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Coagulation of humic-kaolin-PACl aggregates
Journal
Water Science and Technology
Journal Volume
47
Journal Issue
1
Pages
145
End Page
152
Date Issued
2003
Author(s)
Abstract
Water treatment residual flocs are fractal-like aggregates made of many initial aggregates. We investigated in this study the coagulation dynamics for the humic-mineral-polyaluminium chloride (PACl) aggregates using small-angle light scattering techniques and the free-settling test. In contrast to reports in the literature, the presence of humic acid did not lead to a loose floc. Not only the time evolution of the coagulation dynamics, but also the final floc characteristics are only mildly affected by the humic acid. However, the strength of the formed floc does decline with humic acid, which leads to a turbid supernatant with high level of organics.
Subjects
Dynamics
Flocculation
Fractal dimension
Minerals
Size
Type
conference paper