کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7789509 | 1500641 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modified chitosan for the collection of reactive blue 4, arsenic and mercury from aqueous media
ترجمه فارسی عنوان
کیتوزان اصلاح شده برای جمع آوری آبی 4 واکنش پذیر، آرسنیک و جیوه از محیط های آبی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
In the present investigation a series of modified chitosan as adsorbents were synthesized free radically at 70 °C using acryloylated chitosan (AC-chitosan) as macromer, 2-acrylamido-2-methyl-1-propansulfonic acid (AMPS), 2-(diethylamino) ethylmethacrylate (DAEMA) as co-monomers and N,Nâ²-methylene bisacrylamide (N-MBA) as a crosslinker for using as adsorbents in effluent remediation. Their structures (1H and 13C NMR), thermal stability (TG/DTG), surface morphology (SEM), reactive blue 4 (RB4), toxic metals such as arsenic (AsO2â) and mercury (Hg2+) uptake, swellability and reusability were evaluated. The adsorption of RB4 (701 mg/g), and the uptake of AsO2â (551 mg/g) and Hg2+ (455 mg/g) showed Langmuir isotherm behavior with pseudo-first-order kinetics. The diffusion of water, RB4, AsO2â and Hg2+ into the matrix followed non-Fickian mechanism. The evaluated changes in Gibbs free energy (ÎG°), entropy (ÎS°) and enthalpy (ÎH°) for adsorption indicated that the process was exothermic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 117, 6 March 2015, Pages 123-132
Journal: Carbohydrate Polymers - Volume 117, 6 March 2015, Pages 123-132
نویسندگان
V. Dhanapal, K. Subramanian,