Impact of salinity on MS-2 sorption in saturated sand columns-fate and transport modeling
Document Type
Article
Publication Date
1-1-2009
Abstract
This research investigated the sorption and transport of MS-2 in saturated sand under a wide range of salinities using one-dimensional column experiments. The salinity varied from 0 ppt (fresh water) to 30 ppt. The MS-2 in the fresh water showed very weak adsorption due to having the same negative charge as the sand. Increasing the salinity concentrations dramatically enhanced MS-2 adsorption. The MS-2 breakthrough revealed the existence of reversible and irreversible sorption sites in the sand. Salinity increased MS-2 attachment by compressing the double layers of MS-2 and reversible sorption sites. The salinity also changed some reversible sorption sites into irreversible sorption sites by reversing to positive surface charges of silica powder. An advection-dispersion-sorption model with a two-site reversible-irreversible kinetic sorption was developed to describe MS-2 breakthrough under different salinity conditions. The sorption parameters were estimated and their independence was evaluated by minimizing the total squared error of the MS-2 data. The proposed model showed good agreement with the experimental data for a wide range of salinity levels from fresh water to near seawater. The strong sorption shown in the MS-2 breakthrough at high salinity levels above 8 ppt was able to distinguish the proposed model from other sorption models. This study promotes the understanding of the viral sorption with salinity and provides a useful model for coastal management of viral migration in saline coastal groundwater. © 2009 ASCE.
Publication Source (Journal or Book title)
Journal of Environmental Engineering
First Page
1041
Last Page
1050
Recommended Citation
Cao, H., Tsai, F., & Rusch, K. (2009). Impact of salinity on MS-2 sorption in saturated sand columns-fate and transport modeling. Journal of Environmental Engineering, 135 (10), 1041-1050. https://doi.org/10.1061/(ASCE)0733-9372(2009)135:10(1041)