JP4622576B2 - Water purifier, water purification system and water purification method using the same - Google Patents
Water purifier, water purification system and water purification method using the same Download PDFInfo
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Description
本発明は、水道蛇口に接続して水道水の浄化を行う浄水器に関するもので、より詳しくは浄水ホース内の細菌汚染を防止するために、例えば、ハロゲン化銀、硝酸銀、硫酸銀、硫化銀、リン酸銀、銀ゼオライトに代表される抗菌性物質の溶出能を有する吸着剤を少なくとも１種類用いる浄水器に関する。 The present invention relates to a water purifier that is connected to a water tap and purifies tap water. More specifically, in order to prevent bacterial contamination in the water purification hose, for example, silver halide, silver nitrate, silver sulfate, silver sulfide. The present invention relates to a water purifier using at least one adsorbent having an ability to elute antibacterial substances typified by silver phosphate and silver zeolite.
従来、水道蛇口に接続して水道水を浄化する浄水器のカ−トリッジとしては、活性炭や中空糸膜を充填したものが多く知られている。これらのろ過材料を通過させることにより水道水が浄化されるのであるが、ろ過材料の能力には限りがあるため、使用者は必要に応じて新しいカ−トリッジに交換する。 2. Description of the Related Art Conventionally, many water purifier cartridges that are connected to a water tap and purify tap water are filled with activated carbon or hollow fiber membranes. Although the tap water is purified by passing through these filter materials, the capacity of the filter material is limited, so the user replaces the cartridge with a new cartridge as necessary.
水道水に含まれる遊離残留塩素を分解するろ過材料としては、粒状活性炭や繊維状活性炭の成形体を用いることが多い。この活性炭浄水器の通水を停止した状態では浄水器内の塩素が除去されているため空気中の細菌が浄水器内に入り、時間の経過と共に繁殖しやすいので衛生的見地からは好ましくない。そこで汚染防止を目的として、浄水流出側に殺菌剤を設け不使用時外部からの雑菌の進入を防止する浄水器（例えば特許文献１）や、不溶性で接触殺菌作用を有する抗菌剤を浄水流路の内表面に固着した浄水器（例えば特許文献２）、さらには抗菌性プラスチック焼結フィルターを配設した浄水器（例えば特許文献３）が提案されている。しかしながら、これらの浄水器では、抗菌剤を浄水流路の内表面もしくは流路のある一断面に設けるだけであるので、水のごく一部が抗菌剤に接触するだけであるため、充分な抗菌作用を発揮することが出来ない。また、一度浄水流路が汚染されると殺菌することが出来ない。
本発明は、上述のような問題点に鑑み、抗菌能を有する吸着剤を数種類混合するだけでは安全性や寿命の両者を満足できないが、吸着剤を配置する順序および、好ましくは混合状態を規定することにより両者を満足する性能を有することを見出した。 In view of the above problems, the present invention cannot satisfy both safety and life by mixing several kinds of adsorbents having antibacterial ability, but defines the order of adsorbent placement, and preferably the mixing state. By doing so, it has been found that it has a performance satisfying both.
すなわち本発明は、遊離残留塩素を分解する性能が高く、浄水器内部に溜まった水の細菌増殖および重金属を長期間に渡って抑制することができるとともに、安全性の高い飲料水を製造できる浄水器を提供するものである。 That is, the present invention has a high performance for decomposing free residual chlorine, can suppress bacterial growth and heavy metals accumulated in the water purifier for a long period of time, and can produce highly safe drinking water. A container is provided.
上記課題を解決するための本発明は、次の（１）〜（６）を特徴とするものである。 The present invention for solving the above-described problems is characterized by the following (1) to ( 6 ).
