JPH0312233A - Active carbon based adsorbent - Google Patents

Active carbon based adsorbent

Info

Publication number
JPH0312233A
JPH0312233A JP14717889A JP14717889A JPH0312233A JP H0312233 A JPH0312233 A JP H0312233A JP 14717889 A JP14717889 A JP 14717889A JP 14717889 A JP14717889 A JP 14717889A JP H0312233 A JPH0312233 A JP H0312233A
Authority
JP
Japan
Prior art keywords
adsorbent
active carbon
activated carbon
water
low
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
Application number
JP14717889A
Other languages
Japanese (ja)
Inventor
Tomoko Yonehara
米原 智子
Yoshikazu Terai
寺井 義和
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unitika Ltd
Original Assignee
Unitika Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Unitika Ltd filed Critical Unitika Ltd
Priority to JP14717889A priority Critical patent/JPH0312233A/en
Publication of JPH0312233A publication Critical patent/JPH0312233A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide an adsorbent with hydrophilic properties, make the permeation of water easy and manufacture a subject material to remove effectively materials dissolved in water by means of static adsorption at low cost by applying low temperature plasma treatment to active carbon only or a mixture of active carbon and some other material. CONSTITUTION:An active carbon group adsorbent suitable for the purpose of treating water or aqueous liquid can be prepared by applying the low temperature plasma treatment to active carbon only or a mixture composed of active carbon and some other material (For instance, natural fiber, synthetic fiber, pulp or the like is used). The generating process of low plasma is carried out by exhaust vacuumizing a vacuum container containing a sample by means of a vacuum pump, introducing the given gas therein, adjusting the same at the given vacuum degree and then applying electric energy and generating glow discharge.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、水又は水性液体の処理に適した活性炭系吸着
材に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an activated carbon-based adsorbent suitable for treating water or aqueous liquids.

(従来の技術) 一般に活性炭は疎水性であり、このため、活性炭系の吸
着材には、水が浸透しにくい。
(Prior Art) Activated carbon is generally hydrophobic, and therefore water is difficult to penetrate into activated carbon-based adsorbents.

したがって、この吸着材を用いて水中の溶存物質を除去
する場合、媒体である水が吸着材に浸透しにくいので、
単に吸着材を溶液中に投入又は設置するするだけのいわ
ゆる静吸着では、溶存物質の除去能力が低いという欠点
があった。
Therefore, when using this adsorbent to remove dissolved substances in water, it is difficult for the water medium to penetrate into the adsorbent.
So-called static adsorption, in which an adsorbent is simply placed or placed in a solution, has the disadvantage of a low ability to remove dissolved substances.

上記の欠点を解消するためには、処理対象溶液を流動さ
せるか、又は吸着材を流動させて強制的に水を吸着材に
浸透させる動吸着を行う必要があり、吸着材の使用形態
が制約されたり、コスト高になるという問題があった。
In order to eliminate the above drawbacks, it is necessary to perform dynamic adsorption, in which the solution to be treated is made to flow or the adsorbent is made to flow and water is forced to penetrate into the adsorbent, which limits the way in which the adsorbent is used. There have been problems in that the cost has increased.

(発明が解決しようとする課題) 本発明は、上記の課題を解決し、水中溶存物質を除去す
る際の吸着材に対する水の浸透性の悪さが改善され、静
吸着においても氷中溶存物質の除去能力が向上した活性
炭系吸着材を提供することを技術的な課題とするもので
ある。
(Problems to be Solved by the Invention) The present invention solves the above problems, improves the poor permeability of water to an adsorbent when removing substances dissolved in water, and improves the ability to remove substances dissolved in ice even in static adsorption. The technical objective is to provide an activated carbon-based adsorbent with improved removal ability.

(課題を解決するための手段) 本発明者らは、上記の課題を解決するために鋭意検討し
た結果、活性炭単独又は活性炭と他の材料からなる吸着
材に低温プラズマ処理を施すことにより、吸着材に親水
性が付与され、水が吸着材に浸透しやすくなることを知
見して本発明に到達した。
(Means for Solving the Problems) As a result of intensive studies to solve the above problems, the present inventors have discovered that adsorption can be achieved by subjecting activated carbon alone or an adsorbent made of activated carbon and other materials to low-temperature plasma treatment. The present invention was achieved based on the finding that hydrophilicity is imparted to the adsorbent, making it easier for water to penetrate into the adsorbent.

