کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4482208 1316851 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fractional, biodegradable and spectral characteristics of extracted and fractionated sludge extracellular polymeric substances
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Fractional, biodegradable and spectral characteristics of extracted and fractionated sludge extracellular polymeric substances
چکیده انگلیسی

Correlation between fractional, biodegradable and spectral characteristics of sludge extracellular polymeric substances (EPS) by different protocols has not been well established. This work extracted sludge EPS using alkaline extractants (NH4OH and formaldehyde + NaOH) and physical protocols (ultrasonication, heating at 80 °C or cation exchange resin (CER)) and then fractionated the extracts using XAD-8/XAD-4 resins. The alkaline extractants yielded more sludge EPS than the physical protocols. However, the physical protocols extracted principally the hydrophilic components which were readily biodegradable by microorganisms. The alkaline extractants dissolved additional humic-like substances from sludge solids which were refractory in nature. Different extraction protocols preferably extracted EPS with distinct fractional, biodegradable and spectral characteristics which could be applied in specific usages.

Figure optionsDownload high-quality image (305 K)Download as PowerPoint slideHighlights
► Fractionation of the sludge EPS extracted by physical and chemical protocols.
► Alkaline extractions yielded more crude EPS than did physical protocols.
► The aromatic, carboxylic and hydrocarbon were preferentially extracted by alkaline.
► Aliphatic materials could be efficiently extracted by physical protocols.
► EPS by physical extraction showed higher BDOC/DOC ratios than that by alkaline.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 46, Issue 14, 15 September 2012, Pages 4387–4396
نویسندگان
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