Degradation of toxic halogenated organic compounds by iron-containing mono-, bi- and tri-metallic particles in water

Metallic iron for environmental remediation: A review of reviews

“…Fourteen (14) SCOPUSreferenced overview articles were selected (O'Hannesin and Gillham, 1998;Bigg and Judd, 2000;Scherer et al, 2000;Richardson and Nicklow, 2002;Henderson and Demond, 2007;Cundy et al, 2008;Noubactep, 2008;Thiruvenkatachari et al, 2008;Bartzas and Komnitsas, 2010;Li and Benson, 2010;Noubactep, 2011;Comba et al, 2011;Gheju, 2011) and the extent to which they were considered by the selected review articles considered (Table 3). From Table 2 it can be seen that the considered literature covered the period from 1894 to 2015, while the Fe 0 literature typically covered the period 1972 to 2015 (Colombo et al, 2015). In other words, it is likely, that the state-of-the-art knowledge of all aspects relevant for the design of Fe 0 filters is related in the 8 papers considered herein, whether univocally or controversially discussed.…”

“…The authors also discussed the use of additives and ultrasounds as tools to enhance system's efficiency for HOC degradation. Colombo et al (2015) stated explicitly that the review covered the literature from "from 1994 up to now, is not exhaustive, but allows the non-specialist to get into this specific field and to understand its great potentiality". Any critical evaluation is missing as the review started by accepting the reductive transformation concept introduced in 1994 without any allusion on the concerns which have been raised over the years (Warren et al, 1995;Lavine et al, 2001;Jiao et al, 2009).…”

Technologies for Decentralized Fluoride Removal: Testing Metallic Iron-based Filters

“…The complexity of processes in Fe 0 /H 2 O systems has led to the misconception that Fe 0 is a lone reducing agent [26,29,33,36,112,113]. This may explain why Fe 0 has not been widely tested for F´removal, i.e., the standard electrode potentials for fluoride (E 0 = 2.87 V, Equation (3)) and Fe 0 (E 0 = 0.44 V, Equation (4) There are two other important features of Fe 0 corrosion pathways that are essential for the process of contaminant removal: (i) the volume of each oxide (V oxide ) is larger than the volume of the parent metallic iron (V iron ) [88] and (ii) during the precipitation of oxides, contaminants can become enmeshed (i.e., physically sequestered) [107,108].…”

Enhancement of Degradation and Dechlorination of Trichloroethylene via Supporting Palladium/Iron Bimetallic Nanoparticles onto Mesoporous Silica

“…Bimetallic iron nanoparticles such as palladium/iron (Pd/Fe) and nickel-iron (Ni-Fe) nanoparticles have been proven to be effective in transforming chlorinated organic contaminants in groundwater or wastewater into innocuous or biodegradable compounds [1][2][3][4][5][6]. For example, catalytic dechlorination of aqueous trichloroethylene by Pd/Fe nanoparticles can be expressed by Equation (1).…”