Three-dimensional electro-fenton water treatment method

A technology of water treatment and three-dimensional electricity, which is applied in the direction of sterilization/microdynamic water/sewage treatment, etc., can solve the problems that the efficiency cannot meet the industrial application, and achieve the effect of effective recovery, high efficiency, and overcoming environmental pollution

Active Publication Date: 2014-07-23
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, Fenton technology is mainly divided into homogeneous Fenton oxidation technology and heterogeneous Fenton oxidation technology according to the type of catalyst used. Among them, homogeneous Fenton oxidation technology has strong oxidation ability and high treatment efficiency, but the most important disadvantage is The reaction requires a large amount of Fe 2+ , requires follow-up treatment and produces a large amount of iron-containing sludge; in order to solve this problem, the heterogeneous Fenton oxidation technology has been developed, and the purpose of reducing the dissolution of iron ions is achieved by loading active components or oxides on the surface of the carrier. But so far, the efficiency of the developed heterogeneous Fenton catalysts still cannot meet the needs of industrial applications

Method used

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  • Three-dimensional electro-fenton water treatment method

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Effect test

Embodiment 1

[0024] a. The activated carbon particles prepared from coconut shells were pickled and washed with water, then dried for later use, and ferric nitrate solution with 0.05 mol / L of zero-valent metal was prepared, and the dried active carbon was added to the ferric nitrate solution, stirred for 2 hours, and left to stand Settled, removed the supernatant, added 50 mL of pure water to wash and repeated 3 times, dried the loaded activated carbon at a temperature of 120 °C, and reduced the dried activated carbon in a hydrogen atmosphere reduction furnace at a temperature of 300 °C in a hydrogen atmosphere, and stored in Standby in the dust-free test bench;

[0025] b. Equivalent arrangement of Ti / Sb-SnO in reactor 1 2 Porous electrode plate 2, Ti / Sb-SnO 2 The spacing between the porous electrode plates 2 is 2 cm, in Ti / Sb-SnO 2 Between the porous electrode plates 2 is placed a catalyst 3 that uses activated carbon to support zero-valent metal iron in step a to form a combination of...

Embodiment 2

[0031]a. The activated carbon granules prepared from apricot shells were pickled and washed with water, then dried for later use, and a copper nitrate solution with 0.05 mol / L of zero-valent metal was prepared, and the dried activated carbon was added to the copper nitrate solution, stirred for 2 hours, and left to stand Settled, removed the supernatant, added 50 mL of pure water to wash and repeated 3 times, dried the loaded activated carbon at a temperature of 120 °C, and reduced the dried activated carbon in a hydrogen atmosphere reduction furnace at a temperature of 300 °C in a hydrogen atmosphere, and stored in Standby in the dust-free test bench;

[0032] b, in the reactor 1, there are titanium mesh porous electrode plates 2 equally arranged, the spacing between the titanium mesh porous electrode plates 2 is 2 cm, and step a is placed between the titanium mesh porous electrode plates 2 to load zero with activated carbon. Catalyst 3 of valence metal copper nitrate forms a...

Embodiment 3

[0038] a. The activated carbon powder prepared from petroleum coke is pickled and washed with water, then dried for later use, and a nickel nitrate solution of 0.05 mol / L of zero-valent metal is prepared, and the dried activated carbon is added to the nickel nitrate solution, and after stirring for 2 hours, the Settled for sedimentation, removed the supernatant, added 50 mL of pure water to wash and repeated 3 times, dried the loaded activated carbon at a temperature of 120 °C, and reduced the dried activated carbon in a hydrogen atmosphere reduction furnace at a temperature of 300 °C in a hydrogen atmosphere, and stored Standby in a dust-free laboratory bench;

[0039] B, be provided with the stainless steel plate porous electrode plate 2 that equally arranges in reactor 1, the spacing between the stainless steel plate porous electrode plate 2 is 2 cm, between the stainless steel plate porous electrode plate 2, be placed with step a to load with activated carbon The catalyst ...

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Abstract

The invention relates to a three-dimensional electro-fenton water treatment method. According to the method, an involved device comprises a reactor, a porous electrode plate, an active carbon loaded zero-valent metal fenton catalyst, a water outlet, a water inlet, a positive electrode and a negative electrode; a reaction area is divided into a positive electrode electro-fenton oxidation area and a negative electrode ion reduction area through a reaction device by taking a three-dimensional intensifying electro-fenton oxidation method as a kernel, an electrode material comprises active carbon loaded zero-valent metal ion, nickel, copper, cobalt, platinum and silver or palladium, inlet water passes through the positive electrode electro-fenton oxidation area, metal ions are digested under the action of an electric field to form an area high-concentration ion solution to intensify homogeneous-phase fenton reaction; a reacted water body enters a negative pole reduction area, and the metal ions contained in the solution are reduced to a cathodic active carbon electrode for recovery; and the negative electrode ion reaction area can generate hydrogen peroxide through oxygen aeration, so that the usage amount of added hydrogen peroxide is reduced. A dyeing waste water treatment result indicates that the method disclosed by the invention can outstandingly increase the chrominance and removal efficiency of CODCr (Chemical Oxygen Demand) of dyeing waste water and achieves the national industrial waste water recycling standard of effluent water.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and relates to a three-dimensional electro-Fenton water treatment method. Background technique [0002] Fenton oxidation technology is a high-efficiency water treatment technology for rapid oxidation and removal of organic pollutants, and has broad application prospects. At present, Fenton technology is mainly divided into homogeneous Fenton oxidation technology and heterogeneous Fenton oxidation technology according to the type of catalyst used. Among them, homogeneous Fenton oxidation technology has strong oxidation ability and high treatment efficiency, but the most important disadvantage is The reaction requires a large amount of Fe 2+ , requires follow-up treatment and produces a large amount of iron-containing sludge; in order to solve this problem, the heterogeneous Fenton oxidation technology has been developed, and the purpose of reducing the dissolution of iron ions is achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467
Inventor 朱云庆王传义殷娇王朋磊
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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