（１）中空糸膜束および少なくとも２種以上の吸着剤を含有し、吸着剤を含む層を少なくとも３層有してなる浄水器であって、前記吸着剤を含む層として、最上流側に重金属吸着能を有する吸着剤からなる重金属吸着層、最下流側に抗菌剤吸着能を有する粒状の銀無し活性炭からなる抗菌剤吸着層、および前記重金属吸着層と前記抗菌剤吸着層の間に抗菌能を有する吸着剤を少なくとも１種含有してなる抗菌層を配置しており、前記抗菌層は銀添着活性炭（Ｃ）と銀無し活性炭（Ｄ）を含有し、その体積比率Ｃ／Ｄが６０／４０〜８５／１５％であることを特徴とする浄水器。 (1) A water purifier containing a hollow fiber membrane bundle and at least two or more kinds of adsorbents, and having at least three layers containing adsorbents, wherein A heavy metal adsorption layer comprising an adsorbent having a heavy metal adsorption capacity, an antibacterial adsorption layer comprising granular silver-free activated carbon having an antibacterial substance adsorption capacity on the most downstream side, and an antibacterial layer between the heavy metal adsorption layer and the antibacterial agent adsorption layer An antibacterial layer containing at least one adsorbent having a function is disposed , and the antibacterial layer contains silver-impregnated activated carbon (C) and silver-free activated carbon (D), and the volume ratio C / D is 60. A water purifier characterized by being / 40 to 85/15% .
（２）前記銀添着活性炭の体積比率が浄水器に含まれる活性炭全体量の６０％以下であることを特徴とする（１）に記載の浄水器。 (2) water purifier according to (1) the volume ratio of the silver-impregnated activated carbon is less than 60% of the total amount of activated carbon contained in the water purifier.
（３）重金属吸着層を形成する吸着剤が、鉛吸着剤添着活性炭であることを特徴とする（１）または（２）に記載の浄水器。 ( 3 ) The water purifier according to (1) or (2) , wherein the adsorbent forming the heavy metal adsorbing layer is activated carbon adsorbed with lead adsorbent.
（４）重金属吸着層を形成する吸着剤、抗菌剤吸着層を形成する粒状の銀無し活性炭、抗菌層を形成する吸着剤の体積比率がそれぞれ８〜１２％、５５〜３０％、３７〜５８％であることを特徴とする（１）〜（３）のいずれかに記載の浄水器。 ( 4 ) The volume ratio of the adsorbent that forms the heavy metal adsorbing layer, the granular silver-free activated carbon that forms the antibacterial agent adsorbing layer, and the adsorbent that forms the antibacterial layer is 8 to 12%, 55 to 30%, and 37 to 58, respectively. % Of the water purifier according to any one of (1) to ( 3 ).
（５）（１）〜（４）のいずれかに記載の浄水器と、浄水ノズルと、給水栓とを備えている浄水システム。 ( 5 ) A water purification system comprising the water purifier according to any one of (1) to ( 4 ), a water purification nozzle, and a water tap.
（６）（１）〜（４）のいずれかに記載の浄水器を用いて浄水することを特徴とする浄水方法。 ( 6 ) A water purification method characterized by purifying water using the water purifier according to any one of (1) to ( 4 ).
本発明によれば、浄水器内部に溜まった水の細菌増殖および重金属を長期間に渡って抑制することができ、安全性および寿命の両者を満足する浄水器が提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the bacteria growth and heavy metal of the water which accumulated in the inside of a water purifier can be suppressed over a long period of time, and the water purifier which satisfies both safety | security and a lifetime can be provided.
以下に、本発明の望ましい実施の形態を説明する。 Hereinafter, preferred embodiments of the present invention will be described.
本発明は、中空糸膜束および少なくとも２種以上の吸着剤を含有し、吸着剤を含む層を少なくとも３層有してなる浄水器であって、前記吸着剤を含む層として、最上流側に重金属吸着能を有する吸着剤からなる重金属吸着層、最下流側に抗菌剤吸着能を有する吸着剤からなる抗菌剤吸着層、および前記重金属吸着層と前記抗菌剤吸着層の間に抗菌能を有する吸着剤を少なくとも１種含有してなる抗菌層を配置したことを特徴とする浄水器である。 The present invention is a water purifier comprising a hollow fiber membrane bundle and at least two or more kinds of adsorbents and having at least three layers containing adsorbents, wherein the layer containing the adsorbents is the most upstream side. An antibacterial agent adsorbing layer comprising an adsorbent having a heavy metal adsorbing ability, an antibacterial agent adsorbing layer comprising an adsorbent having an antibacterial agent adsorbing function on the most downstream side, and an antibacterial ability provided between the heavy metal adsorbing layer and the antibacterial agent adsorbing layer. It is a water purifier characterized by arranging an antibacterial layer containing at least one adsorbent.
