کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4407670 1618818 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fluorescence spectroscopy for monitoring reduction of natural organic matter and halogenated furanone precursors by biofiltration
ترجمه فارسی عنوان
طیف سنجی فلورسانس برای نظارت بر کاهش مواد آلی طبیعی و پیش آگهی های هوروژنز هیدروژنی بوسیله بیوفیلتراسیون
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• Unique removal performance of several fluorescence components by biofiltration.
• A humic-like component recalcitrant to biofiltration was identified.
• Granular activated carbon as a biofilter support media increased organic reduction.
• Halogenated furanone and genotoxicity was correlated to organic components.
• Results suggest polysaccharides as a possible halogenated furanone precursor.

The application of fluorescence spectroscopy to monitor natural organic matter (NOM) reduction as a function of biofiltration performance was investigated. This study was conducted at pilot-scale where a conventional media filter was compared to six biofilters employing varying enhancement strategies. Overall reductions of NOM were identified by measuring dissolved organic carbon (DOC), and UV absorbance at 254 nm, as well as characterization of organic sub-fractions by liquid chromatography–organic carbon detection (LC-OCD) and parallel factors analysis (PARAFAC) of fluorescence excitation-emission matrices (FEEM). The biofilter using granular activated carbon media, with exhausted absorptive capacity, was found to provide the highest removal of all identified PARAFAC components. A microbial or processed humic-like component was found to be most amenable to biodegradation by biofilters and removal by conventional treatment. One refractory humic-like component, detectable only by FEEM-PARAFAC, was not well removed by biofiltration or conventional treatment. All biofilters removed protein-like material to a high degree relative to conventional treatment. The formation potential of two halogenated furanones, 3-chloro-4(dichloromethyl)-2(5H)-furanone (MX) and mucochloric acid (MCA), as well as overall treated water genotoxicity are also reported. Using the organic characterization results possible halogenated furanone and genotoxicity precursors are identified. Comparison of FEEM-PARAFAC and LC-OCD results revealed polysaccharides as potential MX/MCA precursors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 153, June 2016, Pages 155–161
نویسندگان
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