Influence of population density on the concentration and speciation of metals in the soil and street dust from urban areas

nfluence of Metals In Soil on The Comparative Phyto chemical Characterization and Antioxidant Study of Indian Golden Shower (Cassia Fistula)

“…This further confirm the hypothesis that DTPA extractable metals and first three fraction of metals through sequential extraction release only the weakly bound elements present in soil structure. Acosta et al, (2015), 43 also reported a highly significant correlation between the DTPA-extractable contents and the labile fraction of trace elements. To support this hypothesis, Karak et al (2011) 13 concluded that DTPA might be used to estimate the mobile element fraction, instead of the more costly and time consuming sequential extractions even though sequential extractions give a more informative picture of metal partitioning among different phases.…”

Chemical and biological methods to evaluate the availability of heavy metals in soils of the Siena urban area (Italy)

“…Cu concentrations were 1.4-3.4 mg kg − 1 in F red (9% of Cu tot ), 1.9-2.5 mg kg − 1 in F oxi (8%), 0.14-0.2 mg kg − 1 in F ext (0.6%) and 0.06-0.1 mg kg −1 in F sol (0.3%). Cu fractionation in uncontaminated soils of the Siena urban area matched the usual distribution of this element in soil fractions, characterized by a prevalent association with the immobile F res and subordinately with F oxi and F red (Acosta et al, 2015). This observation suggests that Cu has an equivalent affinity for adsorption by organic matter and Fe-Mn oxyhydroxides (Impellitteri et al, 2002;Kabata-Pendias, 2010).…”

“…Imperato et al, 2003;Acosta et al, 2011;Sun et al, 2010). To our knowledge, few studies have focused on the fractionation and mobility of heavy metals in contaminated urban soils (Burt et al, 2014;Acosta et al, 2015;Gu et al, 2016), and even less their availability in soil and transfer to earthworms (Pizl and Josens, 1995;Kennette et al, 2002;Nannoni et al, 2011).…”

Lead Exposure and Environmental Health

“…The results of numerous studies have shown that street dust and soil samples from the urban and industrial area represents a source of compounds with potential health risk (Calvillo et al, 2015). Street dust contained significant levels of the heavy metals (Christoforidisa and Stamatis, 2009;Lu et al, 2014;Acosta et al, 2015) and lead is present in high concentration (Zhou et al, 2015). The data for Pb seem to prove that the gradual shift from leaded to unleaded petrol as fuel for automobiles has resulted in an almost proportional reduction in the concentration of Pb in dust particles under 100 μm (Zhao et al, 2015).…”