JP2003093999A5 - - Google Patents

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JP2003093999A5
JP2003093999A5 JP2001290322A JP2001290322A JP2003093999A5 JP 2003093999 A5 JP2003093999 A5 JP 2003093999A5 JP 2001290322 A JP2001290322 A JP 2001290322A JP 2001290322 A JP2001290322 A JP 2001290322A JP 2003093999 A5 JP2003093999 A5 JP 2003093999A5
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dioxins
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【特許請求の範囲】
【請求項1】 固形物中に含有されるダイオキシン類を分解して無害化する際に、
前記ダイオキシン類を含有する固形物と水とから成るスラリーに、酸素酸塩を添加すると共に、
アルカリ性または酸性に保持した前記スラリーに攪拌を施しつつ、含有ダイオキシン類を脱塩素反応または生じるヒドロキシラジカルによって分解できるように、前記スラリーに紫外線を照射することを特徴とするダイオキシン類含有固形部の処理方法。
【請求項2】 前記固形物に含有されるダイオキシン類が、主としてポリクロロジベンゾ−パラ−ジオキシンからなり、塩素数が7個以上のポリクロロジベンゾフランの含有量が、塩素数が8個のポリクロロジベンゾ−パラ−ジオキシンの含有量の1/10以下であるとき、前記スラリーをアルカリ性として、前記ポリクロロジベンゾ−パラ−ジオキシンを脱塩素反応によって分解し得る波長の紫外線を照射することを特徴とする請求項1記載のダイオキシン類含有固形部の処理方法。
【請求項3】 前記固形物に含有されるダイオキシン類が、主としてポリクロロジベンゾフランからなり、塩素数が8個のポリクロロジベンゾ−パラ−ジオキシンの含有量が、塩素数が7個以上のポリクロロジベンゾフランの含有量の1/2以下であるとき、前記スラリーを酸性として、紫外線を照射して生じるヒドロキラジカルによって前記ポリクロロジベンゾフランを分解することを特徴とする請求項1記載のダイオキシン類含有固形部の処理方法。
【請求項4】 固形物中に含有されるダイオキシン類を分解して無害化する際に、
前記ダイオキシン類を含有する固形物と水とから成り、酸素酸塩が添加されたスラリーを、アルカリ性に保持すると共に、攪拌を施しつつ、含有ダイオキシン類を脱塩素反応によって分解し得る波長の紫外線を前記スラリーに照射し、
次いで、前記紫外線照射を施して得た紫外線照射スラリーを、攪拌しつつ酸性に保持すると共に、生じるヒドロキラジカルによって残存含有ダイオキシン類を分解し得るように、前記紫外線照射スラリーに紫外線を照射することを特徴とするダイオキシン類含有固形部の処理方法。
【請求項5】 固形物中に含有されるダイオキシン類を分解して無害化する際に、
前記ダイオキシン類を含有する固形物と水とから成り、酸素酸塩が添加されたスラリーを、攪拌しつつ酸性に保持すると共に、生じるヒドロキラジカルによって含有ダイオキシン類を分解し得るように、前記スラリーに紫外線を照射し、
次いで、前記紫外線照射を施して得た紫外線照射スラリーをアルカリ性に保持すると共に、前記紫外線照射スラリーに攪拌を施しつつ、残存ダイオキシン類を脱塩素反応によって分解し得る波長の紫外線を前記紫外線照射スラリーに照射することを特徴とするダイオキシン類含有固形部の処理方法。
【請求項6】 酸素酸塩として、金属酸素酸塩を用いる請求項1〜5のいずれか一項記載のダイオキシン類含有固形部の処理方法。
【請求項7】 酸素酸塩として、過硫酸塩を用いる請求項1〜5のいずれか一項記載のダイオキシン類含有固形部の処理方法。
【請求項8】 照射する紫外線として、波長が300〜587nmの紫外線を用いる請求項1〜7のいずれか一項記載のダイオキシン類含有固形部の処理方法。
【請求項9】 紫外線を照射する際にスラリーを攪拌する攪拌手段として超音波を用いる請求項1〜8のいずれか一項記載のダイオキシン類含有固形部の処理方法。
【請求項10】 固形物中に含有されるダイオキシン類を分解して無害化するダイオキシン類含有固形部の処理装置であって、
前記ダイオキシン類を含有する固形物と水とから成るスラリーを貯留し、該スラリーを攪拌する攪拌機を有した調整槽と、
該調整槽に貯留されたスラリーに、酸素酸塩を投入する投入手段と、
前記調整槽に貯留されたスラリーをアルカリ性または酸性に保持するpH保持手段と、
pH調整されたスラリーに含有されているダイオキシン類を脱塩素反応または生じるヒドロキシラジカルによって分解できるように、前記スラリーに紫外線を照射する紫外線照射手段と前記pH調整されたスラリーを攪拌する攪拌手段が設けられた紫外線照射槽と、
前記スラリーを前記調整槽と前記紫外線照射槽とで循環させる循環手段とを具備することを特徴とするダイオキシン類含有固形部の処理装置。
【請求項11】 前記紫外線照射手段として波長が300〜587nmの紫外線ランプを用いる請求項10記載のダイオキシン類含有固形部の処理装置。
【請求項12】 前記攪拌手段として、超音波を用いる請求項10または11記載のダイオキシン類含有固形部の処理装置。
[Claims]
When detoxifying dioxins contained in a solid material to make them harmless,
While adding an oxyacid salt to a slurry comprising the solid containing dioxins and water,
