naa a22 4500 510752888 CHVBK 20180411083111.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11270-013-1780-1 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1780-1 Treatment of a Trichloroethylene Source Zone using Persulfate Activated by an Emplaced Nano-Pd-Fe0 Zone [Elektronische Daten] [Mohammed Al-Shamsi, Neil Thomson] Recently, metal nanoparticles have attracted attention as promising peroxygen activators for the rapid and effective remediation of organic contaminants. In this work, a one-dimensional physical model experiment was designed to investigate the mobility of the metal nanoparticles in porous media and the potential use of metal nanoparticles as peroxygen activators for in situ treatment of source zones. We found that our synthesized nano-Pd-Fe0 particles were mobile in a non-geological porous medium and relatively immobile in a geological porous medium. In addition, we observed that iron-based bimetallic nanoparticles were able to remain in suspension in an ideal aqueous system much longer (>6weeks) than iron-based monometallic nanoparticles (<1h). To overcome the nano-Pd-Fe0 particle delivery issue in geological porous media, an activation zone approach was adopted. Nano-Pd-Fe0 particles were injected in order to create a zone to activate persulfate for the treatment of a trichloroethylene source zone. Trichloroethylene mass destruction was only 9% higher in the nano-Pd-Fe0 activated persulfate system compared to the non-activated persulfate system as revealed by a short-duration chloride concentration spike in the effluent. In addition, the nano-Pd-Fe0 activation zone was rapidly deactivated after being exposed to persulfate as visually observed by a color change, indicating that the longevity of the activation zone is limited. Springer Science+Business Media Dordrecht, 2013 In situ remediation nationallicence Nano-Pd-Fe0 nationallicence Persulfate nationallicence Activation zone nationallicence Trichloroethylene nationallicence Al-Shamsi Mohammed Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, Ontario, Canada aut Thomson Neil Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, Ontario, Canada aut Water, Air, & Soil Pollution Springer Netherlands 224/11(2013-11-01), 1-12 0049-6979 224:11<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1780-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1780-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Al-Shamsi Mohammed Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, Ontario, Canada aut NATIONALLICENCE 700 1- Thomson Neil Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, Ontario, Canada aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/11(2013-11-01), 1-12 0049-6979 224:11<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer