Transport and deposition of Suwannee River Humic Acid/Natural Organic Matter formed silver nanoparticles on silica matrices: The influence of solution pH and ionic strength

► Transport and deposition of SRHA- and SRNOM-formed AgNPs utilizing silica column. ► Determination of percentage conversion of initial Ag+ concentration to AgNPs. ► AgNP transport increased with basic pH conditions and low ionic strength. ► Potential for AgNP contamination of subsurface soils and groundwater aquifers.