JP2006326121A - Chemical substance decomposition agent and cleaning method using thereof - Google Patents

Chemical substance decomposition agent and cleaning method using thereof Download PDF

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JP2006326121A
JP2006326121A JP2005156534A JP2005156534A JP2006326121A JP 2006326121 A JP2006326121 A JP 2006326121A JP 2005156534 A JP2005156534 A JP 2005156534A JP 2005156534 A JP2005156534 A JP 2005156534A JP 2006326121 A JP2006326121 A JP 2006326121A
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hydrogen peroxide
chemical substance
persulfate
silver
present
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Tadahiro Fukai
忠広 深井
Hirohisa Nito
浩久 仁藤
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Adeka Corp
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Adeka Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a chemical substance decomposition agent which effectively decomposes contaminating chemical substance, and to provide a method of cleaning a contaminated matter using the same. <P>SOLUTION: The decomposition agent mainly consists of persulfates such as sodium persulfate, potassium persulfate, and silver ion is blended to this. Thus, the decomposition drug decomposes the chemical substance with a decomposition ratio much higher than a conventional chemical substance decomposition agent mainly consisting of persulfate and hydrogen peroxide. Moreover, when hydrogen peroxide is further blended, the decomposition drug rapidly improves its decomposition ratio of the chemical substance. Moreover, treatment of soil, groundwater, etc. using the chemical substance decomposition agent cleans the soil, groundwater, etc. very effectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、化学物質により汚染された汚染物に添加することによって、当該汚染化学物質を分解することのできる化学物質分解剤、およびこれを用いた汚染物の浄化方法に関するものである。   The present invention relates to a chemical substance decomposing agent capable of decomposing a contaminated chemical substance by adding it to a pollutant contaminated with a chemical substance, and a method for purifying the contaminant using the same.

従来より、洗浄剤などとして半導体工場やクリーニング店(工場)などで広く使用されてきたが、その環境負荷が大きいため、近年はその使用が敬遠されている。   Conventionally, it has been widely used as a cleaning agent in semiconductor factories and cleaning shops (factories), but its use has been avoided in recent years because of its large environmental burden.

しかしながら、すでに使用されたこれらの有機塩素化合物などの化学物質は、土壌や地下水に混入してこれら土壌や地下水を汚染していることが社会問題にもなっている。   However, it has become a social problem that these already used chemical substances such as organochlorine compounds are contaminated in soil and groundwater by mixing them in soil and groundwater.

そこでこれら汚染地下水や汚染土壌を浄化するために、種々の試みが用いられており、特許文献1に記載の発明では汚染物に過硫酸塩を添加するか、または過硫酸塩と共に過酸化水素水を添加することが行われている。   Therefore, various attempts have been used to purify these contaminated groundwater and contaminated soil. In the invention described in Patent Document 1, a persulfate is added to a contaminant, or a hydrogen peroxide solution is added together with a persulfate. Is being added.

しかし、過硫酸塩と過酸化水素併用するだけでは効果が不十分であった。   However, the combined use of persulfate and hydrogen peroxide was insufficient.

特開2002−307049号公報JP 2002-307049 A

従って、本発明の目的は、汚染化学物質の分解が効果的である化学物質分解剤、およびこれを用いた汚染物の浄化方法を提供することにある。   Accordingly, an object of the present invention is to provide a chemical substance decomposing agent that is effective in decomposing pollutant chemical substances, and a method for purifying contaminants using the same.

本発明者らは上記に鑑み鋭意研究の結果本発明に到達した。即ち本発明は、過硫酸塩、および銀イオンを必須の成分として含有することを特徴とする化学物質分解剤である。   The present inventors have reached the present invention as a result of intensive studies in view of the above. That is, the present invention is a chemical substance decomposing agent containing persulfate and silver ions as essential components.

また本発明は、上記の化学物質分解剤に更に過酸化水素を含有することを特徴とする化学物質分解剤である。   The present invention also provides a chemical substance decomposing agent characterized in that the chemical substance decomposing agent further contains hydrogen peroxide.

また本発明は、過硫酸塩が過硫酸アルカリ金属塩である上記の化学物質分解剤である。   Moreover, this invention is said chemical substance decomposing agent whose persulfate is a persulfate alkali metal salt.

