کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
612028 880690 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interaction of colloidal particles of NH4+-montmorillonite with activated carbon
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Interaction of colloidal particles of NH4+-montmorillonite with activated carbon
چکیده انگلیسی

The interaction between negative colloidal particles of NH4+-montmorillonite and particles of activated carbon was studied as a function of particle concentration, pH, and time of contact. The results show that carbon particles act as a support/bridge for clay particles, the type of resulting clay/carbon/clay associations depending on the pH and the clay/carbon ratio in the system. The relation between clay and carbon particles can be described by equations of the Langmuir type. For the same carbon particle concentration in the system, the relation varies from 6820 to 36,100 and is dependent on pH. The interaction coefficients at pH 6.5 correspond to reaction of pseudo-first (k1=4.14×10−3k1=4.14×10−3 to 1.93×10−3 s−11.93×10−3 s−1) and pseudo-second order (k2=9.36×10−14k2=9.36×10−14 to 2.47×10−14 cm3s−1) for different clay/carbon ratios. By using the Dubinin–Radushkevich equation, the interaction energy (±22.42, ±685.0, and ±14.63 J mol−1) was obtained for three different pH values (5, 6.7, and 7.6), demonstrating that the reaction is mainly physical.

The interaction was studied between the negative colloidal particles of NH4+-montmorillonite and the particles of activated carbon as a function of particle concentration, pH, and time of contact. The results show that carbon particles act as a support/bridge to clay particles, the type of resulting clay/carbon/clay associations depending on the pH and the clay/carbon ratio in the system. The relation between clay and carbon particles can be described by equations of the Langmuir type.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 316, Issue 2, 15 December 2007, Pages 467–475
نویسندگان
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