کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7783569 | 1500572 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chitosan-based ion-imprinted cryo-composites with excellent selectivity for copper ions
ترجمه فارسی عنوان
کریو-کامپوزیت های حاوی یون های مبتنی بر کیتوزان با انتخاب عالی برای یون های مس
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
An original strategy is proposed here to design chitosan-based ion-imprinted cryo-composites (II-CCs) with pre-organized recognition sites and tailored porous structure by combining ion-imprinting and ice-templating techniques. The cryo-composites showed a tube-like porous morphology with interconnected parallel micro-channels, the distance between the channel walls being around 15â¯Î¼m. Both the entrapment of a natural zeolite and the presence of carboxylate groups, generated by partial hydrolysis of amide moieties, led to II-CCs with controlled swelling ratios (25-40â¯g/g, depending on pH) and enhanced overall chelating efficiency (260â¯mg Cu2+/g composite). To point out the importance of introducing Cu2+ recognition sites, sorption experiments using mixtures of Cu2+ and other competing ions (Co2+, Ni2+, Zn2+ or/and Pb2+) were also carried out. The higher values of selectivity coefficients obtained for the II-CCs compared to those of non-imprinted ones highlight the remarkable potential of our sorbents for decontamination of wastewaters and recycling of Cu2+ ions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 186, 15 April 2018, Pages 140-149
Journal: Carbohydrate Polymers - Volume 186, 15 April 2018, Pages 140-149
نویسندگان
Maria Valentina Dinu, Ionel Adrian Dinu, Maria Marinela Lazar, Ecaterina Stela Dragan,