An assessment of the concentrations of PCDDs/Fs in contaminated bottom sediments and their sources and ecological risk

Agnieszka Baran , Monika Mierzwa-Hersztek , Magdalena Urbaniak , Krzysztof Gondek , Marek Tarnawski , Magdalena Szara , Marek Zieliński

Abstract

Purpose The purpose of the study was to determine the levels of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/F), two types of persistent organic pollutant (POP), in an urban retention reservoir located in an industrial zone within a coal-mining region. It also assesses the potential ecological risk of the PCDDs/Fs present in bottom sediments and the relationship between their content and the fraction of organic matter. Materials and methods The sediment samples were collected from Rybnik Reservoir, located in the centre of the Rybnik Coal Region, Silesia, one of Poland’s major industrial centres. Seventeen PCDD/F congeners in the surface of the sediments were analysed using high-resolution gas chromatography and high-resolution mass spectrometry (HRGC/HRMS). Results and discussion The toxic equivalency (TEQ) of the PCDDs/Fs in the sediments ranged from 1.65 to 32.68 pg TEQ g−1 . PCDDs constituted 59–78% of the total PCDDs/Fs, while the PCDFs accounted for 22–41%. The pattern of PCDD/F congeners in the sediments was dominated by OCDD. However, the second-most prevalent constituents were OCDF and ∑HpCDFs in the low TOC sediment (< 10 g TOC kg−1 ), but HpCDD in the rich TOC samples (> 10 g TOC kg−1 ). PCDD/F concentrations in the sediment samples were 2- to 38-fold higher than the sediment quality guidelines limit, indicating high ecological risk potential. Although a considerable proportion of PCDDs/Fs in the bottom sediments from the Rybnik Reservoir were derived from combustion processes, they were also obtained via transport, wastewater discharge, high-temperature processes and thermal electricity generation. The PCDD/F concentrations were significantly correlated with all fractions of organic matter; however, the strongest correlation coefficients were found between PCDDs/Fs and humic substances. Besides organic matter, the proportions of silt/clay fractions within sediments played an important role in the transport of PCDDs/Fs in bottom sediments. Conclusions The silt/clay fraction of the bottom sediments plays a dominant role in the movement of PCDDs/Fs, while the organic matter fraction affects their sorption. The results indicate that the environmental behaviour of PCDDs/Fs is affected by the quantity and quality of organic matter and the texture of sediments.
Author Agnieszka Baran (FoAaE / DoAaECh)
Agnieszka Baran,,
- Department of Agricultural and Environmental Chemistry
, Monika Mierzwa-Hersztek (FoAaE / DoAaECh)
Monika Mierzwa-Hersztek,,
- Department of Agricultural and Environmental Chemistry
, Magdalena Urbaniak - Polska Akademia Nauk
Magdalena Urbaniak,,
-
, Krzysztof Gondek (FoAaE / DoAaECh)
Krzysztof Gondek,,
- Department of Agricultural and Environmental Chemistry
, Marek Tarnawski (FoEEaLS / DoHEaG)
Marek Tarnawski,,
- Department of Hydraulic Engineering and Geotechnics
, Magdalena Szara (FoAaE / DoAaECh)
Magdalena Szara,,
- Department of Agricultural and Environmental Chemistry
, Marek Zieliński - Instytut Medycyny Pracy im. prof. Jerzego Nofera w Łodzi
Marek Zieliński,,
-
Journal seriesJournal of Soils and Sediments, ISSN 1439-0108, e-ISSN 1614-7480, (N/A 100 pkt)
Issue year2020
No20
Pages2588-2597
Publication size in sheets0.5
Keywords in EnglishBottom sediments, PCDDs/Fs, Anthropogenic sources, Ecological assessment, Organic matter, Partial size
ASJC Classification1904 Earth-Surface Processes; 1913 Stratigraphy
DOIDOI:10.1007/s11368-019-02492-3
URL https://link.springer.com/article/10.1007/s11368-019-02492-3
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
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An assessment of the concentrations of PCDDs/Fs in contaminated bottom sediments and their sources and ecological risk of 10-06-2020
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Score (nominal)100
Score sourcejournalList
Publication indicators WoS Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.119; WoS Impact Factor: 2018 = 2.669 (2) - 2018=3.011 (5)
Citation count*1 (2020-08-15)
Additional fields
FinansowanieThe study was financed by grant no. 2016/21/B/ ST10/02127: “Assessment of the bottom sediment organic matter on bioavailability and toxicity of chemical compounds” provided by the National Science Centre, Poland.
Dyscypliny zgłoszone przezAgnieszka Baran
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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