在河湖系统中追踪源,使用酸盐的氧同位素
Fan Le1, Xiaohong Ruan1, Zhao Wei1
1Department of HydroSciences, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China; MOE Key Laboratory of Surficial Geochemistry, Nanjing University, Nanjing 210023, China.
The Science of the total environment
|July 26, 2024
概括
在河湖系统中追踪源是管理缩的关键. 这项研究使用酸氧同位素 (δ18Op) 来确定在山湖的来源,揭示了农业,家庭和工业投入,以及沉积物释放.
科学领域:
- 环境化学环境化学
- 同位素地球化学 同位素地球化学
- 临界技术 临界技术
背景情况:
- (P) 在河湖系统中的生态化学循环是复杂的,阻碍了有效的源源追踪以进行安化管理.
- 开发强大的可追溯性方法对于水生生态系统的有针对性的污染控制至关重要.
研究的目的:
- 利用酸盐的氧同位素 (δ18Op) 作为标记物,在山湖河湖系统中识别源.
- 建立一个从潜在的终端成员到湖的追踪途径,区分各种入流河流的贡献.
主要方法:
- 在潜在的末成员 (污水,工业废水,土壤) 和河流/湖水和沉积物中测量 δ18Op 值.
- 应用MixSIAR模型用于的定量来源分配.
- 根据水文和水质数据计算污染物流量.
主要成果:
- 工业废水显示出明显的 δ18Op签名 (13.121.0 ‰,平均16.8 ‰ ± 3.2 ‰).
- 石家庄河主要来自农业和家庭来源; 清浦河受到家庭和工业废水的影响.
- 山湖源于干旱季的外部投入 (80.6%) 和内部沉积物释放 (19.4%).
结论:
- 这项研究使用 δ18Op.成功追踪了Dianshan湖系统中的源.
- 农业非点源,家用污水和沉积物释放被确定为干旱季节在山湖的主要贡献者.
- 研究结果为河湖生态系统的污染控制策略和环境保护提供了关键的见解.
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