کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1986843 1540254 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of magnetic ionic liquid/chitosan/graphene oxide composite and application for water treatment
ترجمه فارسی عنوان
آماده سازی کامپوزیت یونیک مغناطیسی یونیک / کیتوزان / گرافن اکسید و کاربرد آن برای تصفیه آب
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی


• The magnetic composite materials MCGO-IL were successful synthesized.
• The MCGO-IL demonstrates an extremely fast and efficient Cr(VI) removal.
• It shows the facile and fast separation process of the biosorbent.
• Desorption studies were performed to evaluate adsorbent efficiency.

Magnetic chitosan and graphene oxide-ionic liquid (MCGO-IL) composites as biodegradable biosorbents were synthesized by impregnating MCGO with ionic liquid. The characteristic results of FTIR, SEM, and XRD showed that MCGO-IL were successfully prepared with large surface area and good magnetic responsiveness. They were used for the removal of Cr(VI) from simulated wastewater with a fast solid–liquid separation in the presence of external magnetic field. The influence of various analytical parameters on the adsorption of Cr(VI) such as pH, contact time, and initial ion concentration were studied in detail. The adsorption followed a pseudo-second-order kinetics. The equilibrium adsorption was well-described by the Langmuir isotherm mode and the maximum adsorption capacity was 145.35 mg/g. The stronger intermolecular hydrogen bond between MCGO-IL and Cr(VI) and the hydroxyl and amine groups were believed to be the metal ion binding sites. Moreover, the MCGO-IL could be repeatedly used by simple treatment without obvious structure and performance degradation. The obtained results indicated that the impregnation of the room temperature IL significantly enhances the removal efficiency of Cr(VI). The MCGO-IL may be suitable materials in heavy metal ion pollution cleanup if they are synthesized in large scale and at low price in near future.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 66, May 2014, Pages 172–178
نویسندگان
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