在一个大城市河流中硫酸盐的来源识别和沿海出口:从硫同位素和反向模型的洞察力
Xuehui Liu1, Guilin Han1, Jinke Liu1
1State Key Laboratory of Geomicrobiology and Environmental Changes, Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing, 100083, China; Frontiers Science Center for Deep-time Digital Earth, China University of Geosciences (Beijing), Beijing, 100083, China.
Marine pollution bulletin
|February 10, 2026
概括
超大城市河流中的过度硫酸盐 (SO4^2-) 威胁到海洋生态系统. 这项研究追踪了永定河中的硫酸盐来源,发现人类活动显著增加了下游污染,影响了博海海硫循环.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 海洋生物学 海洋生物学
背景情况:
- 大城市的河流将大量的硫酸盐 (SO4^2-) 输送到边缘海洋,破坏了海洋生态系统的健康.
- 了解硫酸盐来源对于管理海洋环境和防止污染至关重要.
- 永定河是波海的一个重要支流,面临着城市活动造成的大量硫酸盐负载.
研究的目的:
- 在永定河中量化硫酸盐 (SO4^2-) 和硫同位素 (δ34SSO4) 的度.
- 识别和确定各种硫酸盐来源的贡献,自然和人为.
- 评估人类活动对硫循环的影响,并提出陆海综合流域管理的管理策略.
主要方法:
- 现场采样和化学分析水样中硫酸盐 (SO4^2-) 和 δ34SSO4.4 的含量.
- 应用化学指标和离子比,以确定潜在的硫酸盐来源.
- 使用蒙特卡洛反向模型整合同位素和离子数据进行源分配.
主要成果:
- 硫酸盐 (SO4^2-) 度平均为147 mg·L-1, δ34SSO4值在+5.85‰至+14.99‰之间.
- 自然气候在上游占主导地位 (61%),而人为来源 (污水:41%,工业:33%) 在下游占主导地位 (75%).
- 波海每年硫酸盐 (SO4^2-) 流量估计为2.31 × 10-4 Tmol/年,其中超过70%来自人为来源.
结论:
- 人为活动,特别是污水和工业排放,是永定河硫酸盐 (SO4^2-) 污染及其向波海出口的主要驱动因素.
- 为有效的污染控制和综合的流域管理提出了水文负载减氧 (H-L-R) 框架.
- 反向建模为人类影响的海洋系统中的污染物追踪和风险评估提供了强大的工具.
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