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Electrophoretic and Filtration Studies of a Florida Phosphate Slime.

Authors
Terichow-O; Sullivan-GV; Landis-EK
Source
NTIS: PB 242 621 :17 pages
Link
NIOSHTIC No.
10007613
Abstract
Electrophoretic mobility measurements were made by the Bureau of Mines on samples of a Florida phosphate slime to determine the optimum conditions of coagulation and settling in an aluminum sulfate solution. Addition of anthracite to promote mutual coagulation demonstrated the practicability of heterocoagulation by reduction of the repulsive effect of double layers. By proper selection of the electrolyte and its concentration, the reduction of the double layers to a net zero point of charge causes the predominance of van der waals' forces of attraction leading to the coagulation and rapid settling of both particle systems, as is predicted by the derjaguin-landau-verwey-overbeek theory of colloidal stability. Confirmation was found in the microfiltration tests in which a modified carman equation was applied to evaluate the specific filter bed resistance. Work done in cooperation with the University of Alabama.
Publication Date
19750101
Document Type
IH; Report of Investigation;
Fiscal Year
1975
NTIS Accession No.
PB-242621
NTIS Price
A03
Identifying No.
RI 8028
NIOSH Division
TURC;
Source Name
NTIS: PB 242 621
State
AL; FL;
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