また本発明は、化学物質(特に有機塩素化合物)に汚染された汚染物に、上記の化学物質分解剤を添加することを特徴とする、化学物質汚染物の浄化方法である。   The present invention is also a method for purifying chemical contaminants, comprising adding the chemical substance decomposing agent to a contaminant contaminated with a chemical substance (especially an organic chlorine compound).

本発明の効果は、汚染化学物質の分解が効果的である化学物質分解剤、およびこれを用いた汚染物の浄化方法を提供したことにある。   The effect of the present invention is to provide a chemical substance decomposing agent that is effective in decomposing pollutant chemical substances, and a method for purifying contaminants using the same.

本発明に使用される過硫酸塩は、特に限定されるものではなく、例えば、過硫酸アンモニウム、過硫酸リチウム、過硫酸ナトリウム、過硫酸カリウム、過硫酸マグネシウム、過硫酸カルシウム、過硫酸アンモニウムなど、およびこれらから選ばれる1種以上の混合物を使用することができるが、窒素排水を生じずまた本発明の効果の点から、好ましくは過硫酸ナトリウム、過硫酸カリウムがよい。   The persulfate used in the present invention is not particularly limited, and examples thereof include ammonium persulfate, lithium persulfate, sodium persulfate, potassium persulfate, magnesium persulfate, calcium persulfate, ammonium persulfate, and the like. One or more kinds of mixtures selected from the above can be used, but from the viewpoint of the effects of the present invention, no nitrogen drainage is produced, and sodium persulfate and potassium persulfate are preferred.

本発明に使用する銀イオンは特に限定されず1価の銀イオンでも2価の銀イオンでもこれらを併用しても、いずれでもよく、例えば、硝酸銀、硫酸銀などの水溶性銀化合物を用いればよい。   The silver ion used in the present invention is not particularly limited, and may be monovalent silver ion, divalent silver ion, or a combination thereof. For example, if a water-soluble silver compound such as silver nitrate or silver sulfate is used. Good.

本発明の化学物質分解剤は上記の通り過硫酸塩及び銀イオンを必須の成分として含有するものであり、これらの使用割合は特に限定されないが、より効果的な汚染化学物質分解のためには、好ましくは過硫酸塩純分の質量及び銀イオンを生成する水溶性銀化合物の質量を基準として(後述の過酸化水素を併用する場合は、過酸化水素、過酸化水素水、過酸化水素発生剤などの質量をさらに合計する)銀化合物を0.001質量%以上、好ましくは0.1質量%以上とすることがよい。また、極端に銀イオンの量が多いと産業化適正が悪化するだけでなくスラッジを発生しやすくなるので、好ましくは銀化合物は10質量%以下、より好ましくは5質量%以下とするのがよい。   As described above, the chemical substance decomposing agent of the present invention contains persulfate and silver ions as essential components, and the use ratio thereof is not particularly limited, but for more effective decomposing chemical substances. Preferably, based on the mass of pure persulfate and the mass of water-soluble silver compound that generates silver ions (when hydrogen peroxide described later is used in combination, hydrogen peroxide, hydrogen peroxide solution, hydrogen peroxide generation The silver compound is further added in an amount of 0.001% by mass or more, preferably 0.1% by mass or more. In addition, if the amount of silver ions is extremely large, not only industrial suitability deteriorates but sludge is easily generated. Therefore, the silver compound is preferably 10% by mass or less, more preferably 5% by mass or less. .

本発明の化学物質分解剤は、上記過硫酸塩及び銀イオンに加えて更に過酸化水素を配合すると更に汚染化学物質の分解が効果的であり好ましい。   The chemical substance decomposing agent of the present invention is preferably combined with hydrogen peroxide in addition to the above-mentioned persulfate and silver ions, because it is effective in decomposing contaminating chemical substances.

本発明に使用する過酸化水素は特に限定されず、過酸化水素水として使用してもよいし、固体状過酸化水素発生剤を含有させてもよい。   The hydrogen peroxide used in the present invention is not particularly limited, and may be used as a hydrogen peroxide solution or may contain a solid hydrogen peroxide generator.

