کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9451540 1307828 2005 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced chemical oxidation of aromatic hydrocarbons in soil systems
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Enhanced chemical oxidation of aromatic hydrocarbons in soil systems
چکیده انگلیسی
Fenton's destruction of benzene, toluene, ethylbenzene, and xylene (BTEX) was investigated in soil slurry batch reactors. The purpose of the investigation was to quantify the enhancement of oxidation rates and efficiency by varying process conditions such as iron catalyst (Fe(II) or Fe(III); 2, 5, and 10 mM), hydrogen peroxide (H2O2; 30, 150, 300 mM), and metal chelating agents (l-ascorbic acid, gallic acid, or N-(2-hydroxyethyl)iminodiacetic acid). Rapid contaminant mass destruction (97% after 3 h) occurred in the presence of 300 mM H2O2 and 10 mM Fe(III). An enhanced removal rate (>90% removal after 15 min and 95% removal after 3 h) was also observed by combining Fe(III), N-(2-hydroxyethyl)iminodiacetic acid and 300 mM H2O2. The observed BTEX mass removal rate constants (3.6-7.8 × 10−4 s−1) were compared to the estimated rate constants (4.1-10.1 × 10−3 s−1). The influence of non-specific oxidants loss (by reaction with iron hydroxides and soil organic matter) was also explored.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 61, Issue 7, November 2005, Pages 909-922
نویسندگان
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