A process for treating a dioxin-containing solid portion , which comprises irradiating the slurry with ultraviolet rays so that the dioxins contained therein can be decomposed by a dechlorination reaction or a generated hydroxy radical while stirring the slurry kept alkaline or acidic. Method.
2. The dioxins contained in the solid material are mainly composed of polychlorodibenzo-para-dioxin, and the content of polychlorodibenzofuran having 7 or more chlorine atoms is polychlorodibenzofuran having 8 or more chlorine atoms. dibenzo - para - when dioxin is 1/10 or less of the content of, the slurry was made alkaline, the poly-chloro dibenzo - characterized by irradiating dioxin the ultraviolet rays having a wavelength capable of being decomposed by dechlorination - para The method for treating a dioxin-containing solid part according to claim 1.
3. The dioxins contained in the solid material are mainly composed of polychlorodibenzofuran, and the content of polychlorodibenzo-para-dioxin having 8 chlorine atoms is polychlorodibenzo-para-dioxin having 7 or more chlorine atoms. when it is 1/2 or less of the content of dibenzofuran, the slurry was acidified, containing dioxins according to claim 1, wherein the hydroxy radicals generated by ultraviolet irradiation, characterized in that decompose the poly-chloro-dibenzofuran Solid part treatment method.
4. When detoxifying dioxins contained in a solid material to make them harmless,
The slurry containing the dioxin-containing solid and water, and the oxyacid salt-added slurry is kept alkaline, and while stirring, ultraviolet rays having a wavelength capable of decomposing the dioxins by a dechlorination reaction. Irradiating the slurry,
Next, the ultraviolet irradiation slurry obtained by performing the ultraviolet irradiation is kept acidic while stirring, and the ultraviolet irradiation slurry is irradiated with ultraviolet rays so that the remaining dioxins can be decomposed by generated hydroxyl radicals. A method for treating a dioxin-containing solid part, which is a feature.
5. When detoxifying dioxins contained in a solid substance to make them harmless,
The slurry containing the dioxin-containing solid and water, and the oxyacid salt added slurry is kept acidic while stirring, and the resulting dioxins can be decomposed by the generated hydroxyl radical. Irradiate with ultraviolet light,
Next, while maintaining the ultraviolet irradiation slurry obtained by performing the ultraviolet irradiation to be alkaline, and stirring the ultraviolet irradiation slurry, ultraviolet rays having a wavelength capable of decomposing residual dioxins by a dechlorination reaction are applied to the ultraviolet irradiation slurry. A method for treating a dioxin-containing solid portion, which comprises irradiating the solid portion.
6. The method for treating a dioxin-containing solid part according to claim 1, wherein a metal oxyacid salt is used as the oxyacid salt.
7. The method for treating a solid portion containing dioxins according to claim 1, wherein a persulfate is used as the oxyacid salt.
8. The method for treating a dioxin-containing solid part according to claim 1, wherein ultraviolet light having a wavelength of 300 to 587 nm is used as the ultraviolet light to be irradiated.
9. The method for treating a dioxin-containing solid part according to claim 1, wherein ultrasonic waves are used as stirring means for stirring the slurry when irradiating the ultraviolet rays.
10. A dioxin-containing solid treatment apparatus for decomposing dioxins contained in a solid to render it harmless,
An adjustment tank having a stirrer for storing a slurry comprising the solid containing dioxins and water and stirring the slurry,
Charging means for charging the oxyacid salt to the slurry stored in the adjustment tank,
PH holding means for holding the slurry stored in the adjustment tank in an alkaline or acidic state,
Ultraviolet irradiation means for irradiating the slurry with ultraviolet light and stirring means for stirring the pH-adjusted slurry are provided so that dioxins contained in the pH-adjusted slurry can be decomposed by a dechlorination reaction or a generated hydroxyl radical. UV irradiation tank,
An apparatus for treating a dioxin-containing solid portion, comprising: a circulating unit that circulates the slurry in the adjustment tank and the ultraviolet irradiation tank.
11. The apparatus for treating a dioxin-containing solid part according to claim 10, wherein an ultraviolet lamp having a wavelength of 300 to 587 nm is used as said ultraviolet irradiation means.
12. The apparatus for treating a dioxin-containing solid portion according to claim 10, wherein an ultrasonic wave is used as the stirring means.

すなわち、本発明は、固形物中に含有されるダイオキシン類を分解して無害化する際に、前記ダイオキシン類を含有する固形物と水とから成るスラリーに、酸素酸塩を添加すると共に、アルカリ性または酸性に保持した前記スラリーに攪拌を施しつつ、含有ダイオキシン類を脱塩素反応または生じるヒドロキシラジカルによって分解できるように、前記スラリーに紫外線を照射することを特徴とする。これによりダイオキシン類を高い除去率で分解除去することができる。
上記処理方法において、前記固形物に含有されるダイオキシン類が、主としてポリクロロジベンゾ−パラ−ジオキシンからなり、塩素数が7個以上のポリクロロジベンゾフランの含有量が、塩素数が8個のポリクロロジベンゾ−パラ−ジオキシンの含有量の1/10以下であるとき、前記スラリーをアルカリ性として、前記ポリクロロジベンゾ−パラ−ジオキシンを脱塩素反応によって分解し得る波長の紫外線を照射するとダイオキシン類を高い除去率で分解除去することができる。
That is, when the present invention decomposes and renders harmless the dioxins contained in the solid, the oxyacid salt is added to the slurry composed of the solid containing the dioxins and water, and the alkalinity is added. Alternatively, the slurry is irradiated with ultraviolet rays so that the dioxins contained therein can be decomposed by a dechlorination reaction or a generated hydroxyl radical while stirring the slurry kept acidic. As a result, dioxins can be decomposed and removed at a high removal rate.
In the above-mentioned treatment method , the dioxins contained in the solid material mainly consist of polychlorodibenzo-para-dioxin, and the content of polychlorodibenzofuran having 7 or more chlorine atoms is reduced to polychlorodibenzofuran having 8 chlorine atoms. dibenzo - when is 1/10 or less of the content of dioxin, the slurry was alkalinized, the poly chlorodibenzo - - para irradiation then dioxins ultraviolet wavelength capable of decomposing by dechlorination reaction dioxin - para It can be decomposed and removed at a high removal rate.

