JPH05263420A - Outflow preventing method for trace element material - Google Patents

Abstract

PURPOSE:To prevent a trace element material from flowing to the outside of a processing/accumulating area by arranging an absorbent on a shielding structure placed around the refuse processing/accumulating area, and adsorbing the trace element material from the refuse into the adsorbent. CONSTITUTION:Dual steel sheet piles 1 are placed on a base rock 3 around a refuse processing/accumulating area. Foundation riprap 4 and miscellaneous stone banking sections 5, 6 are formed outside the steel sheet piles 1, and a cover stone section 7 is formed on the foundation riprap 4. An adsorbent 8 is inserted into the gap between the steel sheet piles 1. The trace element material eluted from the refuse processing area is prevented from flowing out to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing outflow of trace element substances. More specifically, the present invention relates to the outflow of trace element substances as a new environmental conservation technology capable of effectively preventing outflow of trace element substances from the accumulation area of various wastes such as industrial wastes to the outside. It relates to prevention methods.

[0002]

[Prior art and its problems] With the increasing interest in protecting the global environment, there is a strong demand for more advanced deployment of so-called pollution control technology, and the treatment of waste that cannot be avoided with the development of resources and industry. As for the above, it is necessary to realize technology with higher performance and efficiency than ever before.

[0003] For example, industrial waste, resource waste such as coal after resource utilization has been conventionally reclaimed from the sea. For example, as shown in FIG. After laying so that it reaches the bedrock (c) of (a), embankment (cut stone) (d), and after forming a revetment,
Waste is landfilled in the area surrounded by this seawall. Usually, in the joint part of the steel sheet pile (a) in the rubble embankment (d), seawater freely passes through the gap so that the water level inside and outside the steel sheet pile (a) becomes the same. Therefore, the water pressure difference due to the tide does not occur in the steel sheet pile (a).

However, although securing of a waste accumulation area by means of this steel sheet pile is recognized as effective as a method of land reclamation, on the other hand, this method prevents the outflow of trace element substances from the waste. There is a problem that you can not.
In other words, in the method using this steel sheet pile, when rainwater penetrates into the ground and comes into contact with the waste in the treatment plant, trace element substances contained in the waste are eluted, and this trace amount changes as the tide changes. There is a problem that elemental substances inevitably flow out of the region after passing through the joints of steel sheet piles. Therefore, As, Cr (hexavalent), Cd, Hg, N
It is not possible to prevent the transfer of elemental substances such as i, which are industrially useful and whose harmfulness may pose a problem in some cases, to the social and living environment.

Therefore, the present invention solves the drawbacks of the conventional sea surface landfilling methods as described above, and provides a new method capable of effectively preventing the outflow of trace element substances from wastes to the outside of the treatment and accumulation area. It is intended to be provided.

[0006]

In order to solve the above problems, the present invention arranges an adsorbent on a shielding structure that is placed around a waste processing area, and disposes of the adsorbent. Provided is a method for preventing the outflow of a trace element substance by adsorbing a trace element substance from an object to prevent the trace element substance from flowing out of the region.

That is, the present invention makes use of the characteristics of the sea surface landfilling method, and at the same time, it is possible to effectively prevent the outflow of the trace element substances, which is a drawback of the conventional method, to the steel sheet pile. It is characterized by adopting a structure in which an adsorbent is disposed on a steel pipe, an embankment portion, or other various types of shielding structures. Trace element substances from wastes eluted in groundwater are adsorbed by the adsorbent when passing through a shielding structure such as a steel sheet pile according to the present invention.
It does not flow out of the processing area. Various methods can be used for disposing the adsorbent for this purpose. For example, as the shielding structure, various types such as a steel sheet pile, a steel pipe, a concrete unit, etc. are used, and an adsorbent is arranged in a joint portion, a gap, a predetermined hole portion or the like. More specifically, it is conceivable to use a double steel sheet pile and insert an adsorbent into the gap. In any of the methods, the adsorbent used can be exchangeable or disposable, granular, plate-shaped,
Alternatively, various shapes such as a sheet shape can be used. A typical example of this adsorbent is activated carbon. Further, an adsorbent made of a chelate substance, a polymer carrier thereof, or the like can be appropriately used.

As described above, the present invention completely overcomes the disadvantage that it is impossible to prevent the leakage of a trace amount of substances in the case of only the shielding structure, by disposing the adsorbent. In addition, on the other hand, since the trace element substance adsorbed and recovered by the adsorbent has a considerably high concentration, it is naturally possible to recover and reuse valuable elemental substances as useful resources.

Hereinafter, the method of the present invention will be described in more detail with reference to examples.

