کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7008482 1455351 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of organic pollutants in municipal reverse osmosis concentrate by electrospray ionization-quadrupole time-of-flight tandem mass spectrometry and photocalaytic degradation methods
ترجمه فارسی عنوان
تعیین آلاینده های آلی در کنسانتره اسمز معکوس شهری با استفاده از اسپکترومتراسیون دو بعدی یونیزاسیون اسپکتروفتومتر الکترو اسپری و تخریب فتوکالایتیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی
Recently UV/TiO2 photocatalytic treatment for municipal reverse osmosis concentrate (ROC) has drawn increasing attention due to its high efficiency and low cost. We determined the organics in ROC samples by a combination of multiple analytical techniques: i.e. electrospray ionization-quadrupole time of flight (ESI-QToF), photocatalytic degradation method, total organic carbon (TOC) analysis, fluorescence spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy and gas chromatography/mass spectrometry (GC/MS). By these multiple techniques we were able to determine the total dissolved organic carbon (DOC) to be 24.50 ppm, which was composed of high molecular weight (MW) (> 2000 Da) natural organic matter (NOM) of 23.36 ppm (95.35%wt.) and low MW (< 2000 Da) fluorosurfactants of 1.08 ppm (4.41%), and pharmaceuticals & other organic compounds of 0.06 ppm (0.24%). Using ESI-QToF tandam mass spectrometry, molecular structures of 5 series of fluorosurfactants (63 compounds) and 9 phamaceuticals were elucidated. Conjugated compounds and sample color were monitored by UV-Vis spectroscopy. No volatile organic compounds (VOCs) were detected in the ROC samples by GC/MS. A combination of these 6 techniques provided a comprehensive method to depict the overall constituents of various organics in ROC. Quantitative estimation of organic compounds and structural determination of surfactants and pharmaceuticals in ROC were also investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 344, 1 July 2014, Pages 206-211
نویسندگان
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