JPH06104196B2 - Method for producing heavy metal ion scavenger - Google Patents
Method for producing heavy metal ion scavengerInfo
- Publication number
- JPH06104196B2 JPH06104196B2 JP2310738A JP31073890A JPH06104196B2 JP H06104196 B2 JPH06104196 B2 JP H06104196B2 JP 2310738 A JP2310738 A JP 2310738A JP 31073890 A JP31073890 A JP 31073890A JP H06104196 B2 JPH06104196 B2 JP H06104196B2
- Authority
- JP
- Japan
- Prior art keywords
- heavy metal
- metal ion
- carbon dioxide
- dioxide gas
- ion scavenger
- 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 - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は溶液中に存在する重金属イオンを完全に捕集す
ることができる重金属イオン捕集剤の製造方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method for producing a heavy metal ion scavenger capable of completely trapping heavy metal ions present in a solution.
〈従来の技術〉 イオン交換体は、分析化学用，特定イオンの抽出あるい
は重金属イオンの除去などに重要な物質である。<Prior Art> Ion exchangers are important substances for analytical chemistry, extraction of specific ions or removal of heavy metal ions.
有機イオン交換体に比べ、無機イオン交換体は耐熱性，
高選択性の他、放射線に対する安定性から放射性溶液の
処理などに注目されている。Compared to organic ion exchangers, inorganic ion exchangers have higher heat resistance,
In addition to high selectivity, attention has been paid to treatment of radioactive solutions because of its stability against radiation.
しかしいまだその性能を十分に発揮するまでには至って
いないのが現状である。However, the reality is that the performance has not yet been fully demonstrated.
〈発明が解決しようとする課題〉 本発明は、上記現状に鑑み溶液中に重金属イオンを完全
に捕集できる重金属イオン捕集剤の製造方法を提供する
ことを目的とするものである。<Problems to be Solved by the Invention> The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for producing a heavy metal ion scavenger capable of completely collecting heavy metal ions in a solution.
〈課題を解決する為の手段〉 上記本発明の目的は次の如き手段を採用することにより
達成できる。即ち、その要旨は、シリカ原料と石灰原料
をCa/Siモル比で0.4〜1.4の範囲で混合したものを、オ
ートクレーブを用いて水熱反応させ、次いでこの反応生
成物に炭酸ガスを吹込む重金属捕集剤の製造方法であ
る。<Means for Solving the Problems> The object of the present invention can be achieved by adopting the following means. That is, the gist is that a mixture of a silica raw material and a lime raw material in a Ca / Si molar ratio of 0.4 to 1.4 is hydrothermally reacted using an autoclave, and then carbon dioxide is blown into the reaction product to produce a heavy metal. It is a method for producing a scavenger.
ここでシリカ原料しては、石英，フライアッシュ，もみ
がら灰等種々のシリカ含有物が使用できAlを含んでいて
もかまわない。又石灰原料としては生石灰，消石灰，石
灰石等がある。Here, various silica-containing materials such as quartz, fly ash, and chaff ash can be used as the silica raw material, and Al may be contained. The lime raw materials include quick lime, slaked lime and limestone.
そして、シリカ原料と石灰原料との混合物のCa/Siモル
比を0.4〜1.4とするのは、0.4未満ではケイ酸カルシウ
ム水和物が十分に生成されず、未反応のシリカ原料が残
存し、一方1.4を越えると未反応の石灰原料が残存し、
次に炭酸ガスを吹込んだ時に残存石灰が大きなカルサイ
ト結晶に成長するためにイオン交換反応を阻害する。And, the Ca / Si molar ratio of the mixture of the silica raw material and the lime raw material is 0.4 to 1.4, calcium silicate hydrate is not sufficiently generated in less than 0.4, unreacted silica raw material remains, On the other hand, if it exceeds 1.4, unreacted lime raw material remains,
Next, when carbon dioxide gas is blown in, residual lime grows into large calcite crystals, which hinders the ion exchange reaction.
オートクレーブに於ける反応は、高温にする程圧力も高
くなり反応速度は大となるが、本発明の場合220℃以下
で十分であり、反応時間も最長で24時間あれば十分であ
る。Regarding the reaction in the autoclave, the higher the temperature, the higher the pressure and the reaction rate, but in the present invention, 220 ° C. or lower is sufficient, and the reaction time of 24 hours at the longest is sufficient.
