کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
609936 880634 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, characterization of palygorskite supported zero-valent iron and its application for methylene blue adsorption
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Synthesis, characterization of palygorskite supported zero-valent iron and its application for methylene blue adsorption
چکیده انگلیسی

In this work, natural palygorskite impregnated with zero-valent iron (ZVI) was prepared and characterized. The combination of ZVI particles on surface of fibrous palygorskite can help to overcome the disadvantage of ultra-fine powders which may have strong tendency to agglomerate into larger particles, resulting in an adverse effect on both effective surface area and catalyst performance. There is a significant increase of methylene blue (MB) decolourized efficiency on acid treated palygorskite with ZVI grafted, within 5 min, the concentration of MB in the solution was decreased from 94 mg/L to around 20 mg/L and the equilibration was reached at about 30–60 min with only around 10 mg/L MB remained in solution. Changes in the surface and structure of prepared materials were characterized using X-ray diffraction (XRD), infrared (IR) spectroscopy, surface analysing and scanning electron microscopy (SEM) with element analysis and mapping. Comparing with zero-valent iron and palygorskite, the presence of zero-valent iron reactive species on the palygorskite surface strongly increases the decolourization capacity for methylene blue, and it is significant for providing novel modified clay catalyst materials for the removal of organic contaminants from waste water.

The effect of mixing time on the removal of methylene blue using zero-valent iron on palygorskite substrate.Figure optionsDownload high-quality image (67 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 341, Issue 1, 1 January 2010, Pages 153–161
نویسندگان
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