すなわち1本発明は、活性炭単独又は活性炭と他の材料
からなる混合物に低温プラズマ処理が施されていること
を特徴とする活性炭系吸着材を要旨とするものである。
That is, one aspect of the present invention is an activated carbon-based adsorbent characterized in that activated carbon alone or a mixture of activated carbon and other materials is subjected to low-temperature plasma treatment.

以下2本発明の詳細な説明する。Two aspects of the present invention will be described in detail below.

本発明の活性炭系吸着材は、活性炭単独又は活性炭と他
の材料からなる混合物であるが、活性炭としては、粉状
2粒状、繊維状のいずれの形状でもよく、原料、製造方
法等についても特に限定されるものではない。
The activated carbon-based adsorbent of the present invention is activated carbon alone or a mixture of activated carbon and other materials, but the activated carbon may be in any form of powder, 2 grains, or fibers, and there are also particular details regarding the raw materials, manufacturing method, etc. It is not limited.

また、活性炭と混合する他の材料としては9通常の天然
繊維1合成繊維、パルプ等を用いることが可能であり、
混合割合としては、吸着材中における活性炭の割合を5
重量%以上にすることが吸着性を保持する点から好まし
い。
In addition, as other materials to be mixed with activated carbon, it is possible to use 9 ordinary natural fibers, 1 synthetic fiber, pulp, etc.
As for the mixing ratio, the ratio of activated carbon in the adsorbent is 5
It is preferable to make the amount more than % by weight from the viewpoint of maintaining adsorption properties.

本発明の活性炭系吸着材は、上記の活性炭単独又は活性
炭と他の材料からなる混合物に低温プラズマ処理が施さ
れたものであり、低温プラズマ処理による水酸基等の親
水性基の導入や表面酸化等によって活性炭の表面に親水
性が付与されたものである。
The activated carbon-based adsorbent of the present invention is obtained by subjecting the above-mentioned activated carbon alone or a mixture of activated carbon and other materials to low-temperature plasma treatment, and includes introduction of hydrophilic groups such as hydroxyl groups, surface oxidation, etc. Hydrophilic properties are imparted to the surface of the activated carbon.

通常の活性炭は疎水性であり、そのため、活性炭を主成
分とする吸着材を用いて水中の溶存物質を除去する場合
、媒体である水が吸着材に浸透しにくいので、溶存物質
の除去能力が低いという欠点がある。
Ordinary activated carbon is hydrophobic, so when removing dissolved substances in water using an adsorbent whose main component is activated carbon, the ability to remove dissolved substances is limited because water, the medium, has difficulty penetrating the adsorbent. It has the disadvantage of being low.

しかるに1本発明の活性炭系吸着材は、低温プラズマ処
理によって親水性が付与されているので。
However, the activated carbon-based adsorbent of the present invention is rendered hydrophilic by low-temperature plasma treatment.

水中の溶存物質を除去する用途に用いても、媒体である
水が吸着材によく浸透する。したがって。
Even when used to remove dissolved substances in water, water as a medium penetrates well into the adsorbent. therefore.

本発明の吸着材を用いて水中の溶存物質を除去する場合
、処理対象溶液を流動させるか、又は吸着材を流動させ
て強制的に水を吸着材に浸透させる動吸着を行う場合は
勿論のこと、単に吸着材を溶液中に投入又は設置するす
るだけのいわゆる静吸着においても、溶存物質の除去能
力が著しく向上する。このため1本発明の活性炭系吸着
材は、水溶液や親水性溶媒中に溶存する種々の物質を吸
着する用途1例えば、しょ糖液の脱色精製、アルコール
飲料の精製、下水や廃水の処理、上水処理等に好適な吸
着材である。
When removing dissolved substances in water using the adsorbent of the present invention, it is of course possible to perform dynamic adsorption in which the solution to be treated is fluidized or the adsorbent is fluidized to force water to permeate into the adsorbent. Even in so-called static adsorption, in which an adsorbent is simply placed or placed in a solution, the ability to remove dissolved substances is significantly improved. Therefore, the activated carbon-based adsorbent of the present invention can be used for adsorbing various substances dissolved in aqueous solutions or hydrophilic solvents. It is an adsorbent suitable for processing, etc.

