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
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,N′-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 (AsO2−) and mercury (Hg2+) uptake, swellability and reusability were evaluated. The adsorption of RB4 (701 mg/g), and the uptake of AsO2− (551 mg/g) and Hg2+ (455 mg/g) showed Langmuir isotherm behavior with pseudo-first-order kinetics. The diffusion of water, RB4, AsO2− and Hg2+ into the matrix followed non-Fickian mechanism. The evaluated changes in Gibbs free energy (ΔG°), entropy (ΔS°) and enthalpy (ΔH°) 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
نویسندگان
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