WO2022019327A1 - 過マンガン酸イオンを含む水の製造方法 - Google Patents
過マンガン酸イオンを含む水の製造方法 Download PDFInfo
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- WO2022019327A1 WO2022019327A1 PCT/JP2021/027308 JP2021027308W WO2022019327A1 WO 2022019327 A1 WO2022019327 A1 WO 2022019327A1 JP 2021027308 W JP2021027308 W JP 2021027308W WO 2022019327 A1 WO2022019327 A1 WO 2022019327A1
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- water
- divalent
- permanganate
- iron
- manganese
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/12—Complex oxides containing manganese and at least one other metal element
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Definitions
- the present invention relates to a method for producing water containing permanganate ions.
- Patent Document 1 The method for producing water containing permanganate ions reported by the present inventor in Patent Document 1 is highly evaluated by those skilled in the art because the permanganate ions can be stably present in water for a long period of time. ..
- Patent Document 1 when water containing permanganate ions is produced by this method, a precipitate is generated in the water, but the amount of the precipitate generated is large and the precipitate is generated. Since it takes several days to settle, it was later discovered that there was an inconvenience that it took time to filter the generated precipitate and ship it as a product. As for the cause of why it occurs, it was speculated that an organic iron compound was used as a raw material for production.
- the method for producing water containing a permanganate ion of the present invention comprises divalent inorganic iron compound and divalent in water having a pH of less than 3.5, as described in claim 1.
- the divalent inorganic iron compound is selected from iron (II) chloride, iron (II) sulfate, and iron (II) nitrate in the production method according to claim 1. It is one kind.
- a divalent inorganic iron compound is dissolved so that the concentration of divalent iron ions is 1 to 100 ppb.
- At least one divalent manganese compound is selected from manganese chloride (II), manganese sulfate (II), and manganese nitrate (II) in the production method according to claim 1. It is a seed. Further, in the production method according to claim 5, in the production method according to claim 1, the divalent manganese compound is dissolved so that the concentration of the divalent manganese ion is 0.1 ⁇ M to 1 mM. Further, the production method according to claim 6 does not further dissolve the inorganic salt in the production method according to claim 1. Further, in the manufacturing method according to claim 7, the pH is set to 5.0 to 9.0 after supplying ozone microbubbles to water in the manufacturing method according to claim 1.
- a divalent inorganic iron compound and a divalent manganese compound are dissolved in water having a pH of less than 3.5, and then ozone microbubbles are supplied to the water. It depends.
- a divalent inorganic iron compound and a divalent manganese compound are dissolved in water having a pH of less than 3.5.
- the reason why the pH of the water in which the divalent inorganic iron compound and the divalent manganese compound are dissolved is less than 3.5 is that when the divalent inorganic iron compound is dissolved in water having a pH of 3.5 or more, it is later added to water.
- trivalent iron oxide Fe 2 O 3
- divalent manganese compound when a divalent manganese compound is dissolved in water having a pH of 3.5 or higher, when ozone microbubbles are later supplied to the water, divalent manganese ions to trivalent manganese oxide (Mn 2 O 3 ) or This is because tetravalent manganese oxide (manganese dioxide: MnO 2 ) may be generated and precipitated, and permanganate ions may not be sufficiently generated.
- the pH of the water that dissolves the divalent inorganic iron compound and the divalent manganese compound is preferably less than 3.0.
- the water may be, for example, water having an electric conductivity of less than 300 ⁇ S / cm, and pure water having an electric conductivity of 3 ⁇ S / cm or less can be preferably used, but tap water or groundwater may also be used. ..
- an inorganic acid such as hydrochloric acid, sulfuric acid, or sulfuric acid as the acid for lowering the pH of water to less than 3.5.
- the divalent inorganic iron compound having a pH of less than 3.5 iron (II) chloride, iron (II) sulfate, iron (II) nitrate and the like can be used. It is desirable that the divalent inorganic iron compound is dissolved so that the concentration of the divalent iron ion is 1 to 100 ppb. If the concentration of divalent iron ions is less than 1 ppb, permanganate ions may not be sufficiently generated. On the other hand, when the concentration of divalent iron ions exceeds 100 ppb, when ozone microbubbles are later supplied to water, trivalent iron oxide (Fe 2 O 3 ) is easily generated from the divalent iron ions and precipitates. There is a risk of becoming.
