JP2003136051A - Metal powder for decomposing organic halogen compound and method for cleaning soil using the same - Google Patents
Metal powder for decomposing organic halogen compound and method for cleaning soil using the sameInfo
- Publication number
- JP2003136051A JP2003136051A JP2001336808A JP2001336808A JP2003136051A JP 2003136051 A JP2003136051 A JP 2003136051A JP 2001336808 A JP2001336808 A JP 2001336808A JP 2001336808 A JP2001336808 A JP 2001336808A JP 2003136051 A JP2003136051 A JP 2003136051A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- metal powder
- powder
- phase
- organic halogen
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 170
- 239000002184 metal Substances 0.000 title claims abstract description 168
- 239000000843 powder Substances 0.000 title claims abstract description 159
- 150000002896 organic halogen compounds Chemical class 0.000 title claims abstract description 72
- 239000002689 soil Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004140 cleaning Methods 0.000 title abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 52
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 47
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000011572 manganese Substances 0.000 claims abstract description 28
- 239000002923 metal particle Substances 0.000 claims abstract description 21
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 16
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000354 decomposition reaction Methods 0.000 claims description 37
- 239000003673 groundwater Substances 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000002352 surface water Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010953 base metal Substances 0.000 abstract description 34
- 238000002156 mixing Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 230000002085 persistent effect Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 44
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical group ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 9
- KFUSEUYYWQURPO-UPHRSURJSA-N cis-1,2-dichloroethene Chemical compound Cl\C=C/Cl KFUSEUYYWQURPO-UPHRSURJSA-N 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- UBOXGVDOUJQMTN-UHFFFAOYSA-N 1,1,2-trichloroethane Chemical compound ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 3
- 230000001464 adherent effect Effects 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 2
- LGXVIGDEPROXKC-UHFFFAOYSA-N 1,1-dichloroethene Chemical group ClC(Cl)=C LGXVIGDEPROXKC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- -1 for example Chemical compound 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000004045 organic chlorine compounds Chemical class 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UOORRWUZONOOLO-OWOJBTEDSA-N (E)-1,3-dichloropropene Chemical compound ClC\C=C\Cl UOORRWUZONOOLO-OWOJBTEDSA-N 0.000 description 1
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- ZAIDIVBQUMFXEC-UHFFFAOYSA-N 1,1-dichloroprop-1-ene Chemical compound CC=C(Cl)Cl ZAIDIVBQUMFXEC-UHFFFAOYSA-N 0.000 description 1
- ZPQOPVIELGIULI-UHFFFAOYSA-N 1,3-dichlorobenzene Chemical compound ClC1=CC=CC(Cl)=C1 ZPQOPVIELGIULI-UHFFFAOYSA-N 0.000 description 1
- YJLUBHOZZTYQIP-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=N2 YJLUBHOZZTYQIP-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001295 No alloy Inorganic materials 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- UOORRWUZONOOLO-UHFFFAOYSA-N telone II Natural products ClCC=CCl UOORRWUZONOOLO-UHFFFAOYSA-N 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Removal Of Specific Substances (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、土壌、河川水、地
下水、大気等の環境を汚染している汚染物質の一つであ
る有機ハロゲン化合物を、高速度で分解することのでき
る有機ハロゲン化合物分解用金属粉に関する。TECHNICAL FIELD The present invention relates to an organohalogen compound capable of decomposing at a high speed an organohalogen compound which is one of pollutants polluting the environment such as soil, river water, groundwater and the atmosphere. Dissolving metal powder.
【０００２】[0002]
【従来の技術】近年、テトラクロロエチレン（以下、Ｐ
ＣＥと記載する。）、トリクロロエチレン（以下、ＴＣ
Ｅと記載する。）、ジクロロエチレン（以下、ＤＣＥと
記載する。）等の有機塩素化合物に代表される有機ハロ
ゲン化合物による土壌および地下水等の汚染が顕在化
し、一つの社会問題としても取り上げられている。そし
て、これらの有機ハロゲン化合物浄化方法については種
々のものが考案されている。例えば、特開平７−１７８
３９５号公報には、微生物による好気または嫌気分解処
理の方法が記載されている。また例えば、特開平７−１
４４１３７号公報には、光触媒による酸化分解処理の方
法が記載されている。さらに例えば、前記特開平１１−
２３５５７７号公報には、海綿状を有する特殊鉄粉（以
下、特殊鉄粉と記載する。）による還元的分解処理の方
法が記載されている。2. Description of the Related Art In recent years, tetrachloroethylene (hereinafter referred to as P
It is described as CE. ), Trichlorethylene (hereinafter TC
Write E. ), Dichloroethylene (hereinafter referred to as DCE) and other organohalogen compounds such as organochlorine compounds have contaminated soil and groundwater, and have been taken up as a social problem. Various methods for purifying these organic halogen compounds have been devised. For example, JP-A-7-178
Japanese Patent Publication No. 395 describes a method of aerobic or anaerobic decomposition treatment by microorganisms. Further, for example, Japanese Patent Laid-Open No. 7-1
Japanese Patent No. 44137 describes a method of oxidative decomposition treatment with a photocatalyst. Further, for example, the above-mentioned JP-A-11-
Japanese Patent No. 235577 discloses a method of reductive decomposition treatment using sponge-like special iron powder (hereinafter referred to as special iron powder).
【０００３】さらに加えて、例えば、特開２０００−５
７４０号公報には、金属鉄粉表面に金属銅を０．２〜２
０ｗｔ％付着させた銅含有鉄粉（以下、銅含有鉄粉と記
載する。）を調製し、金属鉄粉の有機ハロゲン化合物へ
の分解活性を高めることが可能になったことが開示され
ている。In addition to this, for example, Japanese Patent Laid-Open No. 2000-5
In Japanese Patent No. 740, the metallic iron powder surface is coated with metallic copper in an amount of 0.2-2.
It is disclosed that it is possible to prepare a copper-containing iron powder (hereinafter referred to as a copper-containing iron powder) having 0 wt% adhered thereto, and to enhance the decomposition activity of the metal iron powder into an organic halogen compound. .
【０００４】[0004]
【発明が解決しようとする課題】有機ハロゲン化合物に
よる土壌および地下水等の汚染を浄化するため、上述の
ような技術が開示、提案されているが、有機ハロゲン化
合物は広範囲な化合物群を含み、例えば、前記ＤＣＥの
ように、従来の技術では分解が困難で浄化に長時間を要
するものもある。このため、例えば土壌浄化の分野で
は、難分解性の有機ハロゲン化合物をより速く浄化でき
る方法が強く望まれている。本発明は、以上のような状
況を背景としてなされたものであり、土壌等の環境を汚
染している難分解性の有機ハロゲン化合物を、高速度で
分解、浄化可能な金属粉を提供することにある。The above-mentioned techniques have been disclosed and proposed in order to purify soil, groundwater and the like caused by organohalogen compounds. However, organohalogen compounds include a wide range of compounds. In some cases, like the DCE, it is difficult to decompose with conventional techniques and it takes a long time for purification. Therefore, for example, in the field of soil remediation, there is a strong demand for a method that can more rapidly purify persistent organic halogen compounds. The present invention has been made against the background of the above circumstances, and provides a metal powder capable of decomposing and purifying a hardly decomposable organic halogen compound contaminating the environment such as soil at a high speed. It is in.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、まず、種
々の金属粉試料を準備し、難分解性の有機ハロゲン化合
物としてＤＣＥを選択して、これら金属粉試料によるＤ
ＣＥの分解速度試験をおこなった。試行錯誤の結果、本
発明者らは、２種以上の金属種、特に、ニッケルと鉄と
を各々主成分とする相を有する金属粉、およびアルミニ
ウムとマンガンとを各々主成分する相を有する金属粉
は、ＤＣＥの分解速度が速いことを見出し、さらに研究
の結果、これらの金属粉が、ＤＣＥを始めとする難分解
性有機ハロゲン化合物を高速度で分解、浄化可能な金属
粉であることに想到した。さらに、アルミニウム製錬工
程やアルミニウム加工製品製造工程におけるアルミニウ
ムの熔練工程で副生するアルミドロスより製造した金属
粉も、難分解性有機ハロゲン化合物を高速度で分解、浄
化可能な金属粉であることにも想到して本発明を完成し
たものである。The inventors of the present invention first prepared various metal powder samples, selected DCE as a hardly decomposable organohalogen compound, and prepared D by these metal powder samples.