本発明に使用される固体状過酸化水素発生剤は、水に溶解することで過酸化水素を発生させるものであれば特に限定されるものではなく、例えば、過炭酸アンモニウム,過炭酸リチウム,過炭酸ナトリウム,過炭酸カリウム,過炭酸カルシウム,過炭酸マグネシウムなどの過炭酸塩、過硼酸アンモニウム,過硼酸リチウム,過硼酸ナトリウム,過硼酸カリウム,過硼酸カルシウム,過硼酸マグネシウムなどの過硼酸塩、硫酸リチウム過酸化水素付加物,硫酸ナトリウム過酸化水素付加物,硫酸カリウム過酸化水素付加物などの硫酸アルカリ金属塩過酸化水素付加物、硫酸マグネシウム過酸化水素付加物,硫酸カルシウム過酸化水素付加物などの硫酸アルカリ土類金属塩過酸化水素付加物、尿素過酸化水素付加物、メラミン過酸化水素付加物、ヒスチジン過酸化水素付加物などのアミノ酸過酸化水素付加物、過酸化リチウム,過酸化ナトリウム,過酸化カリウムなどの過酸化アルカリ金属、過酸化マグネシウム,過酸化カルシウムなどの過酸化アルカリ土類金属、およびこれらから選ばれる1種以上の混合物も例示することができる。勿論過酸化水素水との併用も差し支えない。   The solid hydrogen peroxide generator used in the present invention is not particularly limited as long as it generates hydrogen peroxide by being dissolved in water. For example, ammonium percarbonate, lithium percarbonate, hydrogen peroxide, Percarbonates such as sodium carbonate, potassium percarbonate, calcium percarbonate, magnesium percarbonate, ammonium perborate, lithium perborate, sodium perborate, potassium perborate, calcium perborate, perborate such as magnesium perborate, sulfuric acid Lithium hydrogen peroxide adduct, sodium sulfate hydrogen peroxide adduct, potassium sulfate hydrogen peroxide adduct, etc. Alkali metal sulfate hydrogen peroxide adduct, magnesium sulfate hydrogen peroxide adduct, calcium sulfate hydrogen peroxide adduct, etc. Alkaline earth metal sulfate hydrogen peroxide adduct, urea hydrogen peroxide adduct, melamine hydrogen peroxide adduct, Amino acid hydrogen peroxide adducts such as stidine hydrogen peroxide adduct, alkali peroxides such as lithium peroxide, sodium peroxide, potassium peroxide, alkaline earth metals peroxide such as magnesium peroxide, calcium peroxide, and One or more kinds of mixtures selected from these can also be exemplified. Of course, it can be combined with hydrogen peroxide.

これらの固体状過酸化水素発生剤のなかでも、本発明の効果の点から、過炭酸ナトリウム、過炭酸カリウム、過硼酸ナトリウム、過硼酸カリウム、硫酸ナトリウム過酸化水素付加物、硫酸カリウム過酸化水素付加物、硫酸マグネシウム過酸化水素付加物、尿素過酸化水素付加物、メラミン過酸化水素付加物、ヒスチジン過酸化水素付加物、過酸化ナトリウム、過酸化マグネシウム、過酸化カルシウム、およびこれらから選ばれる1種以上の混合物が好ましい。   Among these solid hydrogen peroxide generators, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, sodium sulfate hydrogen peroxide adduct, potassium sulfate hydrogen peroxide from the viewpoint of the effect of the present invention. Adduct, magnesium sulfate hydrogen peroxide adduct, urea hydrogen peroxide adduct, melamine hydrogen peroxide adduct, histidine hydrogen peroxide adduct, sodium peroxide, magnesium peroxide, calcium peroxide, and 1 selected from these A mixture of species or more is preferred.

さらに、過炭酸ナトリウム、過硼酸ナトリウム、硫酸ナトリウム過酸化水素付加物、硫酸マグネシウム過酸化水素付加物、尿素過酸化水素付加物、メラミン過酸化水素付加物、過酸化ナトリウム、過酸化カルシウム、およびこれらから選ばれる1種以上の混合物が好ましい。   Further, sodium percarbonate, sodium perborate, sodium sulfate hydrogen peroxide adduct, magnesium sulfate hydrogen peroxide adduct, urea hydrogen peroxide adduct, melamine hydrogen peroxide adduct, sodium peroxide, calcium peroxide, and these 1 or more types of mixtures chosen from are preferable.

