The extended DLVO theory was applied to study the mechanism of algal flocculation with clays. Montmorillonite-K10, montmorillonite-KSF, kaolinite, and loess were used as the model clays whereas Microcystis sp. and Prorocentrum minimum were used as the model freshwater algae and marine algae, respectively. Montmorillonite-KSF showed the highest flocculation efficiency not only for Microcystis sp. especially at pH 7 but also for P. minimum. From the application of the extended DLVO theory, the electrostatic and the Lewis acid-base interactions were found to be the dominant mechanisms for the flocculation of Microcystis sp. in freshwater and P. minimum in seawater, respectively.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)