US 6,605,203 B1Granted

Electrode apparatus

AssigneeAgency of Industrial Science and Technology

InventorNorio Nakayama

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Abstract

There is disclosed an electrode apparatus, which comprises an electrode (1) composed of a conductor through which perforations (2) are formed from a surface to a backing surface, wherein when the conductor is maintained at an electric potential sufficient to cause an oxidation or reduction reaction to occur in substances to be treated (3) of a solution entered from an inlet of the perforation and passed through inside the perforation, the substances to be treated are captured or rendered harmless by their oxidation or reduction reaction inside the perforation, and the solution whose concentration is lowered is diffused from an outlet of the perforations. Accordingly to the electrode apparatus, it is possible to prevent leakage and/or diffusion of hazardous or harmful substances into the ambient environment in the event of breakage of equipment, such as a waste disposal landfill, by setting the electrode apparatus around the equipment and by capturing the hazardous or harmful substances, or rendering them harmless by their redox reaction.

Claims19

Dependent claims

An electrode apparatus, comprising an electrode composed of a conductor through which perforations are formed from a surface to a backing surface and said perforations having a length (depth) capable of causing the oxidation or reduction reaction so that substances inside the perforations are treated,

a reference electrode, and
a counter electrode,
wherein the reference electrode and counter electrode are connected to the electrode composed of the conductor through an electric source, and the electrode composed of the conductor is set in a conductive environment selected from the group consisting of soil and an aqueous solution, and
wherein when the conductor is maintained at an electric potential capable of causing an oxidation or reduction reaction to occur in substances to be treated of a solution entered from an inlet of the perforations and passed through inside the perforations, by setting the electric potential of the electrode composed of the conductor, to an electric potential that is greater than or less than the equilibrium electric potential of the oxidation or reduction reaction by 0.4-0.5 V or more where the electric potential in the case of conducting the oxidation reaction is greater than the equilibrium electric potential and where the electric potential in the case of conducting the reduction reaction is lower than the equilibrium electric potential, the substances to be treated are captured or rendered harmless by their oxidation or reduction reaction inside the perforations and the treated solution is diffused from an outlet of the perforations.

1 more element

An electrode apparatus, comprising

an electrode composed of a conductor through which perforations are formed from a surface to a backing surface, and said perforations have a length (depth) capable of causing the oxidation or reduction reaction to enable substances to be treated inside the perforations,
a reference electrode, and
a counter electrode,
wherein the reference electrode and counter electrode are connected to the electrode composed of the conductor through an electric source, and the electrode composed of the conductor is set in a conductive environment selected from the group consisting of soil and an aqueous solution, and wherein
wherein the perforations have length and radius satisfying the following expression (7a), and
wherein when the conductor is maintained at an electric potential capable of causing an oxidation or reduction reaction to occur in substances to be treated of a solution entered from an inlet of the perforations and passed through inside the perforations by setting the electric potential of the electrode composed of the conductor, to an electric potential that is greater than or less than the equilibrium electric potential of the oxidation or reduction reaction by 0.4-0.5 V or more where the electric potential in the case of conducting the oxidation reaction is greater than the equilibrium electric potential and where the electric potential in the case of conducting the reduction reaction is lower than the equilibrium electric potential, the substances to be treated are captured or rendered harmless by their oxidation or reduction reaction inside the perforations, and the treated solution whose concentration is lowered to the concentration lower than C(r, Zo) is diffused from an outlet of the perforations;
Zo/Ro≧(1/2.4048)loge(C(r,0)/C(r,Zo)) (7a)
wherein,
r represents a radius distant from the axis of a center point within an inlet of the perforation;
Ro represents the radius of the perforation;
Zo represents the length of the perforation;
C(r, Zo) represents the material concentration at the outlet of the perforation;
C(r,0) represents the material concentration at the inlet of the perforation.

10 more elements

Dependencies are inferred from the claim text.