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非城市洪水中的化学和微生物污染的空间和时间动态

Minna Saaristo¹, Christopher P Johnstone¹, Phoebe Lewis¹

¹Environment Protection Authority, EPA Science, Macleod, Victoria 3085, Australia.

Environmental science & technology

|November 25, 2024

概括

大洪水污染了水的85种检测到的化学物质和病原体,如肠杆菌. 土地利用和水流影响污染物水平,突出了气候驱动的洪水事件中的风险.

科学领域:

环境化学环境化学
环境微生物学环境微生物学
水文学的水文学

背景情况:

在大洪水期间,由于采样挑战,人们对水中传播的污染物知之甚少.
后勤困难阻碍了在危险的洪水条件下采样.

研究的目的:

描述水中传播的污染物和洪水中的微生物群落.
研究土地利用和水文因素对污染物分布的影响.
在洪水事件中评估人类和环境风险.

主要方法:

在26天内,在澳大利亚维多利亚州的七条河流收集了83个洪水样本.
分析了778种化学污染物的样本,并使用环境DNA (eDNA) 识别了544种微生物.
与土地使用,水流,降雨量和水位数据相关联的污染物和微生物数据.

主要成果:

在洪水中检测到85种污染物,包括杀菌剂,酸盐,宏营养素,金属化物,药品和个人护理产品 (PPCP).
土地使用主要解释了杀菌剂,酸盐,宏营养素,金属化物和PPCP的变化;除草剂和杀虫剂受到土地使用和水流的影响.
潜在致病性微生物的检测率很高:肠杆菌 (82.4%),菌根菌 (70.6%) 和军团菌 (58.8%).

结论:

洪水污染物和微生物概况受到土地使用和水文动态的影响.
检测到的污染物和病原体在洪水事件期间会给人类和环境带来各种风险.
强调需要及时监测,以在气候驱动的洪水期间为决策提供信息.

关键词:

气候变化气候变化气候变化新兴关注的污染物环境 DNA DNA 环境 DNA 土地使用和地表水流模型.质量流量量流量量流量量流量量.

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