上述したように1本発明の活性炭系吸着材は。As mentioned above, one of the activated carbon-based adsorbents of the present invention is:

低温プラズマ処理によって親水性が付与されたものであ
るが、低温プラズマとは、低圧下のアルゴン、窒素、酸
素、−酸酸化炭素中空気の気体中でグロー放電を起こす
ことにより生起される気体粒子が電離状態で励起活性化
状態にある非平衡プラズマのことである。
Hydrophilic properties are imparted through low-temperature plasma treatment, and low-temperature plasma refers to gas particles generated by glow discharge in air gases in argon, nitrogen, oxygen, and acidic carbon oxides under low pressure. is a non-equilibrium plasma in which the plasma is in an ionized state and is in an excited and activated state.

一般に、低温プラズマの発生方法としては、試料を入れ
た真空容器を真空ポンプにより排気減圧し、所定の気体
を導入して0.1〜2.0Torrの範囲内で一定の真
空度に調整した後、電気エネルギーを印加してグロー放
電を起こさせる方法がある。このときのエネルギー源と
しては、直流電圧印加。
Generally, the method for generating low-temperature plasma is to evacuate and reduce the pressure of a vacuum container containing a sample with a vacuum pump, introduce a specified gas, and adjust the degree of vacuum to a constant level within the range of 0.1 to 2.0 Torr. There is a method of applying electrical energy to cause glow discharge. The energy source at this time is DC voltage application.

交流電圧印加のいずれの方法でもよいが、一般にはIK
七〜3000M七の高周波を0.1〜IW/calの出
力で印加する方法が代表的である。
Any method of applying AC voltage may be used, but generally IK
A typical method is to apply a high frequency of 7 to 3000M7 with an output of 0.1 to IW/cal.

本発明の活性炭系吸着材の製造においても、上述のよう
な方法で生起する低温プラズマを使用すればよい。この
ときの低温プラズマ処理条件は特に限定されるものでは
ないが1例えば、アルゴン。
In the production of the activated carbon-based adsorbent of the present invention, low-temperature plasma generated by the method described above may be used. The low-temperature plasma treatment conditions at this time are not particularly limited; for example, argon.

空気、窒素、酸素等の気体を用い、真空度0.5〜2.
0Torrにて、 13.56MHzの高周波を用いて
0.5〜IW/ ctlで印加し9発生するプラズマで
30秒〜3分間処理するのが好ましい。
Using a gas such as air, nitrogen, or oxygen, the degree of vacuum is 0.5 to 2.
It is preferable to perform the treatment with plasma generated at 0 Torr using a high frequency of 13.56 MHz at 0.5 to IW/ctl for 30 seconds to 3 minutes.

(実施例) 次に9本発明を実施例により具体的に説明する。(Example) Next, the present invention will be specifically explained with reference to Examples.

なお、親水性の評価は、吸水性で行ったが、吸水性は、
 JIS−L−1096A法(滴下法)に準じて測定し
た。
In addition, the hydrophilicity was evaluated based on water absorption.
It was measured according to the JIS-L-1096A method (dropping method).

また、残留塩素除去能力は、試料0.5gを残留塩素濃
度2. Oppmの水11中に投入した後、オルト・ト
リジン法にて残留塩素濃度を経時的に測定して評価した
In addition, the residual chlorine removal ability is based on a sample of 0.5 g with a residual chlorine concentration of 2. After pouring into Oppm water 11, residual chlorine concentration was measured and evaluated over time using the ortho-tolidine method.

実施例1 石炭ピッチを原料とする比表面積1000m’/gの繊
維状活性炭ウェッブを、酸素を用いてガス流量35mj
2/rBin、真空度1.0Torr、 13.56M
Hzの高周波で出力0,5W/cd、処理時間2分の条
件で低温プラズマ処理し1本発明の活性炭系吸着材を得
た。
Example 1 A fibrous activated carbon web with a specific surface area of 1000 m'/g made from coal pitch was heated using oxygen at a gas flow rate of 35 mj.
2/rBin, vacuum degree 1.0 Torr, 13.56M
A low-temperature plasma treatment was carried out under the conditions of a high frequency of Hz, an output of 0.5 W/cd, and a treatment time of 2 minutes to obtain an activated carbon-based adsorbent of the present invention.

