JPH0141396B2 - - Google Patents
Info
- Publication number
- JPH0141396B2 JPH0141396B2 JP9190282A JP9190282A JPH0141396B2 JP H0141396 B2 JPH0141396 B2 JP H0141396B2 JP 9190282 A JP9190282 A JP 9190282A JP 9190282 A JP9190282 A JP 9190282A JP H0141396 B2 JPH0141396 B2 JP H0141396B2
- Authority
- JP
- Japan
- Prior art keywords
- ion exchange
- water
- temperature
- exchange resin
- treated
- 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.)
- Expired
Links
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
Description
【発明の詳細な説明】
この発明は、重金属およびキレート剤を含む水
のイオン交換方法に関する。DETAILED DESCRIPTION OF THE INVENTION This invention relates to a process for ion exchange of water containing heavy metals and chelating agents.
金属表面処理排水やボイラの化学洗浄排水等に
は、溶出した金属、キレート剤および金属とキレ
ート剤との錯体が含まれており、これらの排水は
イオン交換樹脂で脱塩処理され、処理水は回収し
て再使用されるか、河川や海に放流されている。 Metal surface treatment wastewater and boiler chemical cleaning wastewater contain eluted metals, chelating agents, and complexes of metals and chelating agents.These wastewaters are desalinated using ion exchange resins, and the treated water is They are either collected and reused or discharged into rivers or the ocean.
イオン交換樹脂は、通常、再生して繰り返し使
用されるけれども、原子力発電所における発電プ
ラントの化学洗浄排水の処理に使用されたものは
放射能で汚染されるため、再生せずに使い捨てと
なる。 Ion exchange resins are usually recycled and used repeatedly, but those used in the treatment of chemical cleaning wastewater from nuclear power plants are contaminated with radioactivity and are therefore disposable without being recycled.
従来、常温でイオン交換樹脂を充填したイオン
交換装置により重金属およびキレート剤を含む水
を処理していたが、イオン交換装置の貫流交換容
量（以下B.T.C.と略記する。）が小さく、イオン
交換樹脂が有効に利用されていなかつた。 Conventionally, water containing heavy metals and chelating agents has been treated using ion exchange equipment filled with ion exchange resin at room temperature, but the flow-through exchange capacity (hereinafter abbreviated as BTC) of the ion exchange equipment is small, and the ion exchange resin is It was not being used effectively.
本発明は、このような現状において、B.T.C.
を増大させることのできるイオン交換方法を提供
することを目的とするものである。 In this current situation, the present invention aims to solve the problem of BTC
The object of the present invention is to provide an ion exchange method that can increase the
すなわち、本発明は、重金属およびキレート剤
を含む被処理水をイオン交換装置によりイオン交
換するに際し、被処理水を50〜70℃に温度調節す
ることを特徴とする重金属およびキレート剤を含
む水のイオン交換方法である。重金属およびキレ
ート剤を含む被処理水をイオン交換装置に通すと
重金属はカチオン交換樹脂に吸着され、重金属と
キレート剤との錯体はアニオン交換樹脂に吸着さ
れ、遊離のキレート剤があればこれもアニオン交
換樹脂に吸着される。重金属としては鉄、コバル
ト、ニツケル、銅などが挙げられ、キレート剤と
してはEDTA、NTAのようなアミノポリカルボ
ン酸、クエン酸、シユウ酸のようなポリカルボン
酸などが挙げられる。 That is, the present invention provides a method for treating water containing heavy metals and a chelating agent, which is characterized in that when the water to be treated containing heavy metals and a chelating agent is subjected to ion exchange using an ion exchange device, the temperature of the water to be treated is adjusted to 50 to 70°C. This is an ion exchange method. When treated water containing heavy metals and chelating agents is passed through an ion exchange device, the heavy metals are adsorbed by the cation exchange resin, and complexes of heavy metals and chelating agents are adsorbed by the anion exchange resin, and if there is a free chelating agent, this also becomes anion. Adsorbed by exchange resin. Heavy metals include iron, cobalt, nickel, copper, etc., and chelating agents include aminopolycarboxylic acids such as EDTA and NTA, and polycarboxylic acids such as citric acid and oxalic acid.
