title: A nanoremediation strategy for the recovery of an As-polluted soil.
abstract: The present study investigates the impact of the nanoremediation treatment on soil recovery as evaluated by the development of barley plants. Highly As-polluted brownfield soil was treated with nanoscale zero-valent iron (nZVI) commercial suspension at two doses (1% and 10%). Barley plants were cultivated in treated and untreated soils in a growth chamber, and the As, Fe, and nutrients uptake were determined. The efficacy of As immobilization was evaluated according to the toxicity characteristics leaching procedure (TCLP) as well as using a sequential extraction procedure. The application of nZVI reduced the amount of As in the more available fractions and increased the amount of As in the residual fraction. The best immobilization results were obtained for the highest dose of nZVI (10%). In turn, the lower availability of As in nZVI-treated soils, particularly at the dose of 10%, stimulated the development of the barley plants and decreased the As uptake. Neither an important increase of available Fe nor negative impact on soil physico-chemical and biological properties were observed. Thus, our results show that the use of nZVI could be an adequate strategy to recover the land use in As polluted soils.
authors: IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, Madrid, Spain. Electronic address: mar.gil.diaz@madrid.org.
authors: M
authors: M
authors: Gil-Díaz
authors: IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, Madrid, Spain.
authors: S
authors: S
authors: Diez-Pascual
authors: IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, Madrid, Spain.
authors: A
authors: A
authors: González
authors: IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, Madrid, Spain.
authors: J
authors: J
authors: Alonso
authors: Universidad de Oviedo, Mieres, Asturias, Spain.
authors: E
authors: E
authors: Rodríguez-Valdés
authors: Universidad de Oviedo, Mieres, Asturias, Spain.
authors: J R
authors: JR
authors: Gallego
authors: IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, Madrid, Spain.
authors: M C
authors: MC
authors: Lobo
mesh_terms: D001151:Arsenic / Q000032:analysis*; D004787:Environmental Pollution; D052918:Environmental Restoration and Remediation / Q000379:methods*; D001467:Hordeum; D007501:Iron / Q000737:chemistry; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D007501:Iron; D001151:Arsenic
keywords: Arsenic; Barley; Brownfield; Immobilization; Nanoscale zero valent iron (nZVI); TCLP