作为水文地质研究中的痕迹剂的短寿命天然放射性核酸 - - 综述
Michael Schubert1, Mang Lin2, Jordan F Clark3
1Helmholtz Centre for Environmental Research GmbH - UFZ, Department Catchment Hydrology, Permoserstr. 15, 04318 Leipzig, Germany.
The Science of the total environment
|February 11, 2024
概括
这项研究比较了传统的标记物,如稳定同位素和CFC,与较少使用的宇宙性放射性同位素 (硫-35,-7,-32/33,,,,) 进行地下水研究. 这些短寿命同位素为地下水脆弱性和排放动态提供了独特的见解.
科学领域:
- 水文地质学 水文地质学
- 环境地质化学环境地质化学
- 放射化学 放射化学是指辐射化学.
背景情况:
- 地下水研究通常使用稳定的同位素 (δ 18O, δ 2H),放射性碳 (14C), (3H) 和人为气体 (CFC, SF6) 来追踪流动路径,停留时间和污染源.
- 稳定同位素对于区域流系统和地下水/地表水相互作用是有效的,而过渡性标记物适合现代流系统.
- 虽然使用率较低,但宇宙性基短寿命放射性同位素对于研究短时间地下水动态,水层脆弱性和地下水排放有价值.
研究的目的:
- 为了比较各种放射性同位素和人为化合物作为地下水标记物的应用.
- 突出在水文地质研究中未充分利用的宇宙性和原性短寿命放射性同位素的潜力.
- 为这些标记物提供有关采样技术和分析方法的见解.
主要方法:
- 已确定的地下水标记物的审查和比较:水的稳定同位素,放射性碳,和人为气体 (CFC,SF6).
- 详细讨论了宇宙性安道基短寿命放射性同位素:放射性硫 (35S),放射性 (7Be),放射性 (32/33P),三 (3H), (222Rn) 和短寿命 (224/223Ra).
- 专注于每个同位素的追踪器输入功能,采样策略和分析方法.
主要成果:
- 已建立的追踪器有效地划分了各种时间尺度上的流动路径,停留时间和污染源.
- 短寿命的宇宙原性和原性放射性同位素 (例如,7Be,35S,32/33P,222Rn,224/223Ra) 显示出独特的适合性,用于高分辨率研究水下层脆弱性和地下水-地表水相互作用.
- 案例研究说明了各种标记物的联合应用,强调了短寿命放射性同位素的低估效用.
结论:
- 宇宙性安道基短寿命放射性同位素为详细的地下水调查提供了强大的,但尚未充分利用的工具,特别是用于短时间和脆弱性评估.
- 使用传统和新型标记物的综合方法,可以更全面地了解复杂的地下水系统.
- 鼓励对这些放射性同位素进行进一步的研究和应用,以充分利用它们在水文地质学中的潜力.
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