また、上記処理方法において、前記固形物に含有されるダイオキシン類が、主としてポリクロロジベンゾフランからなり、塩素数が8個のポリクロロジベンゾ−パラ−ジオキシンの含有量が、塩素数が7個以上のポリクロロジベンゾフランの含有量の1/2以下であるとき、前記スラリーを酸性として、紫外線を照射して生じるヒドロキラジカルによって前記ポリクロロジベンゾフランを分解することによって、ダイオキシン類を高い除去率で分解除去することができる。このようにダイオキシン類の含有量に注目して限定したのは、ポリクロロジベンゾ−パラ−ジオキシンとポリクロロジベンゾフランの最適な分解条件が異なることと、特に他と比較して7塩素体ジベンゾフランの分解反応が成され難く、毒性も8塩素体ジベンゾ−パラ−ジオキシンの毒性よりも100倍ほど高いからである。 Further, in the above-mentioned treatment method, the dioxins contained in the solid matter are mainly composed of polychlorodibenzofuran, and the content of polychlorodibenzo-para-dioxin having eight chlorine atoms is seven or more chlorine atoms. when it is 1/2 or less of the content of the poly-chloro-dibenzofuran, the slurry was acidified, by decomposing said polychlorotrifluoroethylene dibenzofurans by hydroxy radicals generated by ultraviolet irradiation, decompose dioxins at a high removal rate Can be removed. The reason for limiting the content of dioxins in this manner was that the optimum conditions for decomposing polychlorodibenzo-para-dioxin and polychlorodibenzofuran were different, and that the decomposition of 7-chlorinated dibenzofuran was particularly superior to the others. This is because the reaction is difficult to be performed and the toxicity is about 100 times higher than the toxicity of 8-chlorinated dibenzo-para-dioxin.

また、本発明は、固形物中に含有されるダイオキシン類を分解して無害化する際に、前記ダイオキシン類を含有する固形物と水とから成り、酸素酸塩が添加されたスラリーを、アルカリ性に保持すると共に、攪拌を施しつつ、含有ダイオキシン類を脱塩素反応によって分解し得る波長の紫外線を前記スラリーに照射し、次いで、前記紫外線照射を施して得た紫外線照射スラリーを、攪拌しつつ酸性に保持すると共に、生じるヒドロキラジカルによって残存含有ダイオキシン類を分解し得るように、前記紫外線照射スラリーに紫外線を照射することを特徴とする。 Further, the present invention, when detoxifying the dioxins contained in the solids to make them harmless, the slurry comprising the solids containing the dioxins and water, to which the oxyacid salt is added, the alkaline, While stirring, the slurry is irradiated with ultraviolet rays having a wavelength capable of decomposing the contained dioxins by a dechlorination reaction , and then the ultraviolet irradiation slurry obtained by performing the ultraviolet irradiation is acidified while stirring. And irradiating the ultraviolet irradiation slurry with ultraviolet light so that the remaining hydroxyl-containing dioxins can be decomposed by the generated hydroxyl radical .

さらに、本発明で、固形物中に含有されるダイオキシン類を分解して無害化する際に、前記ダイオキシン類を含有する固形物と水とから成り、酸素酸塩が添加されたスラリーを、攪拌しつつ酸性に保持すると共に、生じるヒドロキラジカルによって含有ダイオキシン類を分解し得るように、前記スラリーに紫外線を照射し、次いで、前記紫外線照射を施して得た紫外線照射スラリーをアルカリ性に保持すると共に、前記紫外線照射スラリーに攪拌を施しつつ、残存ダイオキシン類を脱塩素反応によって分解し得る波長の紫外線を前記紫外線照射スラリーに照射することを特徴とする。
これら処理方法により、ポリクロロジベンゾ−パラ−ジオキシン、ポリクロロジベンゾフランはもちろんのことコプラナーPCBをも高い除去率で分解除去することができる。
Further, in the present invention, when the dioxins contained in the solid are decomposed and made harmless, the slurry comprising the solid containing the dioxins and water, to which the oxyacid salt is added, is stirred. While maintaining the acidity, while irradiating the slurry with ultraviolet rays so that the dioxins contained can be decomposed by the generated hydroxyl radicals , and then maintaining the ultraviolet irradiation slurry obtained by performing the ultraviolet irradiation alkalinity, While stirring the ultraviolet irradiation slurry, the ultraviolet irradiation slurry is irradiated with ultraviolet rays having a wavelength capable of decomposing residual dioxins by a dechlorination reaction .
By these treatment methods, coplanar PCB as well as polychlorodibenzo-para-dioxin and polychlorodibenzofuran can be decomposed and removed at a high removal rate.

本発明は、固形物中に含有されるダイオキシン類を分解して無害化するダイオキシン類含有固形部の処理装置であって、前記ダイオキシン類を含有する固形物と水とから成るスラリーを貯留し、該スラリーを攪拌する攪拌機を有した調整槽と、該調整槽に貯留されたスラリーに、酸素酸塩を投入する投入手段と、前記調整槽に貯留されたスラリーをアルカリ性または酸性に保持するpH保持手段と、pH調整されたスラリーに含有されているダイオキシン類を脱塩素反応または生じるヒドロキシラジカルによって分解できるように、前記スラリーに紫外線を照射する紫外線照射手段と前記pH調整されたスラリーを攪拌する攪拌手段が設けられた紫外線照射槽と、前記スラリーを前記調整槽と前記紫外線照射槽とで循環させる循環手段とを具備することを特徴とする。これにより効率良く処理可能な処理装置を提供することができる。
また、紫外線照射手段としては、波長が300〜587nmの紫外線ランプが使用でき、攪拌手段としては、超音波を用いるとよい。
The present invention is a treatment device for a dioxin-containing solid portion that decomposes and detoxifies dioxins contained in a solid, and stores a slurry comprising the solid containing dioxins and water, An adjusting tank having a stirrer for stirring the slurry, a charging unit for charging an oxyacid salt to the slurry stored in the adjusting tank, and a pH maintaining for maintaining the slurry stored in the adjusting tank in an alkaline or acidic state. Means, UV irradiation means for irradiating the slurry with UV light, and stirring to stir the pH-adjusted slurry so that dioxins contained in the pH-adjusted slurry can be decomposed by dechlorination reaction or generated hydroxyl radicals. an ultraviolet irradiation tank means is provided, and circulating means for circulating the slurry between the ultraviolet irradiation vessel and the control vessel immediately Characterized in that it. This makes it possible to provide a processing device capable of performing processing efficiently.
Further, as the ultraviolet irradiation means, an ultraviolet lamp having a wavelength of 300 to 587 nm can be used, and as the stirring means, ultrasonic waves may be used.

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JP2007021347A (en) 2005-07-14 2007-02-01 Idemitsu Kosan Co Ltd Hardly decomposable substance-containing water treatment method
CA2615963A1 (en) 2005-07-28 2007-02-01 Idemitsu Kosan Co., Ltd. Method of detoxification treatment for filter with persistent substance adhering thereto
DK1980296T3 (en) * 2005-12-28 2014-03-24 Esri Co Ltd Process for the preparation of substances contaminated with organic chemicals
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JPH06285453A (en) * 1993-03-31 1994-10-11 Nippon Steel Corp Treatment of waste containing dioxin
JPH11300334A (en) * 1998-04-20 1999-11-02 Kubota Corp Decomposing and removing method of organic chlorine compound such as dioxins in soil
JP2000233173A (en) * 1998-12-14 2000-08-29 Mitsubishi Heavy Ind Ltd Apparatus and method for decomposition treatment of organohalogen compound
JP2000176409A (en) * 1998-12-21 2000-06-27 Mitsubishi Heavy Ind Ltd Contaminant treating device
JP2000254619A (en) * 1999-03-11 2000-09-19 Chiyoda Corp Treatment of solid and waste gas, containing dioxins
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JP2001137803A (en) * 1999-11-11 2001-05-22 Mitsubishi Heavy Ind Ltd Method for treating incineration ash and apparatus for the same
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