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Persistent Hg conta...
Persistent Hg contamination and occurrence of Hg-methylating transcript (hgcA) downstream of a chlor-alkali plant in the Olt River (Romania)
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- Bravo, Andrea G. (författare)
- Uppsala universitet,Limnologi
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- Loizeau, Jean-Luc (författare)
- Univ Geneva, Inst FA Forel, Earth & Environm Sci, 10 Route Suisse, CH-1290 Versoix, Switzerland.
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- Dranguet, Perrine (författare)
- Univ Geneva, Inst FA Forel, Earth & Environm Sci, 10 Route Suisse, CH-1290 Versoix, Switzerland.
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- Makri, Stamatina (författare)
- Univ Geneva, Inst FA Forel, Earth & Environm Sci, 10 Route Suisse, CH-1290 Versoix, Switzerland.
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- Björn, Erik (författare)
- Umeå universitet,Kemiska institutionen,Umea Univ, Dept Chem, SE-90187 Umea, Sweden.
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- Ungureanu, Viorel Gh. (författare)
- Univ Bucharest, Fac Geol & Geophys, Bucharest, Romania.;GeoEcoMar, Natl Res & Dev Inst Marine Geol & Geoecol, Bucharest, Romania.
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- Slaveykova, Vera I. (författare)
- Univ Geneva, Inst FA Forel, Earth & Environm Sci, 10 Route Suisse, CH-1290 Versoix, Switzerland.
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- Cosio, Claudia (författare)
- Univ Geneva, Inst FA Forel, Earth & Environm Sci, 10 Route Suisse, CH-1290 Versoix, Switzerland.
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(creator_code:org_t)
- 2015-12-11
- 2016
- Engelska.
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Ingår i: Environmental Science and Pollution Research. - : Springer Science and Business Media LLC. - 0944-1344 .- 1614-7499. ; 23:11, s. 10529-10541
- Relaterad länk:
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https://archive-ouve...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Chlor-alkali plants using mercury (Hg) cell technology are acute point sources of Hg pollution in the aquatic environment. While there have been recent efforts to reduce the use of Hg cells, some of the emitted Hg can be transformed to neurotoxic methylmercury (MeHg). Here, we aimed (i) to study the dispersion of Hg in four reservoirs located downstream of a chlor-alkali plant along the Olt River (Romania) and (ii) to track the activity of bacterial functional genes involved in Hg methylation. Total Hg (THg) concentrations in water and sediments decreased successively from the initial reservoir to downstream reservoirs. Suspended fine size particles and seston appeared to be responsible for the transport of THg into downstream reservoirs, while macrophytes reflected the local bioavailability of Hg. The concentration and proportion of MeHg were correlated with THg, but were not correlated with bacterial activity in sediments, while the abundance of hgcA transcript correlated with organic matter and Cl- concentration, indicating the importance of Hg bioavailability in sediments for Hg methylation. Our data clearly highlights the importance of considering Hg contamination as a legacy pollutant since there is a high risk of continued Hg accumulation in food webs long after Hg-cell phase out.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- Bacterial activity
- Biota
- Dispersion
- Methylmercury
- Reservoir
- Sediments
- Water
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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