A decomposition rate test of CE was performed. As a result of trial and error, the inventors of the present invention have two or more metal species, particularly metal powder having a phase containing nickel and iron as main components, and a metal powder having a phase containing aluminum and manganese as main components. It was found that the powder has a high decomposition rate of DCE, and as a result of further research, these metal powders are metal powders capable of decomposing and purifying persistent organic halogen compounds such as DCE at a high speed. I thought about it. Furthermore, the metal powder produced from aluminum dross, which is a by-product of the aluminum smelting process in the aluminum smelting process and aluminum processed product manufacturing process, is also a metal powder that can decompose and purify persistent organic halogen compounds at high speed. The present invention has been completed with this in mind.
【０００６】すなわち上述の課題を解決する第１の発明
は、金属粉を構成する金属粒子であって、前記各々の金
属粒子は、ニッケルを主成分とする相と、鉄を主成分と
する相とを有することを特徴とする有機ハロゲン化合物
分解用金属粉である。That is, a first invention for solving the above-mentioned problems is a metal particle constituting a metal powder, wherein each of the metal particles comprises a phase containing nickel as a main component and a phase containing iron as a main component. It is a metal powder for decomposing an organic halogen compound, which comprises:
【０００７】この構成を有する金属粉は、ＰＣＥ、ＴＣ
Ｅ、ｃｉｓ−１，２−ＤＣＥ、ｔｒａｎｓ−１，２−Ｄ
ＣＥを始めとする各種の難分解性有機ハロゲン化合物、
例えば、モノクロロベンゼン（以下、ＭＣＢと記載す
る。）、１，２−ジクロロベンゼン（以下、１，２−Ｄ
ＣＢと記載する。）、１，３−ジクロロベンゼン（以
下、１，３−ＤＣＢと記載する。）、ジクロロメタン、
四塩化炭素、１，２−ジクロロエタン（以下、１，２−
ＤＣＡと記載する。）、１，１−ジクロロエタン（以
下、１，１−ＤＣＡと記載する。）、１，１，１−トリ
クロロエタン、１，１，２−トリクロロエタン、１，３
−ジクロロプロペン、トリハロメタン、１，１−ジクロ
ロエチレン、ＰＣＢ等に適用可能であり、なかでも、特
に塩素系有機化合物を高速度で分解浄化することができ
る。この結果、本発明に係る金属粉を用いることによ
り、有機ハロゲン化合物に汚染された土壌、地下水、お
よび地表水の浄化が可能である。Metal powders having this structure are PCE and TC.
E, cis-1,2-DCE, trans-1,2-D
Various persistent halogen compounds such as CE,
For example, monochlorobenzene (hereinafter, referred to as MCB), 1,2-dichlorobenzene (hereinafter, 1,2-D)
It describes as CB. ), 1,3-dichlorobenzene (hereinafter referred to as 1,3-DCB), dichloromethane,
Carbon tetrachloride, 1,2-dichloroethane (hereinafter 1,2-
It is described as DCA. ), 1,1-dichloroethane (hereinafter referred to as 1,1-DCA), 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3
-It is applicable to dichloropropene, trihalomethane, 1,1-dichloroethylene, PCB and the like, and in particular, chlorine-based organic compounds can be decomposed and purified at high speed. As a result, by using the metal powder according to the present invention, it is possible to purify soil, groundwater, and surface water contaminated with organic halogen compounds.
【０００８】第２の発明は、前記鉄を主成分とする相の
表面に、前記ニッケルを主成分とする相が点在して付着
していることを特徴とする第１の発明に記載の有機ハロ
ゲン化合物分解用金属粉である。A second invention is characterized in that the phase containing nickel as a main component is scattered and adhered to the surface of the phase containing iron as a main component. It is a metal powder for decomposing organic halogen compounds.
【０００９】第３の発明は、前記金属粉におけるニッケ
ルの含有率が、０ｗｔ％を含まない２０ｗｔ％以下であ
ることを特徴とする第１または第２の発明に記載の有機
ハロゲン化合物分解用金属粉である。A third invention is the metal for decomposing an organohalogen compound according to the first or second invention, wherein the content of nickel in the metal powder is 20 wt% or less not including 0 wt%. It is powder.
【００１０】第４の発明は、金属粉を構成する金属粒子
であって、前記各々の金属粒子は、マンガンを主成分と
する相と、アルミニウムを主成分とする相とを有するこ
とを特徴とする有機ハロゲン化合物分解用金属粉であ
る。A fourth aspect of the present invention is a metal particle constituting a metal powder, wherein each of the metal particles has a phase containing manganese as a main component and a phase containing aluminum as a main component. It is a metal powder for decomposing an organic halogen compound.
【００１１】第５の発明は、前記アルミニウムを主成分
とする相の表面に、前記マンガンを主成分とする相が点
在して付着していることを特徴とする第４の発明に記載
の有機ハロゲン化合物分解用金属粉である。A fifth aspect of the present invention is characterized in that the phase containing manganese as a main component is scattered and adhered to the surface of the phase containing aluminum as a main component. It is a metal powder for decomposing organic halogen compounds.
【００１２】第６の発明は、前記金属粉におけるマンガ
ンの含有率が、０ｗｔ％を含まない３０ｗｔ％以下であ
ることを特徴とする第４または第５の発明に記載の有機
ハロゲン化合物分解用金属粉である。A sixth invention is the metal for decomposing an organohalogen compound according to the fourth or fifth invention, wherein the content of manganese in the metal powder is 30 wt% or less not including 0 wt%. It is powder.
【００１３】第７の発明は、アルミニウムの熔練工程で
産するアルミドロスより製造される金属粉であって、酸
化アルミニウムを主成分とし、Ｃ、Ｎａ、Ｍｇ、Ａｌ、
Ｓｉ、Ｃａ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｚｎのい
ずれかの少なくとも１種以上の元素を主成分とする相を
含有することを特徴とする有機ハロゲン化合物分解用金
属粉である。A seventh invention is a metal powder produced from aluminum dross produced in the aluminum melting step, which contains aluminum oxide as a main component and contains C, Na, Mg, Al,
A metal powder for decomposing an organohalogen compound, which contains a phase containing at least one element selected from the group consisting of Si, Ca, Mn, Fe, Co, Ni, Cu, and Zn as a main component.
【００１４】この構成を採ることで、アルミドロスとい
うアルミニウムの熔練工程での副産物の有効活用法を見
出し、併せて極めて低コストな有機ハロゲン化合物分解
用金属粉を得ることができた。この結果、本発明に係る
金属粉を用いることにより、有機ハロゲン化合物に汚染
された土壌、地下水、および地表水の浄化が低コストで
可能となる。By adopting this constitution, a method of effectively utilizing aluminum dross, which is a by-product in the aluminum melting step, was found, and at the same time, an extremely low cost metal powder for decomposing organic halogen compounds could be obtained. As a result, the use of the metal powder according to the present invention enables purification of soil, groundwater, and surface water contaminated with organic halogen compounds at low cost.
【００１５】第８の発明は、第１から第７の発明のいず
れかに記載の有機ハロゲン化合物分解用金属粉を用いる
ことを特徴とする、土壌および／または地下水および／
または地表水の浄化方法である。An eighth invention is characterized by using the metal powder for decomposing an organohalogen compound according to any one of the first to seventh inventions, and soil and / or groundwater and / or
Or it is a purification method of surface water.
【００１６】[0016]
【発明の実施の形態】（有機ハロゲン化合物分解用金属
粉の成分および構造）本発明の実施の形態に係る有機ハ
ロゲン化合物分解用金属粉（以下、金属粉と記載す
る。）は、少なくとも、鉄（以下、Ｆｅと記載する。）
−ニッケル（以下、Ｎｉと記載する。）の２種の金属元
素を主成分とする相を有し、Ｆｅを主成分とする相を母
材金属相とし、Ｎｉを主成分とする相を付着金属相と
し、付着金属相は母材金属相に付着してＮｉ付着Ｆｅ粒
子の形態となり、この粒子が集合したものである。BEST MODE FOR CARRYING OUT THE INVENTION (Components and structure of metal powder for decomposing organic halogen compounds) The metal powder for decomposing organic halogen compounds (hereinafter referred to as metal powder) according to the embodiment of the present invention is at least iron. (Hereinafter, described as Fe.)
