在多种环境压力下,在浅浅的沿海水层中分配酸盐来源的综合地质化学和同位素框架
1School of Earth Sciences and Engineering, Sun Yat-sen University, Zhuhai 519082, China; Guangdong Provincial Key Laboratory of Geological Processes and Mineral Resource Survey, Zhuhai 519082, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China; Guangdong Pearl River Estuary Integrated Monitoring Station for Ecological Quality of Marine Ecosystem, Zhuhai 519070, China.
Water research
|March 13, 2026
概括
沿海水层中的酸盐污染主要是由污水和便造成的. 本研究量化了这些来源,以帮助城市化地区的地下水管理.
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:
- 沿海水层面临着由自然和人为因素相结合而产生的酸盐污染日益增加.
- 了解这些驱动因素对于快速城市化地区的有效地下水管理至关重要.
研究的目的:
- 为了量化珠海沿海水层中的酸盐来源,珠海是一个快速城市化的地区.
- 制定一个框架,将转化过程与源量化联系起来,以实现有针对性的管理.
主要方法:
- 综合的水地化学分析和多同位素指纹 (δ2H-H2O, δ18O-H2O, δ15N-NO3-, δ18O-NO3-).
- 使用正矩阵因子化 (PMF) 和混合模型 (MixSIAR) 的定量建模.
主要成果:
- 沉驱动的充电与人类输入和蒸发通过稳定的同位素确定.
- 盐度增强的地质释放和随后的化是沿海热点的关键驱动因素.
- 通过定量分配,污水和便被确定为主要的酸盐来源 (80.5 ± 9.7%).
结论:
- 一个"过程识别-来源分配"框架有效地将过程与来源量化联系起来.
- 该研究为确定污染热点和优先考虑脆弱沿海水层的控制策略提供了方法支持.
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