[0010]

EXAMPLE FIG. 2 illustrates a method using a double steel sheet pile and an adsorbent as a method of the present invention.
FIG. 3 shows an AA cross section of the steel sheet pile of FIG. For example, as illustrated in FIGS. 2 and 3,
In the present invention, a double steel sheet pile (1) is cast toward the bedrock (3) of the seabed (2) so as to surround the waste collection area, that is, the necessary portion thereof. Rubbing and embankment are performed on the outside of the heavy steel sheet pile (1) to form, for example, a foundation rubble part (4) and a rubble embankment part (5) (6). A covering stone portion (7) is formed on the foundation rubble portion (4).

In this structure, the adsorbent (8) is inserted between the double steel sheet piles (1), that is, in the gap between the steel sheet piles (1a) and (1b). 4 to 9 show this construction method in the order thereof. That is, first, a double steel sheet pile (1) is driven toward the bedrock (3) of the seabed (2) at a predetermined place in the waste disposal area (FIG. 4). Next, after forming a rubble embankment part (5) on the outside of this double steel sheet pile (1) (Fig. 5), it is further embanked to form a foundation rubble part (4) (Fig. 6).

After constructing the retaining wall (9) (Fig. 7), further forming a rubble embankment (6) to construct a revetment (Fig. 8), and finally, between the double steel sheet piles (1). The adsorbent (8) is inserted and filled (FIG. 9). By this construction method, trace element substances eluted from the waste in the treatment accumulation area are efficiently adsorbent (8)
Since it can be adsorbed by the method, it is possible to effectively prevent the outflow of the trace element substances to the outside in securing the processing area of the waste by the sheet pile method.

Since this adsorbent can be easily collected and regenerated, it can be maintained and useful elemental resources can be collected. Of course, this method can be applied under the surface of the water. The steel sheet pile (1
Even if seawater or the like passes through the joint part (10) of (a) and (1b), the trace element substance is adsorbed by the adsorbent (8) to prevent outflow. At this time, as for the adsorbent, as shown in FIG.
Various modes such as inserting and filling between the steel sheet piles (1a) and (1b) are possible as 1).

FIG. 11 shows another embodiment. In this meter, the rubble stones are thrown into the bedrock (12) to form the rubble stone layer (13), the upper concrete (14) is placed, and together with the covering stone (15), the sandproof sheet (16)
And the soil with belly (17) is arranged, and the double steel sheet pile (18) and the adsorbent (19) are placed and inserted. In any of these examples, other than the double steel sheet pile illustrated above,
For example, as shown in FIG. 12, the adsorbent (21) may be arranged at the joint portion of the steel pipe (20), or the adsorbent sheet may be arranged, so that an appropriate mode is possible.

Further, the method of the present invention is not limited to the landfill of waste materials. It is also useful for preventing the outflow of trace element substances from the treatment accumulation area on land.

[0016]

As described above in detail, according to the present invention, it is possible to prevent the outflow of the trace element substances eluted from the waste treatment area to the outside of the area, and to prevent the outflow as a maintenance-friendly method.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional construction method.

FIG. 2 is a sectional view showing the method of the present invention.

FIG. 3 is a cross-sectional view of a double steel sheet pile and adsorbent filling showing the method of the present invention.

FIG. 4 is a cross-sectional view illustrating the order of execution of the method of the present invention.

FIG. 5 is a cross-sectional view exemplifying a construction sequence of the method of the present invention.

FIG. 6 is a cross-sectional view illustrating the order of execution of the method of the present invention.

FIG. 7 is a cross-sectional view illustrating the construction sequence of the method of the present invention.

FIG. 8 is a cross-sectional view illustrating the order of execution of the method of the present invention.

FIG. 9 is a cross-sectional view showing the construction sequence of the method of the present invention.

FIG. 10 is a sectional view showing a steel sheet pile and adsorbent filling as another embodiment of the present invention.

FIG. 11 is a construction sectional view showing another embodiment of the present invention.

FIG. 12 is a cross-sectional view showing an example using a steel pipe.

[Explanation of symbols]

 1 Double steel sheet pile 2 Seabed 3 Bedrock 4 Foundation rubble part 5,6 Rubble embankment part 7 Cover stone part 8 Adsorbent 9 Retaining wall 10 Joint part 11 Sheet adsorbent 12 Bedrock 13 Rubble layer 14 Upper concrete 15 Cover stone 16 Sand protection Sheet 17 Soil with belly 18 Double steel sheet pile 19 Adsorbent 20 Steel pipe 21 Adsorbent

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuji Ozaki 2-17-3 Shibuya, Shibuya-ku, Tokyo Aoki Construction Co., Ltd.

Claims (1)

[Claims] 1. An adsorbent is disposed in a shielding structure section that is installed around the waste treatment accumulation area, and the adsorbent adsorbs trace element substances from the waste to remove the trace element substances out of the area. A method for preventing the outflow of trace element substances, which is characterized by preventing outflow.