کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6307321 | 1618830 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantitative characterization of hydroxyl radical generation in a goethite-catalyzed Fenton-like reaction
ترجمه فارسی عنوان
خصوصیات کمی از تولید رادیکال هیدروکسیل در یک واکنش مشابه فنتون کاتالیزوری گوتیت
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کلمات کلیدی
خصوصیات کمی، رادیکال هیدروکسیل، واکنش پنومونیک ناهمگن، برو 7-هیدروسیکومارین،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
In order to find out the truth of influence of solution chemistry on the oxidation efficiency of a goethite-catalyzed Fenton-like reaction, the amount of hydroxyl radicals (OH) was quantified by using coumarin as its trapping agent to produce the only fluorescent derivative 7-hydroxycoumarin (7-HC), because OH was the reactive species responsible for the oxidation activity of Fenton reactions. The concentration of OH achieved maximum at solution pH of 3 and decreased with an increase of solution pH value. However, considerable amount of OH can also generate at near neutral pH (i.e. pH 6 and 7). The concentration of OH was increased both with increasing of goethite and H2O2 dosages, but H2O2 could compete with coumarin to scavenge OH to reduce the formation of 7-HC when the concentration of H2O2 was too high. Anions inhibited OH generation followed an order of H2PO4â > SO42â > Clâ > NO3â > ClO4â. Higher concentrations of Clâ and SO42â resulted in greater inhibition of OH generation. Results of this study demonstrated that the influence of solution chemistry on the oxidation efficiency of the goethite-catalyzed Fenton-like reaction was greatly attributed to the effect of solution chemistry on the amount of OH formed in the process of reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 141, December 2015, Pages 7-12
Journal: Chemosphere - Volume 141, December 2015, Pages 7-12
نویسندگان
Zhi-Rong Lin, Ling Zhao, Yuan-Hua Dong,