-Has a phase mainly composed of two kinds of metal elements of nickel (hereinafter referred to as Ni), a phase mainly composed of Fe is a base metal phase, and a phase mainly composed of Ni is attached A metal phase is formed, and the adhered metal phase adheres to the base metal phase to form Ni adhered Fe particles, and these particles are aggregated.
【００１７】次に、本発明の異なる実施の形態に係る金
属粉は、少なくともアルミニウム（以下、Ａｌと記載す
る。）−マンガン（以下、Ｍｎと記載する。）の２種の
金属元素を主成分とする相を有し、Ａｌを主成分とする
相を母材金属相とし、Ｍｎを主成分とする相を付着金属
相とし、付着金属相は母材金属相に付着してＭｎ付着Ａ
ｌ粒子の形態となり、この粒子が集合体したものであ
る。Next, the metal powder according to another embodiment of the present invention contains at least two kinds of metal elements of aluminum (hereinafter referred to as Al) -manganese (hereinafter referred to as Mn) as a main component. And a phase containing Al as a main component is a base metal phase, a phase containing Mn as a main component is an adhering metal phase, and the adhering metal phase is adhered to the base metal phase and Mn adhering A
It is in the form of 1 particle, and is an aggregate of these particles.
【００１８】さらに、本発明の異なる実施の形態に係る
金属粉は、Ａｌ熔錬工程等の副産物であるアルミドロス
より製造した金属粉である。Further, the metal powder according to another embodiment of the present invention is a metal powder produced from aluminum dross which is a by-product of the Al smelting process and the like.
【００１９】まず、Ｎｉ付着Ｆｅ粉およびＭｎ付着Ａｌ
粉について、図１を参照しながら説明する。図１は、本
発明に係る金属粉中の金属粒子を模式的に表現した拡大
図である。図１において、符号１は母材金属相、符号２
は付着金属相であり、この母材金属相１へ付着金属相２
が付着して符号３に示す金属粉粒子の形態となる。この
金属粉粒子３の多数集合したものが金属粉４である。さ
らに符号５は母材金属相１と付着金属相２との界面であ
り、符号ｄは付着金属相２の付着膜厚を示す。Ｎｉ付着
Ｆｅ粉およびＭｎ付着Ａｌ粉とも、母材金属相１である
Ｆｅ相、Ａｌ相の形状は、球状、針状、海綿状等どの様
なものでも良いが、単位重量当たりの比表面積が大きい
ことが好ましい。付着金属相２であるＮｉ相、Ｍｎ相
は、前記母材金属相１の表面において付着金属相２同士
が連続することなく、独立して分散し、点在する形で付
着している形態が好ましい。すなわち、金属粉粒子３を
構成する少なくとも２つの相が金属粉粒子３の表面に露
出していることが好ましい。この構成を有することで金
属粉４は、周囲にある有機ハロゲン化合物を効率的に分
解できると考えられる。しかし、この母材金属相１と付
着金属相２との界面５内に、例えば、母材金属の酸化物
等の化合物形態を有する部分が一部存在したとしても、
有機ハロゲン化合物の分解特性に大きな悪影響を与える
ことはない。First, Ni-deposited Fe powder and Mn-deposited Al
The powder will be described with reference to FIG. FIG. 1 is an enlarged view schematically showing metal particles in a metal powder according to the present invention. In FIG. 1, reference numeral 1 is a base metal phase, reference numeral 2
Is the adherent metal phase, and the adherent metal phase 2 to the base metal phase 1
Adhere to form the form of metal powder particles indicated by reference numeral 3. A large number of the metal powder particles 3 are aggregated to form the metal powder 4. Further, reference numeral 5 is an interface between the base metal phase 1 and the adhered metal phase 2, and reference numeral d is the adhered film thickness of the adhered metal phase 2. Both the Ni-adhered Fe powder and the Mn-adhered Al powder may have any shape such as a spherical shape, a needle shape, and a sponge shape of the Fe phase and the Al phase, which are the base metal phase 1, but have a specific surface area per unit weight. It is preferably large. The Ni phase and the Mn phase, which are the adhered metal phases 2, have a form in which the adhered metal phases 2 are independently dispersed on the surface of the base metal phase 1 without being continuous with each other and adhered in a scattered manner. preferable. That is, it is preferable that at least two phases forming the metal powder particles 3 are exposed on the surface of the metal powder particles 3. It is considered that the metal powder 4 having this configuration can efficiently decompose the surrounding organic halogen compound. However, even if a portion having a compound form such as an oxide of the base metal exists in the interface 5 between the base metal phase 1 and the adhered metal phase 2,
It does not significantly affect the decomposition characteristics of the organic halogen compound.
【００２０】付着金属相２の付着膜厚ｄには、特に制限
はないが、付着金属としてＮｉ、Ｍｎのような金属を用
いる場合はコストの観点より、できる限り薄くすること
が好ましい。The thickness d of the deposited metal phase 2 is not particularly limited, but when a metal such as Ni or Mn is used as the deposited metal, it is preferably as thin as possible from the viewpoint of cost.
【００２１】Ｎｉ付着Ｆｅ粉およびＭｎ付着Ａｌ粉と
も、金属粉粒子３の粒径は、１〜５００μｍが好まし
い。何となれば、粒径が１μｍ以下の場合、土壌への分
散性は優れるが、例えば地下水流などとともに、土壌粒
子間隙を通過してより下層の方へ流失してしまう可能性
があるからであり、一方、５００μｍを超える場合は、
土壌中での位置は安定するものの、単位土壌面積当たり
の金属粉４の使用量が増えるので、コストの点を考える
と５００μｍ以下の粒径が好ましいからである。但し、
例えば母材金属相１として海綿状粒子のような比表面積
の大きな金属相を用いる場合はこの限りではではない。
比表面積の大きな金属相の場合、金属相の単位重量あた
りの有効反応サイトが増えるので、単位土壌面積当たり
の使用量を低減することができ、金属粒子３の粒径が５
００μｍを超える金属粉４であっても好ましく使用でき
る。In both the Ni-adhered Fe powder and the Mn-adhered Al powder, the metal powder particles 3 preferably have a particle size of 1 to 500 μm. This is because when the particle size is 1 μm or less, the dispersibility in the soil is excellent, but there is a possibility that the particles may pass through the soil particle gap and be washed away toward the lower layer, for example, along with the groundwater flow. On the other hand, when it exceeds 500 μm,
This is because the position in the soil is stable, but the amount of the metal powder 4 used per unit soil area increases, so that a particle size of 500 μm or less is preferable in terms of cost. However,
For example, this is not the case when a metal phase having a large specific surface area such as sponge-like particles is used as the base metal phase 1.
In the case of a metal phase having a large specific surface area, the number of effective reaction sites per unit weight of the metal phase increases, so that the amount used per unit soil area can be reduced, and the particle size of the metal particles 3 is 5
Even the metal powder 4 having a diameter of more than 00 μm can be preferably used.
【００２２】Ｎｉ付着Ｆｅ粉において、Ｎｉ相中のＮｉ
元素とＦｅ相中のＦｅ元素との重量の和を１００ｗｔ％
としたとき、Ｆｅ相へのＮｉ相付着量が０ｗｔ％では有
機ハロゲン化合物の分解速度が遅く、１０ｗｔ％以上に
なると有機ハロゲン化合物の分解速度が飽和してしま
う。ここでＮｉは原料コストの高い金属であることよ
り、有機ハロゲン化合物の分解速度と原料コストとを考
慮すると、Ｎｉ付着Ｆｅ粉におけるＮｉ付着量は、０ｗ
ｔ％を含まない２０ｗｔ％以下が好ましく、さらに好ま
しくは０ｗｔ％を含まない５ｗｔ％以下である。In the Ni-adhered Fe powder, Ni in the Ni phase
The sum of the weight of the element and the Fe element in the Fe phase is 100 wt%
When the amount of Ni phase adhered to the Fe phase is 0 wt%, the decomposition rate of the organohalogen compound is slow, and when it is 10 wt% or more, the decomposition rate of the organohalogen compound is saturated. Here, since Ni is a metal having a high raw material cost, the Ni deposition amount in the Ni-deposited Fe powder is 0 w, considering the decomposition rate of the organic halogen compound and the raw material cost.
