کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4453972 1620820 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Advanced treatment of biologically pretreated coal gasification wastewater by a novel heterogeneous Fenton oxidation process
ترجمه فارسی عنوان
درمان پیشرفته پساب فاضلاب گازسیلی پیش از زیست زدایی با فرآیند اکسیداسیون فنتون جدید ناهمگن
کلمات کلیدی
پساب فاضلاب گازیته زغالسنگ پیشگیری از زباله، اکسایش هیدروژن فنتون، کاتالیزور، تجزیه زیستی، مکانیسم
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
چکیده انگلیسی

Sewage sludge from a biological wastewater treatment plant was converted into sewage sludge based activated carbon (SBAC) with ZnCl2 as activation agent, which was used as a support for ferric oxides to form a catalyst (FeOx/SBAC) by a simple impregnation method. The new material was then used to improve the performance of Fenton oxidation of real biologically pretreated coal gasification wastewater (CGW). The results indicated that the prepared FeOx/SBAC significantly enhanced the pollutant removal performance in the Fenton process, so that the treated wastewater was more biodegradable and less toxic. The best performance was obtained over a wide pH range from 2 to 7, temperature 30°C, 15 mg/L of H2O2 and 1 g/L of catalyst, and the treated effluent concentrations of COD, total phenols, BOD5 and TOC all met the discharge limits in China. Meanwhile, on the basis of significant inhibition by a radical scavenger in the heterogeneous Fenton process as well as the evolution of FT-IR spectra of pollutant-saturated FeOx/BAC with and without H2O2, it was deduced that the catalytic activity was responsible for generating hydroxyl radicals, and a possible reaction pathway and interface mechanism were proposed. Moreover, FeOx/SBAC showed superior stability over five successive oxidation runs. Thus, heterogeneous Fenton oxidation of biologically pretreated CGW by FeOx/SBAC, with the advantages of being economical, efficient and sustainable, holds promise for engineering application.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Sciences - Volume 33, 1 July 2015, Pages 12–20
نویسندگان
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