Synthesis, Characterization, and Coagulation of Polymeric Ferric Sulfate
Publication: Journal of Environmental Engineering
Volume 128, Issue 6
Abstract
This paper proposes a new approach to synthesize polymeric ferric sulfate (PFS). It was found that the basicity and stability of the synthesized PFS varied with the quantity of sulfuric acid used. The minimum amount of sulfuric acid needed for the synthesis of PFS to insure a residual concentration in the product lower than 0.1 wt% is about 31.0 wt% of the stoichiometric requirement. However, to produce a stable product which can be stored for six months, the amount of sulfuric acid should be 51.7 and 62.0 wt% of the stoichiometric requirement for PFS produced at 55 and 85°C, respectively. The structure of PFS depended on the synthesis temperature, as observed through x-ray diffraction and transmission electron microscopy. A comparison of the coagulation performance of PFS and ferric sulfate (FS) showed that PFS is, in general, more effective than FS in reducing the turbidity of Kaolinite suspensions for various conditions.
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Information
Published In
Journal of Environmental Engineering
Volume 128 • Issue 6 • June 2002
Pages: 483 - 490
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Dec 27, 2000
Accepted: Oct 25, 2001
Published online: May 15, 2002
Published in print: Jun 2002
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