JP2716271B2 - Sediment sedimentation method - Google Patents
Sediment sedimentation methodInfo
- Publication number
- JP2716271B2 JP2716271B2 JP2417682A JP41768290A JP2716271B2 JP 2716271 B2 JP2716271 B2 JP 2716271B2 JP 2417682 A JP2417682 A JP 2417682A JP 41768290 A JP41768290 A JP 41768290A JP 2716271 B2 JP2716271 B2 JP 2716271B2
- Authority
- JP
- Japan
- Prior art keywords
- sediment
- sand
- component
- eutrophic
- covering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、富栄養化成分を含有す
る底質の覆砂法、さらに詳しくいえば、湖沼や港湾等の
富栄養化を防止する、水質保全、さらには土壌環境の改
善に有効な該底質の覆砂法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sedimentation of sediment containing a eutrophic component, more specifically, to prevent eutrophication of lakes, marshes and harbors, to preserve water quality, and to further improve the soil environment. The present invention relates to a method for sand covering the sediment effective for improvement.
【０００２】[0002]
【従来の技術】湖沼、港湾等の環境保全については、底
質の表層を大量の砂を散布して被覆する方法（以下覆砂
法という）が採用されてきたが、腐食性の底質から溶出
等で生じる窒素成分やリン成分等の富栄養化成分の除去
効果が低く、湖沼や港湾等の富栄養化を阻止しえなかっ
た。2. Description of the Related Art In order to protect the environment of lakes, marshes, harbors, and the like, a method of spraying a large amount of sand on a surface layer of sediment (hereinafter referred to as a sand covering method) has been adopted. The effect of removing eutrophic components such as nitrogen components and phosphorus components generated by elution and the like was low, and eutrophication of lakes, marshes, harbors and the like could not be prevented.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、このような
従来の覆砂法のもつ欠点を克服し、水質保全あるいは土
壌環境の改善のため、湖沼、港湾等における底質からの
窒素成分やリン成分等の富栄養化成分を効率よく吸着、
除去しうる覆砂法を提供することを目的としてなされた
ものである。DISCLOSURE OF THE INVENTION The present invention overcomes the drawbacks of the conventional sand-covering method and aims to conserve water quality or improve the soil environment. Efficient adsorption of eutrophic components such as phosphorus components,
It is intended to provide a removable sand covering method.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、前記の好
ましい特徴を有する覆砂法を開発するために種々研究を
重ねた結果、特定の吸着性無機物質を覆砂法において併
用することにより、すなわち富栄養化成分を含有する底
質の表層を砂層、さらにその上にゼオライト、水砕スラ
グ又はクリストバライトあるいはそれらの混合物より成
る層という順に積層して覆うことにより、その目的を達
成しうることを見出し、この知見に基づいて本発明を完
成するに至った。Means for Solving the Problems The present inventors have conducted various studies to develop a sand covering method having the above-mentioned preferable characteristics, and as a result, have found that a specific adsorptive inorganic substance is used together in the sand covering method. That is, the object can be achieved by laminating and covering the surface layer of the sediment containing the eutrophic component in the order of a sand layer and a layer composed of zeolite, granulated slag or cristobalite or a mixture thereof. This led to the completion of the present invention based on this finding.
【０００５】すなわち、本発明は、少なくとも窒素成分
あるいはリン成分を含む富栄養化成分を含有する底質の
表層を砂で覆い、さらにゼオライト、水砕スラグ及びク
リストバライトの中から選ばれた少なくとも１種の吸着
性無機物質で覆い、該底質より水中へ放出される該富栄
養化成分を吸着させることを特徴とする底質の覆砂法を
提供するものである。[0005] That is, the present invention covers the surface of a bottom sediment containing at least a eutrophic component containing a nitrogen component or a phosphorus component, and further comprises at least one selected from zeolite, granulated slag and cristobalite. The present invention is to provide a method for covering sediment, characterized in that the sediment is covered with an adsorbent inorganic substance and the eutrophic component released into water from the sediment is adsorbed.
【０００６】本発明で処理される底質は、少なくとも窒
素成分あるいはリン成分を含む富栄養化成分を含有する
底質であれば特に制限されず、流入汚水中の懸濁成分や
夏季に増殖した藻類特にアオコ等が沈でんして湖底、海
底、川底などに堆積した泥状物すなわち有機質汚泥が一
般的であるが、特に湖沼や港湾等の閉鎖性水域における
底質に適用すると好結果が得られる。[0006] The sediment to be treated in the present invention is not particularly limited as long as it contains at least a eutrophic component containing a nitrogen component or a phosphorus component. Algae, especially blue water, etc. are settled and muddy matter deposited on the lake bottom, sea floor, river bottom, etc., that is, organic sludge is generally used, but good results can be obtained especially when applied to sediment in closed water bodies such as lakes and marshes and harbors .