得られた本発明の活性炭系吸着材と、低温プラズマ処理
を施さない以外は実施例1と同様の繊維状活性炭ウェッ
ブ(比較例1)について、吸水性と水中における残留塩
素除去能力を測定し、その結果を第1表及び第1図に示
す。なお、第1図中。
The water absorption and residual chlorine removal ability in water were measured for the obtained activated carbon-based adsorbent of the present invention and the same fibrous activated carbon web (Comparative Example 1) as in Example 1 except that it was not subjected to low-temperature plasma treatment, The results are shown in Table 1 and Figure 1. In addition, in Figure 1.

Aは実施例、Bは比較例の残留塩素除去能力を示すもの
である。
A shows the residual chlorine removal ability of the example and B shows the residual chlorine removal ability of the comparative example.

ドウニップ(比較例2)について、吸水性と水中におけ
る残留塩素除去能力を測定し、その結果を第2表及び第
2図に示す。
The water absorbency and ability to remove residual chlorine in water of the dough nip (Comparative Example 2) were measured, and the results are shown in Table 2 and Figure 2.

第1表から明らかなように0本発明で得られた吸着材は
、吸水性が1秒以下と親水性を示し、また、第1図から
明らかなように、残留塩素除去能力も比較例より格段に
優れたものであった。
As is clear from Table 1, the adsorbent obtained in the present invention exhibits hydrophilicity with water absorption of 1 second or less, and as is clear from FIG. It was extremely good.

実施例2 石炭ピッチを原料とする比表面積1500m’/gの磯
維状活性炭と4 d x51mmのポリエステル綿を6
対4の割合で混合して作成した目付け73g/m’のカ
ードウェッブを実施例1と同一の条件で低温プラズマ処
理し1本発明の活性炭系吸着材を得た。
Example 2 6 pieces of rock fiber activated carbon with a specific surface area of 1500 m'/g made from coal pitch and polyester cotton of 4 d x 51 mm
A carded web having a basis weight of 73 g/m' prepared by mixing in a ratio of 1:4 to 4 was subjected to low-temperature plasma treatment under the same conditions as in Example 1 to obtain an activated carbon-based adsorbent of the present invention.

得られた本発明の活性炭系吸着材と、低温プラズマ処理
を施さない以外は実施例2と同様のカー実施例3 石炭ピッチを原料とする比表面積1500m”7gの繊
維状活性炭と、4dx51mmのポリエチレン綿を5m
mにカットしたものを6対4の割合で混抄して得た目付
け83g/m2のシートを、酸素を用いてガス流量35
m1/min、真空度1.0Torr、 13.56M
Hzの高周波で出力0.5W/ ci、処理時間30秒
の条件で低温プラズマ処理し1本発明の活性炭系吸着材
を得た。
The obtained activated carbon-based adsorbent of the present invention and a car similar to Example 2 except that low-temperature plasma treatment was not performed Example 3 Fibrous activated carbon with a specific surface area of 1500 m''7g made from coal pitch and polyethylene of 4dx51mm 5m of cotton
A sheet with a basis weight of 83 g/m2 obtained by mixing paper cut into 1.5 m in the ratio of 6:4 is heated to a gas flow rate of 35 g/m2 using oxygen.
m1/min, vacuum degree 1.0 Torr, 13.56M
A low-temperature plasma treatment was performed under the conditions of a high frequency of Hz, an output of 0.5 W/ci, and a treatment time of 30 seconds to obtain an activated carbon-based adsorbent of the present invention.

得られた本発明の活性炭系吸着材と、低温プラズマ処理
を施さない以外は実施例3と同様のシート(比較例3)
について、吸水性と水中における残留塩素除去能力を測
定し、その結果を第3表及び第3図に示す。
The obtained activated carbon-based adsorbent of the present invention and a sheet similar to Example 3 except that low-temperature plasma treatment was not performed (Comparative Example 3)
The water absorption and ability to remove residual chlorine in water were measured, and the results are shown in Table 3 and Figure 3.

