of low preparation cost, high mechanical strength, and improved treatment efficiency

Active Publication Date: 2011-04-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the total cyanide concentration at the outlet of the factory is often lower than 200mg / L. Under the condition of this concentration, the electrolysis method has low current efficiency and high power consumption, and the operating cost is higher than that of the bleaching powder chemical oxidation method, which is not economical.

Method used

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  • Electrocatalysis particle for treating cyanide-containing waste water and method for treating cyanide-containing waste water
  • Electrocatalysis particle for treating cyanide-containing waste water and method for treating cyanide-containing waste water
  • Electrocatalysis particle for treating cyanide-containing waste water and method for treating cyanide-containing waste water

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Embodiment 1

[0028] Calculated by weight percentage, with 42% activated carbon as the matrix, 14% iron oxide, 23% copper oxide, 4.5% manganese oxide, 1.2% zinc oxide, 0.6% zirconia, 0.7% cerium oxide as the initiator, and 14% wood Calcium sulfonate is used as the binder and mixed with water, then extruded and cut into pellets, then air-dried, and finally heated and carbonized and activated for 3 hours under the condition of 470°C and anoxic, and made into particles with a particle size of 4-6mm. Electrocatalytic particles for cyanide removal.

[0029] The synthesized electrocatalytic pellets for cyanide removal are subjected to an air flow rate of 1000L / h, a pulsed DC voltage of 30V, a pH of 9.5, a volume of cyanide-containing wastewater of 200L, and a reaction time of 5, 10, 15, 20, 15, and 30 minutes respectively. Under the conditions, to the cyanide concentration being 196mg / L waste water, carry out gap type static experiment ( figure 2 ); and under the same conditions, with the treat...

Embodiment 2

[0031] Under the condition of the same electrocatalytic particle for cyanide removal (electrocatalytic particle of the present invention), and at an air flow rate of 1000L / h, the treatment capacity is 200L / hr, the mass ratio of electrocatalytic particle to waste water is 1:2, and the waste water is The residence time in the catalytic cell is 30 minutes, the cathode electrode material in the electrocatalytic cell is stainless steel, the anode electrode material is graphite, the distance between the electrodes is 60cm, and the applied pulse DC voltage of the electrodes is 30 volts. Under conditions, the cyanide-containing wastewater is treated (total cyanide concentration 170-200mg / L, pH 9.0-11.0), respectively adopting a wastewater treatment device (electrocatalytic particle circulation cleaning device) as used in Chinese patent CN200920263896.7, and adopting Compared with the traditional device (without the function of electrocatalyst particle circulation cleaning), the on-site...

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Abstract

The invention relates to an electrocatalysis particle for treating cyanide-containing waste water and a method for treating cyanide-containing waste water, belonging to the field of water treatment. The electrocatalysis particle comprises the following components in mass percentage: 40-44% of activated carbon, 14-19% of bonding agent, 13-16% of iron oxides, 22-25% of copper oxides, 4-7% of magnesium oxides, 1-1.5% of zinc oxides, 0.5-1% of zirconium oxides and 0.5-1% of cerium oxides. The electrocatalysis particle provided by the invention has low preparation cost and high mechanical strength, and the treatment efficiency of the electrocatalysis particle on cyanide-containing waste water is greatly improved as compared with the traditional catalysis particle. In the invention, the electrocatalysis particle is placed in an electrocatalysis device capable of recycling and cleaning the particle, the new electrocatalysis particle and a waste water treatment device capable of cleaning the electrocatalysis particle in place are organically combined to treat cyanide-containing waste water, and the best cooperative treatment effect is obtained by organically combining various treatment parameters. When the concentration of total cyanide is lower than 200 mg / L, the removal rate of cyanide-containing pollutants is greater than 60% by using the method of the invention, the power consumption for treating each ton of waste water is generally 1500-2000 W, and the operating cost is lower than 2.3 RMB. The invention has the advantages of investment saving, low energy consumption, low maintenance expense, fewer sludge amount, no secondary pollution and broad application prospect.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to an electrocatalytic granule for treating cyanide-containing wastewater and a method for treating cyanide-containing wastewater, in particular to a preparation of catalyst packing and a continuous air-lift cleaning material granule A three-dimensional electrode catalytic oxidation method for treating cyanide-containing wastewater. Background technique [0002] A large amount of cyanide-containing wastewater is discharged in the production processes of non-ferrous metal minerals extraction of gold, silver and copper, cyanide electroplating, chemical industry, coking and other industries. Cyanide is a highly toxic chemical. Whether in cities or remote mountainous areas, the discharge of cyanide-containing wastewater must strictly control its discharge concentration in accordance with the discharge standards set by the National Environmental Protection Agency, otherwise it will cause har...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F1/72C02F101/18
Inventor 陈卫国周德鸿陈超举张玉霞张荣嫄朱锡海
Owner SUN YAT SEN UNIV
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