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一种改进的方法用于酸氧同位素在水中的分析,使用含的树脂丰富

Shaobo Yu^1,2, Cen Meng^1,3, Liren Liao^1,2

¹CAS key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Changsha 410125, China.

Water science and technology : a journal of the International Association on Water Pollution Research

|July 31, 2025

概括

一种新的加载树脂方法 (ZR-ISEEP) 简化了氧同位素 (δ18Op) 分析,用于追踪水中的污染. 这种方法克服了采样和加工方面的挑战,为环境监测提供了更有效的方法.

科学领域:

环境科学环境科学
分析化学分析化学
同位素地球化学同位素地球化学

背景情况:

酸氧同位素 (δ18Op) 分析对于追踪水环境中污染源至关重要.
目前的方法需要大量的水和复杂的样本处理,这阻碍了广泛应用.
开发高效准确的 δ18Op 分析技术对于水质管理至关重要.

研究的目的:

开发和验证一种用于 δ18Op 分析的新型现场缩,化和净化 (ZR-ISEEP) 方法.
评估载树脂 (Zr-IRC748) 对于酸盐吸附和同位素分析的性能.
克服现有方法在样本量和处理复杂性的局限性.

主要方法:

开发了Zr加载的Amberlite IRC-748树脂 (ZR-ISEEP),用于现场酸盐丰富.
使用弗洛伊德利希等温和和伪二次运动模型来描述酸盐吸附.
使用X射线衍射和与常规方法进行比较,验证了沉银酸盐 (Ag3PO4) 的纯度和同位素完整性.
将该方法应用于含酸盐度低的河水样本.

主要成果:

Zr-IRC748树脂表现出极好的酸盐吸附 (R2 = 0.98),不受常见离子的影响.
采用ZR-ISEEP方法,成功地用最小的同位素分离方法生产了高纯度的Ag3PO4.
从河水中有效丰富酸盐 (0.047-0.056毫克/升),使用100毫升树脂在4天内实现.
与即时采样方法相比,结果没有显著差异 (P > 0.05).

结论:

该ZR-ISEEP方法提供了一个可行的,高效的,准确的方法,用于 δ18Op分析水体.
这种技术简化了样本采集和处理,减少了对大量水的需求.
这些发现为改善 δ18Op 监测和识别污染源奠定了坚实的基础.

关键词:

珀 IRC-748树脂可以使用.酸盐是氧同位素的同位素.是一种的物质.氧化氧化氧化氧化八水合物

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