Sorption and desorption of Cd, Cr, Cu, Ni, Pb and Zn by a Fibric Histosol and its organo-mineral fraction

Sorption of Cu and Zn in low organic matter-soils as influenced by soil properties and by the degree of soil weathering

“…On the other hand, Fe oxides did not affect metal sorption, probably because other soil colloids were much more dominant in influencing sorption, as evidenced by the fact that Fe oxides R 2 value was the lowest among the other soil parameters that generated significant relationships. The same was observed by Covelo et al (2008), who found that Fe and Mn oxides did not affect metal sorption as much as other soil properties in the organo-mineral fraction of a Histosol, because other factors happened to be predominant in their study.…”

Mobility of Cr, Pb, Cd, Cu and Zn in a loamy sand soil: A comparative study

“…In addition, Zn and Cu are also present in high concentrations, along with lead (Pb), in roadside soils (Miller et al, 1989). These four metals, together with chromium (Cr), are frequently identified in wastes from several industrial activities including electroplating, car manufacturing, and metallurgy (Covelo et al, 2008;Lau and Stenstrom, 2005;USEPA, 2009). Thus, these five metals can be readily found as co-contaminants in agricultural lands as well as near roads and/or automotive facilities.…”

Using time of flight secondary ion mass spectrometry and field emission scanning electron microscopy with energy dispersive X-ray spectroscopy to determine the role of soil components in competitive copper and cadmium migration and fixation in soils

“…As a result of these irregularities, some isotherms did not fit the different empirical models, and the calculations for the sorption and retention capacity using the distribution coefficients K d (L kg −1 ), as proposed by different authors (Gomes et al, 2001;Covelo et al, 2008b), did not make it possible to clearly discriminate and compare the competitive sorption capacities.…”

“…In recent years, sorption processes have been studied (Sastre et al, 2006;Lair et al, 2007;Covelo et al, 2008b;Rees et al, 2014) in order to determine the influence of soil components on heavy metal fixation, mainly using statistical analysis such as linear regression and regression tree analyses (Covelo et al, 2008a;Vega et al, 2009b). However, little attention has been focused on providing information about the interactions between heavy metals and soil components using various techniques such as field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FE-SEM/EDS) and time of flight secondary ion mass spectrometry (TOF-SIMS) (Sipos et al, 2009;Cerqueira et al, 2011b).…”