在南汉河流域及其主要支流中使用多同位素和贝叶斯方法分配酸盐来源
Hyeongseok Song1, Kwang-Sik Lee2, Nohsung Jeong3
1Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea; Chromatography and Mass Spectrometry Division, Thermo Fisher Scientific Korea, Seoul 06349, Republic of Korea.
Journal of contaminant hydrology
|January 20, 2026
概括
这项研究使用了酸盐分配方法来识别和量化南汉河的污染源. 结果表明,家用废水比农业投入更多地影响水化学.
科学领域:
- 环境科学 环境科学
- 水质管理水质管理
- 同位素水文学 同位素水文学
背景情况:
- 南汉河 (SHR) 和其支流的营养水平较高,需要确定来源以有效管理水质.
- 来自各种来源的污染,包括农业排水和废水处理厂 (WWTP),影响着河流生态系统.
- 了解酸盐来源对于缓解肥胖和确保水资源可持续性至关重要.
研究的目的:
- 确定导致南汉河及其支流中酸盐污染的主要来源.
- 量化估计影响SHR水化学的不同酸盐来源的分配.
- 评估使用多个同位素和贝叶斯模型来追踪酸盐来源的有效性.
主要方法:
- 从SHR,它的支流,北汉河 (NHR), Gyeongan Stream (GA) 和废水处理厂 (WWTP) 收集了水样.
- 分析涉及对SO4/Cl和NO3/Cl的比率进行比较,并进行稳定同位素分析 (δ34S, δ11B, δ15N-NO3).
- 使用贝叶斯同位素混合模型来估计各种酸盐来源的贡献.
主要成果:
- 在SHR/NHR和支流/GA/WWTP样本之间,SO4/Cl和NO3/Cl的比率有所不同,在特定的支流中观察到不同的同位素特征.
- 贝叶斯模型估计土壤气 (58.9%93.3%) 和便/家用污水 (15.9%40.3%) 在SHR中对酸盐的显著贡献.
- 同位素分析 (δ11B和δ15N-NO3) 表明,家用废水对农业投入对SHR水化学的影响更大.
结论:
- 综合的多同位素方法与贝叶斯模型相结合,有效地识别和分配河流系统中的酸盐来源.
- 国内废水是南汉河中酸盐污染的重要,而且可能被低估的来源.
- 调查结果强调需要针对性管理策略,解决农业和家庭废水排放,以改善SHR水质.
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