被処理水を50〜70℃に温度調節するという極く
簡単な操作ののち、イオン交換を行うと、イオン
交換樹脂のB.T.C.を増大させることができるが、
被処理水の温度が50℃より低いと、B.T.C.を増
大させることができず、また70℃を越え、例えば
80℃以上にすると、処理水の水質が低下し、所定
の純度が得られないので好ましくない。 The BTC of the ion exchange resin can be increased by performing ion exchange after a very simple operation of adjusting the temperature of the water to be treated to 50 to 70°C.
If the temperature of the water to be treated is lower than 50℃, BTC cannot be increased, and if it exceeds 70℃, e.g.
If the temperature is higher than 80°C, the quality of the treated water will deteriorate and the desired purity will not be obtained, which is not preferable.
温度調節は、被処理水を熱交換器により加熱ま
たは冷却するなど公知の手段により行うことがで
きる。 Temperature adjustment can be performed by known means such as heating or cooling the water to be treated using a heat exchanger.
イオン交換装置としては、カチオン交換樹脂を
充填したカチオン交換塔とアニオン交換樹脂を充
填したアニオン交換塔とをこの順に通液する二塔
式やアニオン交換樹脂とカチオン交換樹脂とを混
合状態で充填した混床式など任意のものが採用で
きるが、混床式を採用するとPH変化が少なく不溶
性の金属水酸化物の生成する虞れがなく好まし
い。イオン交換樹脂としては、アニオン交換樹脂
として強塩基性または弱塩基性アニオン交換樹
脂、カチオン交換樹脂として強酸性または弱酸性
カチオン交換樹脂のすべてのタイプが使用でき
る。 The ion exchange device can be a two-column type in which a cation exchange column filled with a cation exchange resin and an anion exchange column filled with an anion exchange resin are passed in this order, or a two column type in which the anion exchange column and an anion exchange column filled with an anion exchange resin are filled in a mixed state. Although any method such as a mixed bed type can be used, it is preferable to use a mixed bed type because there is little PH change and there is no possibility of generation of insoluble metal hydroxides. All types of ion exchange resins can be used, including strongly basic or weakly basic anion exchange resins as anion exchange resins and strongly acidic or weakly acidic cation exchange resins as cation exchange resins.
本発明法が、常温の従来法よりもB.T.C.が増
大する理由は定かではないが、おそらく次のとお
りであると思われる。 The reason why the method of the present invention increases BTC more than the conventional method at room temperature is not clear, but it is probably as follows.
常温の従来法では、金属とキレート剤との錯体
をアニオン交換樹脂で吸着する反応において、フ
リーの水酸基が錯体中の金属と反応して不溶性の
金属水酸化物が生成し、これがイオン交換樹脂表
面に付着し、イオン交換反応を阻むため、B.T.
C.が小さくなるが、高温の本発明法では、析出し
た金属水酸化物と新らしいキレート剤との反応に
より、生成された金属錯体の再キレート化の速度
が速いため金属水酸化物によるイオン交換反応の
阻害が少ない。そのためB.T.C.が大きくなる。 In the conventional method at room temperature, in the reaction in which a complex of a metal and a chelating agent is adsorbed by an anion exchange resin, free hydroxyl groups react with the metal in the complex to form an insoluble metal hydroxide, which is absorbed onto the surface of the ion exchange resin. BT adheres to the ion exchange reaction and prevents the ion exchange reaction.
However, in the high-temperature method of the present invention, the reaction between the precipitated metal hydroxide and the new chelating agent results in a fast rechelation rate of the metal complex, so the ions caused by the metal hydroxide Less inhibition of exchange reaction. Therefore, BTC becomes larger.
本発明によれば、B.T.C.が大きくなるので従
来法に比らべイオン交換装置を小型化することが
できる。また、使用済のイオン交換樹脂を廃棄す
る場合は、その廃棄物量を少なくすることができ
る。 According to the present invention, since the BTC becomes large, the ion exchange device can be made smaller compared to the conventional method. Furthermore, when disposing of used ion exchange resin, the amount of waste can be reduced.
実施例
内径25mm、高さ1000mmのカラムにＨ形カチオン
交換樹脂ダイヤイオンSKN−１（三菱化成工業株
式会社商標）の220mlとOH形アニオン交換樹脂
ダイヤイオンSAN−１の180mlとを混合して充填
し、これに50〜70℃に温度調整した原水を空間速
度12.5hr-1で通液した。原水はエチレンジアミン
四酢酸を1000mg／、第二鉄イオンを130mg／、
アンモニアを200mg／含有するボイラの化学洗
浄排液を用いた。温度調整は、60〜80℃に調整し
た恒温水槽中に浸漬したガラス製舵管中に原水を
通すことにより行い、カラム出口の液温が50℃〜
60℃になるようにした。通液後、B.T.C.を測定
したところ、アニオン交換樹脂１当りのB.T.
