Influence of Pollution Level on Heavy Metals Mobility in Soil From Nw Romania

Abstract

To assess the influence of pollution degree on the heavy metals (Cu, Cd, Zn, Pb) mobility in soil, total metals content obtained by extraction in aqua regia and extractable contents in a buffered diethylenetriaminepentaacetic acid (DTPA) solution were measured using inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS). Soil samples were collected from two areas from NW Romania with different pollution levels: a mining area (Baia Mare) and a rural area (Iclod). High pollution level with heavy metals was found in Baia Mare area, whereas contents of metals in Iclod did not exceed the alert limits established by Romanian legislation. The percentages of extractable metals were calculated, and correlations between soils pollution levels and heavy metals mobility were made. The results showed that despite the significant difference between the total metal content in soil from the two regions, estimated as the aqua regia extractable content, the percentages of DTPA extractable metals were comparable for Pb and Zn, while those for Cu and Cd were higher in the polluted region. However, significant correlation coefficients were found between total and mobilisable metals content in unpolluted site compared to the polluted site.

Mercury in soil and perennial plants in a mining-affected urban area from Northwestern Romania

“…[17,18] Non-ferrous metals (Pb, Cu, Au, Ag, Zn) were extracted and processed in Baia Mare region, Northwestern Romania since ancient times, leading to a historical pollution with Pb, Cu, Zn, Cd and As. [19] The smelting of non-ferrous metals is known as a source of Hg emission, due to the presence of Hg both in minerals and in the coal used in the smelting processes. [20] However, no data was found in the literature regarding Hg levels in the Baia Mare area, probably due to the special methodology required for its determination from solid samples.…”

Assessment of metals bioavailability to vegetables under field conditions using DGT, single extractions and multivariate statistics

“…The soil quality guidelines are usually based on total metal content, although it is generally accepted that total metal content include both bioavailable and non-bioavailable fractions [4]. The estimation of bioavailable metal fractions is, generally, based on single or sequential extraction procedures [5,6], but these provide only a classification of metal fractions in the soil compartments. Additionally, in the pretreatment stage of these procedures, the physical–chemical equilibrium in soil may be affected [7].…”

A Comparative Study between Three Aquatic Plants to Phytoremediation of Lead from Wastewater

“…Proper dilutions needed for wastewater with three replicates for each dilution, which was (25% -50% -100%) of sewage water have been added to the tubs with dimensions of 20 * 20 * 30 cm experience which nine 4-liter, and put the plants in the basin after the measure concentrations of heavy metals in the leaves and roots and then make the necessary measurement determined by atomic spectrometer Flame steps Flame atomic Absorption Spectrophotometer type (VGP 210 Buck, England) depending on (Senila et al, 2011) …”