本発明において過酸化水素の使用割合は特に限定されるものではないが、より効果的な化学物質分解効果のためには好ましくは過硫酸塩純分の質量、銀イオンを生成する水溶性銀化合物の質量、及び過酸化水素(過酸化水素水及び/又は過酸化水素発生剤の質量として)の質量を基準として過酸化水素水及び/又は過酸化水素発生剤の質量として0.1質量%以上、より好ましくは1質量%以上とすることがよい。またその上限はとくにないが極端に多いと産業化適正が悪化するだけでなく過硫酸塩の割合を低下させてしまうので、好ましくは60質量%以下、より好ましくは50質量%以下、最も好ましくは20質量%以下とすることがよい。   In the present invention, the ratio of hydrogen peroxide used is not particularly limited, but for a more effective chemical decomposition effect, preferably the mass of pure persulfate, a water-soluble silver compound that generates silver ions 0.1 mass% or more as the mass of hydrogen peroxide solution and / or hydrogen peroxide generator based on the mass of hydrogen peroxide (as the mass of hydrogen peroxide solution and / or hydrogen peroxide generator) More preferably, the content is 1% by mass or more. Further, there is no particular upper limit, but if it is extremely large, not only the industrial suitability deteriorates, but also the ratio of persulfate is reduced. Therefore, it is preferably 60% by mass or less, more preferably 50% by mass or less, and most preferably It is good to set it as 20 mass% or less.

本発明の化学物質分解剤は、上記の他に、本発明の効果を阻害しない範囲内で任意の成分として、貯蔵安定性向上のため過酸化水素安定剤を配合することができ、例えばピロリン酸ナトリウムなどのピロリン酸塩、トリポリリン酸ナトリウムなどのトリポリリン酸塩、EDTA,DTPA,ホスホン酸系キレート剤,リン酸系キレート剤などのキレート剤などを任意に混合して使用することができる。また、排水の低pH化抑制のために重炭酸ナトリウムなのどの重炭酸塩、炭酸ナトリウムなどの炭酸塩を任意に配合することができる。   In addition to the above, the chemical substance decomposing agent of the present invention can contain a hydrogen peroxide stabilizer as an optional component within the range that does not impair the effects of the present invention in order to improve storage stability. Pyrophosphates such as sodium, tripolyphosphates such as sodium tripolyphosphate, chelating agents such as EDTA, DTPA, phosphonic acid-based chelating agents, and phosphoric acid-based chelating agents can be arbitrarily mixed and used. Moreover, carbonates such as sodium bicarbonate, sodium bicarbonate and sodium carbonate can be optionally blended to suppress the pH reduction of the waste water.

本発明の化学物質分解剤は、化学物質の分解に適しており、特にトリクロロエチレン、テトラクロロエチレンなどの有機塩素化合物の分解に適している。例えば、このような化学物質、例えばトリクロロエチレン、テトラクロロエチレンなどの有機塩素化合物を含有する地下水や土壌に対して本発明の化学物質分解剤を添加することによりこれら化学物質を分解することができる。   The chemical substance decomposing agent of the present invention is suitable for decomposing chemical substances, and particularly suitable for decomposing organochlorine compounds such as trichlorethylene and tetrachloroethylene. For example, these chemical substances can be decomposed by adding the chemical substance decomposing agent of the present invention to such chemical substances, for example, groundwater or soil containing organic chlorine compounds such as trichlorethylene and tetrachloroethylene.

