Remediation of a Biodiesel Blend-Contaminated Soil with Activated Persulfate by Different Sources of Iron

Use of different kinds of persulfate activation with iron for the remediation of a PAH-contaminated soil

“…(4). In this sense, some works have reported this behavior, confirming that better results have been obtained with the use of nZVI against Fe 2 + as persulfate activator, for the removal of a biodiesel-blend from a contaminated soil (Pardo et al, 2015), TCE (Al-Shamsi and Thomson, 2013) or 2,4-dichlorophenol (Li et al, 2015). As can be seen in Fig.…”

“…All remediation runs were carried out in duplicate. The non-productive consumption of oxidant (NPC) in this soil was studied in a previous work (Pardo et al, 2015) finding that about 20% of the oxidant was consumed after 83 days and 10% of initial PS was remaining after 20 days. Oxidation runs carried out are summarized in Table 1.…”

Fate of iron and polycyclic aromatic hydrocarbons during the remediation of a contaminated soil using iron-activated persulfate: A column study

“…Given the reactivity due to its reducing potential, it has been reported the effectiveness of nZVI as reducing agent for certain pollutants, like chlorinated hydrocarbons (Kober et al, 2014;Kocur et al, 2014), as well as an efficient PS activator for the degradation of aliphatic hydrocarbons (e.g. Diesel) or PAH (Pardo et al, 2015b;Peluffo et al, 2015). In accordance to literature, the vast majority of the studies that have assessed the use of activated PS for the remediation of hydrocarbon contaminated soils have been carried out from batch experiments.…”

“…(7), a slow release of Fe 2+ to the media has been proposed (Vicente et al, 2011), which can be also achieved by using zerovalent iron (ZVI) (Rodriguez et al, 2014). Indeed, it has been reported higher removal efficiencies of pollutants when activation was due to ZVI, either in the form of granular, micro or nanoparticles, than Fe 2+ (Oh and Shin, 2014;Pardo et al, 2015b;Rodriguez et al, 2014). Despite the benefits of ZVI, the difficulties derived from the injection of granular particles or powder, which make its application unsuitable, have led to the development of nanoparticles of zerovalent iron or nanoscale particles of zerovalent iron (nZVI).…”

Remediation of soil contaminated by PAHs and TPH using alkaline activated persulfate enhanced by surfactant addition at flow conditions

“…The most commonly used oxidants in ISCO are permanganate, ozone and Fenton's reagent . However, the application of sodium persulfate (PS) as an alternative to these oxidants has increased over the last decades , . Some properties, such as ease of handling, high aqueous solubility, high stability, relatively low cost, longer lifetime in the subsurface than hydrogen peroxide, and production of benign end products, characterize this compound, providing it with a competitive advantage over other oxidants …”