【０００７】すなわち、底質は、琵琶湖や霞ゲ浦等のそ
れに代表されるように、水道水として本来維持されるべ
き許容限度を越える水質劣化をもたらすことが問題とな
っているが、これは主として上記したような富栄養化成
分に起因するとされている。[0007] That is, as represented by lake sediments such as Lake Biwa and Lake Kasumigaura, there is a problem in that the quality of the sediment deteriorates beyond the allowable limit which should be maintained as tap water. It is mainly attributed to the eutrophic components as described above.
【０００８】本発明においては、このような底質からの
窒素成分あるいはリン成分等の富栄養化成分が水質の悪
化を招くのを防ぐため、底質の上に先ず砂を散布して覆
い、さらにその上にゼオライト、水砕スラグ及びクリス
トバライトの中から選ばれた少なくとも１種の吸着性無
機物質を好ましくは粉末状で積層して覆うことで有効に
吸着除去することができる。In the present invention, in order to prevent such a eutrophic component such as a nitrogen component or a phosphorus component from the sediment from deteriorating the water quality, sand is first sprayed on the sediment to cover the sediment. Further, at least one kind of adsorbable inorganic substance selected from zeolite, granulated slag and cristobalite is preferably layered and covered in a powder form, so that it can be effectively adsorbed and removed.
【０００９】この覆砂法は砂層と所定の吸着性無機物質
層との少なくとも２層を複合させるものであって、砂層
は底質表層をむらなく完全に覆い尽くし、かつ使用目的
を始め、底質の汚濁度等の性状、底質層の厚さ等に応じ
て、適当な厚さに調整される。This sand-covering method combines at least two layers of a sand layer and a predetermined adsorptive inorganic substance layer. The sand layer completely covers the surface layer of the sediment evenly and begins to be used. The thickness is adjusted to an appropriate value according to the properties such as the turbidity of the material and the thickness of the sediment layer.
【００１０】吸着性無機物質については、前記富栄養化
成分がアンモニア性窒素などの窒素成分に富む場合は、
ゼオライトを多用し、また前記富栄養化成分がリン酸根
等のリン成分に富む場合は、水砕スラグあるいはクリス
トバライトを多用するのが好ましく、有利にはゼオライ
トと、水砕スラグ及びクリストバライトの一方又は両方
との混合物が用いられる。With respect to the adsorptive inorganic substance, when the eutrophic component is rich in a nitrogen component such as ammoniacal nitrogen,
If zeolite is used extensively, and the eutrophic component is rich in phosphorus components such as phosphate groups, it is preferable to use granulated slag or cristobalite extensively.Advantageously, zeolite and one or both of granulated slag and cristobalite are used. And mixtures thereof.
【００１１】また、上記覆砂法の他、砂と所定の吸着性
無機物質層との混合物による覆砂法を用いてもよい。In addition to the above sand-covering method, a sand-covering method using a mixture of sand and a predetermined adsorptive inorganic substance layer may be used.
【００１２】[0012]
【発明の効果】本発明方法によれば、従来の覆砂法によ
る効果、すなわち低コストで底質の流出、拡散や散乱あ
るいは撹乱、あるいは底質汚濁領域の拡大等を阻止しう
ることに加え、所定の吸着性無機物質の性質に合わせ
て、例えばゼオライトについては窒素成分の吸着作用
を、水砕スラグやクリストバライトについてはリン成分
の吸着作用をそれぞれ利用して、湖沼や港湾等における
底質を有効に覆うことにより、その水質保全、さらには
土壌環境の改善を効率的に行うことができる。According to the method of the present invention, in addition to the effect of the conventional sand covering method, that is, it is possible to prevent the outflow, diffusion, scattering or disturbance of the sediment, or the expansion of the sediment polluted area at a low cost. According to the properties of the predetermined adsorptive inorganic substance, for example, utilizing the adsorption effect of nitrogen component for zeolite and the adsorption effect of phosphorus component for granulated slag and cristobalite, sediment in lakes, marshes, harbors, etc. By covering effectively, the water quality can be preserved and the soil environment can be improved efficiently.