ここで、本発明の中空糸膜束とは、例えば複数本の中空糸膜を束ねてストレート状或いはＵ字状に折り曲げた中空糸膜の集合体をいう。かかる中空糸膜の孔径は、１０μｍ以下であると好ましく、さらに好ましくは２μｍ以下である。さらに微小な固体を除去する場合には、孔径０．１μｍ以下のものを用いると好ましい。その素材としては、ポリアクリロニトリル、ポリフェニレンスルフォン、ポリフェニレンスルフィドスルフォン、ポリフツ化ビニリデン、ポリプロピレン、ポリエチレン、ポリスルホン、ポリビニルアルコール、酢酸セルロースやセラミック等の無機素材からなる群から選ばれる少なくとも１種を含んでいると好ましく、さらに好ましくはポリスルホンやポリフツ化ビニリデンが良い。 Here, the hollow fiber membrane bundle of the present invention refers to an aggregate of hollow fiber membranes obtained by bundling a plurality of hollow fiber membranes and bending them into a straight shape or a U shape. The hole diameter of such a hollow fiber membrane is preferably 10 μm or less, more preferably 2 μm or less. Furthermore, when removing a fine solid, it is preferable to use a thing with a hole diameter of 0.1 micrometer or less. The material includes at least one selected from the group consisting of polyacrylonitrile, polyphenylene sulfone, polyphenylene sulfide sulfone, polyvinylidene fluoride, polypropylene, polyethylene, polysulfone, polyvinyl alcohol, cellulose acetate, ceramics, and other inorganic materials. Polysulfone and polyvinylidene fluoride are more preferable.
最上流側に配置する重金属吸着能を有する吸着剤は、水道管から溶出する重金属、すなわち、水道管から吐出される水中に含まれる鉛、銅、亜鉛などの重金属を吸着させるためのものであり、中でも、重金属吸着層を構成する重金属吸着能を有する吸着剤としては鉛吸着剤添着活性炭が好ましく用いられる。かかる鉛吸着剤添着活性炭としては、ゼオライト、酸化チタン、キレート樹脂、イオン交換樹脂などが例示できる。特に、ゼオライト、酸化チタンは、少量で鉛を吸着できる点で好ましく用いられる。 The adsorbent with the ability to adsorb heavy metals placed on the most upstream side is for adsorbing heavy metals eluted from water pipes, that is, heavy metals such as lead, copper, and zinc contained in water discharged from water pipes. Among these, as the adsorbent having the heavy metal adsorption capacity constituting the heavy metal adsorption layer, lead adsorbent-added activated carbon is preferably used. Examples of the lead adsorbent-impregnated activated carbon include zeolite, titanium oxide, chelate resin, and ion exchange resin. In particular, zeolite and titanium oxide are preferably used because they can adsorb lead in a small amount.
なお、重金属吸着層中には、本発明の目的を損なわない範囲内において、重金属吸着能を有する吸着剤以外の固体物質（例えば、重金属吸着層を形成する吸着剤を包むメッシュ構造物など）を含んでいても良い。例えば、粒状活性炭の表面に重金属吸着層を添着した鉛吸着剤添着活性炭を用いると、他の吸着剤層と粒径が揃えやすく、通水抵抗が大きくならない点で好ましい。ただし、重金属吸着層の容積を小さくするという観点から、該重金属吸着能を有する吸着剤以外の固体物質は、重金属吸着層中に含まれる固体物質の総重量の５％以下であることが好ましく、３％以下であることがより好ましい。なお、鉛吸着剤の吸着能力は、日本工業規格（ＪＩＳ）Ｓ３２０１に記載された方法で評価を行う。 In the heavy metal adsorbing layer, a solid material other than the adsorbent having heavy metal adsorbing ability (for example, a mesh structure enclosing the adsorbent forming the heavy metal adsorbing layer) is included within a range not impairing the object of the present invention. It may be included. For example, it is preferable to use a lead adsorbent-added activated carbon in which a heavy metal adsorbing layer is attached to the surface of granular activated carbon from the viewpoint that the particle diameter is easily aligned with other adsorbent layers and the water flow resistance does not increase. However, from the viewpoint of reducing the volume of the heavy metal adsorption layer, the solid material other than the adsorbent having the heavy metal adsorption capacity is preferably 5% or less of the total weight of the solid material contained in the heavy metal adsorption layer, More preferably, it is 3% or less. In addition, the adsorption capacity of the lead adsorbent is evaluated by the method described in Japanese Industrial Standard (JIS) S3201.
