کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10377427 | 880729 | 2005 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental analysis of floc size distributions in a 1-L jar under different hydrodynamics and physicochemical conditions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Experimental analysis of floc size distributions in a 1-L jar under different hydrodynamics and physicochemical conditions Experimental analysis of floc size distributions in a 1-L jar under different hydrodynamics and physicochemical conditions](/preview/png/10377427.png)
چکیده انگلیسی
This study focuses on the relation among hydrodynamics, physicochemical conditions, and floc size. During ortho-kinetic flocculation, the floc size is controlled by a balance between hydrodynamic stress and aggregate strength. Special attention was paid to the influence of a hydrodynamic sequencing on both the aggregate strength and the flocculation processes. Experimental research was conducted in a 1-L jar for two different pH values. The hydrodynamic sequencing was made up of successive slow and rapid mixing periods, and different slow mixing intensities were studied. First, the large floc size was shown to decrease with increasing velocity gradient (G), with an expected trend (dâÉâ14). Then, the aggregate strength was shown to depend on two main factors: the flocculation history and the physicochemical conditions, which control the cohesion forces between primary particles. Finally, flocculation processes are discussed in terms of aggregation and breakup phenomena, with relation to local hydrodynamics and physicochemical conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 292, Issue 2, 15 December 2005, Pages 413-428
Journal: Journal of Colloid and Interface Science - Volume 292, Issue 2, 15 December 2005, Pages 413-428
نویسندگان
Denis Bouyer, Carole Coufort, Alain Liné, Zdravka Do-Quang,