It is preferably 20 wt% or less without t%, and more preferably 5 wt% or less without 0 wt%.
【００２３】次に、Ｍｎ付着Ａｌ粉において、Ｍｎ相中
のＭｎ元素とＡｌ相中のＡｌ元素との重量の和を１００
ｗｔ％としたとき、ＡｌへのＭｎ付着量が、０ｗｔ％で
は有機ハロゲン化合物の分解速度が遅く、３０ｗｔ％以
上になると有機ハロゲン化合物の分解速度が飽和してし
まう。ここでＭｎは原料コストの高い金属であることよ
り、有機ハロゲン化合物の分解速度と原料コストとを考
慮すると、Ｍｎ付着Ａｌ粉におけるＭｎ付着量は、０ｗ
ｔ％を含まない３０ｗｔ％以下が好ましい。Next, in the Mn-adhered Al powder, the sum of the weights of the Mn element in the Mn phase and the Al element in the Al phase is 100.
When the amount of Mn attached to Al is 0 wt%, the decomposition rate of the organohalogen compound is slow, and when it is 30 wt% or more, the decomposition rate of the organohalogen compound is saturated. Since Mn is a metal having a high raw material cost, the Mn deposition amount in the Mn-deposited Al powder is 0 w, considering the decomposition rate of the organic halogen compound and the raw material cost.
30 wt% or less not including t% is preferable.
【００２４】ここで上述した金属粉４を、汚染土壌等へ
施工するコストの観点より、Ｎｉ付着Ｆｅ粉およびＭｎ
付着Ａｌ粉とも、金属粒子３の粒径は、１〜５００μｍ
が好ましく、さらには１０〜１００μｍ程度が好まし
い。何となれば、粒径が１μｍ以下の場合、土壌への分
散性は優れるが、例えば地下水流などとともに、土壌粒
子間隙を通過してより下層の方へ流失してしまう可能性
があるあるからであり、一方、５００μｍを超える場合
は、土壌中での位置は安定するものの、単位土壌面積当
たりの金属粉４の使用量が増えるので、施工のコストを
考えると金属粒子３の粒径が５００μｍ以下の粒径が好
ましいからであり、金属粒子３の粒径が１０〜１００μ
ｍ程度の金属粉４はさらに好ましいからである。但し、
例えば海綿状粒子のような比表面積の大きな母材金属相
１を用いる場合はこの限りではではない。比表面積の大
きな母材金属相１の場合、母材金属相１の単位重量あた
りの有効反応サイトが増えるので、単位土壌面積当たり
の使用量を低減することができ、金属粒子３の粒径が５
００μｍを超える金属粉４であっても好ましく使用でき
る。From the viewpoint of the cost of constructing the above-mentioned metal powder 4 on contaminated soil or the like, Ni-adhered Fe powder and Mn are added.
With the adhered Al powder, the particle size of the metal particles 3 is 1 to 500 μm.
Is preferable, and about 10 to 100 μm is more preferable. If the particle size is 1 μm or less, the dispersibility in the soil is excellent, but there is a possibility that the particles may pass through the soil particle gap and be lost to the lower layer, for example, along with the groundwater flow. On the other hand, when it exceeds 500 μm, although the position in the soil is stable, the amount of the metal powder 4 used per unit soil area increases, so considering the construction cost, the particle size of the metal particles 3 is 500 μm or less. Is preferable, and the particle size of the metal particles 3 is 10 to 100 μm.
This is because the metal powder 4 of about m is more preferable. However,
This is not the case when the base metal phase 1 having a large specific surface area such as spongy particles is used. In the case of the base metal phase 1 having a large specific surface area, the number of effective reaction sites per unit weight of the base metal phase 1 increases, so that the amount used per unit soil area can be reduced, and the particle size of the metal particles 3 can be reduced. 5
Even the metal powder 4 having a diameter of more than 00 μm can be preferably used.
【００２５】次に、アルミドロスより製造した金属粉に
ついて説明する。まず、アルミドロスとは、Ａｌの製錬
工程やアルミ加工製品製造工程におけるＡｌ鉱石やＡｌ
化合物を含有する廃棄物の熔練工程の際、Ａｌ溶湯面上
に生成する不純物を含む副産物である。アルミドロス
は、Ａｌを数十ｗｔ%含むため、従来は、不純物含有量
の低い下層部を分離して採取した後、再度のＡｌ製錬工
程を行ってＡｌ分を回収した後、残余の部分は廃棄物と
して処分される状況であった。この再度のＡｌ製錬工程
には高温熱処理工程が含まれるため、大きなエネルギー
を必要とするうえに、残余部分の廃棄物中には、まだ約
５〜１０ｗｔ%のＡｌと約１０〜５０ｗｔ%のアルミナ成
分が含有されており、Ａｌ分の回収、再利用という意味
でも効率の悪いものであった。Next, the metal powder produced from aluminum dross will be described. First, aluminum dross means Al ore and Al in the Al smelting process and aluminum product manufacturing process.
It is a by-product containing impurities that is generated on the surface of the molten Al during the step of melting the waste containing the compound. Since Almidros contains several tens wt% of Al, conventionally, after the lower layer portion having a low impurity content is separated and collected, the Al smelting step is performed again to recover the Al content, and then the remaining portion. Was disposed of as waste. Since the high temperature heat treatment step is included in this second Al smelting step, a large amount of energy is required and, in addition, about 5 to 10 wt% of Al and about 10 to 50 wt% of Al are still contained in the remaining waste. Since it contained an alumina component, it was also inefficient in terms of recovery and reuse of Al content.
【００２６】このアルミドロスは、母材金属相を形成す
る酸化Ａｌ相中にＣ、Ｎａ、Ｍｇ、Ａｌ、Ｓｉ、Ｃａ、
Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｚｎ等のいずれかの少
なくとも1種以上の元素が、合金および／または付着金
属相の形で、混入および／または付着している。前記付
着金属相は、概ね、前記酸化Ａｌ相上において付着金属
相同士が連続することなく、独立して分散し、点在する
形態となっている。This aluminum dross contains C, Na, Mg, Al, Si, Ca in the oxidized Al phase forming the base metal phase.
At least one element selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn is mixed and / or adhered in the form of an alloy and / or an adhering metal phase. The adhering metal phase is generally in a form in which the adhering metal phases are independently dispersed and scattered on the Al oxide phase without being continuous with each other.
【００２７】そして、上記Ａｌの熔錬工程において回収
されるアルミドロスであって、Ａｌ含有量が概ね０．０
１〜７０ｗｔ%であり、 粒子径は０．１〜３００ｍｍ
の範囲であり、比表面積が０．２〜１２０ｍ2／ｇの範
囲にあるものは、有機ハロゲン化合物の分解速度が速
く、有機ハロゲン化合物分解用金属粉として好個に用い
ることができる。このアルミドロスより製造した金属粉
も、上述したＭｎ付着Ａｌ粉と類似の機構により難分解
性の有機ハロゲン化合物を高速度で分解、浄化している
ものと考えられる。The aluminum dross recovered in the Al smelting step has an Al content of about 0.0.
1 to 70 wt%, particle size is 0.1 to 300 mm
And the specific surface area is in the range of 0.2 to 120 m 2 / g, the decomposition rate of the organic halogen compound is high, and it can be favorably used as the metal powder for decomposing the organic halogen compound. It is considered that the metal powder produced from this aluminum dross also decomposes and purifies the hardly-decomposable organic halogen compound at a high speed by a mechanism similar to that of the above-mentioned Mn-adhered Al powder.
【００２８】もちろん、前記アルミドロスを粉砕して、
粒子径を０．１〜８０μｍの範囲に調製したものを金属
粉とするのも好ましい構成である。上記の構成を採るこ
とで、金属粉の土壌等への添加作業が容易にり、さらに
土壌に添加後は、難分解性の有機ハロゲン化合物を高速
度で分解、浄化することが可能となる。Of course, by crushing the aluminum dross,
It is also a preferable configuration that the metal powder has a particle size adjusted to a range of 0.1 to 80 μm. By adopting the above configuration, the work of adding the metal powder to the soil or the like becomes easy, and after addition to the soil, it becomes possible to decompose and purify the hardly-decomposable organic halogen compound at a high speed.