また本発明は、最下流側に抗菌剤吸着能を有する吸着剤からなる抗菌剤吸着層、および前記重金属吸着層と前記抗菌剤吸着層の間に抗菌能を有する吸着剤を少なくとも１種含有してなる抗菌層を配置することを必須とする。 The present invention also includes an antibacterial agent adsorbing layer comprising an adsorbent having antibacterial agent adsorbing ability on the most downstream side, and at least one adsorbent having antibacterial ability between the heavy metal adsorbing layer and the antibacterial agent adsorbing layer. It is essential to place an antibacterial layer.
すなわち、重金属吸着層と抗菌剤吸着層の間のいずれかの箇所に存在する抗菌層としては、抗菌能を有する吸着剤を少なくとも１種含有していることが必要であり、かかる抗菌能を有する吸着剤としては銀添着剤であることが好ましい。ここで、銀添着剤とは、ハロゲン化銀、硝酸銀、硫酸銀、硫化銀、リン酸銀、銀ゼオライトなどの銀化合物を吸着性物質の表面ないし内部に付着させた吸着剤を意味し、中でも、吸着剤として活性炭を用いた銀添着活性炭が好ましく用いられる。 That is, the antibacterial layer present at any location between the heavy metal adsorbing layer and the antibacterial agent adsorbing layer needs to contain at least one kind of adsorbent having antibacterial ability, and has such antibacterial ability. The adsorbent is preferably a silver additive. Here, the silver additive means an adsorbent obtained by adhering a silver compound such as silver halide, silver nitrate, silver sulfate, silver sulfide, silver phosphate, or silver zeolite to the surface or inside of the adsorbent substance. A silver-impregnated activated carbon using activated carbon as an adsorbent is preferably used.
また、前記抗菌層から溶出したハロゲン化銀、硝酸銀、硫酸銀、硫化銀、リン酸銀、銀ゼオライトなどの抗菌性物質（抗菌剤）が飲料水中に過剰に含まれないようにするため、最下流側に抗菌剤吸着能を有する吸着剤からなる抗菌剤吸着層を配置することが必要である。かかる吸着剤としては活性炭が好ましく用いられるが、前記重金属吸着層を構成する吸着剤と同種類の吸着剤を用いても良い。なお、抗菌剤吸着層中には、本発明の目的を損なわない範囲内において、抗菌剤吸着能を有する吸着剤以外の固体物質（例えば、抗菌剤吸着層を形成する吸着剤を包むメッシュ構造物など）を含んでいても良いが、前記抗菌剤吸着層と同様に抗菌剤吸着層の容積を小さくするという観点から、該抗菌剤吸着能を有する吸着剤以外の固体物質は、抗菌剤吸着層中に含まれる固体物質の総重量の１０％以下であることが好ましく、５％以下であることがより好ましい。 In order to prevent excessive amounts of antibacterial substances (antibacterial agents) such as silver halide, silver nitrate, silver sulfate, silver sulfide, silver phosphate, and silver zeolite eluted from the antibacterial layer, It is necessary to dispose an antibacterial agent adsorption layer made of an adsorbent having antibacterial agent adsorption ability on the downstream side. As such an adsorbent, activated carbon is preferably used, but the same kind of adsorbent as that constituting the heavy metal adsorption layer may be used. In addition, in the antibacterial agent adsorbing layer, a solid substance other than the adsorbent having the antibacterial agent adsorbing ability (for example, a mesh structure enclosing the adsorbent forming the antibacterial agent adsorbing layer within a range not impairing the object of the present invention. From the viewpoint of reducing the volume of the antibacterial agent adsorbing layer in the same manner as the antibacterial agent adsorbing layer, the solid substance other than the adsorbent having the antibacterial agent adsorbing ability is used as an antibacterial agent adsorbing layer. It is preferably 10% or less of the total weight of the solid substance contained therein, and more preferably 5% or less.
