کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6355324 1315041 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Statistical analysis of optimum Fenton oxidation conditions for landfill leachate treatment
ترجمه فارسی عنوان
تجزیه و تحلیل آماری شرایط بهینه اکسیداسیون فنتون برای درمان شیلات زباله
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی

Optimal operating conditions observed by peer reviewed publications for Fenton oxidation of raw and biological and coagulation treated leachates were reviewed and statistically analyzed. For the first-stage Fenton oxidation, the optimal pH range of 2.5-4.5 was observed for raw and coagulation treated leachates with a median pH of 3.0, whereas, for biologically treated leachate the optimum pH range was 2.5-6.0 with a median pH of 4.2. Theoretically, the optimal ratio of H2O2/Fe2+ should be the ratio of rate constants of the reactions between OH radical with Fe2+ and H2O2, which is approximately 11; however, for leachate treatment, a median optimum relative dose of 1.8 (w/w) (3.0 M/M) was observed. Biologically treated leachate showed relatively lower optimum ratio of H2O2/Fe2+ doses (median: 0.9 w/w) as compared to raw (median: 2.4 w/w) and coagulation treated (median: 2.8 w/w) leachate. Median absolute doses of H2O2 and Fe2+ were 1.2 mg H2O2/mg of initial COD (COD0) and 0.9 mg Fe2+/mg COD0, respectively and raw leachate required higher reagent doses compared to pretreated leachates. A universal Fenton oxidation relationship between COD removal efficiency (η) and COD loading factor (LCOD) for landfill leachate treatment was developed. As LCOD increases from 0.03 to 72.0, η varies linearly as η=0.733LCOD-0.182. This robust linear relationship between LCOD and η holds for Fenton oxidation of raw as well as biological and coagulation treated leachates. The relationship was validated using Leave-one-out cross validation technique and errors in predicting η using LCOD were evaluated by applying Monte Carlo Simulation. As a result, the relationship can be used as a universal equation to predict Fenton treatment efficiency for a given COD0 loading in the range of 0.03-72.0 for landfill leachate treatment.

► Optimal conditions for Fenton oxidation of leachate were statistically analyzed. ► Median values of optimum pH and H2O2/Fe2+ were 3.0 and 1.8, respectively. ► Median H2O2/COD0 and Fe2+/ COD0 doses were 1.2 and 0.9, respectively. ► Treatment efficiency linearly varied with COD loading factor as η = 0.733 LCOD-0.182.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 33, Issue 1, January 2013, Pages 81-88
نویسندگان
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