کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4910017 | 1427558 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorption and oxidation study on arsenite removal from aqueous solutions by polyaniline/polyvinyl alcohol composite
ترجمه فارسی عنوان
مطالعه جذب و اکسیداسیون بر روی حذف آرسنیت از محلول های آبی با استفاده از کامپوزیت پلیانیلین / پلی وینیل الکل
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کلمات کلیدی
پلی آنیلین، آرسنیک، کامپوزیت، جذب، آب حذف،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
In this study, the Polyaniline/Polyvinyl Alcohol (PANi/PVA) composite was examined for arsenite (As(III)) removal from aqueous solution. The effect of several parameters including PVA concetration (0-5Â g/L), pH (1-13), adsorbent dosage (0.5-6Â g/L), contact time (0-120Â min), initial As(III) concentration (0.5-100Â mg/L), and As(III) oxidation were evaluated on the adsorption efficiency. The results indicated that PVA has an effective role in increasing adsorptive capacity of PANi, by changing its morphology and extending its active surface sites. The adsorption process was pH dependent and As(III) removal consistently improved by increasing solution pH. Adsorption reached equilibrium within 1Â h and Kinetics study showed that the adsorption process followed the pseudo-second-order rate model. Maximum arsenite removal efficiency was obtained when 2Â g/L of PANi/PVA was added to the solution. The equilibrium adsorption data were well fitted to Langmuir isoterm model, and the maximum adsorption capacity of arsenite was 27.25Â mg/g. Furthermore, arsenite oxidation led to 65% adsorption enhancement at the neutral aqueous system and also decreased the sensitivity of adsorption to pH.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Water Process Engineering - Volume 14, December 2016, Pages 101-107
Journal: Journal of Water Process Engineering - Volume 14, December 2016, Pages 101-107
نویسندگان
Mohammadyousef Roghani, Seyyed Ali Akbar Nakhli, Masoud Aghajani, Mohammad Hossein Rostami, Seyed Mehdi Borghei,