AI Article Synopsis
- The study assessed heavy metal contamination in Tisza River sediments using various methods, including sequential extraction and statistical analysis.
- The chemical analysis revealed different binding mechanisms for metals like Cu, Zn, and Pb in river sediments compared to tributaries, with Fe and Ni showing similar distributions due to natural influences.
- Enrichment factors indicated moderate pollution levels of Cu, Pb, and Zn in the Tisza, while tributaries remained largely unpolluted, suggesting that urban and industrial activities contribute to the heavy metal accumulation in the river sediments.
Article Abstract
In this study we have worked on the evaluation of heavy metal contamination in the sediments taken from the Tisza River and its tributaries, and thereby used the sequential extraction method, geochemical normalization, the calculation of the enrichment factor (EF), and the methods of statistical analysis. The chemical fractionation of Ni, Cu, Zn, Cr, Pb, Fe, and Mn, carried out by using the modified Tessier method, points to different substrates and binding mechanisms of Cu, Zn and Pb in sediments of the tributaries and sediments of the Tisza River. The similarities in the distributions of Fe and Ni in all types of sediments are the result of geochemical similarity as well as of the fact that natural sources mainly affect the concentration levels of these elements. The calculated enrichment factors (EF, measured metal vs. background concentrations) indicated that metal contamination (Cu, Pb, Zn and Cr) was recorded in the sediments of the Tisza River, while no indications of pollution were detected in the tributaries of the Tisza River and the surrounding pools. The maximum values of the EF were close to 6 for Cu and Pb (moderately severe enrichment) and close to 4.5 for Zn (indicating moderate enrichment). It can be said that the Tisza River is slightly to moderately severely polluted with Cu, Zn, and Pb, and minorly polluted with Cr. It is concluded that sediments of the Tisza serve as a repository for heavy metal accumulation from adjacent urban and industrial areas.
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| http://dx.doi.org/10.1016/j.jenvman.2009.05.013 | DOI Listing |
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