Risk assessment of heavy metal contamination in Danube sediments from Hungary

K. Gruiz, A. Murányi, M. Molnár, B. Horváth

Research output: Contribution to journalConference article

16 Citations (Scopus)

Abstract

The aim of the current research is to establish a suitable Environmental Risk Assessment (ERA) scheme for Danube sediments in Hungary by determining contaminants' concentrations by chemical analysis and by assessing their ecotoxicological effects. Seventeen sedimentation sites were identified, mainly upstream of Budapest, between river kilometres 1811 and 1586. The heavy metal contents and basic properties of sediments were determined. Excess heavy metal content was used to characterize the extent of heavy metal contamination. Direct contact biotests were developed for testing the toxic effect of contaminated sediments. Ecotoxicological effects were measured by three bacterial tests and one plant bioassay. Effect Concentrations were determined by the inhibition of the bioluminescence of Photobacterium phosphoreum. The resultant inhibition of different partial toxic effects was characterized by Cu equivalent. Chemical and ecotoxicological results were studied together, making it possible to characterize the extent of the pollution and its biological effects at the same time. It was concluded that combined chemical and ecotoxicological characterization of contaminated sediments may serve as a strong basis for assessing the site-specific risk of heavy metal pollution.

Original languageEnglish
Pages (from-to)273-281
Number of pages9
JournalWater Science and Technology
Volume37
Issue number6-7
DOIs
Publication statusPublished - Jun 25 1998
EventProceedings of the 1997 2nd IAWQ Specialist Group Conference on Contaminated Sediments - Rotterdam, Neth
Duration: Sep 7 1997Sep 11 1997

Keywords

  • Danube sediments
  • Ecotoxicological tests
  • Environmental risk assessment
  • Heavy metal contamination
  • Sediment quality
  • Surface water monitoring

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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