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Bioaccumulation of heavy metals in marine organisms from the Romanian sector of the Black Sea

Paper ID Volume ID Publish Year Pages File Format Full-Text
33298 44966 2015 10 PDF Available
Title
Bioaccumulation of heavy metals in marine organisms from the Romanian sector of the Black Sea
Abstract

•Analysis of heavy metals in water, sediments and biota of Romanian Black Sea coast.•Heavy metals bioaccumulation in the vicinity of anthropogenic pollution sources.•Bioconcentration factors calculated for marine species, correlated with metals concentrations in water/sediments.

The aim of this research was to study the accumulation of heavy metals (cadmium – Cd, lead – Pb, chromium – Cr, nickel – Ni, and copper – Cu) from water and sediments into living tissues of relevant marine species from different trophic levels of a food web, representative for shallow waters of the Romanian Black Sea Coast where the main anthropogenic impacts exist. The heavy metals concentrations were analysed by using an Atomic Absorption Spectrometer with graphite furnace, the results being further used to calculate the bioconcentration factors for a few key taxa like green and red algae, molluscs and fishes.Seven sampling sites influenced by anthropogenic pollution sources (municipal wastewater treatment plants and diffuse sources) were considered and a total of 300 samples were analysed for the period 2011–2012, this being the first unitary study for the Romanian Black Sea marine ecosystem.In 2011 and 2012 there were no significant differences between the sampling areas considering the heavy metals concentrations in water. For the sediments significant differences were observed between sampling sites for some heavy metals, namely Pb in 2011 and Pb, Cu and Cd in 2012, the highest concentrations being registered in the southern sector of the Romanian Black Sea shore, where the anthropogenic pollution sources are represented by the harbour and wastewater treatment plants.The values of the bioaccumulation factors (BCFsed) shows that algae are good accumulators for Cu > Pb > Ni > Cr > Cd, in comparison with BCFwater where the order of heavy metal accumulation was different: Cr > Ni > Pb > Cd > Cu. Molluscs have higher bioconcentration factors for Cu and Cd for sediments and for Cu and Ni for water. Rapana venosa accumulated more Cd and Cu. For fishes, Pb, Cu and Ni had the highest values in the tissues of benthonic species Mullus barbatus. In bivalve molluscs and fishes, in the majority of cases, there were not recorded exceeding mean concentrations as compared to the maximum allowed concentrations for Cd and Pb.

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Bioaccumulation of heavy metals in marine organisms from the Romanian sector of the Black Sea
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Publisher
Database: Elsevier - ScienceDirect
Journal: New Biotechnology - Volume 32, Issue 3, 25 May 2015, Pages 369–378
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us