کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
582471 | 1453164 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ametryn degradation in the ultraviolet (UV) irradiation/hydrogen peroxide (H2O2) treatment
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Ultraviolet (UV) irradiation (253.7Â nm) in the presence of hydrogen peroxide (H2O2) was used to decompose aqueous ametryn. The concentrations of ametryn were measured with time under various experiment conditions. The investigated factors included H2O2 dosages, initial pH, initial ametryn concentrations, and a variety of inorganic anions. Results showed that ametryn degradation in UV/H2O2 process was a pseudo-first-order reaction. Removal rates of ametryn were greatly affected by H2O2 dosage and initial concentrations of ametryn, but appeared to be slightly influenced by initial pH. Furthermore, we investigated the effects of four anions (SO42â, Clâ, HCO3â, and CO32â) on ametryn degradation by UV/H2O2. The impact of SO42â seemed to be insignificant; however, Clâ, HCO3â, and CO32â considerably slowed down the degradation rate because they could strongly scavenge hydroxyl radicals (OH) produced during the UV/H2O2 process. Finally, a preliminary cost analysis revealed that UV/H2O2 process was more cost-effective than the UV alone in removal of ametryn from water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 164, Issues 2â3, 30 May 2009, Pages 640-645
Journal: Journal of Hazardous Materials - Volume 164, Issues 2â3, 30 May 2009, Pages 640-645
نویسندگان
Nai-yun Gao, Yang Deng, Dandan Zhao,