オートクレーブでの水熱反応の生成物であるケイ酸カル
シウム水和物への炭酸ガスの吹込みは、水熱反応直後で
もよいが、高温で水熱反応を行うために、炭酸ガスが高
温水への溶解度が小なるため反応生成物へ炭酸ガスが取
り込まれ難い。従ってオートクレーブを冷却した後に炭
酸ガスを吹込むのが短時間で反応を生成物へ炭酸ガスが
取り込まれるので好ましい。又この炭酸ガスの吹込み
は、高圧にする程反応生成物たるケイ酸カルシウム水和
物へ取り込まれる炭酸ガスは大となるが、その圧力は4k
g/cm2程度で十分で吹込み時間は最低８時間あれば十分
であり、炭酸ガス流速は最大で400ml/min.で十分であ
る。Carbon dioxide gas may be blown into calcium silicate hydrate, which is a product of hydrothermal reaction in an autoclave, immediately after the hydrothermal reaction. Carbon dioxide gas is difficult to be taken into the reaction product because the solubility of is small. Therefore, it is preferable to blow carbon dioxide gas after cooling the autoclave because carbon dioxide gas is taken into the reaction product in a short time. In addition, the higher the pressure of carbon dioxide gas is, the greater the amount of carbon dioxide gas taken into the reaction product, calcium silicate hydrate, becomes, but the pressure is 4k.
About g / cm 2 is sufficient, a blowing time of at least 8 hours is sufficient, and a carbon dioxide gas flow rate of 400 ml / min. is sufficient.
〈実施例〉 以下本発明をその実施例および比較例を参酌し乍ら詳述
する。<Example> The present invention will be described in detail below with reference to Examples and Comparative Examples.
実施例１ この実施例１は、シリカ原料と石灰原料をCa/Siモル比
で0.6に調整した混合粉末に対し、重量比で20倍相当の
水を加えて混合，攪拌したスラリーを180℃で12時間オ
ートクレーブ中で攪拌し乍ら水熱反応を行い、ケイ酸カ
ルシウム水和物スラリーを得た。該ケイ酸カルシウム水
和物スラリーをオートクレーブごと冷却した後、再び攪
拌し乍ら炭酸ガスを、圧力4kg/cm2，流量100ml/min,で
４時間吹込み重金属イオン捕集剤を得た。Example 1 In this example 1, a silica raw material and a lime raw material were mixed at a Ca / Si molar ratio of 0.6 and mixed with water at a weight ratio of 20 times to a mixed powder. Hydrothermal reaction was performed while stirring in an autoclave for 12 hours to obtain a calcium silicate hydrate slurry. The calcium silicate hydrate slurry was cooled together with the autoclave and then stirred again to blow carbon dioxide gas at a pressure of 4 kg / cm 2 and a flow rate of 100 ml / min for 4 hours to obtain a heavy metal ion scavenger.
このようにして得られた重金属イオン捕集剤は、ケイ酸
カルシウム水和物に対して53％の炭酸ガスを取り込んで
いるが、ケイ酸カルシウム水和物中のCaOと結合してお
らず、ただケイ酸カルシウム水和物中へ取り込まれてい
る物であった。The heavy metal ion scavenger thus obtained incorporates 53% of carbon dioxide gas relative to calcium silicate hydrate, but does not bind to CaO in calcium silicate hydrate, However, it was a substance incorporated into calcium silicate hydrate.
実施例２ この実施例２は、上記実施例１と同様にして得たケイ酸
カルシウム水和物に、炭酸ガスを圧力4kg/cm2，流量100
ml/min.で８時間吹込み重金属イオン捕集剤を得た。Example 2 In this Example 2, the calcium silicate hydrate obtained in the same manner as in Example 1 above was treated with carbon dioxide gas at a pressure of 4 kg / cm 2 and a flow rate of 100.
Blowing at 8 ml / min. for 8 hours gave a heavy metal ion scavenger.
このようにして得られた重金属イオン捕集剤は、ケイ酸
カルシウム水和物に対して96％の炭酸ガスを取り込んで
おり、このケイ酸カルシウム水和物中のCaOと結合して
カルサイトの結晶が生成している物であった。The heavy metal ion scavenger thus obtained takes up 96% of carbon dioxide gas with respect to calcium silicate hydrate, and binds with CaO in this calcium silicate hydrate to form calcite. It was a product in which crystals were formed.
