کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
613686 880726 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature effect on the stability of bentonite colloids in water
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Temperature effect on the stability of bentonite colloids in water
چکیده انگلیسی

The stability of natural bentonite suspensions has been investigated as a function of temperature at pH 9 and ionic strength 10−3 M. The sedimentation rate of the particles is directly related to their stability. The sedimentation kinetics was determined by examining the variation of particle concentration in solution with time. The observed kinetics for sedimentation is discussed quantitatively in terms of the potential energy between particles. The ζ-potential of the particles was measured and the DLVO theory was used to calculate attractive and repulsive potentials. Experimental observations are consistent with DLVO model predictions and show that the stability of bentonite colloids increases with temperature. Differences with other colloidal systems can be attributed to the temperature dependence of the surface charge of bentonite particles.

The stability of bentonite colloids was found to increase with increasing temperature.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 298, Issue 2, 15 June 2006, Pages 694–705
نویسندگان
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