- divalent manganese ion when the concentration of divalent manganese ion exceeds 1 mM, when ozone microbubbles are later supplied to water, divalent manganese ion to trivalent manganese oxide (Mn 2 O 3 ) or tetravalent manganese oxide (Mn 2 O 3) Manganese dioxide: MnO 2 ) may be generated and easily settled. It is more desirable that the divalent manganese compound is dissolved so that the concentration of the divalent manganese ion is 1 to 100 ⁇ M.
- the order of dissolution of the divalent inorganic iron compound and the divalent manganese compound in water having a pH of less than 3.5 is not particularly limited, and the compounds may be dissolved at the same time or in stages. ..
- sodium chloride, potassium chloride, magnesium chloride, magnesium sulfate, etc. are used as in the method for producing water containing permanganate ions described in Patent Document 1. Does not require further dissolution of the inorganic salt of. Further dissolution of the inorganic salt does not adversely affect the production of water containing permanganate ions by the method of the present invention, but may limit the use of the produced water containing permanganate ions. Therefore, it is desirable that the inorganic salt is not further dissolved (it is not desirable to apply it to water having a high salinity such as electric equipment).
- ozone microbubbles are supplied for a predetermined time, for example, 1 minute to 24 hours in water having a pH of less than 3.5 in which a divalent inorganic iron compound and a divalent manganese compound are dissolved.
- the method of supplying ozone microbubbles to water may be a method known per se, and a microbubble generator by a two-phase flow swirling method or a pressure dissolution method capable of generating microbubbles having a particle size of 5 to 50 ⁇ m. Can be done using.
- ozone is forcibly generated inside a microbubble by using a rotor or the like to forcibly generate a vortex flow with a radius of 10 cm or less, and to include obstacles such as walls and fluids with different relative velocities inside the microbubbles.
- a desired ozone microbubble can be generated by dispersing the gas component acquired in the vortex flow with the disappearance of the vortex.
- the pressure dissolution method is adopted, the ozone contained in the microbubbles is dissolved in water under a high pressure of 2 atm or more, and then the ozone is released to the atmospheric pressure from the supersaturation condition of the dissolved gas.
- the ozone microbubbles generated by these methods have a particle size of 50 ⁇ m or less, and the particle size peaks at 10 to 15 ⁇ m when measured by a laser light blocking type submerged particle counter (for example, LiQuilaz-E20 manufactured by SPM).
- the number of microbubbles in the peak region is 1000 cells / mL or more (see JP-A-2000-51107, JP-A-2003-265938, etc., if necessary).
- Examples of the ozone gas used for supplying ozone microbubbles into water include those prepared to a concentration of 1 to 300 g / Nm 3 using a commercially available oxygen source ozone generator.
- ozone gas having a concentration of less than 1 g / Nm 3 When ozone gas having a concentration of less than 1 g / Nm 3 is used, a large amount of ozone microbubbles may not be efficiently supplied into the water. On the other hand, it is difficult to prepare ozone gas having a concentration of more than 300 g / Nm 3.
- the ozone gas may contain oxygen, nitrogen, or the like in addition to ozone.
- the pH of water containing permanganate ions is set to 5.0 to 9.0, a precipitate is generated in the water, but the amount of the generated precipitate is small and the generation is settled within a short time. .. Therefore, for example, the next day when the pH of water containing permanganate ions is adjusted to 5.0 to 9.0, the generated precipitate can be filtered and shipped as a product.
- Example 1 In a glass container having a volume of 15 L, put 10 L of ultrapure water having an electric conductivity of 0.06 ⁇ S / cm, add hydrochloric acid to adjust the pH to 2.8, and then add iron (II) chloride. It was dissolved so that the concentration of divalent iron ions was about 25 ppb, and manganese chloride (II) was dissolved so that the concentration of divalent manganese ions was 50 ⁇ M. Ozone microbubbles having a particle size of 15 to 50 ⁇ m were generated in this liquid using a pressure-dissolving type microbubble generator and supplied for 10 minutes. The device was driven by circulating the water inside.
- the concentration of permanganate ion in the water containing permanganate ion thus produced is about 10 ⁇ M (the height of the peak group of permanganate ion measured by the ultraviolet-visible near-infrared spectrophotometer is used as the standard solution for permanganate.
- Example 2 Examples except that instead of the operation of adjusting the pH of water by adding sodium hydroxide in Example 1 to 7.0, the amount of sodium hydroxide to be added is reduced to adjust the pH to 5.5.
- Water containing caustic acid ion was produced by the same method as in 1.
- the permanganate ion concentration of the water containing the permanganate ion thus produced was about 10 ⁇ M, and the salinity was about 0.03%.
