Characterization of anthropogenic sediment particles after a transboundary water pollution of river Tisza using synchrotron radiation

János Osán, Szabina Török, Bálint Alföldy, Gerald Falkenberg

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

At the beginning of 2000, a major mining accident occurred in the Romanian part of the Tisza catchment area due to tailings dam failure releasing huge amounts of heavy metals to the river. Sediment samples were taken from the main riverbed at six sites in Hungary, on March 16, 2000. The objective of this work was to characterize the anthropogenic particles in river sediment previously selected by single-particle electron probe X-ray microanalysis (EPMA). The trace element composition, heterogeneity and heavy metal speciation of individual particles was studied using synchrotron radiation-based microbeam X-ray emission and absorption methods. Particles were selected only from samples regarded as polluted sediment. White-beam micro X-ray fluorescence (μ-XRF) allowed the quantitative determination of heavy metals such as cadmium in individual particles. The maximum observed concentration of cadmium (> 700 μg/g) indicates that this highly toxic heavy metal is concentrated in individual anthropogenic particles. Using the combination of micro X-ray absorption near-edge structure and target-transformation principle component analysis, quantitative chemical speciation of copper and zinc was feasible on individual sediment particles. Heavy metals in most of the particles released from the pollution site remained in the sulfide form resulting in a limited mobility of these metals. Based on the information obtained using microanalytical methods, the estimation of the environmental mobility of heavy metals connected to microparticles becomes possible.

Original languageEnglish
Pages (from-to)701-708
Number of pages8
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume59
Issue number5
DOIs
Publication statusPublished - May 21 2004

Keywords

  • Chemical speciation
  • Micro-X-ray absorption near-edge structure
  • Micro-X-ray fluorescence
  • River sediment

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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