کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6384788 | 1626645 | 2014 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sedimentary dynamics of coastal organic matter: An assessment of the porewater size/reactivity model by spectroscopic techniques
ترجمه فارسی عنوان
پویایی رسوبی مواد آلی ساحلی: ارزیابی مدل اندازه آب / خنثی با استفاده از تکنیک های طیف سنجی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
Sedimentary organic matter (SOM) mineralization is the driving force in diagenesis activity. This biogeochemical process, which controls the mobility of a huge number of elements and especially SOM transformations in surface and deep (down to â50 cm) sediments, was assessed in this study via seasonal monitoring with sediment core sampling in Toulon Bay (SE France). The SOM diagenetic degradation resulted in an important production of nutrients (NO3â/NH4+, PO43â, Si(OH)4, etc.) in porewater associated with dissolved organic matter (DOM) characteristic modifications, which are seasonally dependent. Within this seasonal variation, different elemental ratios (C/P, C/Si) as well as absorbance and fluorescence characteristics were observed in surface and deep sediments, illustrating two pools of SOM, i.e., “fresh” and “buried”. Ultra-filtration results revealed the high proportion of low-molecular-weight DOM and the high-molecular-weight DOM (<3 kDa) was primarily characterized by protein-like fluorophores. The obtained results confirmed and extended the PoreWater Size/Reactivity model that describes diagenetic SOM transformations through the identification of two SOM pools and their reactivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 151, 5 December 2014, Pages 100-111
Journal: Estuarine, Coastal and Shelf Science - Volume 151, 5 December 2014, Pages 100-111
نویسندگان
Duc Huy Dang, Véronique Lenoble, Gaël Durrieu, Jean-Ulrich Mullot, Stéphane Mounier, Cédric Garnier,