کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5759556 1623060 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decay of sewage-sourced microbial source tracking markers and fecal indicator bacteria in marine waters
ترجمه فارسی عنوان
فساد مارکرهای ردیابی منبع میکروبی منابع فاضلاب و باکتری های شاخص مدفوع در آبهای دریایی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
The decay of sewage-sourced enterococci, Escherichia coli, three human-associated microbial source tracking (MST) markers, Salmonella, Campylobacter, and norovirus GII was measured in situ in coastal, marine waters. Experiments examined the effects of sunlight intensity and season on decay. Seawater was seeded with untreated sewage, placed into permeable dialysis bags, and deployed in the coastal ocean near the water surface, and at 18 cm, and 99 cm depths, to vary solar intensity, during winter and summer seasons. Microbial decay was modeled using a log-linear or shoulder log-linear decay model. Pathogen levels were too low in sewage to obtain kinetic parameters. Human-associated MST markers all decayed with approximately the same rate constant (k ∼ 1.5 d−1) in all experimental treatments, suggesting markers could be detectable up to ∼6 days after a raw sewage spill. E. coli and enterococci (culturable and molecular marker) k significantly varied with season and depth; enterococci decayed faster at shallow depths and during the summer, while E. coli decayed faster at shallow depths and during the winter. Rate constants for MST markers and culturable FIB diverged except at the deepest depth in the water column potentially complicating the use of MST marker concentrations to allocate sources of FIB contamination.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 108, 1 January 2017, Pages 106-114
نویسندگان
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