JP4038380B2 - Dioxin decomposition method - Google Patents
Dioxin decomposition method Download PDFInfo
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- JP4038380B2 JP4038380B2 JP2002053979A JP2002053979A JP4038380B2 JP 4038380 B2 JP4038380 B2 JP 4038380B2 JP 2002053979 A JP2002053979 A JP 2002053979A JP 2002053979 A JP2002053979 A JP 2002053979A JP 4038380 B2 JP4038380 B2 JP 4038380B2
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- JP
- Japan
- Prior art keywords
- dioxins
- gold ion
- ion solution
- incineration
- decomposition method
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- 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.)
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Description
【０００１】
【発明の属する技術分野】
本発明は、ダイオキシン類の分解処理方法に関する。
【０００２】
【従来の技術】
ポリ塩化シベンゾ−パラ−ジオキシン、ポリ塩化ベンゾフラン、コプラナ−ポリクロロビフェニルに代表されるダイオキシン類は、青酸カリよりも毒性が強く、人工物質としては最も猛毒であり、多量の暴露では生殖機能、甲状腺機能、免疫機能への影響および発癌性があると言われている。
このようなダイオキシン類は、ポリ塩化ビニルに代表される有機塩素化合物や、食塩や色素などを含む生ゴミを焼却した際に焼却温度が低かったり、不完全燃焼などにより発生するため、焼却炉の温度管理などが非常に難しく、完全に発生を防止できていないのが現状である。したがって、ごみ焼却場の焼却灰中には、どうしてもこのダイオキシン類が含まれており、焼却炉の排ガスを集塵機に通し、焼却灰がごみ焼却場の周囲に飛散しないようにしている。
【０００３】
しかし、集めた焼却灰をそのまま埋め立てることができず、ごみ焼却場の周囲に飛散しないようにしても、集めた焼却灰が廃棄物として多量に残るためその処分に非常にコストがかかる。
すなわち、現在提唱されているダイオキシン類の分解処理方法としては、高温焼却法が一般的であるが、高温にしなければならないため、燃料が多量に必要で処理コストがかかり過ぎるとともに、高温に耐える炉が必要で設備コストの点でも問題がある。
【０００４】
【発明が解決しようとする課題】
本発明はこのような事情に鑑みて、低コストでダイオキシン類を容易に分解できるダイオキシン類の分解処理方法を提供することを目的としている。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、本発明にかかるダイオキシン類の分解処理方法は、ダイオキシン類に金イオンを含む金イオン溶液を作用させてダイオキシン類を分解することを特徴としている。
【０００６】
本発明において、金イオン溶液は、金がイオン化されていれば特に限定されないが、できるだけ装置を傷めたり環境へ影響を与えたりしないよにするには、請求項２のように、金イオン溶液のｐＨを６．０〜８．０の中性域付近にすることが好ましい。
【０００７】
金イオン溶液をダイオキシン類に作用させるとは、特に限定されないが、例えば、ダイオキシン類によって汚染された土壌やダイオキシン類を含む焼却灰に散布する方法、ダイオキシン類によって汚染された土壌やダイオキシン類を含む焼却灰を処理容器中の金イオン溶液と撹拌混合したのちろ過する方法、ダイオキシン類が付着した煙道等の構築物の壁面に金イオン溶液を直接噴霧する方法等を実施することをいう。
【０００８】
【実施例】
以下に、本発明の実施例を説明するが、本発明はその主旨を逸脱しない限り以下の実施例に限定されない。
【０００９】
（実施例１）
ダイオキシン類が総計で２７ｎｇ／ｇ含まれる奈良県で採取した焼却土１００ｋｇをパレット上に敷きつめ、金イオン濃度が１ｐｐｍ、ｐＨ７．０の金イオン水溶液を２０リットル上方から全体に満遍なく散布し、３日間放置した。その後、土を採取して、ダイオキシン類の含有量を測定したところ、ダイオキシン類が総計で０．７５ｎｇ／ｇと減少していた。また、ダイオキシン類として最も毒性が強いとされている２，３，７，８−ＴＣＤＤは０．５ｐｇ／ｇ（毒性等価１）と極めて低いものであった。
【００１０】
すなわち、上記実施例によれば、本発明の分解処理方法を用いれば、金イオン溶液を少量作用させるだけで、ダイオキシン類が容易に分解処理できることがよくわかる。
なお、ダイオキシン類の定量は、ダイオキシン類に係る土壌調査測定マニュアル（平成１２年１月環境庁水質保全局土壌農業課）に準じた測定方法で行なった。
【００１１】
【発明の効果】
本発明にかかるダイオキシン類の分解処理方法は、以上のように、ダイオキシン類に金イオンを含む金イオン溶液を作用させるだけで、簡単にダイオキシン類を分解処理することができる。
しかも、従来のように高温処理する必要がなく、燃料費や設備コストが低減できる。
【００１２】
また、請求項２のようにすれば、処理設備を傷めたりすることがなく、しかも、廃液の処理コストがかからず、金イオン溶液による公害等を招く恐れもない。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for decomposing dioxins.
