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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Indicator Organisms Associated with Stormwater Suspended Particles and Estuarine Sediment
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Indicator Organisms Associated with Stormwater Suspended Particles and Estuarine Sediment

机译：与雨水悬浮颗粒和河口沉积物有关的指示生物

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This study examined the fate of indicator organisms (fecal coliform, E. coli, and entero-cocci) from urban stormwater runoff associated with estuarine sediments and stormwa-ter suspended particles. The research found a significant increase of fecal coliform, E. coli, and enterococci in the estuarine sediments at study sites following a given stormwater event. The sedimentation mechanism was linked to an increase in indicator organisms in the estuarine sediments. These indicator organisms attached to stormwater suspended particles, which then settled to the bottom sediment. A higher percentage of attachment onto stormwater suspended particles was observed for E. coli as compared to enterococci and fecal coliform. Among the three organisms, enterococci preferentially attached to the particles with diameters from 10 μm to 30 μm, while fecal coliform and E. coli had a broader distribution. Estuarine sediments were found to prolong survival of indicator organisms for at least seven days prior to reduction to background levels.
机译：这项研究检查了与河口沉积物和雨水悬浮颗粒有关的城市雨水径流中指示生物（粪便大肠菌，大肠杆菌和肠球菌）的命运。该研究发现，在给定的暴雨事件之后，研究地点的河口沉积物中粪便大肠菌，大肠杆菌和肠球菌显着增加。沉积机理与河口沉积物中指示生物的增加有关。这些指示生物附着在雨水悬浮颗粒上，然后沉降到底部沉积物上。与肠球菌和粪便大肠菌群相比，大肠杆菌对雨水悬浮颗粒的附着率更高。在这三种生物中，肠球菌优先附着在直径为10μm至30μm的颗粒上，而粪便大肠菌和大肠杆菌分布更广。在降低到背景水平之前，发现河口沉积物可将指示生物的生存期延长至少7天。

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