Research Article
Apr 1978
Kinetic Model for Flocculation with Polymers
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VIEW THE REPLYAuthors: Peter M. Huck and Keith L. Murphy, M.ASCEAuthor Affiliations
Publication: Journal of the Environmental Engineering Division
Volume 104, Issue 4
Abstract
A kinetic model for flocculation with synthetic polymers has been developed and tested on systems containing precipitated heavy metal hydroxides. The rate of flocculation is shown to be second order in particle concentration and to decrease with time as adsorbed polymer loops become shorter. Floc breakup is exhibited above a definite energy level. Model parameters and particle aggregation rate are found to depend on metal species. The study indicates that flocculation should be accomplished in as short a time and therefore at as high a velocity gradient as possible, while remaining below the critical energy level for floc breakup. The new model was developed after a model discrimination and evaluation procedure showed existing kinetic flocculation models to be inadequate for the system under study. All models were evaluated in batch experiments performed on simulated mine drainage, which had undergone conventional lime neutralization. The new model is shown to be applicable to actual minewaters, and an example of its use to calculate required flocculation time is provided.
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Published In
Journal of the Environmental Engineering Division
Volume 104 • Issue 4 • April 1978
Pages: 767 - 784
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Apr 1978
Published online: Feb 11, 2021
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Authors
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Peter M. Huck
Process Engr. IEC International Environmental Consultants Ltd., Islington, Ontario, Canada; formerly, Asst. Prof., Dept. of Chemical Engrg., McMaster Univ., Hamilton, Ontario, Canada
Keith L. Murphy, M.ASCE
Prof., Dept. of Chemical Engrg., McMaster Univ., Hamilton, Ontario, Canada
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.