Rapid degradation of hexachlorobenzene by micron Ag/Fe bimetal particles

Enhanced dechlorination of 2,4-dichlorophenol by recoverable Ni/Fe–Fe 3 O 4 nanocomposites

“…In recent years, double-metal-catalyzed dechlorination materials have been developed, which greatly improve the dechlorination efficiency, and have been used to remediate water and soil contaminated by chlorinated pollutants, such as chlorinated hydrocarbons, chlorophenols, chlorobenzenes, polychlorinated biphenyls and other polychlorinated aromatics (Jovanovic et al, 2015;Liu et al, 2014;Wei et al, 2014;Yang et al, 2014). In these bimetallic materials, Fe, as a metal with low standard redox potential, is an electron donor and hydrogen donor to reduce the chlorinated organic compounds (Doong et al, 2003;Zhu et al, 2010), while the second metal (Ni, Pd, Cu, or Ag) with high standard redox potential, promotes the reactivity via hydrogenation and accelerating corrosion (DeVor et al, 2008;Nie et al, 2013;Wei et al, 2006;Zhang et al, 2009;Zhu et al, 2010), acting as a catalyst and accelerator. Among these materials, Pd/Fe has attracted a great deal of attention thanks to the low cost of Fe and excellent hydrogenation activity of Pd (Wei et al, 2006;Yan et al, 2010), but the cost of Pd greatly restricts the wide application of Pd/Fe catalysts.…”

Environmental application of millimeter-scale sponge iron (s-Fe0) particles (II): The effect of surface copper

“…Lowry and Johnson [14], for example, synthesized palladized microscale ZVI (mZVI) and demonstrated rapid dechlorination of polychlorinated biphenyls. Liu's group prepared Ag/Fe by plating Ag onto mZVI powder (300 mesh) to dechlorinate hexachlorobenzene (HCB) [15].…”

Nanoparticles for environmental clean-up: A review of potential risks and emerging solutions

“…Besides nZVI, agarose stabilized nZVIs and natural/synthetic goethite ZVI been applied successfully for removal of heavy metals from surface and subsurface water sources (Table 1). Similarly, bi-metallic nanoparticles Ag/Fe; Ni/Fe; Cu/Fe were applied for detoxification of water bodies from pollutants like heavy metals, hexachlorobenzenes, chlorinated and explosive compounds (Koutsospyros et al, 2012;Nie et al, 2013;Yan et al, 2010). Bimetallic core shell Fe/Ni and Fe/Pd Nps have been immobilized in Polyacrylic acid/ Polyvinylidene fluoride membrane matrix and used for the complete dechlorination of toxic chlorinated organic compounds (Xu and Bhattacharyya, 2005).…”