کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8854314 | 1618913 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparision of photocatalysis and photolysis processes for arsenic oxidation in water
ترجمه فارسی عنوان
مقایسه فرآیندهای فتوکاتالیز و فوتولیز برای اکسیداسیون آرسنیک در آب
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کلمات کلیدی
فوتوکاتالیز ناهمگن، فتولیز، اکسیداسیون آرسنیک، دی اکسید تیتانیوم،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
The oxidation of As(III) to As(V) in aqueous solution was evaluated using heterogeneous photocatalysis and photolysis. The influence of TiO2 as catalyst in different crystalline (rutile, anatase) and commercial forms was evaluated in a batch reactor and an insignificant difference was observed between them. The process by photocatalysis reached up to 97% As(III) oxidation and no significant difference was observed comparing to results obtained by photolysis. The photolysis experiments (UV radiation only), also carried out in a batch system, showed a high oxidation rate of As(III) (90% in 20 min). The influence of different matrices (well water, river water and public water supply) were evaluated. Additionally, the effect of As(V) concentration, generated during the oxidation process, was studied. Continuous photolysis experiments using only UV radiation were performed, resulting in a high As(III) oxidation rate. Using a flow rate of 5 mL minâ1 and an initial concentration of As(III) 200 µg Lâ1, gave an oxidation percentage of As(III) of up to 72%, showing a simple and economical alternative to the oxidation step of As(III) to As(V) in the treatment of water contaminated with arsenic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 151, 30 April 2018, Pages 127-131
Journal: Ecotoxicology and Environmental Safety - Volume 151, 30 April 2018, Pages 127-131
نویسندگان
Klaiani B. Fontana, Giane G. Lenzi, Eriton C.R. Seára, Eduardo S. Chaves,