Analysis of soil washing effectiveness to remediate a brownfield polluted with pyrite ashes

Human health risk assessment in restoring safe and productive use of abandoned contaminated sites

“…2). The earlier research also revealed that the pyrite ash had contributed to introducing As, Pb, Cd, Cu and Hg into the natural soil in this study area (Sierra et al, 2010). Table 6 presents maximum and minimum PEF values calculated based on the percentage of sand and gravel fractions estimated for the Nitrastur soil.…”

“…The urban growth of Langreo is clearly conditioned by the proper redevelopment of this area and, therefore, several proposals have been carried out in recent years by local and regional administrations and land-owners, all of them being finally ruled out, mainly due to high costs of remediation. Regarding remediation alternatives, only some soil washing trials have been reported until now (Sierra et al, 2010). Following the preceding considerations, in this work three future land use patterns were initially outlined for further analyses and development, i.e., industrial, residential and recreational.…”

“…Taking into consideration the identified main contamination sources and the results of the previous investigations conducted at the site (Principado de Asturias, 2001;Sierra et al, 2010) the following contaminants were selected for risk assessment purposes: arsenic (As), cadmium (Cd), total chromium (Cr), 1 copper (Cu), Nickel (Ni), mercury as mercury salts (Hg), zinc (Zn) and lead (Pb). A total of 20 composite surface soil samples were collected in 2013, using a regular grid of 100 × 100 m (Fig.…”

Plant colonization of brownfield soil and post-washing sludge: effect of organic amendment and environmental conditions

“…As observed in numerous investigations carried out on industrial steelwork waste in the European Community, heavy elements are mainly trapped in the lattice of relatively insoluble mineral phases, and their leaching is unlikely to contribute metallic pollution to local groundwater, on a reasonable human timescale (Sierra et al 2013;Jordanova et al 2013). Therefore, the presence of a natural contribution to soil metal contamination (i.e.…”

Advances in Electrokinetic Remediation for the Removal of Organic Contaminants in Soils

“…Soil washing uses a solution in water to dissolve the contaminants from soil. Once the soil is clean, it can be stored in the same place and the contaminants will undergo a stabilization process [16]. Soil remediation technologies can be applied in situ, i.e.…”