【００１３】[0013]
【実施例】実施例１〜４、比較例１、２湖底に堆積し
た、窒素成分、リン成分等で富栄養化された底質に、内
径１０センチメートルの塩化ビニル樹脂管６本を立て、
比較のためその１本は無処理とし、５本は表に示したよ
うに覆層を施し、その１本は比較のため単に砂のみで覆
い、残り４本は砂層とその上に所定の吸着性無機物質の
粉末を散布して吸着性無機物質層を施した。それより１
ケ月経過後、底質あるいは各種覆砂法で施された覆層に
対しすぐ上方の湖水中の富栄養化成分濃度を測定した。
その結果を表１に示す。EXAMPLES Examples 1 to 4, Comparative Examples 1 and 2, Six vinyl chloride resin tubes having an inner diameter of 10 cm are set up on sediment deposited on the bottom of a lake and enriched with nitrogen, phosphorus, etc.
For comparison, one was left untreated and five were coated with a layer as shown in the table, one was simply covered with sand only for comparison, and the remaining four were covered with a layer of sand and a predetermined adsorption. A powder of an absorptive inorganic substance was sprayed to form an adsorptive inorganic substance layer. 1 more than that
After a lapse of five months, the concentration of eutrophic components in the lake water immediately above the sediment or the overlying layer applied by various sand covering methods was measured.
Table 1 shows the results.
【表１】 [Table 1]
Claims (2)
含む富栄養化成分を含有する底質の表層を砂で覆い、さ
らにゼオライト、水砕スラグ及びクリストバライトの中
から選ばれた少なくとも１種の吸着性無機物質で覆い、
該底質より水中へ放出される該富栄養化成分を吸着させ
ることを特徴とする底質の覆砂法。1. A surface layer of a sediment containing a eutrophic component containing at least a nitrogen component or a phosphorus component is covered with sand, and at least one adsorbent inorganic material selected from zeolite, granulated slag and cristobalite. Covered with material,
A method for covering sediment, comprising adsorbing the eutrophic component released into water from the sediment.
スラグ及びクリストバライトの一方又は両方との混合物
である請求項１記載の覆砂法。2. The sand-covering method according to claim 1, wherein the adsorptive inorganic substance is a mixture of zeolite and one or both of granulated slag and cristobalite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2417682A JP2716271B2 (en) | 1990-12-14 | 1990-12-14 | Sediment sedimentation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2417682A JP2716271B2 (en) | 1990-12-14 | 1990-12-14 | Sediment sedimentation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04215900A JPH04215900A (en) | 1992-08-06 |
| JP2716271B2 true JP2716271B2 (en) | 1998-02-18 |
Family
ID=18525749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2417682A Expired - Fee Related JP2716271B2 (en) | 1990-12-14 | 1990-12-14 | Sediment sedimentation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2716271B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPO589697A0 (en) * | 1997-03-26 | 1997-04-24 | Commonwealth Scientific And Industrial Research Organisation | Sediment remediation process |
| KR100423414B1 (en) * | 1999-08-10 | 2004-03-19 | 주식회사 포스코 | A method for purifying water and sediment pollutants by using basic oxygen furnace slags |
| KR100435429B1 (en) * | 1999-08-10 | 2004-06-10 | 주식회사 포스코 | A method for inhibiting contaminants-liberation from sediments |
| JP5070667B2 (en) * | 2000-12-14 | 2012-11-14 | Ｊｆｅスチール株式会社 | Underwater environment improvement method |
| JP4997687B2 (en) * | 2001-03-21 | 2012-08-08 | Ｊｆｅスチール株式会社 | How to improve water environment |
| KR100815844B1 (en) * | 2001-12-22 | 2008-03-21 | 주식회사 포스코 | A treatment method of dredging sediment |
| JP5135533B2 (en) * | 2007-01-19 | 2013-02-06 | 新日鐵住金株式会社 | Method for suppressing phosphorus elution from marine sediment |
| CN103469762B (en) * | 2013-09-13 | 2016-02-10 | 上海海洋大学 | A kind of active barrier system of in-situ control surface water body substrate sludge nitrogen Phosphurus release and method |
| JP6411840B2 (en) * | 2014-09-30 | 2018-10-24 | 太平洋セメント株式会社 | Nitrogen and phosphorus insolubilizing material, and method for insolubilizing nitrogen and phosphorus in soil using the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146576A (en) * | 1974-10-21 | 1976-04-21 | Asahi Chemical Ind | JUKINZOKUOSEN HEDOROSHORIKOHO |
| JPS5660700A (en) * | 1979-10-23 | 1981-05-25 | Kazumi Yamaoka | Sludge treating method |
| JPS6291298A (en) * | 1985-10-15 | 1987-04-25 | Penta Ocean Constr Co Ltd | Method for promoting sedimentation of reclamation sludge |
-
1990
- 1990-12-14 JP JP2417682A patent/JP2716271B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04215900A (en) | 1992-08-06 |
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