本発明で好ましく用いられる銀添着活性炭は、安全性及び抗菌性能の両者を満足する浄水器という観点から、体積比率にして浄水器に含まれる活性炭全体量の６０％以下であることが好ましく、体積比率で４０〜６０％であることがより好ましい。 The silver-impregnated activated carbon preferably used in the present invention is preferably 60% or less of the total amount of activated carbon contained in the water purifier as a volume ratio from the viewpoint of a water purifier satisfying both safety and antibacterial performance. More preferably, the ratio is 40 to 60%.
本発明では、抗菌層に含まれる吸着剤として銀添着活性炭と銀無し活性炭の混合物を用いることが銀溶出量を適度に制御することが可能となりより好ましい。ここで、銀無し活性炭とは、実質的に銀添着をしていない活性炭を意味する。 In the present invention, it is more preferable to use a mixture of silver-impregnated activated carbon and silver-free activated carbon as the adsorbent contained in the antibacterial layer because the amount of silver elution can be controlled appropriately. Here, the activated carbon without silver means activated carbon not substantially silver-added.
浄水器に含まれる吸着剤は、重金属吸着層を形成する吸着剤、抗菌剤吸着層を形成する吸着剤、抗菌層を形成する吸着剤の体積比率がそれぞれ８〜１２％、５５〜３０％、３７〜５８％であることが好ましく、また、抗菌層は銀添着活性炭（Ｃ）と銀無し活性炭（Ｄ）を含有し、その体積比率Ｃ／Ｄが６０／４０〜８５／１５％であることが好ましい。この範囲外であれば銀溶出量が少なくて抗菌効果が乏しい場合や、銀溶出量が多すぎて安全上および抗菌効果の寿命上好ましくない。かかる体積比率について、さらに好ましくは、重金属吸着層を形成する吸着剤、抗菌剤吸着層を形成する吸着剤、抗菌層を形成する吸着剤の体積比率がそれぞれ９〜１１％、５１〜３３％、４０〜５６％、また、Ｃ／Ｄ＝６６／３４〜８２／１８％である。 The adsorbent contained in the water purifier is composed of an adsorbent that forms a heavy metal adsorbing layer, an adsorbent that forms an antibacterial agent adsorbing layer, and an adsorbent that forms an antibacterial layer in a volume ratio of 8 to 12%, 55 to 30%, The antibacterial layer preferably contains silver-impregnated activated carbon (C) and silver-free activated carbon (D), and the volume ratio C / D is 60/40 to 85/15%. Is preferred. Outside this range, the amount of elution of silver is small and the antibacterial effect is poor, or the amount of elution of silver is too large, which is not preferable for safety and antibacterial effect life. More preferably, the volume ratio of the adsorbent that forms the heavy metal adsorbing layer, the adsorbent that forms the antibacterial agent adsorbing layer, and the adsorbent that forms the antibacterial layer is 9 to 11%, 51 to 33%, respectively. 40-56% and C / D = 66 / 34-82 / 18%.
このように銀の溶出は、長期間に渡って細菌の繁殖抑制効果が持続するように、且つ通水初期に大部分が溶出しないように銀を添着させた活性炭と銀無し活性炭および／または重金属吸着用活性炭を組み合わせて用いることが必要である。原子吸光光度計により求められる水中に溶出する銀濃度は、米国環境保護庁（ＥＰＡ）の飲料水質ガイドラインに健康へのリスクは無いと記載されている１００ｐｐｂ以下であれば良く、また、抗菌効果の点で５ｐｐｂ以上は必要である。 As described above, the elution of silver is activated carbon and silver-free activated carbon and / or heavy metal impregnated with silver so that the effect of inhibiting bacterial growth can be maintained over a long period of time and most of the elution is not eluted at the beginning of water flow. It is necessary to use activated carbon for adsorption in combination. The silver concentration eluting in water determined by an atomic absorption spectrophotometer may be 100 ppb or less as described in the drinking water quality guidelines of the US Environmental Protection Agency (EPA) as being no risk to health. A point of 5 ppb or more is necessary.
