A preliminary investigation on the distribution of heavy metals in surface sediments of the Cona tidal marsh (Venice Lagoon)

Bernardi, Silvia; Costa, F.; Vazzoler, S.; Zonta, Roberto; Cecchi, Rodolfo; Ghermandi, Grazia

doi:10.1007/bf02507009

Cited by 10 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…-1 for Zn. All these data suggest that heavy metal mass fractions measured in the Plomin Bay sediments kept within in the ranges reported for other relatively unpolluted localities of the Northern Adriatic Sea (5,7,(13)(14)(15)(16)(17)(18)(19).…”

Section: Granulometric and Chemical Compositionsupporting

confidence: 76%

“…Heavy metal mass fractions in sediment samples from the investigated area exhibited values lower or equal to those reported for relatively unpolluted regions of the Adriatic Sea (5,(13)(14)(15)(16)(17)(18)(19). Granulometric and chemical composition of the dredged material was highly homogeneous, exhibiting no signifi cant difference between layers.…”

Section: Resultsmentioning

confidence: 63%

See 1 more Smart Citation

Chemical Profile of Plomin Bay Sediments

Oreščanin¹,

Nađ

Bartolinčić³

et al. 2009

Archives of Industrial Hygiene and Toxicology

View full text Add to dashboard Cite

Granulometric, chemical, and leaching properties of sediments dredged in the Plomin Bay (Northern Adriatic Sea, Croatia) were investigated in order to asses the risk of remobilisation of heavy metals into the water column. In total 65 samples from 65 sampling sites were taken from different sediment depths within the bay. Analysis of variance confi rmed the homogeneity of granulometric and elemental composition of the investigated sediment throughout its volume. Granulometric analysis showed that all samples corresponded to a pelitic fraction (<0.063 mm). Bulk elemental mass fractions in the sediments were similar to literature data on relatively unpolluted areas of the Adriatic Sea. High sedimentation rate caused by constant infl ow of material from the Boljunčica River drainage may be responsible for low levels of heavy metals and negligible infl uence of fl y and bottom ash from a nearby disposal site on the chemical composition of the sediments. In contact with sea water only 0.29 mg kg -1 of V, 0.04 mg kg -1 of Cr, 0.07 mg kg -1 of Ni, 0.33 mg kg -1 of Cu, 0.67 mg kg -1 of Zn and 0.06 mg kg -1 of Pb could be remobilised from sediment material into the water column. However, these values increased three to ten times in case of leaching with organic acids.

show abstract

Section: Granulometric and Chemical Compositionsupporting

confidence: 76%

Section: Resultsmentioning

confidence: 63%

Chemical Profile of Plomin Bay Sediments

Oreščanin¹,

Nađ

Bartolinčić³

et al. 2009

Archives of Industrial Hygiene and Toxicology

View full text Add to dashboard Cite

show abstract

“…Some procedures are especially suited to the extraction of the non-lattice-held fraction from sediment samples (Bernardi et al 1988). The resulting liquid specimens are preconcentrated as Na DDTC and APDC carbamate on Nuclepore filters, using the procedure previously described for waters.…”

Section: Chapter 19 • Pixe Analysis For Trace Elements In Marine Envimentioning

confidence: 99%

“…The fine-grained fractions (that are the main carriers of metals among sediment grain sizes) are transferred far from the mouth (Bernardi et al 1988). In addition a part of the pollutant load may be remobilized from bottom sediments (given external factors that induce turbulence) reaching the water column again.…”

Section: Trace Element Distribution In Surface Bottom Sedimentmentioning

confidence: 99%

Chemical Processes in Marine Environments

Gianguzza¹,

Pelizzetti²,

Sammartano³

2000

View full text Add to dashboard Cite

Proton‐InducedX‐Ray Emission in Environmental Analysis

Ghermandi

2000

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

Particle‐induced X‐ray emission (PIXE) is an analytical method based upon X‐ray spectrometry. In the vast majority of applications, a proton beam is used to eject inner‐shell electrons from atoms in a solid specimen (target). When the resulting vacancies are filled by outer‐shell electrons, characteristic X‐rays whose energies identify the particular atom are emitted. Proton PIXE is performed by a small particle accelerator (the most widely used is the Van de Graaff machine at a 2–3 MV voltage, more recently also small tandem accelerators), that provides a beam of protons. The beam emerging from the accelerator, stabilized and directed by electrostatic and magnetic steering elements in a high vacuum line, enters the specimen chamber through suitable collimators. The X‐ray detection system, housed in the chamber, is generally a Si(Li) device, that combines the advantage of high efficiency in the X‐ray energy region of interest (usually 2–20 keV) with a good energy resolution. A typical PIXE spectrum consists of characteristic X‐ray peaks superimposed on a background due to bremsstrahlung radiations and nuclear reactions induced by the beam. The area of each peak is related directly to the concentration of the corresponding element in the specimen. Various software codes have been developed to deconvolute spectra and to accurately calculate peak areas. PIXE intrinsic detection limit (DL) is not very much below 1 ppm (mg kg −1 ) in a given matrix. It offers its maximum sensitivity in two atomic number (Z) regions: 20 < Z < 35 and 75 < Z < 85. Measurement errors are in the order of 10%, depending mainly on the target preparation procedure and on the slight variability of the proton flux. The PIXE technique allows fast (few minutes), nondestructive, highly sensitive simultaneous determinations of a wide group of elements (12 ≤ Z ≤ 85), without large variations in sensitivity among different elements. The total element concentration is measured by PIXE, independent of different oxidation states. Adequate sample preparation procedures may be required in environmental PIXE applications since solid targets have to be exposed to the particle beam. Thin targets are preferable, in order to minimize matrix effects. For thin samples and for light‐element matrices, PIXE has superior sensitivity compared to X‐ray fluorescence (XRF). In heavy‐element matrices XRF is preferable. DLs for inductively coupled plasma atomic emission spectroscopy (ICPAES) may be lower than for PIXE (depending on the sample dilution factor), but the topic of interferences is much more complex for ICPAES than for PIXE.

show abstract

A preliminary investigation on the distribution of heavy metals in surface sediments of the Cona tidal marsh (Venice Lagoon)

Cited by 10 publications

References 8 publications

Chemical Profile of Plomin Bay Sediments

Chemical Profile of Plomin Bay Sediments

Chemical Processes in Marine Environments

Proton‐InducedX‐Ray Emission in Environmental Analysis

Contact Info

Product

Resources

About