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Electroflocculation: the Effect of Zeta-potential on Particle Size by E. Ofir; Y. Oren; A. Adin is a Environmental Science article available to read on EtoBox.

What is Electroflocculation: the Effect of Zeta-potential on Particle Size about?

Electroflocculation (EF) of wastewater or water for reuse with colloidal particles, such as kaolin and iron with the right pH, might be optimal for aggregation during water treatment. In this paper, the EF process was compared to chemical flocculation (CF) through ζ-potential and particle size parameters. The results demonstrate that the particle became larger, except in the case of pH 4, where, after 50 min of flocculation, there was a jump in the value and the particle attained a diameter of more than 800 nm. Throughout the entire flocculation time, the ζ-potential values indicated a stronger negative charge on the particle. Basically, there was a gradual rise in absolute ζ-potential with the increase in particle size. The reason for this behavior can be explained by the solubility of kaolin with a decreasing ionic strength, when certain iron ions are released from the electrode and the charge of the particle is altered. The aggregation process, whereby a few small particles with a negatively-charged surface are rendered into a larger-sized particle, results in a larger total negative charge. It has long been recognized that ζ-potential is a very good index of the magnitude of th

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Author

E. Ofir; Y. Oren; A. Adin

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0011-9164)

Published

2007

Language

EN

Field

Environmental Science (Physical Sciences)