第3表 (発明の効果) 上述したように1本発明の活性炭系吸着材は。Table 3 (Effect of the invention) As mentioned above, one of the activated carbon-based adsorbents of the present invention is:

活性炭単独又は活性炭と他の材料からなる混合物に低温
プラズマ処理が施された吸着材であるので。
This is because it is an adsorbent made of activated carbon alone or a mixture of activated carbon and other materials that has been subjected to low-temperature plasma treatment.

本発明の活性炭系吸着材を使用すれば、活性炭の欠点で
ある水中溶存物質除去時の水の浸透性の悪さが改善され
る。
By using the activated carbon-based adsorbent of the present invention, the poor permeability of water when removing substances dissolved in water, which is a drawback of activated carbon, can be improved.

したがって9本発明の吸着材を用いて水中の溶存物質を
除去する場合、処理対象溶液を流動させるか、又は吸着
材を流動させて強制的に水を吸着材に浸透させる動吸着
を行う場合は勿論のこと。
Therefore, when removing dissolved substances in water using the adsorbent of the present invention, dynamic adsorption is performed in which the solution to be treated is made to flow or the adsorbent is made to flow and water is forcibly permeated into the adsorbent. Of course.

単に吸着材を溶液中に投入又は設置するするだけのいわ
ゆる静吸着においても、溶存物質の除去能力が著しく向
上し、従来のように、溶存物質の除去能力を向上させる
ために、処理対象溶液を流動させるたり、吸着材を流動
させて強制的に水を吸着材に浸透させる動吸着を行う必
要がなくなり。
Even in so-called static adsorption, in which an adsorbent is simply placed or placed in a solution, the ability to remove dissolved substances is significantly improved. It is no longer necessary to perform dynamic adsorption, which involves fluidizing the adsorbent and forcing water to penetrate into the adsorbent.

吸着材の使用形態が制約されたり、コスト高になるとい
う問題が解消される。
This solves the problems of restrictions on how adsorbents can be used and high costs.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図、第2図及び第3図は、実施例1〜3及び比較例
1〜3の残留塩素除去能力を示すグラフであり1図中、
Aは実施例、Bは比較例を示すものである。
Figures 1, 2, and 3 are graphs showing the residual chlorine removal ability of Examples 1 to 3 and Comparative Examples 1 to 3, and in Figure 1,
A shows an example, and B shows a comparative example.

Claims (1)

【特許請求の範囲】[Claims] (1)活性炭単独又は活性炭と他の材料からなる混合物
に低温プラズマ処理が施されていることを特徴とする活
性炭系吸着材。
(1) An activated carbon-based adsorbent characterized in that activated carbon alone or a mixture of activated carbon and other materials is subjected to low-temperature plasma treatment.
JP14717889A 1989-06-09 1989-06-09 Active carbon based adsorbent Pending JPH0312233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14717889A JPH0312233A (en) 1989-06-09 1989-06-09 Active carbon based adsorbent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14717889A JPH0312233A (en) 1989-06-09 1989-06-09 Active carbon based adsorbent

Publications (1)

Publication Number Publication Date
JPH0312233A true JPH0312233A (en) 1991-01-21

Family

ID=15424347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14717889A Pending JPH0312233A (en) 1989-06-09 1989-06-09 Active carbon based adsorbent

Country Status (1)

Country Link
JP (1) JPH0312233A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736195A1 (en) * 1995-06-27 1997-01-03 Unitika Ltd ADSORBENT FOR THE ADSORPTION OF RADIOACTIVE NUCLEIDES AND ITS MANUFACTURING METHOD, AND METHOD FOR THE TREATMENT OF RADIOACTIVE WASTE TO REDUCE THE VOLUME
JP4725341B2 (en) * 2006-02-02 2011-07-13 住友電装株式会社 Junction box for vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736195A1 (en) * 1995-06-27 1997-01-03 Unitika Ltd ADSORBENT FOR THE ADSORPTION OF RADIOACTIVE NUCLEIDES AND ITS MANUFACTURING METHOD, AND METHOD FOR THE TREATMENT OF RADIOACTIVE WASTE TO REDUCE THE VOLUME
JP4725341B2 (en) * 2006-02-02 2011-07-13 住友電装株式会社 Junction box for vehicles

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