

@article {2667,
	title = {Iron oxide amended biosand filters for virus removal.},
	journal = {Water research},
	volume = {45},
	number = {15},
	year = {2011},
	pages = {4501-4510},
	abstract = {Laboratory studies were performed to determine if the addition of iron oxides throughout biosand filter {(BSF)} media would increase virus removal due to adsorption. The proposed mechanism is electrostatic adsorption of negatively charged virion particles to positively charged iron oxides formed during the corrosion of zerovalent iron. Initial tests conducted using continuous flow, small-scale glass columns showed high {MS2} bacteriophage removal in an iron-amended sand column (5log10) compared to a sand-only column (0.5log10) over 20 pore volumes. Additionally, two experiments with a column containing iron particles revealed 4log10 and 5log10 removal of rotavirus in the presence of 20 {mg/L} total organic carbon. Full-scale {BSFs} with iron particles removed\&gt;4log10 {MS2} for the duration of the experiment (287 days), while {BSF} with steel wool removed\&gt;4log10 {MS2} for the first 160 days. Plug flow for the {BSF} was shown to depend on uniformity between the iron oxide material and sand media grains. The results suggest that the duration of effective virus removal by iron-amended biosand filtration depends on source water conditions and the quantity and composition of iron material added. Overall, this study provides evidence that iron-amended {BSFs} may advance the field of point-of-use technologies and bring relief to millions of people suffering from waterborne diseases.},
	doi = {10.1016/j.watres.2011.05.045},
	url = {http://dx.doi.org/10.1016/j.watres.2011.05.045},
	author = {Bradley, Ian and Straub, Anthony and Maraccini, Peter and Markazi, Sheila and Nguyen, Thanh H}
}