抗菌効果が有るとされる銀濃度が５ｐｐｂ以上を維持できる総通水量を銀寿命とすると、活性炭全体量に占める銀添着活性炭量が増えるほど寿命は長くなるが、銀濃度が１００ｐｐｂを超える場合が有り、安全上問題がある。浄水器の中で最後に銀無し活性炭などの抗菌剤吸着能を有する吸着剤からなる抗菌剤吸着層を配置するのは、何らかの理由で温水を通水した場合に銀溶出量が１００ｐｐｂを超える可能性が有り、これを防止するために銀無し活性炭で銀を吸着し、銀の溶出量を低下させるためである。 If the total water flow rate that can maintain a silver concentration of 5 ppb or more that has an antibacterial effect is defined as the silver life, the life increases as the amount of activated carbon impregnated in the total amount of activated carbon increases, but the silver concentration may exceed 100 ppb. Yes, there are safety issues. In the water purifier, the antibacterial adsorbing layer consisting of an adsorbent with antibacterial agent adsorbing ability such as silver-free activated carbon is arranged at the end. If warm water is passed for some reason, the silver elution amount may exceed 100ppb. This is because, in order to prevent this, silver is adsorbed with silver-free activated carbon to reduce the elution amount of silver.
通水時の銀溶出メカニズムは、水道水中の過剰な塩素イオンの存在により、活性炭表面近傍に析出した銀および／または銀化合物が酸化され、銀イオンとして溶出することに起因する。ここで用いる銀添着活性炭の形状は、球状、粉末状、繊維状、顆粒状、破砕状等のいずれでも良いが、なかでも粉末状または粒状が好ましい。銀添着活性炭の製造方法は、例えば硝酸銀溶液中に活性炭を入れ硝酸銀を吸着させながら活性炭表面近傍で還元処理を行い、金属銀、酸化銀、塩化銀を析出させる。その後、還元処理後の活性炭を洗浄し、硝酸イオンを取り除き脱水・乾燥を行うことで達成できる。 The silver elution mechanism at the time of passing water is due to the presence of excess chlorine ions in tap water, whereby silver and / or silver compounds deposited in the vicinity of the activated carbon surface are oxidized and eluted as silver ions. The shape of the silver-impregnated activated carbon used here may be any of spherical, powder, fiber, granule, crushed, etc., but powder or granule is preferred. For example, the silver-impregnated activated carbon is produced by depositing activated carbon in a silver nitrate solution and performing reduction treatment in the vicinity of the activated carbon surface while adsorbing silver nitrate to deposit metallic silver, silver oxide and silver chloride. Then, it can achieve by washing | cleaning the activated carbon after a reduction process, removing nitrate ion, and performing dehydration and drying.
本発明の浄水器を用いた浄水方法を採用すること、すなわち、本発明の浄水器と、浄水ノズル、給水栓を配した浄水システムを構築することにより、水の浄水効果がよく、使用を開始してから長期間に渡って細菌の繁殖が抑制される。 By adopting the water purification method using the water purifier of the present invention, that is, by constructing a water purification system including the water purifier of the present invention, a water purification nozzle, and a water tap, the water purification effect of water is good and the use is started. Then, bacterial growth is suppressed for a long time.
以下に実施例を記載して本発明をより具体的に説明する。なお、本発明はこの実施例に何ら限定されるものではない。 Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to this example.
以下に本発明の浄水器として好ましく用いられる、銀添着活性炭および銀無し活性炭と中空糸膜モジュールを装着した浄水器の一実施例を添付図面にて説明する。 An embodiment of a water purifier equipped with silver-impregnated activated carbon and silver-free activated carbon and a hollow fiber membrane module, which is preferably used as the water purifier of the present invention, will be described below with reference to the accompanying drawings.