【００２９】この結果、アルミドロスの再処理工程とい
う大きなエネルギーを必要とし、かつ効率の悪いＡｌ分
の回収、再利用工程に替えて、安価な製造コストで金属
粉を製造するという工業的メリットの大きな金属粉製造
工程、およびアルミドロスの有益な使用用途を実現でき
る。As a result, the industrial advantage of producing metal powder at a low production cost instead of the aluminum dross reprocessing step, which requires a large amount of energy, and which is a less efficient Al content recovery and reuse step. It is possible to realize a large metal powder manufacturing process and a beneficial application of aluminum dross.
【００３０】（有機ハロゲン化合物分解用金属粉による
有機ハロゲン化合物分解特性）Ｎｉ付着Ｆｅ粉、Ｍｎ付
着Ａｌ粉、アルミドロスより製造した金属粉とも、ＰＣ
Ｅ、ＴＣＥ、ｃｉｓ−１，２−ＤＣＥ、ｔｒａｎｓ−
１，２−ＤＣＥはもとより、ＭＣＢを始めとする各種の
難分解性有機ハロゲン化合物、例えば、１，２−ＤＣ
Ｂ、１，３−ＤＣＢ、ジクロロメタン、四塩化炭素、
１，２−ＤＣＡ、１，１−ＤＣＡ、１，１，１−トリク
ロロエタン、１，１，２−トリクロロエタン、１，３−
ジクロロプロペン、トリハロメタン、１，1−ＤＣＥ、
ＰＣＢ等の分解に適用可能であり、なかでも、特に塩素
系有機化合物の分解に適している。さらに、上述した金
属粉により、重金属と有機ハロゲン化合物とに混合汚染
された土壌、地下水、および地表水の浄化も可能であ
る。特にＡｌを含有する金属粉を用いた場合、施工環境
が、弱酸性、中性および弱アルカリ性のいずれ場合でも
有機ハロゲン化合物の分解作用を発揮する点で優れてい
る。(Organic Halogen Compound Decomposition Characteristics by Metallic Powder for Decomposing Organic Halogen Compounds) Ni-adhered Fe powder, Mn-adhered Al powder, and metal powder manufactured from aluminum dross are both PC
E, TCE, cis-1,2-DCE, trans-
In addition to 1,2-DCE, various persistent halogenated organic compounds such as MCB, for example, 1,2-DCE
B, 1,3-DCB, dichloromethane, carbon tetrachloride,
1,2-DCA, 1,1-DCA, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,3-
Dichloropropene, trihalomethane, 1,1-DCE,
It is applicable to decomposition of PCB and the like, and is particularly suitable for decomposition of chlorine-based organic compounds. Furthermore, the above-mentioned metal powder can also purify soil, groundwater, and surface water mixed and contaminated with heavy metals and organic halogen compounds. In particular, when a metal powder containing Al is used, it is excellent in that it exhibits a decomposition action of the organic halogen compound regardless of whether the construction environment is weakly acidic, neutral or weakly alkaline.
【００３１】上述のような方法で調製した金属粉の粒子
表面に、難分解性有機ハロゲン化合物が接触する際、そ
の難分解性有機ハロゲン化合物が揮発性であればガス吸
着という形態で、不揮発性であれば流動または混合に伴
う接触という形態で接触すると考えられる。この金属粉
の粒子表面に、ガス吸着または接触した難分解性有機ハ
ロゲン化合物は、金属粉の組成・表面状態等と、有機ハ
ロゲン化合物の構成元素・立体構造との相互作用により
分解される。この相互作用とは、金属粉が有機ハロゲン
化合物中のハロゲン元素に与える直接作用や、二重結合
部への作用や、各種の錯体的な構造を形成する作用等で
あるものと考えられる。When the hard-to-decompose organic halogen compound is brought into contact with the surface of the metal powder particles prepared by the above-mentioned method, if the hard-to-decompose organic halogen compound is volatile, it is adsorbed in the form of gas, which is non-volatile. If so, it is considered that they come into contact with each other in the form of contact with flowing or mixing. The hardly-decomposable organohalogen compound which is adsorbed or brought into contact with the particle surface of the metal powder is decomposed by the interaction between the composition and surface state of the metal powder and the constituent elements and three-dimensional structure of the organohalogen compound. It is considered that the interaction is a direct action of the metal powder on the halogen element in the organic halogen compound, an action on the double bond portion, an action of forming various complex-like structures, and the like.
【００３２】（有機ハロゲン化合物分解用金属粉の施行
方法）上述した金属粉を用いて、各種の有機ハロゲン化
合物で汚染された土壌、地下水、ガス等の浄化処理を行
う場合、例えば次のような方法が好ましい。まず、土壌
の浄化処理をおこなう場合には、掘削された土壌へ土壌
改良機やバックホー等の重機を用いて金属粉を混合する
方法がある。次には振動ミル、回転ミル等の設備に掘削
された土壌と、金属粉と、粉砕メディアとを投入し攪拌
混合処理を行う方法がある。さらには、汚染された土壌
へ、有機ハロゲン化合物分解用金属粉を局所的に混合し
た箇所を適宜、配置し、揮発性の有機ハロゲン化合物を
拡散移動させながら分解処理していく方法等が適用でき
る。(Method of Enforcing Metallic Powder for Decomposing Organic Halogen Compound) When the above-mentioned metal powder is used to purify soil, groundwater, gas, etc. contaminated with various organic halogenated compounds, for example, The method is preferred. First, in the case of performing soil purification treatment, there is a method of mixing metal powder into excavated soil by using a heavy machine such as a soil conditioner or a backhoe. Next, there is a method in which soil excavated in equipment such as a vibration mill and a rotary mill, metal powder, and pulverizing media are charged and a stirring and mixing process is performed. Furthermore, a method of decomposing the volatile organic halogen compound while diffusing and moving it can be applied to the contaminated soil by appropriately arranging a location where the metal powder for decomposing the organic halogen compound is locally mixed. .
【００３３】また、地下水の浄化処理をおこなう場合に
は、地中において、地下水が透過するような金属粉を含
む反応壁を造成するのが好ましい。このとき地中に造成
される反応壁は、地下水が金属粉へ接するように配置す
るが、そのためには汚染土壌深部の地下水の易透過層を
カバーするように、そして易透過層下方に位置する難透
過層にまで反応壁下端部を配置させるか、または埋設さ
れるように反応壁を設けることが好ましい。さらに反応
壁の透水係数が回りの土質と比較して、同レベルである
か、またはそれより高くなるように反応壁の透水性を良
好な状態に調節することが好ましい。そこで例えば、高
砂質土壌等に金属粉を０．１〜５０ｗｔ％程度の範囲で
均一または不均一に分散させた材料で反応壁を造成する
のが好ましい。In the case of purifying groundwater, it is preferable to construct a reaction wall containing metal powder in the ground so that groundwater can permeate. At this time, the reaction wall formed in the ground is arranged so that groundwater is in contact with the metal powder, and for that purpose, it is located so as to cover the easily permeable layer of groundwater deep in the contaminated soil and below the easily permeable layer. It is preferable to dispose the lower end of the reaction wall up to the impermeable layer or to provide the reaction wall so as to be buried. Further, it is preferable to adjust the water permeability of the reaction wall to a good state so that the water permeability of the reaction wall is at the same level as or higher than that of the surrounding soil. Therefore, for example, it is preferable to construct the reaction wall with a material in which metal powder is uniformly or non-uniformly dispersed in a range of about 0.1 to 50 wt% in high sandy soil or the like.
【００３４】（有機ハロゲン化合物分解用金属粉の製造
方法）Ｎｉ付着Ｆｅ粉およびＭｎ付着Ａｌ粉とも、化学
的製造方法と物理的製造方法とにより製造することがで
きる。化学的製造方法とは、付着金属を酸等で溶解した
溶液中へ母材金属粉を浸せきし、両金属のイオン化傾向
の差を利用して母材金属相へ付着金属相を付着させる方
法である。このとき、付着金属の溶解液濃度および浸せ
き時間等を制御することで、付着金属相の母材金属相へ
の付着状態、付着膜厚等を制御することができる。この
方法は、均一な特性を有する金属粉を容易に調製できる
点で好ましい方法である。(Manufacturing Method of Metallic Powder for Decomposing Organic Halogen Compound) Both Ni-adhered Fe powder and Mn-adhered Al powder can be manufactured by a chemical manufacturing method and a physical manufacturing method. The chemical manufacturing method is a method in which the base metal powder is immersed in a solution in which the adhered metal is dissolved with an acid, etc., and the adhered metal phase is attached to the base metal phase by utilizing the difference in the ionization tendency of both metals. is there. At this time, it is possible to control the adhesion state of the adhesion metal phase to the base metal phase, the adhesion film thickness, etc. by controlling the concentration of the solution of the adhesion metal and the immersion time. This method is a preferable method because a metal powder having uniform properties can be easily prepared.
