Publication detail

HLOUBKOVÉ PROFILY LABILNÍCH KOVOVÝCH SPECIES V SEDIMENTECH A JEJICH IN SITU MĚŘENÍ TECHNIKOU DIFUZNÍHO GRADIENTU V TENKÉM FILMU

Diviš, P., Dočekalová, H., Řezáčová, V.

Original Title

HLOUBKOVÉ PROFILY LABILNÍCH KOVOVÝCH SPECIES V SEDIMENTECH A JEJICH IN SITU MĚŘENÍ TECHNIKOU DIFUZNÍHO GRADIENTU V TENKÉM FILMU

English Title

IN SITU MEASUREMENT OF DEPTH PROFILES OF LABILE METAL SPECIES IN SEDIMENTS BY TECHNIQUE OF DIFFUSIVE GRADIENTS IN THIN FILMS

Type

journal article - other

Language

Czech

Original Abstract

The technique of diffusive gradients in thin films (DGT) presents a new approach in in-situ measurement of trace metal species in environmental systems. Using the DGT technique, trace metals are measured by their accumulation on a selective chelating resin after passage through a well-defined diffusive gel layer. The layer used in this work has an open structure that allows free diffusion of inorganic labile species and some organic metal complexes. Accumulated metals are subsequently analyzed after washing the resin layer with a known volume of acid solution by F AAS for major metals (Fe, Mn) and electrothermal AAS for trace metals (Cd, Pb). The depth profiles in an artificial lake sediment with 0.5 cm resolution for major and trace metals, obtained using two DGT units with different thickness of diffusive gel layer (0.4 and 1.2 mm) are discussed. Reliable depth profiles of trace metals in sediments are essential for studies of pollution, trace metal cycling and processes occurring in sediments.

English abstract

IN SITU MEASUREMENT OF DEPTH PROFILES OF LABILE METAL SPECIES IN SEDIMENTS BY TECHNIQUE OF DIFFUSIVE GRADIENTS IN THIN FILMS The technique of diffusive gradients in thin films (DGT) presents a new approach in in-situ measurement of trace metal species in environmental systems. Using the DGT technique, trace metals are measured by their accumulation on a selective chelating resin after passage through a well-defined diffusive gel layer. The layer used in this work has an open structure that allows free diffusion of inorganic labile species and some organic metal complexes. Accumulated metals are subsequently analyzed after washing the resin layer with a known volume of acid solution by F AAS for major metals (Fe, Mn) and electrothermal AAS for trace metals (Cd, Pb). The depth profiles in an artificial lake sediment with 0.5 cm resolution for major and trace metals, obtained using two DGT units with different thickness of diffusive gel layer (0.4 and 1.2 mm) are discussed. Reliable depth profiles of trace metals in sediments are essential for studies of pollution, trace metal cycling and processes occurring in sediments.

Key words in English

DGT, sediment, depth profiles, Mn, Fe, Cd, Pb, AAS

Authors

Diviš, P., Dočekalová, H., Řezáčová, V.

Released

1. 12. 2003

Publisher

ČSCH

Location

Praha

ISBN

0009-2770

Periodical

Chemické listy

Year of study

97

Number

12

State

Czech Republic

Pages from

1184

Pages to

1189

Pages count

5

URL

http://chemicke-listy.vscht.cz/

BibTex

@article{BUT41961,
  author="Pavel {Diviš} and Hana {Dočekalová} and Veronika {Řezáčová}",
  title="HLOUBKOVÉ PROFILY LABILNÍCH KOVOVÝCH SPECIES V SEDIMENTECH A JEJICH IN SITU MĚŘENÍ TECHNIKOU DIFUZNÍHO GRADIENTU V TENKÉM FILMU",
  journal="Chemické listy",
  year="2003",
  volume="97",
  number="12",
  pages="1184--1189",
  issn="0009-2770",
  url="http://chemicke-listy.vscht.cz/"
}