図１は浄水器用カートリッジ１を示す。該カートリッジ断面図に示すように、ハウジング２の内部中央にポリスルホン中空糸膜モジュール１１を嵌入立設し、ポリスルホン中空糸膜モジュール１１の外周部と、１次フィルター５、２次フィルター６とに挟まれて形成された活性炭層２０に活性炭を充填してある。ポリスルホン中空糸膜モジュール１１は、筒状ケース１２の内部にポリスルホン中空糸膜１３を２，３００本Ｕ字状に束ねて収納し、その端部を硬化性樹脂１４（封止剤）で封止固定（ポッティング）したものである。浄水器用カートリッジには上記に示す以外にベース３やストッパー４、Ｏリング１５，１６から構成される。
FIG. 1 shows a water purifier cartridge 1. As shown in the sectional view of the cartridge, a polysulfone hollow
水道蛇口に設けられた浄水器用バルブを開くと水道水が原水受入口７から浄水器用カートリッジ１の内部に流入する。水道水は、まず浄水器用カートリッジの軸方向に流れ、１次フィルター５を通過後、活性炭層２０に入り、最上流側の鉛吸着剤添着活性炭２１で鉛などの重金属類が吸着除去される。次いで銀添着活性炭と銀無し活性炭の混合物２２、さらに最下流側の銀無し活性炭２３で安全性に問題のない範囲内で銀イオンが水中に溶出される。また、これら活性炭層で遊離残留塩素が長期間確実に分解される。活性炭層を経由した水は２次フィルター６を経て中空糸膜モジュールの中空糸膜により鉄サビや細菌などが除去され、浄水として浄水供給口８から給水栓（省略）に供給される。水栓から出る浄水を採水して、溶出する銀イオン濃度を原子吸光分析計により測定し、表１に示した。
When the water purifier valve provided in the water tap is opened, tap water flows into the water purifier cartridge 1 from the raw
［実施例１］
上述のカートリッジにおいて、最上流側の活性炭層に鉛吸着剤添着活性炭６０ｍｌを入れ、次いで銀添着活性炭２８０ｍｌと銀無し活性炭１４０ｍｌの混合品を入れ、最下流側に銀無し活性炭１４０ｍｌを入れた。浄水器を水道水蛇口に接続して４０℃、３Ｌ／分の通水量で通水し、通水量６Ｌから１５０Ｌまで約１５Ｌ毎に１００ｍｌ採水して溶出する銀濃度を原子吸光分析計により測定し、表１に結果を示した。銀イオン濃度は最大でも８２ｐｐｂとなり、基準値の１００ｐｐｂ以下とすることが出来た。
[Example 1]
In the above-mentioned cartridge, 60 ml of lead adsorbent-impregnated activated carbon was placed in the uppermost activated carbon layer, and then a mixture of 280 ml of silver-impregnated activated carbon and 140 ml of silver-free activated carbon was placed, and 140 ml of silver-free activated carbon was placed in the most downstream side. Connect a water purifier to a tap water faucet, and pass water at a flow rate of 3 L / min at 40 ° C. Collect 100 ml of water every 15 L from a flow rate of 6 L to 150 L, and measure the elution silver concentration with an atomic absorption spectrometer. Table 1 shows the results. The silver ion concentration was 82 ppb at the maximum, and it was able to be below the standard value of 100 ppb.
［実施例２］
実施例１と同様に、最上流側の活性炭層に鉛吸着剤添着活性炭７４ｍｌを入れ、次いで銀添着活性炭
３３２ｍｌと銀無し活性炭８４ｍｌの混合品を入れ、最下流側に銀無し活性炭１３０ｍｌを入れた。該浄水器を水道水蛇口に接続して４０℃、３Ｌ／分の通水量で通水し、通水量６Ｌから１５０Ｌまで約１５Ｌ毎に１００ｍｌ採水して溶出する銀濃度を原子吸光分析計により測定した。銀イオン濃度は最大でも７８ｐｐｂとなり、基準値の１００ｐｐｂ以下とすることが出来た。
[Example 2]
As in Example 1, 74 ml of lead adsorbent-impregnated activated carbon was placed in the uppermost activated carbon layer, then a mixture of 332 ml of silver-impregnated activated carbon and 84 ml of silver-free activated carbon was placed, and 130 ml of silver-free activated carbon was placed on the most downstream side. . The water purifier is connected to a tap water faucet, and water is passed at 40 ° C. and 3 L / min, and 100 ml is sampled every 15 L from a water flow rate of 6 L to 150 L. It was measured. The silver ion concentration was 78 ppb at the maximum, and could be below the standard value of 100 ppb.
