Mineralogy and Distribution of Cd, Ni, Cr, and Pb in Biosolids-Amended Soils From Castellón Province (NE, Spain)

Impact of controlled redox conditions on nickel in a serpentine soil

“…Low Ni concentrations were found associated with the exchangeable plus carbonate fraction that are considered as readily bio-available (Hseu 2006). Our findings are similar to previously reported Ni partitioning in both non-serpentine (Li et al 2007;Jordán et al 2009) and serpentine soils (Abollino et al 2002;Hseu 2006). Differently, Kierczak et al (2008) reported that Fe/Mn oxides represent primary mineral form to which Ni was associated in serpentine soil from Poland.…”

“…In the soil solution, Ni occurs as free ionic form (Ni 2+ ) and complexed form with organic and inorganic ligands (Reddy and DeLaune 2008). Approximately 50% of Ni in soils and sediments might be associated with the residual fraction and about 20% in the Fe/Mn oxides fraction, the rest might be attached to the carbonate fraction, and to the exchangeable and organic fractions (Pacifico et al 2007;Jordán et al 2009). Redox potential (E H ) and soil reaction (pH) are master variables controlling Ni dynamics, mobilities, and partitioning in soils.…”

Deposition of heavy metals from particulate settleable matter in soils of an industrialised area

“…As for the soil samples, the methodology used in their chemical analysis was described by Roca-Pérez et al (2010) and Jordán et al (2009) in their studies. Total contents of metals were determined by ICP-MS after microwave digestion of 0.5 g of representative soil sample (EPA, 1996).…”

“…The samples of soils were selected between the different samples collected in the papers of Roca-Pérez et al (2010) and Jordán et al (2009). Two kilograms of topsoil samples (0-20 cm) were collected from each sampling site, air-dried, crushed, 2 mm sieved, mixed and stored at air-dried conditions for further analysis.…”

“…1): Onda (S1), Alcora (S2) and Castellon (S3). The data were extracted from the papers of Roca-Pérez et al (2010) and Jordán et al (2009). The soils were selected because they are polluted soils as a result of agricultural activities and affected by dumping through industrial and urban activities.…”