JPH10230283A - Copper ion absorbing device and absorbing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recover copper ion by arranging iron or a carrier containing iron in a flow passage of a water to be treated containing copper ion. SOLUTION: A water 2 in a fish breading water tank 1 provided with a copper ion supply device is passed through a copper ion absorbing tank 4 from an overflow opening 3 and discharged through an overflow opening 5. Iron made filaments 6 are irregularly bundled and packed in the copper ion absorbing tank 4 and copper ion in the water to be treated which is brought into contact with iron in the copper ion absorbing tank 4 is decreased by exchanging iron for copper. As a result, copper ion is recovered from the water to be treated to enable to discharge as a waste water, adverse effect on the water environment is eliminated or at least reduced. Particularly, for example, <=1ppm copper ion supplied for sterilization or insecticide or the prevention of the sticking of algae or shell to a cooling pipe line wall in a fish farm is recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for absorbing copper ions in water, which are used for protecting the water environment and for recovering and recycling copper.

[0002]

2. Description of the Related Art Conventionally, copper ions are known as a factor that affects organisms in water, and are used for treating fish diseases and for preventing aquatic organisms such as shellfish and algae from adhering to water sampling channels.
However, at present, the supplied copper ions are discarded without being recovered, and this may cause pollution of the water environment. 50 pp for the treatment of white spot insects on marine fish
Copper ion of about b is effective, but abalone larvae are 100P
Exposure to copper ions of Pb is known to cause death, and even 50 ppb has a considerable effect. Therefore, it is desirable to recover copper ions used for treatment, disease prevention, and the like. Further, a precise recovery method such as ion exchange resin or electrodeposition is not suitable for treating a large amount of water in terms of cost and maintenance.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention aims to provide an apparatus and a method for easily recovering supplied copper ions.

[0004]

Means for Solving the Problems The inventor of the present invention has completed the present invention by conducting ion exchange with iron, which is the most common, easily available, and inexpensive iron among the developments for solving the above problems. That is, the present invention is a copper ion absorbing device, wherein iron or a carrier containing iron is arranged in a flow path of the water to be treated containing copper ions.

The above-mentioned copper ion absorbing device is particularly effective when the concentration of copper ions in the water to be treated is 1 ppm or less.

Further, the present invention proposes a method for adsorbing copper ions by disposing iron or a carrier containing iron in the flow path of the water to be treated containing copper ions.

[0007]

When the copper ions come into contact with the iron, the copper ions are reduced and the copper adheres to the iron surface. Therefore, when iron or a carrier containing iron is disposed in the flow path of the water to be treated containing copper ions, the copper ions in the water to be treated are absorbed. Instead, iron ions are eluted, but iron ions have low toxicity and are contained in a large amount in the environment, so that they have almost no adverse effect on the environment.

If the contact area of iron with the water to be treated is large, the absorption rate can be easily increased. If the copper ion concentration is high, the surface of the iron is immediately covered with copper, and the absorption efficiency is rapidly deteriorated.
This is particularly effective when the copper ion is as low as 1 ppm or less.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applicable to water to be treated containing various copper ions such as plating waste liquid, etching waste liquid, waste liquid for controlling microorganisms and pests, and cooling water drainage added with copper ions for preventing adhesion of shellfish. Is done. No special equipment or power supply is required, as only iron is brought into contact with the water to be treated. It is efficient to arrange iron or a carrier containing iron so that a large contact area can be obtained and a channel is secured so as to cover the entire cross section. More specifically, if the filamentous iron is bundled irregularly with gaps and arranged so as to close the flow path, the water to be treated flows through the gaps between the filaments, so that the contact efficiency is good. Even if the surface of the iron is oxidized, there is no practical problem since the water to be treated permeates the iron oxide and comes into contact with the iron.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in accordance with embodiments. FIG. 1 shows a sectional view of an embodiment of the present invention. The water 2 in the fish tank 1 provided with the copper ion supply device passes through the copper ion absorption tank 4 from the overflow port 3 and is discharged through the overflow port 5. Iron filaments 6 are irregularly bundled and packed in the copper ion absorption tank 4. In the liquid to be treated, which comes into contact with iron in the copper ion absorption tank, iron and copper are exchanged and copper ions are reduced.

The present invention is not limited to the above-described embodiment. For example, even if a special copper ion absorption tank is not provided, a contact area between iron or a carrier containing iron and the water to be treated is ensured in the drainage pit. It may be provided in a state. The iron does not need to be pure iron, and may be an alloy with another metal, or may be a mixture of iron powder and plastic and formed into particles having a diameter of about 2 to 5 mm.

[0012]

According to the present invention, copper ions can be recovered from the water to be treated and drained, so that adverse effects on the water environment can be eliminated or at least reduced. Especially at a low concentration of 1 ppm or less, the recovery cost was high and the recovery was practically difficult. The collection of ions became possible.

[Brief description of the drawings]

FIG. 1 shows a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fish tank 2 Water 3 Overflow port 4 Copper ion absorption tank 5 Overflow port 6 Iron filament

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/70 C02F 1/70 A

Claims (4)

[Claims] 1. A copper ion absorbing apparatus, wherein iron or a carrier containing iron is arranged in a flow path of the water to be treated containing copper ions. 2. The copper ion absorbing device according to claim 1, wherein the concentration of copper ions in the water to be treated is 1 ppm or less. 3. The copper ion absorbing device according to claim 2, wherein the copper ions are supplied to the water to be treated for sterilization, insecticidal, algicidal or shellfish killing. 4. A method for adsorbing copper ions by disposing iron or a carrier containing iron in the flow path of the water to be treated containing copper ions.