［参考例］
実施例１と同様に、最上流側の活性炭層に鉛吸着剤添着活性炭６０ｍｌを入れた。次いで銀添着活性炭２８０ｍｌを入れた後、銀無し活性炭２８０ｍｌを入れて、３種類の活性炭で構成した。
該浄水器を水道水蛇口に接続して４０℃、３Ｌ／分の通水量で通水し、通水量６Ｌから１５０Ｌまで約１５Ｌ毎に１００ｍｌ採水して溶出する銀濃度を原子吸光分析計により測定した。銀イオン濃度は最大でも７４ｐｐｂとなり、基準値の１００ｐｐｂ以下とすることが出来た。
[ Reference example ]
In the same manner as in Example 1, 60 ml of lead adsorbent-added activated carbon was placed in the uppermost activated carbon layer. Next, after adding 280 ml of silver-impregnated activated carbon, 280 ml of silver-free activated carbon was added to form three types of activated carbon.
The water purifier is connected to a tap water faucet, and water is passed at 40 ° C. and 3 L / min, and 100 ml is sampled every 15 L from a water flow rate of 6 L to 150 L. It was measured. The silver ion concentration was 74 ppb at the maximum, and could be below the standard value of 100 ppb.
［比較例１］
最上流側の活性炭層に鉛吸着剤添着活性炭６０ｍｌを入れ、次いで銀添着活性炭５６０ｍｌを入れた以外は実施例１と同様の条件で通水を行った。
その結果、銀イオン濃度は４５Ｌ通水時に１１３ｐｐｂ、１２０Ｌ通水時に最大１３３ｐｐｂまで上昇し、基準値の１００ｐｐｂを上回る結果となった。
[Comparative Example 1]
Water was passed under the same conditions as in Example 1 except that 60 ml of lead adsorbent-added activated carbon was added to the most upstream activated carbon layer, and then 560 ml of silver-attached activated carbon was added.
As a result, the silver ion concentration increased to 113 ppb when passing 45 L, and increased to 133 ppb when passing 120 L, exceeding the standard value of 100 ppb.
［比較例２］
最上流側の活性炭層に銀添着活性炭５６０ｍｌを入れ、次いで鉛吸着剤添着活性炭６０ｍｌを入れた以外は実施例１と同様の条件で通水を行った。
その結果、銀イオン濃度は９０Ｌ通水時に最大１２２ｐｐｂまで上昇し、基準値の１００ｐｐｂを上回る結果となった。
[Comparative Example 2]
Water was passed under the same conditions as in Example 1 except that 560 ml of silver-impregnated activated carbon was added to the activated carbon layer on the most upstream side, and then 60 ml of lead-adsorbent-added activated carbon was added.
As a result, the silver ion concentration increased to a maximum of 122 ppb when water was passed through 90 L, and exceeded the standard value of 100 ppb.
１ カートリッジ
２ ハウジング
３ ベース（底部）
４ ストッパー（支持部材）
５ １次フィルター
６ ２次フィルター
７ 原水受入口
８ 浄水供給口
１１ 筒状ケース
１２ ポリスルホン中空糸膜モジュール
１３ ポリスルホン中空糸膜
１４ 硬化性樹脂
１５ Ｏリング
１６ Ｏリング
２０ 活性炭層
２１ 鉛吸着剤添着活性炭
２２ 銀添着活性炭＋銀無し活性炭の混合物
２３ 銀無し活性炭
1
4 Stopper (support member)
5
14 Curable resin 15 O-ring 16 O-ring 20
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| JP2003126846A (en) * | 2001-10-29 | 2003-05-07 | Kitz Corp | Cylindrical filter member, method for manufacturing it and water purifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4961950A (en) * | 1972-10-14 | 1974-06-15 | ||
| JPS60118285A (en) * | 1983-11-29 | 1985-06-25 | Toho Rayon Co Ltd | Water purifying filter and adsorbing unit having pasturizing property |
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| JPH0623265A (en) * | 1992-04-09 | 1994-02-01 | Takeda Chem Ind Ltd | Water purifying material, production therefor and purifying method |
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| JP2003126846A (en) * | 2001-10-29 | 2003-05-07 | Kitz Corp | Cylindrical filter member, method for manufacturing it and water purifier |
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