<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Pham, A.L.-T.</style></author><author><style face="normal" font="default" size="100%">Doyle, F.M.</style></author><author><style face="normal" font="default" size="100%">Sedlak, D.L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Inhibitory effect of dissolved silica on H 2O 2 decomposition by iron(III) and manganese(IV) oxides: Implications for H 2O 2-based in situ chemical oxidation</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental Science &amp; Technology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">adsorption</style></keyword><keyword><style  face="normal" font="default" size="100%">Advanced Oxidation Processes</style></keyword><keyword><style  face="normal" font="default" size="100%">Amorphous iron</style></keyword><keyword><style  face="normal" font="default" size="100%">Article</style></keyword><keyword><style  face="normal" font="default" size="100%">bioremediation</style></keyword><keyword><style  face="normal" font="default" size="100%">catalysis</style></keyword><keyword><style  face="normal" font="default" size="100%">catalyst</style></keyword><keyword><style  face="normal" font="default" size="100%">Catalytic sites</style></keyword><keyword><style  face="normal" font="default" size="100%">Chemical</style></keyword><keyword><style  face="normal" font="default" size="100%">Chemicals removal (water treatment)</style></keyword><keyword><style  face="normal" font="default" size="100%">Clay minerals</style></keyword><keyword><style  face="normal" font="default" size="100%">concentration (composition)</style></keyword><keyword><style  face="normal" font="default" size="100%">controlled study</style></keyword><keyword><style  face="normal" font="default" size="100%">decomposition</style></keyword><keyword><style  face="normal" font="default" size="100%">Dissolution</style></keyword><keyword><style  face="normal" font="default" size="100%">dissolved load</style></keyword><keyword><style  face="normal" font="default" size="100%">Dissolved silica</style></keyword><keyword><style  face="normal" font="default" size="100%">Ferric Compounds</style></keyword><keyword><style  face="normal" font="default" size="100%">ferric hydroxide</style></keyword><keyword><style  face="normal" font="default" size="100%">ferric oxide</style></keyword><keyword><style  face="normal" font="default" size="100%">ground water</style></keyword><keyword><style  face="normal" font="default" size="100%">Groundwater</style></keyword><keyword><style  face="normal" font="default" size="100%">Hydrogen peroxide</style></keyword><keyword><style  face="normal" font="default" size="100%">hydroxyl group</style></keyword><keyword><style  face="normal" font="default" size="100%">hydroxyl radical</style></keyword><keyword><style  face="normal" font="default" size="100%">In-situ</style></keyword><keyword><style  face="normal" font="default" size="100%">inhibitor</style></keyword><keyword><style  face="normal" font="default" size="100%">Inhibitory effect</style></keyword><keyword><style  face="normal" font="default" size="100%">Iron</style></keyword><keyword><style  face="normal" font="default" size="100%">Iron compounds</style></keyword><keyword><style  face="normal" font="default" size="100%">Iron minerals</style></keyword><keyword><style  face="normal" font="default" size="100%">Iron ores</style></keyword><keyword><style  face="normal" font="default" size="100%">iron oxide</style></keyword><keyword><style  face="normal" font="default" size="100%">Iron oxides</style></keyword><keyword><style  face="normal" font="default" size="100%">Iron-coated sands</style></keyword><keyword><style  face="normal" font="default" size="100%">Loss rates</style></keyword><keyword><style  face="normal" font="default" size="100%">Manganese</style></keyword><keyword><style  face="normal" font="default" size="100%">Manganese Compounds</style></keyword><keyword><style  face="normal" font="default" size="100%">Manganese oxide</style></keyword><keyword><style  face="normal" font="default" size="100%">mineral</style></keyword><keyword><style  face="normal" font="default" size="100%">Minerals</style></keyword><keyword><style  face="normal" font="default" size="100%">montmorillonite</style></keyword><keyword><style  face="normal" font="default" size="100%">Natural waters</style></keyword><keyword><style  face="normal" font="default" size="100%">Oh yields</style></keyword><keyword><style  face="normal" font="default" size="100%">Organic Chemicals</style></keyword><keyword><style  face="normal" font="default" size="100%">Oxidation</style></keyword><keyword><style  face="normal" font="default" size="100%">oxidation kinetics</style></keyword><keyword><style  face="normal" font="default" size="100%">Oxidation-Reduction</style></keyword><keyword><style  face="normal" font="default" size="100%">oxide</style></keyword><keyword><style  face="normal" font="default" size="100%">Oxides</style></keyword><keyword><style  face="normal" font="default" size="100%">pH measurement</style></keyword><keyword><style  face="normal" font="default" size="100%">pH value</style></keyword><keyword><style  face="normal" font="default" size="100%">pollution effect</style></keyword><keyword><style  face="normal" font="default" size="100%">Remediation</style></keyword><keyword><style  face="normal" font="default" size="100%">sand</style></keyword><keyword><style  face="normal" font="default" size="100%">Silica</style></keyword><keyword><style  face="normal" font="default" size="100%">silicate</style></keyword><keyword><style  face="normal" font="default" size="100%">Silicon compounds</style></keyword><keyword><style  face="normal" font="default" size="100%">silicon dioxide</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil and groundwater remediation</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil Pollutants</style></keyword><keyword><style  face="normal" font="default" size="100%">soil treatment</style></keyword><keyword><style  face="normal" font="default" size="100%">Strong oxidants</style></keyword><keyword><style  face="normal" font="default" size="100%">Treatment systems</style></keyword><keyword><style  face="normal" font="default" size="100%">Utilization efficiency</style></keyword><keyword><style  face="normal" font="default" size="100%">Waste treatment</style></keyword><keyword><style  face="normal" font="default" size="100%">wastewater</style></keyword><keyword><style  face="normal" font="default" size="100%">water management</style></keyword><keyword><style  face="normal" font="default" size="100%">Water Pollutants</style></keyword><keyword><style  face="normal" font="default" size="100%">Water treatment</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2012</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84855926379&amp;doi=10.1021%2fes203612d&amp;partnerID=40&amp;md5=a448282acf793b86c9a95f87e5bd36b8</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">46</style></volume><pages><style face="normal" font="default" size="100%">1055-1062</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The decomposition of H 2O 2 on iron minerals can generate •OH, a strong oxidant that can transform a wide range of contaminants. This reaction is critical to In Situ Chemical Oxidation (ISCO) processes used for soil and groundwater remediation, as well as advanced oxidation processes employed in waste treatment systems. The presence of dissolved silica at concentrations comparable to those encountered in natural waters decreases the reactivity of iron minerals toward H 2O 2, because silica adsorbs onto the surface of iron minerals and alters catalytic sites. At circumneutral pH values, goethite, amorphous iron oxide, hematite, iron-coated sand, and montmorillonite that were pre-equilibrated with 0.05-1.5 mM SiO 2 were significantly less reactive toward H 2O 2 decomposition than their original counterparts, with the H 2O 2 loss rates inversely proportional to SiO 2 concentrations. In the goethite/H 2O 2 system, the overall •OH yield, defined as the percentage of decomposed H 2O 2 producing •OH, was almost halved in the presence of 1.5 mM SiO 2. Dissolved SiO 2 also slowed H 2O 2 decomposition on manganese(IV) oxide. The presence of dissolved SiO 2 results in greater persistence of H 2O 2 in groundwater and lower H 2O 2 utilization efficiency and should be considered in the design of H 2O 2-based treatment systems. © 2011 American Chemical Society.</style></abstract><notes><style face="normal" font="default" size="100%">cited By 44</style></notes></record></records></xml>