کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5750583 1619695 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ranking nano-enabled hybrid media for simultaneous removal of contaminants with different chemistries: Pseudo-equilibrium sorption tests versus column tests
ترجمه فارسی عنوان
رتبه بندی رسانه های هیبریدی نانو برای حذف همزمان آلاینده ها با شیمیایی متفاوت: تست جذب شبه تعادلی در مقابل آزمون ستون
کلمات کلیدی
آرسنیک، متیل نارنجی غربالگری رسانه، جذب، دی اکسید تیتانیوم، کربن فعال گرانول،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Pseudo-equilibrium and continuous flow column testing provide the same sorbent ranking trends.
- Simultaneous Removal Capacity (SRC) indices are statistically the same for each tested media.
- GAC with the highest TiO2 content exhibited highest SRC for simultaneous contaminant removal.

The underlying hypothesis of this study was that pseudo-equilibrium and column testing conditions would provide the same sorbent ranking trends although the values of sorbents' performance descriptors (e.g. sorption capacity) may vary because of different kinetics and competition effects induced by the two testing approaches. To address this hypothesis, nano-enabled hybrid media were fabricated and its removal performances were assessed for two model contaminants under multi-point batch pseudo-equilibrium and continuous-flow conditions. Calculation of simultaneous removal capacity indices (SRC) demonstrated that the more resource demanding continuous-flow tests are able to generate the same performance rankings as the ones obtained by conducing the simpler pseudo-equilibrium tests. Furthermore, continuous overlap between the 98% confidence boundaries for each SRC index trend, not only validated the hypothesis that both testing conditions provide the same ranking trends, but also pointed that SRC indices are statistically the same for each media, regardless of employed method. In scenarios where rapid screening of new media is required to obtain the best performing synthesis formulation, use of pseudo-equilibrium tests proved to be reliable. Considering that kinetics induced effects on sorption capacity must not be neglected, more resource demanding column test could be conducted only with the top performing media that exhibit the highest sorption capacity.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 605–606, 15 December 2017, Pages 166-171
نویسندگان
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