کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
592066 1453891 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface functionalization graphene oxide by polydopamine for high affinity of radionuclides
ترجمه فارسی عنوان
کاربرد عامل اکسید گرافین توسط پلیدوپامین برای بالا بودن نسبت رادیونوکلئید
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• PD/GO composites were synthesized by the oxidative self-polymerization of dopamine on the surface of GO.
• Abundant functional groups were exposed to capture uranium.
• The enhanced adsorption activity was attributed to the synergistic effect of PD and GO.
• The PD/GO composites sample can support long-term use in nuclear waste management.

The utilization of nuclear energy plays an important role in our energy system; however, the leaking of radionuclides has potential threat to human health. In this paper, two-dimensional polydopamine/graphene oxide (PD/GO) composites were synthesized through a simple bio-inspired surface functionalization process by self-polymerization of dopamine monomers on GO surface. To evaluate the adsorption performance of PD/GO composites, the adsorbent was applied to remove uranium(VI) from aqueous solutions. Based on the Langmuir's equation, the maximum adsorption capacity was calculated to be 145.39 mg · g−1 by PD/GO composites, which is higher than that of pure PD (34.21 mg · g−1) and GO (75.71 mg · g−1). The enhanced adsorption capacity was mainly ascribed to the synergistic effect of PD with multifunctional groups and GO with high surface area. The adsorption process fitted well with the Langmuir adsorption isotherm and a pseudo-second order kinetics. Moreover, adsorption and regeneration experiment proved the samples can support long-term use in nuclear waste management. This work provides a convenient and promising materials for the removal of U(VI) from polluted water.

The synergistic effect of GO (high surface area) and PD (abundant functional groups) leads to an effective uranium adsorption.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 482, 5 October 2015, Pages 258–266
نویسندگان
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