以上の実施例によって得られた無機イオン交換体と、炭
酸ガスを吹込んでいないケイ酸カルシウム水和物につい
ての重金属イオン捕集実験結果を以下に示す。The results of an experiment for collecting heavy metal ions of the inorganic ion exchanger obtained by the above examples and calcium silicate hydrate in which carbon dioxide gas is not blown are shown below.
この実験は、重金属イオン剤として、Hg(NO3)2Cd(N
O3)2，Cr(NO3)3を用い、重金属イオン濃度Hg2+，Cd2+，
Cr3+は下記各表に示す値とし、各重金属イオン溶液200m
lに、試料1,5及び６を各0.2gずつ入れ、バッチ法で行っ
た。In this experiment, Hg (NO 3 ) 2 Cd (N
O 3 ) 2 and Cr (NO 3 ) 3 are used for heavy metal ion concentration Hg 2+ , Cd 2+ ,
Cr 3+ is the value shown in each table below, each heavy metal ion solution 200m
0.2 g of each of Samples 1, 5 and 6 was placed in 1 and the batch method was used.
なお試料１は比較例１としての炭酸化していないケイ酸
カルシウム水和物、試料５及び６はそれぞれ上記実施例
１及び２で得られた製品である。Sample 1 is the uncarbonated calcium silicate hydrate as Comparative Example 1, and Samples 5 and 6 are the products obtained in Examples 1 and 2, respectively.
又イオン捕集温度は30℃で、24時間後に溶液を採取し、
原子吸光光度法によって各重金属イオン濃度を定量し
た。The ion collection temperature is 30 ° C, and the solution is sampled after 24 hours.
Each heavy metal ion concentration was quantified by atomic absorption spectrophotometry.
その結果としての試料1g当りのイオン捕集量を下記第１
表〜第３表に示す。As a result, the amount of collected ions per 1 g of sample is
It shows in Table-3.
〈発明の効果〉 以上の実験結果で判るように、本発明方法によって得ら
れた製品は幅広い濃度に於いて重金属の捕集力が大であ
るという効果がある。 <Effect of the Invention> As can be seen from the above experimental results, the product obtained by the method of the present invention has an effect that the heavy metal collecting power is large in a wide range of concentrations.
Claims (1)
0.4〜1.4の範囲で混合したものを、オートクレーブを用
いて水熱反応させ、次いでこの反応生成物に炭酸ガスを
吹込むことを特徴とする重金属イオン捕集剤の製造方
法。1. A silica raw material and a lime raw material in a Ca / Si molar ratio.
A method for producing a heavy metal ion scavenger, which comprises hydrothermally reacting a mixture in a range of 0.4 to 1.4 using an autoclave, and then blowing carbon dioxide gas into the reaction product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2310738A JPH06104196B2 (en) | 1990-11-15 | 1990-11-15 | Method for producing heavy metal ion scavenger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2310738A JPH06104196B2 (en) | 1990-11-15 | 1990-11-15 | Method for producing heavy metal ion scavenger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04180831A JPH04180831A (en) | 1992-06-29 |
| JPH06104196B2 true JPH06104196B2 (en) | 1994-12-21 |
Family
ID=18008896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2310738A Expired - Lifetime JPH06104196B2 (en) | 1990-11-15 | 1990-11-15 | Method for producing heavy metal ion scavenger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06104196B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7061016B2 (en) | 1992-12-09 | 2006-06-13 | Semiconductor Energy Laboratory Co., Ltd. | Electronic circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4993990B2 (en) * | 2006-09-29 | 2012-08-08 | バブコック日立株式会社 | Exhaust gas treatment apparatus and exhaust gas treatment method |
-
1990
- 1990-11-15 JP JP2310738A patent/JPH06104196B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7061016B2 (en) | 1992-12-09 | 2006-06-13 | Semiconductor Energy Laboratory Co., Ltd. | Electronic circuit |
| US7547916B2 (en) | 1992-12-09 | 2009-06-16 | Semiconductor Energy Laboratory Co., Ltd. | Electronic circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04180831A (en) | 1992-06-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |