使用单井,推拉试验技术量化浅地下水中的脱率
Aldrin Rivas1, Ranvir Singh2, David Horne2
1Environmental Science, School of Agriculture and Environment, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand; Currently with WSP New Zealand, 168-170 Tristram Street, Hamilton 3204, New Zealand.
Journal of contaminant hydrology
|January 22, 2025
概括
准确量化地下水中的脱率对于评估酸盐污染至关重要. 这项研究比较了方法,发现酸盐减少测量比氧化测量提供了更高,可能更具代表性的脱率.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 地质化学 地质化学
背景情况:
- 脱化是从地下水中去除酸盐的关键过程.
- 精确量化脱率对于管理地下水中酸盐污染至关重要.
- 有限的研究存在浅地下水脱率使用不同的分析和动力学方法.
研究的目的:
- 评估不同的分析方法 (反应物与产物) 和动力模型 (零级与第一级) 用于量化浅地下水脱率.
- 为了比较从酸盐减少和氧化生产中获得的脱率估计.
- 评估零级和一级运动模型在分析推拉测试数据中对脱化的适用性.
主要方法:
- 在新西兰Manawatū河流域的两个地点进行了单井推拉试验.
- 分析了地下水样本,以测量酸盐减少 (反应物) 和氧化生产 (产品).
- 应用了零级和一级的动力模型来估计脱率.
主要成果:
- 基于酸盐减少的脱率明显高 (6-60倍) 于基于氧化生产的脱率.
- 零级动力模型给出了0.05-0.12 mg N L−1 h−1 (WDV) 和0.42-1.07 mg N L−1 h−1 (PNR) 的速度.
- 第一个阶级的动力模型给出了0.002-0.012h-1 (WDV) 和0.03-0.09h-1 (PNR) 的速率.
结论:
- 酸盐减少测量可以为浅地下水系统提供更具代表性的脱率,特别是当全面的物种分析不切实际时.
- 零级和一级的动力模型都可用于分析推拉试验中的脱率.
- 速率估计的差异凸显了对适当测量技术的进一步研究的需要,以及了解脱化的空间和时间变化.
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