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南方衍生的-129侵入西藏的途径,由其空间分布揭示出来

Yukun Fan¹, Peng Cheng², Jie Zhou³

¹Xi'an AMS Center, State Key Laboratory of Loess and Quaternary Geology, Shaanxi Key Laboratory of AMS Technology and Application, Institute of Earth Environment, CAS, Xi'an 710061, China.

Journal of hazardous materials

|February 14, 2025

概括

来自印度的放射性-129 (129I) 已经通过季风到达西藏高原. 虽然并不是直接的风险,但需要持续监测潜在的长期生态影响.

科学领域:

环境科学环境科学
放射化学放射化学是指辐射化学.
大气科学大气科学

背景情况:

西藏高原的生态稳定对区域和全球气候至关重要.
放射性污染物对高原的环境构成潜在威胁.
来自印度核活动的-129 (129I) 是大气污染物运输的潜在标记物.

研究的目的:

调查-129 (129I) 在西藏中南部的分布和途径.
评估129I在西藏高原的潜在辐射风险和环境影响.
了解大气吸收在植物中的作用.

主要方法:

在西藏中南部土壤和植物样本中分析129I度和129I/127I比率.
对同位素分布与高度和降雨等环境因素的相关性分析.
污染物运输路径的建模,包括Yarlung Tsangpo大峡谷.

主要成果:

在西藏东南部发现了较高的129I度和129I/127I比率.
在同位素和环境因素之间观察到强烈的相关性.
有证据表明,气体129I通过印度夏季季风通过Yarlung Tsangpo大峡谷运输.
植物中129I/127I比率的升高表明大气中的吸收.

结论:

来自南亚的气体129I排放被印度夏季季风带到西藏高原.
雅鲁伦特桑普大峡谷是129I运输的主要通道.
目前的129I水平不构成直接的放射性风险,但由于生物积累潜力,长期监测至关重要.

关键词:

-129是一种.核活动核活动路径路径路径路径路径放射性污染物是一种放射性污染物.西藏高原是西藏的高原.

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