本発明の化学物質分解剤は上記の通り過硫酸塩、および銀イオンを必須の成分とし、さらに好ましい成分として過酸化水素を含有するものであるが、上記のような化学物質とこれらの成分が同時に存在すればよいのであり、例えば、過硫酸塩、銀イオンまたは更に過酸化水素を混合した後化学物質に添加して使用してもよいし、化学物質に過硫酸塩を添加した後銀イオンを生成する銀化合物を添加しても、過硫酸塩水溶液を添加した後銀イオンを生成する銀化合物を添加しても、過硫酸塩を添加した後銀イオンを含有する水溶液を添加しても、過硫酸塩水溶液を添加した後銀イオンを含有する水溶液を添加しても、更にこれらの任意の段階で過酸化水素を添加(過酸化水素水でも固体状過酸化水素発生剤でもよい)しても、いずれの方法によって本発明の化学物質分解剤を構成させてもよい。   As described above, the chemical substance decomposing agent of the present invention contains persulfate and silver ions as essential components, and further contains hydrogen peroxide as a more preferable component. For example, persulfate, silver ion or hydrogen peroxide may be added to the chemical substance after adding it, or silver ion after adding the persulfate to the chemical substance. Even if a silver compound that generates silver ion is added, a silver compound that generates silver ions is added after adding an aqueous persulfate solution, or an aqueous solution containing silver ions is added after adding a persulfate salt Even after adding an aqueous solution of persulfate, an aqueous solution containing silver ions may be added, and hydrogen peroxide may be added at any of these stages (either hydrogen peroxide solution or solid hydrogen peroxide generator). But either way Te may be configured chemicals degradation agent of the present invention.

次に本発明の浄化方法について説明する。
本発明の浄化方法は、化学物質に汚染された汚染物に、上記本発明の化学物質分解剤を添加するものである。
Next, the purification method of the present invention will be described.
The purification method of the present invention is to add the chemical substance decomposing agent of the present invention to a contaminant contaminated with a chemical substance.

本発明の浄化方法において好ましく分解することのできる化学物質は、例えばトリクロロエチレン、テトラクロロエチレンなどの有機塩素化合物である。以下では便宜的に有機塩素化合物と標記する。   The chemical substance that can be preferably decomposed in the purification method of the present invention is an organic chlorine compound such as trichloroethylene and tetrachloroethylene. Hereinafter, for the sake of convenience, it is referred to as an organochlorine compound.

本発明の浄化方法に使用する化学物質分解剤は、上記本発明の化学物質分解剤と同義であり、その好ましい態様も同様であるのでここでは説明を省略する。   The chemical substance decomposing agent used in the purification method of the present invention is synonymous with the above-described chemical substance decomposing agent of the present invention, and its preferred embodiment is also the same.

本発明の浄化方法において、上記本発明の化学物質分解剤の添加量は特に限定されるものではないが、極端に少ないと有機塩素化合物の分解効果が希薄となるので好ましくは有機塩素化合物1質量部に対して、本発明の化学物質分解剤中の過硫酸塩、過酸化水素(過酸化水素水及び/又は過酸化水素発生剤の質量として)および銀イオンを生成する銀化合物の合計量として1質量部以上、より好ましくは10質量部以上、更に好ましくは50質量部以上使用することがよい。   In the purification method of the present invention, the addition amount of the chemical substance decomposing agent of the present invention is not particularly limited, but if it is extremely small, the decomposition effect of the organic chlorine compound becomes dilute, and preferably 1 mass of the organic chlorine compound. As a total amount of persulfate, hydrogen peroxide (as a mass of hydrogen peroxide solution and / or hydrogen peroxide generator) and a silver compound that generates silver ions in the chemical substance decomposition agent of the present invention. It is preferable to use 1 part by mass or more, more preferably 10 parts by mass or more, and still more preferably 50 parts by mass or more.

本発明の浄化方法において、上記本発明の化学物質分解剤の添加量の上限は特にないが、極端に多すぎるとコスト面で産業化適正が低下するだけでなく、処理後の排水中に残存する化学物質分解剤の処理や、過硫酸塩の分解により生じた硫酸によって排水pHが低下することに対応するための中和処理が必要となるので、好ましくは有機塩素化合物1質量部に対して、本発明の化学物質分解剤中の過硫酸塩、過酸化水素(過酸化水素水及び/又は過酸化水素発生剤の質量として)および銀イオンを生成する銀化合物の合計量として10000質量部以下、より好ましくは1000質量部以下とすることがよい。   In the purification method of the present invention, there is no particular upper limit on the amount of the chemical substance decomposing agent of the present invention, but if it is too much, not only the industrial suitability decreases in terms of cost, but also remains in the treated waste water. Of the chemical substance decomposing agent and the neutralization treatment to cope with the decrease in drainage pH due to sulfuric acid generated by the decomposition of persulfate, and preferably with respect to 1 part by mass of the organic chlorine compound. 10000 parts by mass or less as the total amount of persulfate, hydrogen peroxide (as the mass of hydrogen peroxide and / or hydrogen peroxide generator) and silver compound producing silver ions in the chemical substance decomposing agent of the present invention More preferably, it is good to set it as 1000 mass parts or less.

