Mechanism of Tritium Gas Oxidation in the Environment

环境中氚气氧化机理

• 批准号: 06680474
• 负责人: ICHIMASA Michiko
• 金额: $ 1.15万
• 依托单位: IBARAKI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06680474/
• 关键词: Tritium; Tritium gas; Soil Bacteria; airborne bacteria; 空中菌; トリチウムガス; 水素酸化; ヒドロゲナーゼ

To determine what actually convert HT to tritiated water in the environment, soil and airborne bacteria were isolated from the soils and air in the test plots Chalk River Laboratories in Canada and the isolated strains were screened for HT oxidation activity. The number of HT-oxidizing bacteria isolated from soils was highest in the surface soils and the occurrence rates of HT-oxidizing bacteria in the soils different in depth were comparable with HT oxidation activity in the soils. These results indicated that these HT oxidizing bacteria play a dominant role in HT oxidation in soil. The occurrence rates of HT-oxidizing airborne bacteria were 2-4 %. The identification of some of HT-oxidizing soil and airborne bacteria was conducted and most of them were actinomycesas well as HT oxidizing soil bacteria. Isolation and identification of HT oxidizing bacteria from a moss and pine roots also conducted.

为了确定在环境中是什么将HT转化为氚化水，在加拿大Chalk River实验室的试验田中，从土壤和空气中分离出土壤和空气细菌，并对分离出的菌株进行HT氧化活性筛选。HT-氧化细菌的数量以表层土壤最多，不同深度土壤中HT-氧化细菌的出现率与土壤中HT氧化活性相当。这些结果表明，这些HT氧化细菌在土壤HT氧化中起主导作用。空气中HT-氧化细菌的检出率为2- 4%。对部分HT氧化土壤和空气中的细菌进行了鉴定，其中绝大多数为放线菌和HT氧化土壤细菌。从苔藓和松树根中分离并鉴定了HT氧化细菌。

项目成果

Ichimasa, et al.: "In vitro Determination of Age Dependence of Oxidation of Tritium Gas in Rats." Radiat. Proto. Dosim.53. 339-342 (1994)

Ichimasa 等人：“体外测定大鼠氚气氧化的年龄依赖性”。

Ichimasa, et al.: "Suppression of Tritium Gas Oxidation in Rat by Norfloxacin and Clindamycin." Int. J. Radiat. Biol.67. 481-485 (1995)

Ichimasa 等人：“诺氟沙星和克林霉素对大鼠体内氚气氧化的抑制”。

Davis, et al.: "Overview of the 1994 Chronic HT Release Experiment at Chalk River." Fusion Technol.28. 840-845 (1995)

Davis 等人：“1994 年 Chalk River 慢性 HT 释放实验概述”。

Y. Ichimaswa, et al.: "In vitro determination of HT oxidation activity and tritium concentration in soil and vegetation during the chronic HT release experiment at Chalk River" Fusion Technology. 28. 877-882 (1995)

Y. Ichimaswa 等人：“Chalk River 长期 HT 释放实验期间土壤和植被中 HT 氧化活性和氚浓度的体外测定”融合技术。

H. Amano, et al.: "Formation of organically bound tritium in plants during the 1994 chronic HT release experiment at Chalk River" Fusion Technology. 28. 803-808 (1995)

H. Amano 等人：“1994 年乔克河长期高温释放实验期间植物中有机结合氚的形成”融合技术。