Citation:

Xing, Y., A. Ellis, M. Magnuson, AND W. Harper. Adsorption of bacteriophage MS2 to colloids: Kinetics and particle interactions. Colloids and Surfaces A: Physicochemical and Engineering Aspects. Elsevier B.V., Amsterdam, Netherlands, 585:124099, (2020). https://doi.org/10.1016/j.colsurfa.2019.124099

Impact/Purpose:

Virus adsorption to colloidal particles is an important issue in the water quality community. Namely, if viruses can quickly and strongly associate to colloids, this can potentially lead to significant implications for management of biohazardous wastes at water resource recovery facilities. This research evaluated the adsorption of bacteriophage MS2 to colloidal suspensions of kaolinite (KAO) and fiberglass (FG). Observed pseudo first-order MS2 removal rate constants were much faster than previously reported values and were between 0.53 and 5.1 min-1 and between 2.4 and 3.5 min-1 for KAO and FG, respectively. Fluorescent and bright field microscopic images showed clusters of MS2 on and around the edges of the colloids, and the majority of the adsorbed MS2 was not readily removed during a vigorous wash step, suggesting a comparatively strong, operationally relevant association between the MS2 and both colloid types MS2 aggregation was also observed experimentally and was predicted on the basis of interaction energies calculated with XDLVO models.

Description:

Virus adsorption to colloidal particles is an important issue in the water quality community. Namely, if viruses can quickly and strongly associate to colloids, this can potentially lead to significant implications for management of biohazardous wastes at water resource recovery facilities. This research evaluated the adsorption of bacteriophage MS2 to colloidal suspensions of kaolinite (KAO) and fiberglass (FG). Observed pseudo first-order MS2 removal rate constants were much faster than previously reported values and were between 0.53 and 5.1 min-1 and between 2.4 and 3.5 min-1 for KAO and FG, respectively. Fluorescent and bright field microscopic images showed clusters of MS2 on and around the edges of the colloids, and the majority of the adsorbed MS2 was not readily removed during a vigorous wash step, suggesting a comparatively strong, operationally relevant association between the MS2 and both colloid types MS2 aggregation was also observed experimentally and was predicted on the basis of interaction energies calculated with XDLVO models.

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