本発明の浄化方法において、汚染物への上記本発明の化学物質分解剤の添加方法は特に限定されない。例えば、地下水などの液体汚染物に対しては本発明の化学物質分解剤を添加して均一混合すればよい。温度は特に限定されるものではなく、おおむね0℃〜80℃程度で混合すればよいが、あまり低温であると反応性が低下し、あまり高温であると作業性が悪化するので概ね10〜50℃程度で混合すればよい。   In the purification method of the present invention, the method for adding the chemical substance decomposing agent of the present invention to a contaminant is not particularly limited. For example, the chemical substance decomposing agent of the present invention may be added to liquid contaminants such as groundwater and mixed uniformly. The temperature is not particularly limited and may be mixed at about 0 ° C to 80 ° C. However, if the temperature is too low, the reactivity decreases, and if the temperature is too high, the workability deteriorates. What is necessary is just to mix at about ℃.

汚染物が土壌などの固体状である場合は本発明の化学物質分解剤を土壌に添加して均一に混合すればよいが、好ましくは反応性を高めるためには水分を土壌に含有させてスラリー状態として混合することがよい。勿論最初から土壌が水分を含んでいて容易にスラリー状となる場合や、本発明の化学物質分解剤自体が水溶液である場合は特に水分を添加する必要はない。混合時の温度は液体の場合と同様である。   When the pollutant is in a solid state such as soil, the chemical substance decomposing agent of the present invention may be added to the soil and mixed uniformly. Preferably, in order to increase the reactivity, water is contained in the soil and the slurry is added. It is better to mix as a state. Of course, it is not necessary to add water especially when the soil contains water from the beginning and easily becomes a slurry, or when the chemical substance decomposing agent of the present invention is an aqueous solution. The temperature at the time of mixing is the same as in the case of liquid.

以下に実施例をあげて本発明を更に説明するが本発明はこれらに限定されるものではない。   EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited to these.

過硫酸塩、銀イオン生成剤、および過酸化水素水もしくは過酸化水素発生剤を下記のように配合して本発明の各種化学物質分解剤を調製した。尚、銀イオン生成剤および過酸化水素水(もしくは過酸化水素発生剤)の配合割合は、過硫酸塩および銀化合物及び過酸化水素水ないし過酸化水素発生剤の合計質量を基準とした、それぞれ、銀化合物、過酸化水素水ないし過酸化水素発生剤の配合割合(質量基準)である。   Various chemical substance decomposing agents of the present invention were prepared by blending a persulfate, a silver ion generator, and a hydrogen peroxide solution or a hydrogen peroxide generator as follows. The blending ratio of the silver ion generator and the hydrogen peroxide solution (or hydrogen peroxide generator) is based on the total mass of the persulfate, the silver compound and the hydrogen peroxide solution or the hydrogen peroxide generator, respectively. , Silver compound, hydrogen peroxide solution or hydrogen peroxide generator (ratio of mass).

次に、20ミリリットル容のバイアル瓶に、最終的に全量を10ミリリットルとした場合にトリクロロエチレン濃度が5ミリグラム/リットルとなる量を注入し、そこに表1の各種化学物質分解剤を、同様に1グラム/リットルの濃度となるように添加し、水を加えて全量を10ミリリットルとしたのち、バイアル瓶を密閉し、よく混合して均一にして浄化処理を開始した。処理開始前と24時間後のバイアルのヘッドスペース中に含まれるトリクロロエチレン濃度をGC/MSヘッドスペース法(JIS−K0125)にて測定し、その比較からトリクロロエチレンの分解率を測定した。結果は以下の通りである。   Next, in a 20 milliliter vial, an amount that gives a trichlorethylene concentration of 5 milligrams / liter when the total amount is finally 10 milliliters is injected. The solution was added to a concentration of 1 gram / liter, and water was added to make the total amount 10 ml. Then, the vial was sealed and mixed well to make it uniform, and the purification treatment was started. The trichlorethylene concentration contained in the head space of the vial before the start of treatment and 24 hours later was measured by the GC / MS head space method (JIS-K0125), and the decomposition rate of trichlorethylene was measured from the comparison. The results are as follows.

尚、はじめに過硫酸塩、銀イオン生成剤、および過酸化水素水もしくは過酸化水素発生剤を混合して本発明の化学物質分解剤を調製するのではなく、トリクロロエチレン溶液に対して過硫酸塩、銀イオン生成剤、過酸化水素水もしくは過酸化水素発生剤を順次、或いは順不同で、もしくは同時に、添加した場合でも同様の結果であった。   The persulfate, silver ion generator, and hydrogen peroxide solution or hydrogen peroxide generator are not mixed to prepare the chemical substance decomposing agent of the present invention. Even when the silver ion generator, the hydrogen peroxide solution or the hydrogen peroxide generator was added sequentially, in any order, or simultaneously, the same result was obtained.

〔実施例1〕
過硫酸塩として過硫酸カリウム、銀イオン生成剤として硝酸銀を使用。硝酸銀の配合割合は0.001%とした。分解率は61%であった。
[Example 1]
Uses potassium persulfate as the persulfate and silver nitrate as the silver ion generator. The blending ratio of silver nitrate was 0.001%. The decomposition rate was 61%.

〔実施例2〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硝酸銀を使用。硝酸銀の配合割合は0.01%とした。分解率は63%であった。
[Example 2]
Sodium persulfate is used as the persulfate, and silver nitrate is used as the silver ion generator. The blending ratio of silver nitrate was 0.01%. The decomposition rate was 63%.

〔実施例3〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硝酸銀を使用。硝酸銀の配合割合は0.1%とした。分解率は66%であった。
Example 3
Sodium persulfate is used as the persulfate, and silver nitrate is used as the silver ion generator. The blending ratio of silver nitrate was 0.1%. The decomposition rate was 66%.

〔実施例4〕
過硫酸塩として過硫酸カリウム、銀イオン生成剤として硝酸銀を使用。硝酸銀の配合割合は0.5%とした。分解率は70%であった。
Example 4
Uses potassium persulfate as the persulfate and silver nitrate as the silver ion generator. The blending ratio of silver nitrate was 0.5%. The decomposition rate was 70%.

〔実施例5〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硝酸銀を使用。硝酸銀の配合割合は1%とした。分解率は71%であった。
Example 5
Sodium persulfate is used as the persulfate, and silver nitrate is used as the silver ion generator. The blending ratio of silver nitrate was 1%. The decomposition rate was 71%.

〔実施例6〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硝酸銀を使用。硝酸銀の配合割合は5%とした。分解率は73%であった。
Example 6
Sodium persulfate is used as the persulfate, and silver nitrate is used as the silver ion generator. The proportion of silver nitrate was 5%. The decomposition rate was 73%.

〔実施例7〕
過硫酸塩として過硫酸カリウム、銀イオン生成剤として硫酸銀を使用。硫酸銀の配合割合は1%とした。分解率は70%であった。
Example 7
Uses potassium persulfate as the persulfate and silver sulfate as the silver ion generator. The blending ratio of silver sulfate was 1%. The decomposition rate was 70%.

〔実施例8〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硝酸銀、過酸化水素として35%過酸化水素水を使用。硝酸銀の配合割合は0.5%とした。過酸化水素水の配合割合は10%とした。分解率は95%であった。
Example 8
Sodium persulfate is used as the persulfate, silver nitrate is used as the silver ion generating agent, and 35% hydrogen peroxide is used as the hydrogen peroxide. The blending ratio of silver nitrate was 0.5%. The blending ratio of hydrogen peroxide water was 10%. The decomposition rate was 95%.

