潮抽水控制了沿海地下水和海水之间的食物传播微生物病原体的运输
Shengchao Yu1, Xuejing Wang2, Hailong Li3
1Department of Civil and Resource Engineering and Centre for Water Resources Studies, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada.
Journal of hazardous materials
|September 24, 2025
概括
潮力量和季节性降雨对沿海地下水中的食物传播病原体运动有重大影响. 了解这些动态对于保护脆弱地区的饮用水和公共卫生至关重要.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 水文地质学 水文地质学
背景情况:
- 沿海含水层是重要的水源,但容易受到微生物污染.
- 众所周知,潮动态和季节性降雨模式会影响地下水流和化学物质.
- 食物传播的病原体对沿海地区的公共健康构成重大威胁.
研究的目的:
- 研究五种主要的食源性病原体在潮影响的沿海水层中的季节性分布和迁移.
- 阐明潮抽水,降雨和陆地污染对微生物运输的联合影响.
- 了解水化和同位素指标在追踪病原体来源和途径中的作用.
主要方法:
- 综合现场观测,微生物分析和水化指标测量.
- 环境同位素分析 (222Rn, 228Ra, 228Th, δ18O) 以追踪水源和运输.
- 在干旱和雨季期间进行季节性采样和分析,以捕捉水文变化.
主要成果:
- 干旱季节:与222Rn相关的陆地病原体 (大肠杆菌,沙门氏菌) 表示地下运输.
- 雨季:加剧的潮抽水和透增强了病原体 (沙门氏菌,金黄色葡萄球菌) 的分散,海水侵入.
- 病原体的分布受到盐度,pH和氧化还原条件的显著影响,不同的物种表现出不同的息地偏好.
结论:
- 潮过程和季节性水文是沿海水层中病原体运输的关键调节者.
- 了解病原体对环境因素的特定反应是预测污染风险的关键.
- 研究结果支持综合水资源管理和公共卫生政策,以保护沿海地区.
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