Influence of soil washing with a chelator on subsequent chemical immobilization of heavy metals in a contaminated soil

Role of organic amendments on enhanced bioremediation of heavy metal(loid) contaminated soils

“…Recently, ethylenediamine disuccinate (EDDS) has been identified as a promising biodegradable alternative for persistent compounds such as EDTA for application in enhancing the mobilization of heavy metals [196]. The mobilized metal(loid)s are subsequently removed either through soil washing [197,198] or plant uptake (i.e. phytoremediation) [199,200].…”

Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals

“…DTPA-extractable Cd, Cu, Pb and Zn decreased from 2.3 to 2.0 mg kg À1 , from 54 to 43 mg kg À1 , from 69 to 53 mg kg À1 and from 52 to 47 mg kg À1 , respectively. Phosphate is a common amendment to immobilize heavy metals in soils and also provide P as a nutrient (Cao et al, 2003;Chen et al, 2006;Zhang et al, 2010b;Zupancic et al, 2012). Therefore, the subsequent amendment of CaMgP in the leached soils was a useful choice to further immobilize residual metals.…”

The application of soil washing for treatment of polycyclic aromatic hydrocarbons contaminated soil: A case study in a petrochemical complex

“…This method is an innovative treatment technology that uses liquids and a mechanical process to scrub soils, removing hazardous contaminants, and concentrating the contaminants into a smaller volume . Soil washing is to transfer contaminants from the soil solid phase to the aqueous phase by dissolving or suspending them with some chelating agents or acid solutions, or to concentrate them into a small volume of soil via separating them from sand fractions . Surfactant enhanced ex situ soil washing can offer the convenience, efficiency and economy desirable for innovative and alternative soil washing technologies .…”