C.は炭酸カルシウム換算で、カラム出口の液温を
50℃に調整した場合は47ｇ、60℃の場合（カラム
内最高温度は67℃）は53ｇであつた。なお、比較
のため原水を常温（20℃）で通液した場合のB.
T.C.は24ｇ−CaCO3／−アニオン樹脂であつ
た。Example A column with an inner diameter of 25 mm and a height of 1000 mm was filled with a mixture of 220 ml of H-type cation exchange resin Diaion SKN-1 (trademark of Mitsubishi Chemical Industries, Ltd.) and 180 ml of OH-type anion exchange resin Diaion SAN-1. Then, raw water whose temperature was adjusted to 50 to 70°C was passed through this at a space velocity of 12.5 hr -1 . The raw water contains 1000 mg of ethylenediaminetetraacetic acid, 130 mg of ferric ion,
Chemical cleaning effluent from a boiler containing 200 mg of ammonia was used. Temperature adjustment is performed by passing raw water through a glass rudder tube immersed in a constant temperature water bath adjusted to 60 to 80°C, and the liquid temperature at the column outlet is 50°C to 80°C.
The temperature was set to 60℃. After passing through the liquid, BTC was measured and it was found that BT per anion exchange resin
C. is the liquid temperature at the column outlet in terms of calcium carbonate.
The amount was 47 g when the temperature was adjusted to 50°C, and 53 g when the temperature was adjusted to 60°C (the maximum temperature inside the column was 67°C). For comparison, B. when raw water is passed through at room temperature (20℃).
TC was 24 g CaCO 3 /-anion resin.
処理水の水質は、いずれの場合も、導電率は
0.07μS／cmであつた。 In both cases, the quality of the treated water is such that the conductivity is
It was 0.07μS/cm.
Claims (1)
オン交換装置によりイオン交換するに際し、被処
理水を50〜70℃に温度調整することを特徴とする
重金属およびキレート剤を含む水のイオン交換方
法。 ２ イオン交換装置はアニオン交換樹脂とカチオ
ン交換樹脂とが混合状態で充填されている混床塔
である特許請求の範囲第１項記載のイオン交換方
法。[Scope of Claims] 1. Water containing heavy metals and a chelating agent, characterized in that when the water to be treated containing heavy metals and a chelating agent is subjected to ion exchange using an ion exchange device, the temperature of the water to be treated is adjusted to 50 to 70°C. ion exchange method. 2. The ion exchange method according to claim 1, wherein the ion exchange device is a mixed bed column filled with an anion exchange resin and a cation exchange resin in a mixed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190282A JPS58216775A (en) | 1982-05-28 | 1982-05-28 | Ion exchange method for water containing heavy metals and chelating agents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9190282A JPS58216775A (en) | 1982-05-28 | 1982-05-28 | Ion exchange method for water containing heavy metals and chelating agents |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58216775A JPS58216775A (en) | 1983-12-16 |
| JPH0141396B2 true JPH0141396B2 (en) | 1989-09-05 |
Family
ID=14039498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9190282A Granted JPS58216775A (en) | 1982-05-28 | 1982-05-28 | Ion exchange method for water containing heavy metals and chelating agents |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58216775A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4770788A (en) * | 1985-04-25 | 1988-09-13 | Kollmorgen Technologies Corp. | Process for removing metal complexes from waste solutions |
| US4789475A (en) * | 1987-06-23 | 1988-12-06 | Environmental Concerns, Inc. | Water purification material, process therefor, and device for the removal of heavy metal toxins |
| JP4294253B2 (en) * | 2002-03-18 | 2009-07-08 | オルガノ株式会社 | Method for removing anionic metal complex |
| EP2100666A4 (en) | 2006-12-04 | 2013-03-27 | Nomura Micro Science Kk | PROCESS FOR PURIFYING A CHEMICAL ADDITIONED WITH A CHELATING AGENT |
| WO2010124354A1 (en) * | 2009-04-27 | 2010-11-04 | Watts Water Quality And Conditioning Products, Inc. | Resin for precipitation of minerals and salts. methods of manufacture and uses thereof |
-
1982
- 1982-05-28 JP JP9190282A patent/JPS58216775A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58216775A (en) | 1983-12-16 |
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