[0002]
[Prior art]
Dioxins typified by polychlorinated sibenzo-para-dioxins, polychlorinated benzofurans, and coplanar polychlorinated biphenyls are more toxic than potassium cyanide, and are the most highly toxic as an artificial substance. It is said to have an effect on immune function and carcinogenicity.
Such dioxins are generated when incineration of organic chlorine compounds typified by polyvinyl chloride, garbage including salt and pigments, etc. is caused by low incineration temperature or incomplete combustion. The current situation is that temperature management is very difficult, and the generation is not completely prevented. Therefore, the incineration ash at the garbage incineration plant inevitably contains these dioxins, and the exhaust gas from the incinerator is passed through the dust collector so that the incineration ash is not scattered around the waste incineration plant.
[0003]
However, even if the collected incineration ash cannot be landfilled as it is and does not scatter around the garbage incineration plant, the collected incineration ash remains as a large amount of waste, so that disposal is very expensive.
That is, as a currently proposed decomposition method for dioxins, a high-temperature incineration method is generally used. However, since the high-temperature incineration method has to be performed at a high temperature, a large amount of fuel is required, the processing cost is excessive, and a furnace that can withstand high temperatures. However, there is a problem in terms of equipment cost.
[0004]
[Problems to be solved by the invention]
In view of such circumstances, an object of the present invention is to provide a method for decomposing dioxins that can easily decompose dioxins at low cost.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the method for decomposing dioxins according to the present invention is characterized in that dioxins are decomposed by applying a gold ion solution containing gold ions to the dioxins.
[0006]
In the present invention, the gold ion solution is not particularly limited as long as gold is ionized. However, in order to avoid damaging the apparatus and affecting the environment as much as possible, It is preferable that the pH is in the vicinity of the neutral range of 6.0 to 8.0.
[0007]
The action of the gold ion solution on dioxins is not particularly limited, but includes, for example, a method of spraying on soil contaminated with dioxins or incinerated ash containing dioxins, and soil or dioxins contaminated with dioxins. A method in which incinerated ash is stirred and mixed with a gold ion solution in a processing container and then filtered, or a method in which a gold ion solution is directly sprayed on the wall surface of a structure such as a flue to which dioxins are attached is carried out.
[0008]
【Example】
Examples of the present invention will be described below, but the present invention is not limited to the following examples without departing from the gist thereof.
[0009]
Example 1
100 kg of incinerated soil collected in Nara Prefecture with a total of 27 ng / g of dioxins is placed on a pallet, and a gold ion aqueous solution with a gold ion concentration of 1 ppm and pH 7.0 is spread evenly over the entire 20 liters for 3 days. I left it alone. Then, when soil was extract | collected and content of dioxins was measured, dioxins were reducing with 0.75 ng / g in total. Moreover, 2,3,7,8-TCDD, which is considered to be the most toxic as dioxins, was extremely low at 0.5 pg / g (toxic equivalent 1).
[0010]
That is, according to the above examples, it is well understood that dioxins can be easily decomposed by applying a small amount of gold ion solution by using the decomposition processing method of the present invention.
Dioxins were quantified by a measurement method according to the soil survey and measurement manual for dioxins (Soil Agriculture Division, Environment Agency, Water Quality Conservation Bureau, January 2000).
[0011]
【The invention's effect】
As described above, the method for decomposing dioxins according to the present invention can easily decompose dioxins simply by allowing a gold ion solution containing gold ions to act on the dioxins.
In addition, it is not necessary to perform high temperature treatment as in the prior art, and fuel costs and equipment costs can be reduced.
[0012]
Further, according to the second aspect, the processing equipment is not damaged, the waste liquid processing cost is not incurred, and there is no possibility of causing pollution due to the gold ion solution.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002053979A JP4038380B2 (en) | 2002-02-28 | 2002-02-28 | Dioxin decomposition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002053979A JP4038380B2 (en) | 2002-02-28 | 2002-02-28 | Dioxin decomposition method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003253244A JP2003253244A (en) | 2003-09-10 |
| JP4038380B2 true JP4038380B2 (en) | 2008-01-23 |
Family
ID=28665257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002053979A Expired - Fee Related JP4038380B2 (en) | 2002-02-28 | 2002-02-28 | Dioxin decomposition method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4038380B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3932335B2 (en) * | 1999-03-18 | 2007-06-20 | 独立行政法人産業技術総合研究所 | Integrated catalyst and method for producing the same |
| JP4024999B2 (en) * | 1999-08-09 | 2007-12-19 | 月島環境エンジニアリング株式会社 | Treatment method of dioxin-containing liquid |
| JP2001321785A (en) * | 2000-05-17 | 2001-11-20 | Osaka Gas Co Ltd | Method for treating dioxins in liquid |
| JP2003096449A (en) * | 2001-09-25 | 2003-04-03 | Harumi Sangyo Kk | Soil improving method for farm |
-
2002
- 2002-02-28 JP JP2002053979A patent/JP4038380B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003253244A (en) | 2003-09-10 |
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