- the half-life of the permanganate ion of the water containing the permanganate ion and the measurement result by the electron spin resonance apparatus were the same as those of the water containing the permanganate ion produced in Example 1.
- Example 3 Water containing permanganate ions was produced by the same method as in Example 1 except that iron (II) sulfate was added instead of iron (II) chloride.
- the permanganate ion concentration of the water containing the permanganate ion thus produced was about 10 ⁇ M, and the salinity was about 0.05%.
- the half-life of the permanganate ion of the water containing the permanganate ion and the measurement result by the electron spin resonance apparatus were the same as those of the water containing the permanganate ion produced in Example 1.
- Example 4 Water containing permanganate ions was produced by the same method as in Example 1 except that manganese sulfate (II) was added instead of manganese (II) chloride.
- the permanganate ion concentration of the water containing the permanganate ion thus produced was about 10 ⁇ M, and the salinity was about 0.05%.
- the half-life of the permanganate ion of the water containing the permanganate ion and the measurement result by the electron spin resonance apparatus were the same as those of the water containing the permanganate ion produced in Example 1.
- Example 5 When the bactericidal effect of the water containing permanganate ion produced in Example 1 against the pathogenic bacterium Salmonella enterica was examined, an excellent bactericidal effect was observed.
- Example 6 When the water containing permanganate ion produced in Example 1 was orally administered to the primary chicks in which SPF eggs of Line-M chickens were hatched and the toxicity was examined, no toxicity was observed.
- Example 7 When the cytotoxicity of the permanganate ion-containing water produced in Example 1 to chicken fetal fibroblasts (CEF cells) was examined, no cytotoxicity was observed.
- the present invention has industrial applicability in that it can provide a novel method for producing water in which permanganate ions are stably present for a long period of time without using an organic iron compound as a production raw material.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
また、請求項2記載の製造方法は、請求項1記載の製造方法において、2価の無機鉄化合物が、塩化鉄(II)、硫酸鉄(II)、硝酸鉄(II)から選択される少なくとも1種である。
また、請求項3記載の製造方法は、請求項1記載の製造方法において、2価の鉄イオンの濃度が1~100ppbとなるように2価の無機鉄化合物を溶解する。
また、請求項4記載の製造方法は、請求項1記載の製造方法において、2価のマンガン化合物が、塩化マンガン(II)、硫酸マンガン(II)、硝酸マンガン(II)から選択される少なくとも1種である。
また、請求項5記載の製造方法は、請求項1記載の製造方法において、2価のマンガンイオンの濃度が0.1μM~1mMとなるように2価のマンガン化合物を溶解する。
また、請求項6記載の製造方法は、請求項1記載の製造方法において、無機塩をさらに溶解しない。
また、請求項7記載の製造方法は、請求項1記載の製造方法において、水中にオゾンマイクロバブルを供給した後にpHを5.0~9.0にする。