【００３５】物理的製造方法とは、予め粒状化した母材
金属相を含む粒子と、付着金属相を含む粒子とをミキサ
ー等で混合し、その混合時に生じる粒子同士の接触に伴
う衝突圧力を利用して付着金属相を母材金属相へ付着さ
せる方法である。この方法で調製した金属粉を電子顕微
鏡で観察した結果、母材金属相と付着金属相との界面に
両者の合金層が存在せず、界面を境に互いの金属相が直
接接合されていることが判明した。さらに付着金属相
は、圧力を受けたように変形していることが観察された
ことより、母材金属相に圧着しているものと考えられ
る。この方法によれば、酸による溶解の容易性やイオン
化傾向の差違を考慮する必要がない。そこで、母材金属
相と付着金属相として、広い範囲での金属の組み合わせ
を考慮する際に好ましい方法である。ここで、付着金属
相が、ＮｉまたはＭｎという高コストな金属等を含む場
合は、母材金属相を含む粒子と付着金属相を含む粒子と
の混合割合において、母材金属相を含む粒子の比率を高
くする構成としてもよい。この構成を採ると、金属粉の
殆どを母材金属相を含む粒子が占め、高コストの付着金
属相を含む粒子は、母材金属相を含む粒子の表面に点在
して付着している構造をとることになり、金属粉の製造
コストを低減する観点より好ましい。The physical production method is to mix particles containing a pre-granulated base metal phase and particles containing an adhering metal phase with a mixer or the like, and to determine the collision pressure caused by the contact between the particles generated during the mixing. It is a method of utilizing the adhered metal phase to adhere to the base metal phase. As a result of observing the metal powder prepared by this method with an electron microscope, the alloy layers of the base metal phase and the adhered metal phase do not exist at the interface, and the metal phases are directly bonded at the interface. It has been found. Further, since it was observed that the adhered metal phase was deformed as if it was subjected to pressure, it is considered that the adhered metal phase is pressure-bonded to the base metal phase. According to this method, it is not necessary to consider the ease of dissolution with an acid and the difference in ionization tendency. Therefore, it is a preferable method when considering a combination of metals in a wide range as the base metal phase and the adhering metal phase. Here, when the adhered metal phase contains a high-cost metal such as Ni or Mn, in the mixing ratio of the particles containing the base metal phase and the particles containing the adhered metal phase, the particles containing the base metal phase are mixed. It may be configured to increase the ratio. With this configuration, most of the metal powder is occupied by the particles containing the base metal phase, and the high-cost particles containing the adhered metal phase are scattered and adhered to the surface of the particles containing the base metal phase. This is preferable from the viewpoint of having a structure and reducing the manufacturing cost of the metal powder.
【００３６】アルミドロスより製造した金属粉は、上述
したように、Ａｌの熔錬工程よりアルミドロスを回収
し、必要に応じてこれを適宜に粉砕することで得ること
ができる。さらに、このアルミドロスの粉砕粉へ、Ｃ、
Ｎａ、Ｍｇ、Ａｌ、Ｓｉ、Ｃａ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎ
ｉ、Ｃｕ、Ｚｎ等のいずれかの少なくとも1種以上の元
素を、付着金属相の形で添加する構成としてもよい。こ
の構成を採ると、アルミドロスより製造した金属粉が、
有機ハロゲン化合物を分解する速度をさらに速めること
が可能となり好ましい。ここで、アルミドロスの粉砕粉
へ付着金属相を添加する方法として、上述したＮｉ付着
Ｆｅ粉等を製造する際に用いた物理的製造方法等が好個
に適用できる。The metal powder produced from aluminum dross can be obtained by recovering aluminum dross from the Al smelting step and appropriately crushing it as necessary, as described above. Furthermore, to this crushed powder of aluminum dross, C,
Na, Mg, Al, Si, Ca, Mn, Fe, Co, N
At least one element selected from i, Cu, Zn and the like may be added in the form of an adhered metal phase. With this configuration, the metal powder produced from aluminum dross is
It is preferable because the rate of decomposing the organic halogen compound can be further increased. Here, as the method for adding the adhered metal phase to the pulverized powder of aluminum dross, the physical production method used when producing the Ni-adhered Fe powder or the like described above can be suitably applied.
【００３７】以下、実施例に基づいて本発明をさらに詳
細に説明する。
（実施例１）
（金属粉試料の調製）母材金属相の主成分をＦｅ、付着
金属相の主成分をＮｉとして、Ｎｉ被着Ｆｅ粉試料を、
物理的方法の乾式共粉砕（メカノケミカル）法を用いて
次のように調製した。The present invention will be described in more detail based on the following examples. (Example 1) (Preparation of metal powder sample) With the main component of the base metal phase being Fe and the main component of the adhering metal phase being Ni, a Ni-adhered Fe powder sample was prepared.
It was prepared as follows using a physical dry co-milling (mechanochemical) method.
【００３８】まず、平均粒径５０μｍのＦｅ粉、もう１
つの金属として平均粒径０．３μｍのＮｉ粉を準備し
た。この、Ｆｅ粉を９５ｗｔ％、Ｎｉ粉を５ｗｔ％とな
るように配合し混合の後、５００ｇを秤量し容量２Ｌの
粉砕ポットに投入する。粉砕ポットにはさらに粉砕メデ
ィアとして２０ｍｍ径のＺｒＯ2ボールを５ｋｇ投入
し、回転ミルに設置した。そしてミルの回転数を１００
ｒｐｍとし５分間粉砕処理をおこなって、Ｎｉ付着Ｆｅ
粉試料を調製した。First, Fe powder having an average particle size of 50 μm and another 1
Ni powder having an average particle diameter of 0.3 μm was prepared as one metal. The Fe powder is mixed at 95 wt% and the Ni powder is mixed at 5 wt%, and after mixing, 500 g is weighed and put into a crushing pot having a capacity of 2 L. Further, 5 kg of ZrO 2 balls having a diameter of 20 mm was put into the crushing pot as a crushing medium and set in a rotary mill. And the rotation speed of the mill is 100
After crushing for 5 minutes at rpm, Ni-adhered Fe
A flour sample was prepared.
【００３９】（調製試料の観察）前記調製された試料を
電子顕微鏡で観察したところ、Ｆｅ金属相の表面にＮｉ
金属が直接接合された形態にて点在しており、境となる
界面に合金相が存在していないことが判明した。(Observation of Prepared Sample) When the prepared sample was observed with an electron microscope, Ni was observed on the surface of the Fe metal phase.
It was found that the metals were scattered in the form of being directly joined, and no alloy phase was present at the boundary interface.
【００４０】（調製試料による有機ハロゲン化合物の分
解試験）次に、前記調製されたＮｉ付着Ｆｅ粉を用い
て、有機ハロゲン化合物の分解試験を実施した。まずイ
オン交換水に、有機ハロゲン化合物として、ｃｉｓ−
１，２−ＤＣＥを２５．６ｍｇ／Ｌの濃度で含有させた
試験用汚染物質溶液を調製した。１００ｍｌのバイアル
瓶へＮｉ付着Ｆｅ粉試料を０．５ｇ投入し、そこへ前記
試験用汚染物質溶液を５０ｍｌ注ぎ、密封後、攪拌震盪
し、一定時間毎にバイアル瓶のヘッドスペース部のガス
をサンプリングして、このガスをＧＣ−ＭＳ（ガスクロ
マト−質量分析装置）装置にて定性・定量分析し、ヘッ
ドスペース部ガス中の有機塩素化合物濃度と前記攪拌震
盪処理時間とより、試験用汚染物質の分解の半減期を測
定した。(Decomposition test of organohalogen compound by prepared sample) Next, a decomposition test of the organohalogen compound was carried out using the Ni-deposited Fe powder prepared above. First, cis- as an organic halogen compound was added to ion-exchanged water.
A test contaminant solution was prepared containing 1,2-DCE at a concentration of 25.6 mg / L. Into a 100 ml vial bottle, 0.5 g of the Ni-adhered Fe powder sample was poured, and 50 ml of the test contaminant solution was poured into the vial bottle. Then, this gas is qualitatively and quantitatively analyzed by a GC-MS (gas chromatograph-mass spectrometer) device, and the concentration of the organic chlorine compound in the headspace gas and the stirring and shaking treatment time are used to determine the contaminant for the test. The half-life of degradation was measured.
【００４１】この測定結果より、Ｎｉ付着Ｆｅ粉試料に
よるｃｉｓ−１，２−ＤＣＥの分解の半減期は１．１日
であることが判明した。From these measurement results, it was found that the half-life of decomposition of cis-1,2-DCE by the Ni-adhered Fe powder sample was 1.1 days.
【００４２】（実施例２）実施例１において、有機ハロ
ゲン化合物を１，２−ＤＣＡとし、含有量を２５ｍｇと
した以外は同様に行ったこの測定結果より、Ｎｉ付着Ｆ
ｅ粉試料による１，２−ＤＣＡの分解の半減期は３．１
日であることが判明した。(Example 2) From the results of this measurement performed in the same manner as in Example 1 except that the organic halogen compound was 1,2-DCA and the content was 25 mg, the Ni-adhered F
The half-life of decomposition of 1,2-DCA by e powder sample is 3.1.
Turned out to be a day.
【００４３】（実施例３）実施例１において、１つの金
属粒子として平均粒径５０μｍのＡｌ粉、もう１つの金
属として平均粒径３０μｍのＭｎ粉とし、配合比は、Ａ
ｌ粉を８０ｗｔ％、Ｍｎ粉を２０ｗｔ％となるようにし
た以外は実施例１と同様にｃｉｓ−１，２−ＤＣＥの分
解試験を行った。その結果、Ｍｎ付着Ａｌ粉試料による
ｃｉｓ−１，２−ＤＣＥの分解の半減期は１．９日であ
ることが判明した。Example 3 In Example 1, one metal particle was Al powder having an average particle size of 50 μm, another metal was Mn powder having an average particle size of 30 μm, and the compounding ratio was A.
The decomposition test of cis-1,2-DCE was performed in the same manner as in Example 1 except that the amount of 1 powder was 80 wt% and the amount of Mn powder was 20 wt%. As a result, it was found that the half-life of the decomposition of cis-1,2-DCE by the Mn-adhered Al powder sample was 1.9 days.
【００４４】（比較例１）硫酸銅の１Ｍ水溶液を３００
ｍＬ調製し、平均粒径５０μｍのＦｅ粉を２０ｗｔ％投
入しスラリーとし５分間攪拌し、この銅含有鉄粉試料を
用いて、実施例１と同様にｃｉｓ−１，２−ＤＣＥの分
解試験を行った。この試験結果より、銅含有Ｆｅ粉試料
によるｃｉｓ−１，２−ＤＣＥの分解の半減期は３．２
日であることが判明した。Comparative Example 1 A 1M aqueous solution of copper sulfate was added to 300 parts.
mL was prepared, 20 wt% of Fe powder having an average particle diameter of 50 μm was added, the mixture was made into a slurry and stirred for 5 minutes, and a decomposition test of cis-1,2-DCE was performed using this copper-containing iron powder sample in the same manner as in Example 1. went. From this test result, the half-life of the decomposition of cis-1,2-DCE by the copper-containing Fe powder sample was 3.2.
Turned out to be a day.
【００４５】（実施例４）Ａｌ系廃材の製錬工程におい
て、その溶湯液面上に分離されたアルミドロスを回収、
冷却後、粉砕処理を行い平均粒径１〜５０μｍの金属粉
を得た。このアルミドロスより製造された金属粉に、Ｘ
線回折による定性分析を行った結果、この金属粉には、
酸化アルミニウムを主成分とする母材金属相に、Ａｌを
始めとして、Ｃ、Ｎａ、Ｍｇ、Ａｌ、Ｓｉ、Ｃａ、Ｍ
ｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｚｎが含まれていた。(Example 4) In the smelting process of Al-based waste material, the aluminum dross separated on the liquid surface of the molten metal is recovered,
After cooling, pulverization treatment was performed to obtain metal powder having an average particle size of 1 to 50 μm. X is added to the metal powder manufactured from this aluminum dross.
As a result of qualitative analysis by line diffraction, this metal powder
In addition to Al, C, Na, Mg, Al, Si, Ca, M is added to the base metal phase mainly composed of aluminum oxide.
It contained n, Fe, Co, Ni, Cu and Zn.
【００４６】このアルミドロスより製造された金属粉を
用いて、ＴＣＥに対する分解試験を以下のように行っ
た。容量１２４ｍｌのバイアル瓶中に、イオン交換水５
０ｍｌ、ＴＣＥ１μｌ、およびアルミドロスの粉砕粉
０．５ｇを投入し、シリコンライナー付きブチルゴムセ
プタムとアルミシールにより密封した。この密封時点か
らバイアル瓶内のＴＣＥ濃度を経時的に分析評価し、Ｔ
ＣＥ濃度の半減期を求めたところ、４．２日であること
が判明した。Using the metal powder produced from this aluminum dross, the decomposition test for TCE was conducted as follows. Ion-exchanged water 5
0 ml, 1 μl of TCE, and 0.5 g of crushed aluminum dross powder were added, and the mixture was sealed with a butyl rubber septum with a silicon liner and an aluminum seal. From this sealing point, the TCE concentration in the vial was analyzed and evaluated over time,
When the half-life of the CE concentration was determined, it was found to be 4.2 days.
【００４７】（分解反応速度定数の算出）本発明のアル
ミドロスより製造した金属粉によるＴＣＥ分解の反応速
度は、バイアル瓶内のＴＣＥの初期濃度をＣ0（例：ｍ
ｇ／ｋｇ）、経過時間をｔ（ｄａｙ）、ｔ（ｄａｙ-1）
後におけるバイアル瓶内のＴＣＥの濃度をＣ（例：ｍｇ
／ｋｇ）とすると、以下の式１に示す擬一次反応式に従
うことが明らかとなった。
ｌｎ（Ｃ／Ｃ0）＝−ｋ・ｔ ……（式１）
ここで、ｋ（ｄａｙ-1）を分解反応速度定数と呼び、本
発明のアルミドロスより製造した金属粉による、ＴＣＥ
分解の分解性能を表す指標として用いることができる。(Calculation of Decomposition Reaction Rate Constant) The reaction rate of TCE decomposition by the metal powder produced from the aluminum dross of the present invention is the initial concentration of TCE in the vial C 0 (example: m
g / kg), the elapsed time is t (day), t (day -1 )
After that, the concentration of TCE in the vial was changed to C (example: mg
/ Kg), it was clarified that the quasi-first-order reaction formula shown in Formula 1 below was followed. ln (C / C 0 ) = − k · t (Equation 1) Here, k (day −1 ) is called a decomposition reaction rate constant, and TCE by the metal powder produced from the aluminum dross of the present invention is used.
It can be used as an index showing the decomposition performance of decomposition.
【００４８】（実施例５）シルト質土壌５０ｇへＴＣＥ
を１μｌの割合で混合し、ＴＣＥ濃度２９．４ｍｇ／ｋ
ｇの模擬汚染土壌を調製した。この模擬汚染土壌に対し
て、実施例４に記載のアルミドロスより製造した金属粉
を１．０ｗｔ%添加し、攪拌羽根付き粉体混合装置にて
１分間混合処理を行い、２０日間密閉容器内で静置した
後に土壌中のＴＣＥ含有量を測定した。この結果、処理
後のＴＣＥ濃度７．２ｍｇ／ｋｇとなり、初期濃度２
９．４ｍｇ／ｋｇから大きく減少した。分解反応速度定
数は０．０７ｄａｙ-1であった。(Example 5) TCE to 50 g of silty soil
Were mixed at a ratio of 1 μl, and the TCE concentration was 29.4 mg / k.
g of simulated contaminated soil was prepared. To this simulated contaminated soil, 1.0 wt% of metal powder produced from aluminum dross described in Example 4 was added, and mixed for 1 minute with a powder mixing device with stirring blades, and kept in a closed container for 20 days. The TCE content in the soil was measured after standing still at. As a result, the TCE concentration after treatment was 7.2 mg / kg, and the initial concentration was 2
It was greatly reduced from 9.4 mg / kg. The decomposition reaction rate constant was 0.07 day -1 .
