Remediating TNT-contaminated soil by soil washing and Fenton oxidation

Recovery of nitrotoluenes in wastewater by solvent extraction

“…Some literatures have been issued on the promoting destructive efficiency of 2,4,6-TNT using Fenton's reagent and visible light [13,14]. In addition, Oh et al [15] investigated oxidative degradation of 2,4,6-TNT utilizing Fenton's reagent and zero-valence iron, which functioned to reduce the nitro groups of 2,4,6-TNT to amino groups, resulting in higher destructive efficiency.…”

Application of surfactant Tween 80 to enhance Fenton oxidation of polycyclic aromatic hydrocarbons (PAHs) in soil pre-treated with Fenton reagents

“…These micelles lead to the increased pseudo-water-solubilities of hydrophobic organic compounds (HOCs), therebyincreasing the concentration gradient and mass transfer rates (Rosas et al, 2013). Many studies have observed that surfactants can facilitate the solubility and Fenton oxidation of HOCs (i.e., PAHs, TNT and p-Cresol) in soil (Li et al, 1997;Martens & Frankenberger, 1995;Rosas et al, 2013;Saxe et al, 2000;Wang, Hoag, Collins, & Naidu, 2013), and surfactants usually were introduced as a pre-treatment step before Fenton oxidation in these studies. However, there is a lack of knowledge about the potential of surfactant Tween 80 to enhance the Fenton oxidation of PAHs in aged soil pre-treated with Fenton reagents.…”

Solvent extraction and soil washing treatment of contaminated soils from wood preserving sites: Bench‐scale studies

“…The surfactants used in this study were selected from a list of candidates used for crude oil recoveiy. The effectiveness of surfactants for soil washing has been demonstrated on various contaminants including nitrobenzene (Chiu & Dural, 19971, inorganic arsenic-contaminated soil (Legiec at al., 19971, and TNT (Li et al, 1997). Examples of soil washing for heavy metal contaminated soils include chromium and lead contaminated soils (Pichtel & Pichtel, 19971, a n d lead contaminated soils with acid and ethylenediaminetetraacetic acid (EDTA) solutions (Davis & Hotha, 1998), Soil samples contaminated with pesticides were effectively washed with 3 percent and 5 percent nonionic detergent solutions consisting of a mixture of Igepal ICO-630 and Triton X-114 (Evdokimov & von Wandruszka, 1998;Koustas & Fischer, 1998).…”