容積が15Lのガラス製容器に、電気伝導度が0.06μS/cmである超純水を10L入れ、そこに塩酸を添加してpHを2.8に調整した後、塩化鉄(II)を2価の鉄イオン濃度が約25ppbとなるように溶解するとともに、塩化マンガン(II)を2価のマンガンイオンの濃度が50μMとなるように溶解した。この液中に、加圧溶解型のマイクロバブル発生装置を用い、粒径が15~50μmのオゾンマイクロバブルを発生させて10分間供給した。装置は内部の水を循環させながら駆動させた。マイクロバブル発生装置には、酸素源オゾン発生装置を用いて約50g/Nm3の濃度で調製したオゾンガスを約1L/分で供給した。10分後、水は淡いピンク色を呈し、水中に過マンガン酸イオンが生成したことを予感させた。マイクロバブル発生装置の駆動を停止した後、水酸化ナトリウムを添加してpHを7.0に調整し、室内環境下で一昼夜自然放置してから、pHを7.0に調整した際に水中に発生した少量の沈殿物を1.2μmのメンブレンフィルタで濾過して除去した(それ以降の沈殿物のさらなる発生は認められなかった)。得られた濾液を紫外可視近赤外分光光度計で測定したところ、500-600nm付近に過マンガン酸イオンのピーク群が存在した(蒸留水に塩化ナトリウムを溶解して塩分濃度を0.25%にしてから過マンガン酸カリウムを溶解することで製造した過マンガン酸イオンを含む水について同じ条件で測定を行うことで同じ場所に同じ形状のピーク群が存在することを確認)。
実施例1における水酸化ナトリウムを添加することによる水のpHを7.0に調整する操作のかわりに、添加する水酸化ナトリウムの量を減らしてpHを5.5に調整すること以外は実施例1と同様の方法で、過マンガン酸イオンを含む水を製造した。こうして製造した過マンガン酸イオンを含む水の過マンガン酸イオン濃度は約10μMであり、塩分濃度は約0.03%であった。この過マンガン酸イオンを含む水の過マンガン酸イオンの半減期と電子スピン共鳴装置による測定結果は、実施例1で製造した過マンガン酸イオンを含む水のものと同じであった。
塩化鉄(II)にかわりに硫酸鉄(II)を添加すること以外は実施例1と同様の方法で、過マンガン酸イオンを含む水を製造した。こうして製造した過マンガン酸イオンを含む水の過マンガン酸イオン濃度は約10μMであり、塩分濃度は約0.05%であった。この過マンガン酸イオンを含む水の過マンガン酸イオンの半減期と電子スピン共鳴装置による測定結果は、実施例1で製造した過マンガン酸イオンを含む水のものと同じであった。
塩化マンガン(II)にかわりに硫酸マンガン(II)を添加すること以外は実施例1と同様の方法で、過マンガン酸イオンを含む水を製造した。こうして製造した過マンガン酸イオンを含む水の過マンガン酸イオン濃度は約10μMであり、塩分濃度は約0.05%であった。この過マンガン酸イオンを含む水の過マンガン酸イオンの半減期と電子スピン共鳴装置による測定結果は、実施例1で製造した過マンガン酸イオンを含む水のものと同じであった。
実施例1で製造した過マンガン酸イオンを含む水の、病原菌であるサルモネラ・エンテリティディス(Salmonella Enteritidis)に対する殺菌効果を調べたところ、優れた殺菌効果が認められた。
実施例1で製造した過マンガン酸イオンを含む水を、Line-M系ニワトリのSPF卵を孵化させた初生ヒナに経口投与して毒性を調べたところ、毒性は認められなかった。
実施例1で製造した過マンガン酸イオンを含む水の、ニワトリ胎児線維芽細胞(CEF細胞)に対する細胞毒性を調べたところ、細胞毒性は認められなかった。
Claims (7)
- pHが3.5未満の水に、2価の無機鉄化合物と2価のマンガン化合物を溶解した後、水中にオゾンマイクロバブルを供給することによる過マンガン酸イオンを含む水の製造方法。
- 2価の無機鉄化合物が、塩化鉄(II)、硫酸鉄(II)、硝酸鉄(II)から選択される少なくとも1種である請求項1記載の製造方法。
- 2価の鉄イオンの濃度が1~100ppbとなるように2価の無機鉄化合物を溶解する請求項1記載の製造方法。
- 2価のマンガン化合物が、塩化マンガン(II)、硫酸マンガン(II)、硝酸マンガン(II)から選択される少なくとも1種である請求項1記載の製造方法。
- 2価のマンガンイオンの濃度が0.1μM~1mMとなるように2価のマンガン化合物を溶解する請求項1記載の製造方法。
- 無機塩をさらに溶解しない請求項1記載の製造方法。
- 水中にオゾンマイクロバブルを供給した後にpHを5.0~9.0にする請求項1記載の製造方法。
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| JP2022538039A JP7670357B2 (ja) | 2020-07-22 | 2021-07-21 | 過マンガン酸イオンを含む水の製造方法 |
| US18/015,704 US12391587B2 (en) | 2020-07-22 | 2021-07-21 | Method for producing water containing permanganate ions |
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| WO2016017820A1 (ja) * | 2014-08-01 | 2016-02-04 | 国立研究開発法人産業技術総合研究所 | 過マンガン酸イオンを含む水およびその製造方法 |
| CN106745956A (zh) * | 2016-11-16 | 2017-05-31 | 安徽建筑大学 | 一种高pH源水的氧化过滤除锰除铁方法 |
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| WO2016017820A1 (ja) * | 2014-08-01 | 2016-02-04 | 国立研究開発法人産業技術総合研究所 | 過マンガン酸イオンを含む水およびその製造方法 |
| CN107540021A (zh) * | 2016-06-23 | 2018-01-05 | 中国科学院过程工程研究所 | 含有非锰元素的四氧化三锰复合物、制备方法、使用的反应系统及其用途 |
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| WO2025192689A1 (ja) * | 2024-03-14 | 2025-09-18 | 国立大学法人東北大学 | 機能水の製造方法 |
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| US12391587B2 (en) | 2025-08-19 |
| US20230286840A1 (en) | 2023-09-14 |
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| JPWO2022019327A1 (ja) | 2022-01-27 |
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