کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5512419 1540223 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Grafting of aniline derivatives onto chitosan and their applications for removal of reactive dyes from industrial effluents
ترجمه فارسی عنوان
پیوند مشتقات آنیلین به کیتوزان و کاربرد آنها برای حذف رنگ های واکنشی از پساب های صنعتی
کلمات کلیدی
کیتوزان، مشتقات پلی آنیلین، اسید قرمز 4، مستقیم قرمز 23، سینتیک جذب، ایزوترم جذب، درمان محیطی،
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی

A series of chitosan-grafted polyaniline derivatives {chitosan-g-polyaniline (CS-g-PANI), chitosan-g-poly(N-methylaniline) (CS-g-PNMANI), and chitosan-g-poly(N-ethylaniline) (CS-g-PNEANI)} were synthesized by in situ chemical oxidation polymerization method. The synthesized copolymers were analyzed by means of Fourier transform infrared (FTIR), and ultraviolet-visible (UV-vis) spectroscopies, thermogravimetric analysis (TGA), and field emission scanning electron microscopy (FE-SEM). These copolymers were applied as adsorbent for removal of acid red 4 (AR4) and direct red 23 (DR23) from aqueous solutions. The adsorption processes were optimized in terms of pH, adsorbent amount, and dyes concentrations. The maximum adsorption capacities (Qm) for the synthesized copolymers were calculated, and among them the CS-g-PNEANI sample showed highest Qm for both AR4 (98 mg g−1) and DR23 (112 mg g−1) dyes. The adsorption kinetics of AR4 and DR23 dyes follow the pseudo-second order kinetic model. The regeneration and reusability tests revealed that the synthesized adsorbents had the relatively good reusability after five repetitions of the adsorption-desorption cycles. As the results, it is expected that the CS-g-PANIs find application for removal of reactive dyes (especially anionic dyes) from industrial effluents mainly due to their low production costs and high adsorption effectiveness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 95, February 2017, Pages 393-403
نویسندگان
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