Immobilizated Technique of Harmful Metallic Element by Crystalline Ziroconium Phosphate

结晶磷酸锆固定有害金属元素技术

• 批准号: 14380281
• 负责人: NAKAYAMA Susumu
• 金额: $ 8.38万
• 依托单位: Niihama National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14380281/
• 关键词: Zirconium Phosphate; Waste Incinerated Ashe; Harmful Metallic Element; Immobilization; Leaching Property; Ceramics; Three Dimensional Network Structure; Autoclave; 有害重金属; 浸出特性; 水熱合成

MIXTURES OF HZr_2(PO_4)_3 WITH THE SOLUTION OF METALLIC ELEMENT ( Mn, Cu, Zn, Cd AND Pb) WERE TREATED AT 250°C 24 HOURS IN AN AUTOCLAVE, IN ORDER TO INVESTIGATE THE IMMOBILIZATION OF HARMFUL METALLIC ELEMENTS. THE IMMOBILIZED RATE INCREASED WITH AN INCREASE OF IONIC RADIUS OF THE IMMOBILIZED METALLIC ELEMENT. THE HARMFUL METALLIC ELEMENT LEACHING RATES OF IMMOBILIZED PRODUCTS IN DEIONIZED WATER AND 1 mol-dm^<-3> -HC1 AT 160°C < 10^<-6> gm^<-2> d^<-1> AND < 10^<-4> gm^<-2> d^<-1>. FURTHERMORE, THE APPLICATION OF THE PRESENT METHOD WAS TRIED FOR THE IMMOBILIZATION OF Cs, Sr AND RARE-EARTH ELEMENTS WHICH ARE THE RADIOACTIVE WASTES AND ARE DIFFICULT TO IMMOBILIZE BY THE CONVENTIONAL TECHNIQUES, AND FOR THE IMMOBILIZATION OF OTHER ELEMENTS KNOWN AS THE SOURCES OF AN ENVIRONMENTAL POLLUTION. PRELIMINARY EXPERIMENTS REVEALED THAT THESE ELEMENTS WERE EFFICIENTLY IMMOBILIZED IN HZr_2(PO_4)_3.

在250 ℃高压釜中，将HZr_2（PO_4）_3与金属元素（Mn，Cu，Zn，Cd，Pb）的溶液混合24小时，以防止有害金属元素的固定。固定化速率随固定化金属元素离子半径的增大而增大。160°C下去离子水和1 mol-dm^ -HC 1中固定化产品的有害金属元素浸出率<-3>&lt; 10^<-6>gm^<-2>d^<-1>和&lt; 10^<-4>gm^<-2>d^<-1>。此外，还将本方法应用于常规技术难以固定的放射性废物Cs、Sr和稀土元素的固定化，以及其它已知的环境污染源元素的固定化。初步实验表明，HZr_2（PO_4）_3能有效地固定这些元素。

项目成果

K.Itoh, S.Nakayama: "Immobilization of cesium by crystalline zirconium phosphate"Journal of Materials Science. 37. 1701-1704 (2002)

K.Itoh、S.Nakayama：“通过结晶磷酸锆固定铯”材料科学杂志。

S.Nakayama, K.Itoh: "Immobilization technique of cesium to HZr_2(PO_4)_3 using an autoclave"Journal of Nuclear Science and Technology. 40. 631-633 (2003)

S.Nakayama、K.Itoh：“使用高压釜将铯固定到 HZr_2(PO_4)_3”核科学技术杂志。

中田寛子, 影山達也, 伊藤克彦, 中山享: "HZr_2(PO_4)_3によって固定化されたアルカリ及びアルカリ土類金属元素の浸出特性"Journal of the Ceramic Society of Japan. 111(印刷中). (2003)

Hiroko Nakata、Tatsuya Kageyama、Katsuhiko Ito、Satoru Nakayama：“HZr_2(PO_4)_3 固定的碱金属和碱土金属元素的浸出特性”日本陶瓷学会杂志 111（出版中）。

S.Nakayama, K.Itoh: "Immobilization of strontium by crystalline zirconium phosphate"Journal of the European Ceramic Society. 23. 1047-1052 (2003)

S.Nakayama、K.Itoh：“通过结晶磷酸锆固定锶”欧洲陶瓷学会杂志。

K.ITO.H, S.NAKAYAMA: "IMMOBILIZATION OF CESIUM ZIRCONIUM PHOSPHATE BY CRYSTALLINE ZIRCONIUM PHOSPHATE"JOURNAL OF MATERIALS SCIENCE LETTERS. 37. 1701-1704 (2002)

K.ITO.H、S.NAKAYAMA：“通过结晶磷酸锆固定磷酸铯锆”材料科学快报杂志。