〔実施例9〕
過硫酸塩として過硫酸カリウム、銀イオン生成剤として硝酸銀、過酸化水素として35%過酸化水素水を使用。硝酸銀の配合割合は1%とした。過酸化水素水の配合割合は5%とした。分解率は97%であった。
Example 9
Use potassium persulfate as the persulfate, silver nitrate as the silver ion generator, and 35% hydrogen peroxide as the hydrogen peroxide. The blending ratio of silver nitrate was 1%. The blending ratio of hydrogen peroxide water was 5%. The decomposition rate was 97%.

〔実施例10〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硫酸銀、過酸化水素として60%過酸化水素水を使用。硫酸銀の配合割合は5%とした。過酸化水素水の配合割合は1%とした。分解率は96%であった。
Example 10
Sodium persulfate is used as the persulfate, silver sulfate is used as the silver ion generating agent, and 60% hydrogen peroxide is used as the hydrogen peroxide. The blending ratio of silver sulfate was 5%. The blending ratio of hydrogen peroxide water was 1%. The decomposition rate was 96%.

〔実施例11〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硝酸銀、過酸化水素として5%過酸化水素水を使用。硝酸銀の配合割合は1%とした。過酸化水素水の配合割合は10%とした。分解率は94%であった。
Example 11
Sodium persulfate is used as the persulfate, silver nitrate is used as the silver ion generating agent, and 5% hydrogen peroxide water is used as the hydrogen peroxide. The blending ratio of silver nitrate was 1%. The blending ratio of hydrogen peroxide water was 10%. The decomposition rate was 94%.

〔実施例12〕
過硫酸塩として過硫酸ナトリウム、銀イオン生成剤として硝酸銀、過酸化水素として過炭酸ナトリウムを使用。硝酸銀の配合割合は1%とした。過炭酸ナトリウムの配合割合は5%とした。分解率は96%であった。
Example 12
Sodium persulfate is used as the persulfate, silver nitrate is used as the silver ion generating agent, and sodium percarbonate is used as the hydrogen peroxide. The blending ratio of silver nitrate was 1%. The blending ratio of sodium percarbonate was 5%. The decomposition rate was 96%.

〔比較例1〕
過硫酸塩として過硫酸ナトリウムを使用した。銀イオン生成剤の代わりに鉄イオン生成剤として硫酸第一鉄を使用した。硫酸第一鉄の配合割合は1%とした。分解率は57%であった。
[Comparative Example 1]
Sodium persulfate was used as the persulfate. Ferrous sulfate was used as the iron ion generator instead of the silver ion generator. The blending ratio of ferrous sulfate was 1%. The decomposition rate was 57%.

〔比較例2〕
過硫酸塩として過硫酸ナトリウムを使用した。銀イオン生成剤の代わりに銅イオン生成剤として硫酸銅を使用した。硫酸銅の配合割合は1%とした。分解率は56%であった。
[Comparative Example 2]
Sodium persulfate was used as the persulfate. Copper sulfate was used as a copper ion generator instead of the silver ion generator. The blending ratio of copper sulfate was 1%. The decomposition rate was 56%.

Claims (5)

過硫酸塩、および銀イオンを必須の成分として含有することを特徴とする化学物質分解剤。 A chemical substance decomposing agent comprising persulfate and silver ions as essential components. 更に過酸化水素を含有することを特徴とする請求項1に記載の化学物質分解剤。 The chemical substance decomposing agent according to claim 1, further comprising hydrogen peroxide. 過硫酸塩が過硫酸アルカリ金属塩である、請求項1または請求項2に記載の化学物質分解剤。 The chemical substance decomposing agent according to claim 1 or 2, wherein the persulfate is an alkali metal persulfate. 化学物質に汚染された汚染物に、請求項1〜3の何れかに記載の化学物質分解剤を添加することを特徴とする、化学物質汚染物の浄化方法。 A chemical substance decontamination method, comprising adding the chemical substance decomposing agent according to any one of claims 1 to 3 to a pollutant contaminated with a chemical substance. 化学物質が有機塩素化合物である請求項4に記載の浄化方法。

The purification method according to claim 4, wherein the chemical substance is an organic chlorine compound.

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JP2009291668A (en) * 2008-06-02 2009-12-17 Hiroshima Univ Water area environment improving material and its use
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