
<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lin, S. H.</style></author><author><style face="normal" font="default" size="100%">Cheng, Y. W.</style></author><author><style face="normal" font="default" size="100%">Bobcombe, Y.</style></author><author><style face="normal" font="default" size="100%">Jones, K. L.</style></author><author><style face="normal" font="default" size="100%">Liu, J.</style></author><author><style face="normal" font="default" size="100%">Wiesner, M. R.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Deposition of Silver Nanoparticles in Geochemically Heterogeneous Porous Media: Predicting Affinity from Surface Composition Analysis</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental Science &amp; Technology</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Environ Sci Technol</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">colloid deposition</style></keyword><keyword><style  face="normal" font="default" size="100%">electrical double-layer</style></keyword><keyword><style  face="normal" font="default" size="100%">expressions</style></keyword><keyword><style  face="normal" font="default" size="100%">KINETICS</style></keyword><keyword><style  face="normal" font="default" size="100%">NANOMATERIALS</style></keyword><keyword><style  face="normal" font="default" size="100%">particle deposition</style></keyword><keyword><style  face="normal" font="default" size="100%">transport</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jun 15</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">&lt;Go to ISI&gt;://000291422200023</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">12</style></number><volume><style face="normal" font="default" size="100%">45</style></volume><pages><style face="normal" font="default" size="100%">5209-5215</style></pages><isbn><style face="normal" font="default" size="100%">0013-936X</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">The transport of uncoated silver nanoparticles (AgNPs) in a porous medium composed of silica glass beads modified with a partial coverage of iron oxide (hematite) was studied and compared to that in a porous medium composed of unmodified glass beads (GB). At a pH lower than the point of zero charge (PZC) of hematite, the affinity of AgNPs for a hematite-coated glass bead (FeO-GB) surface was significantly higher than that for an uncoated surface. There was a linear correlation between the average nanoparticle affinity for media composed of mixtures of FeO-GB and GB collectors and the relative composition of those media as quantified by the attachment efficiency over a range of mixing mass ratios of the two types of collectors, so that the average AgNPs affinity for these media is readily predicted from the mass (or surface) weighted average of affinities for each of the surface types. X-ray photoelectron spectroscopy (XPS) was used to quantify the composition of the collector surface as a basis for predicting the affinity between the nanoparticles for a heterogeneous collector surface. A correlation was also observed between the local abundances of AgNPs and FeO on the collector surface.</style></abstract><accession-num><style face="normal" font="default" size="100%">ISI:000291422200023</style></accession-num><notes><style face="normal" font="default" size="100%">774YHTimes Cited:0Cited References Count:27</style></notes><auth-address><style face="normal" font="default" size="100%">Wiesner, MRDuke Univ, Dept Civil &amp; Environm Engn, Pratt Sch Engn, Durham, NC 27708 USADuke Univ, Dept Civil &amp; Environm Engn, Pratt Sch Engn, Durham, NC 27708 USADuke Univ, Dept Civil &amp; Environm Engn, Pratt Sch Engn, Durham, NC 27708 USADuke Univ, Dept Chem, Durham, NC 27708 USAHoward Univ, Dept Chem Engn, Washington, DC 20059 USA</style></auth-address><label><style face="normal" font="default" size="100%">1</style></label></record></records></xml>