【００４９】（実施例６）実施例４に記載のアルミドロ
スより製造した金属粉に、Ｆｅ粉を１ｗｔ%混合した
後、容量２Ｌの粉砕ポットに投入する。粉砕ポットには
さらに粉砕メディアとして２０ｍｍ径のＺｒＯ2ボール
を５ｋｇ投入し、回転ミルに設置した。そしてミルの回
転数を１００ｒｐｍとし２０分間粉砕処理をおこなっ
て、金属粉にＦｅ相を付着させた。ここで得られたＦｅ
相が付着した金属粉を用いて、実施例５に記載したのと
同様の模擬汚染土壌中のＴＣＥ分解試験を実施した。こ
の結果、処理後のＴＣＥ濃度５．４ｍｇ／ｋｇとなり、
初期濃度２９．４ｍｇ／ｋｇから大きく減少した。分解
反応速度定数は０．０８ｄａｙ-1であった。Example 6 1 wt% of Fe powder was mixed with the metal powder produced from the aluminum dross described in Example 4, and then charged into a crushing pot having a capacity of 2 L. Further, 5 kg of ZrO 2 balls having a diameter of 20 mm was put into the crushing pot as a crushing medium and set in a rotary mill. Then, the number of revolutions of the mill was set to 100 rpm, and pulverization processing was performed for 20 minutes to attach the Fe phase to the metal powder. Fe obtained here
A TCE degradation test in simulated contaminated soil similar to that described in Example 5 was performed using the phase-attached metal powder. As a result, the TCE concentration after treatment was 5.4 mg / kg,
The initial concentration was greatly reduced from 29.4 mg / kg. The decomposition reaction rate constant was 0.08 day -1 .
【００５０】（比較例２）Ｃを０．１ｗｔ％含有する平
均粒径５０μｍの鉄粉を用い、実施例３と同様のＴＣＥ
に対する分解試験を行なって、ＴＣＥ濃度の半減期と分
解反応速度定数とを求めた。この結果、半減期は１１．
６日、分解反応速度定数は０．０６ｄａｙ-1であった。(Comparative Example 2) The same TCE as in Example 3 was performed using iron powder containing 0.1 wt% of C and having an average particle size of 50 μm.
Was carried out to determine the half-life of TCE concentration and the decomposition reaction rate constant. As a result, the half-life is 11.
On the 6th, the decomposition reaction rate constant was 0.06 day -1 .
【００５１】[0051]
【発明の効果】以上詳述したように、本発明は、難分解
性の有機ハロゲン化合物を高速度で分解、浄化可能な金
属粉を、金属粉を構成する金属粒子がニッケルを主成分
とする相と鉄を主成分とする相とを有する金属粉、また
は、金属粉を構成する金属粒子がマンガンを主成分とす
る相とアルミニウムを主成分とする相とを有する金属
粉、または、アルミニウムの熔練工程で産するアルミド
ロスより構成された金属粉として提供するものである。As described in detail above, the present invention provides a metal powder capable of decomposing and purifying a hardly decomposable organic halogen compound at a high rate, in which the metal particles constituting the metal powder have nickel as a main component. Powder having a phase and a phase containing iron as the main component, or metal powder having metal particles forming the metal powder having a phase containing manganese as the main component and a phase containing aluminum as the main component, or aluminum It is provided as a metal powder composed of aluminum dross produced in the kneading process.
【図１】本発明に係る金属粉中の金属粒子を模式的に表
現した拡大図である。FIG. 1 is an enlarged view schematically showing metal particles in a metal powder according to the present invention.
１．母材金属相 ２．付着金属相 ３．金属粒子 ４．金属粉 ５．母材金属相と付着金属相との界面 ｄ．付着金属相の付着膜厚 1. Base metal phase 2. Adhering metal phase 3. Metal particles 4. Metal powder 5. Interface between base metal phase and adherent metal phase d. Thickness of deposited metal phase
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０２Ｆ 1/58 Ｆターム(参考） 4D004 AA41 AB06 AC07 CA34 CC09 DA03 DA10 4D038 AA02 AB14 4K018 AA07 AA15 AA25 BA04 BA08 BA14 BB10 BC08 BC09 BC19 BD10 JA01 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme coat (reference) C02F 1/58 F term (reference) 4D004 AA41 AB06 AC07 CA34 CC09 DA03 DA10 4D038 AA02 AB14 4K018 AA07 AA15 AA25 BA04 BA08 BA14 BB10 BC08 BC09 BC19 BD10 JA01
Claims (8)
鉄を主成分とする相とを有することを特徴とする有機ハ
ロゲン化合物分解用金属粉。1. Metal particles constituting metal powder, wherein each of the metal particles comprises a phase containing nickel as a main component,
A metal powder for decomposing an organohalogen compound, which has a phase containing iron as a main component.
ニッケルを主成分とする相が点在して付着していること
を特徴とする請求項１に記載の有機ハロゲン化合物分解
用金属粉。2. The decomposition of organohalogen compound according to claim 1, wherein the phase containing nickel as a main component is scattered and adhered to the surface of the phase containing iron as a main component. Metal powder.
が、０ｗｔ％を含まない２０ｗｔ％以下であることを特
徴とする請求項１または２に記載の有機ハロゲン化合物
分解用金属粉。3. The metal powder for decomposing organic halogen compounds according to claim 1, wherein the content of nickel in the metal powder is 20 wt% or less not including 0 wt%.
アルミニウムを主成分とする相とを有することを特徴と
する有機ハロゲン化合物分解用金属粉。4. Metal particles constituting metal powder, wherein each of the metal particles comprises a phase containing manganese as a main component,
A metal powder for decomposing an organic halogen compound, which has a phase containing aluminum as a main component.
面に、前記マンガンを主成分とする相が点在して付着し
ていることを特徴とする請求項４に記載の有機ハロゲン
化合物分解用金属粉。5. The decomposition of organohalogen compound according to claim 4, wherein the phase containing manganese as a main component is scattered and adhered to the surface of the phase containing aluminum as a main component. Metal powder.
が、０ｗｔ％を含まない３０ｗｔ％以下であることを特
徴とする請求項４または５に記載の有機ハロゲン化合物
分解用金属粉。6. The metal powder for decomposing organohalogen compounds according to claim 4, wherein the content of manganese in the metal powder is 30 wt% or less not including 0 wt%.
ドロスより製造される金属粉であって、酸化アルミニウ
ムを主成分とし、Ｃ、Ｎａ、Ｍｇ、Ａｌ、Ｓｉ、Ｃａ、
Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｚｎのいずれかの少な
くとも１種以上の元素を主成分とする相を含有すること
を特徴とする有機ハロゲン化合物分解用金属粉。7. A metal powder produced from aluminum dross produced in the aluminum melting step, which contains aluminum oxide as a main component and contains C, Na, Mg, Al, Si, Ca,
A metal powder for decomposing an organohalogen compound, comprising a phase containing at least one element selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn as a main component.
ハロゲン化合物分解用金属粉を用いることを特徴とす
る、土壌および／または地下水および／または地表水の
浄化方法。8. A method for purifying soil and / or groundwater and / or surface water, which comprises using the metal powder for decomposing an organic halogen compound according to any one of claims 1 to 7.
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|---|---|---|---|
| JP2001336808A JP2003136051A (en) | 2001-11-01 | 2001-11-01 | Metal powder for decomposing organic halogen compound and method for cleaning soil using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001336808A JP2003136051A (en) | 2001-11-01 | 2001-11-01 | Metal powder for decomposing organic halogen compound and method for cleaning soil using the same |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2007036892A Division JP4848540B2 (en) | 2007-02-16 | 2007-02-16 | Metal powder for decomposing organohalogen compounds, method for producing the same, and method for purifying soil and the like using the same |
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|---|---|
| JP2003136051A true JP2003136051A (en) | 2003-05-13 |
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ID=19151570
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